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Wing Beats Volume 8 Number 3wingbeats.floridamosquito.org/Wingbeats/pdfs/Vol8No3.pdf · 2014. 4. 11. · Stan Cope, Norfolk, VA Betsy Field, Vero Beach, FL John Gamble, New Smyrna

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Page 1: Wing Beats Volume 8 Number 3wingbeats.floridamosquito.org/Wingbeats/pdfs/Vol8No3.pdf · 2014. 4. 11. · Stan Cope, Norfolk, VA Betsy Field, Vero Beach, FL John Gamble, New Smyrna

POBox 60005

Fon 1-middotlyers FL 33906

Editor-in-Chief

l 5 191 Homestead Rd Lehigh FL 3397 1

Dennis Moore F011 Myers FL middotoice 941-694-274 fax 941-694-6959 e-mai l moored maildmsstateflus

lanaging Edi tor Charlie Morris Vero Beach FL 56 1-778-7204 (voice or fax)

Associate Editors Stan Cope Norfolk VA Betsy Field Vero Beach FL John Gamble New Smyrna Beach FL

Graphics Charlie Morris Vera Beach FL Alan Curtis Vero Beach FL Jeremiah Jenner Vero Beach FL

Column Editors Chemine middot Doug Wassmer Odessa FL Chip Chatmiddot Tom Floore Panama City FL Crankcase Eddiemiddot Ed Meehan Mound MN

Regional Ed itolS Massachusetts Timothy D Deschamps Norwood Michiganmiddot T~omas R Wilmot Sanford New Jersey William C Reinert Northfield Oregon middot Peter DeChant Portland Texasmiddot Dan Sprenger C01pus Christi Utah Glenn Collett Salt Lake City

Editorial Review Board Alan Cu nis Vero Beach FL David Dame Gainesville FL Gerry Hutney Tampa FL L Philip Lounibos Vero Beach FL

Florida Mosquito Control Associa tion Shelly Redovan Executive Director POBox 60837 Fort Myers FL 33906-0837 voice 94-694-2 174 fax 941433-5684

FMCA 1996-1997 Board of Directors President

G Alan Curtis Vero Beach FL President-elect

David Dame Gainesville FL Vice-President

Joseph P Ruff Panama City FL Immediate Past Pres ident

W Gene Baker Tallahassee FL Northwest Regional Representative

Margaret Crawford Santa Rosa Beach FL Northeast Regional Representative

Bob Betts St Augustine FL Southwest Regional Representative

Mark Latl1am Palmeuo FL Southeast Regional Representative

Gregory Scou Key West FL Member-at-Large

Pete Pederson Sanford FL

ofthe Florida Mosquito Control Association Volume 8 Number 3 Fall 1997

Chip Chat Mosquitoes and the Internet Part 11 4 by 7oml~

Biosynopsis The Tule Mosquito Culex erythrothorax 8 by 8itt U~ P~ Z

Viewpoint Ravages of Malaria 1 0 bye~ ReeltU

News You Can Use 12

Response to Viewpoint 13 by 5ad P~ ad 7-ed ~~ P4- Z

Feature Applying Larvicides Formulated With Dry Carriers 14 by lCJlaquo9- Ua44Wt Jiffl_ -~ ad Jad 7~

From a Distance WHO Global Collaboration 20 by 1th s ltlaquotU P~ Z

Pest Asides Whats In a Name 23 bye~ 1t~YZ~ti4 P~ v

Notice Psorophora cyanescens in Alachua C6 Florida 26 by 9o4 7 7~ P~ Z

Registration for World Wide Directory 26 byamp~ tj~ P4- Z

UI-9- 2eaU Published quarterly by the Florida Mosquito Control Association This magazine is intended to keep all

in terested parties informed on matters as they relate to mosquito control particularly in the United States All rights reserved Reproduction in w~ole or pan for educational purposes is penni tted withou t pennission with proper citation The Florida Mosquito Control Association has not tested any of the products advertised or refetTed to in this publ ication nor has it verified any of the statements made in any of the advertisements or articles The FMCA does not warrant expressly or impliedthe fitness of any product advertised or the suitabi lity of any advice or statements contained herein Opinions expressed in Ius publication are not necessarily the opinions or policies of the Fl01ida Mosquito Control Associat ion

Subscriptions UiiH-9- 2eaU is senl free of charge to anyone within the continental United States Subscriptions are

avai lable for the cost of first class postage LO any foreign address at the fo llowing rates Europe UK and Australia US$20 Canada US$6 Soutl1 America US$1 0 Make checks and purchase orders payable to the Florida Mosquito Control Association and send to FMCA PO Box 60837 Fort Myers FL 33906-0837

Correspondence Address all correspondence regarding UI-9- 2eaU to the Editor-in-Chief Dennis Moore PO Box

60005 Fort Myers FL 33906 Readers are invited to submi t articles related to mosqu ito and biting fly biology and control or letters to the Editors to the Editor-in-Chief There is no charge if you r anicle or letter is printed Photographers and artists are invited to submit color transparencies or high quali ty original artwork or artwork in electronic format (CGM) for possible use in the magazine or on the cover $ 100 will be paid for each cover photo Businesses are invited to place advertisements through the Editor-in-Chief

About the Cover A collage of mosquito stamps from the collection of Jim Rindfleisch of the Yorktown Mosquito Control Association Yorktown VA

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In this installment two more mailing lists will be described and several other Internet and Web addresses will be provided for your information

CULICID

Culicid is a mosquito mailing list established by the Northwest Mosshyquito and Vector Control Associashytion (NWMVCA http wwwnwmvcaorg) It was the brainchild of Ron Montgomery (rmontgomorednetorg) who recshyognized the opportunity for NWMVCA to better serve the mosshyquito and vector control community This list serves as a forum for comshymunication and discussion regardshying mosquitoes public health vecshytors and their control within the NWMVCA area as well as the gloshybal reaches of the Internet The list was established in the spring of 1995 and currently has over 180 subscribers The list is moderated by Ron (nwmvca orenetorg Tel 541 5675201) so that discussions stay on track Messages on the list are currently being archived on NWMVCAs Web site

Topics include but are not lim-ited to mosquito and vector

4

bull sampling methods bull control bull behavior bull bionomics bull ecology bull general biology bull legislativeregulatory issues bull mosquito borne diseases bull environmental issues relashy

tive to control practices

Fall1997

- ~

bull meeting announcements bull web pages Internet sites

relative to mosquito and vector control

Topics are largely determined by the interests and concerns of the subscribers

To subscribe to Culicid send an e-mail message to majordomo orednet org with the words subscribe culicid in the body The subject line will be igshynored If your e-mail program aushytomatically adds your signature to the end of your message put the word END on a separate line afshyter the word SUBSCRIBE

There are no charges associshyated with Culicid Subscribing simshyply puts your name on the list of people who will receive messages sent to the list The subscribe messhysage to majordomo orednet org will be forwarded to the listowner moderator for approval This may take a few days If your SUBshySCRIBE message is repeatedly returned undelivered check to make sure that you have the adshydress spelled right If it is spelled right wait a day or so and try again - it is possible that they might be experiencing network problems If after repeated attempts you canshynot subscribe send e-mail to nwmvca orednetorg and they will try to solve the problem

Once you have subscribed sending a message to culicidorednetorg will send your message to all subscribers Culicid is not case sensitive therefore

- ~~ -7~-7~

CAPITAL and capital look the same to the computer

Postings on the list must pertain to mosquito or vector control or reshysearch Commercial announceshyments are limited to announceshyments regarding new and updated labels for products and new prodshyucts andor services General adshyvertising is not allowed and the listowner may bounce any postings that in its judgement are irrelevant or constitute advertising

To remove yourself from the list send the following e-mail unsubscribe culicid John Doe where John Doe is the real name of the subscriber to majordomo orednet org

Entomo-L

Entomo-L Mailing List is mainshytained by Peter Kevan (pkevanuoguelphca) at the Unishyversity of Guelph Guelph Ontario Canada This mailing list serves as a general forum for exchange of information news views questions and answers on general entomoshylogical topics

Discussion topics include but are not limited to

bull taxonomysystematics bull sampling methods bull ecology amp behavior bull general entomology bull pathogens amp diseases bull meeting announcements bull bionomics bull control bull physiology

continued on page 6

DIBROMreg Concentrate provides fast consistent knockdown of adult mosquitoes

DIBROM Concentrate will effectively control your large-area mosquito problems whether its residential areas and municishypalities tidal marshes swamps and woodshylands or livestock pastures and feedlots

DIBROM is a fast-acting short residual

organophosphate insecticide that is proven effective against the most tolerant and resistant strains of mosquitoes

By using DIBROM as labeled you wont affect fish wildlife or livestock so its environmentally compatible It can easily be applied by ground or air and its low application rate gives significantly more coverage per tankload

If youre looking for a solution to largeshyarea mosquito control look to DIBROM Concentrate Make sure they never get off the ground again

DIBROMreg CONCENTRATE Always read and follow label directions DIBROvi is a registered trademark of Valent USA Corporatioo copy1996 Valent USA Corp

VALENTreg

~ ~

continued from page 4

The topics are largely detershymined by the subscribers

To subscribe to Entomo-L send your e-mail to LJSTSER listserv uoguelph ca with a blank subject line and the following message in the body Subscribe Entomo-L John Doe where John Doe is your real name You will receive a confirmation of being added to the list by return eshymail Peter reports that there are currently over 1200 members

To send a message to all subshyscribers send your mail to EntomoshyL listservuoguelphca To send inquires to the moderator send your e-mail t~ LISTSERV listserv uoguelph ca There is no charge for Entomo-L and it is not case sensitive Howshyever unlike the other lists there is a variety of subscription options for Entomo-L To determine which is right for you send e-mail to LISTSERVJistservuoguelphca with QUERY Entomo-L in the body Youll receive a posting of the options available by return e-mail

Contributions to the list are aushytomatically archived An archived list is available by sending an Inshydex Entomo-L command to LISTSERV istserv uoguephca You can order the files you want with a Get Entomo-L LOGxxxx command where xxxx is the nushymeric file number obtained from the archive list A database of contrishybutions is also available You may leave this list anytime by sending your e-mail to LISTSERVIistservuoguelphca with either of the following messhysages in the body Signoff EntomoshyL or Unsubscribe Entomo-L

6 Falll997

More useful Internet Web sites

Listservuacsc 2albanyedu BEE-L - a discussion group for

bee RampD To subscribe send e-mail to the address above and Subshyscribe John Doe in the body of the message

Listserv lehighedu Lymenet-L - Lyme disease

newsletter to subscribe send eshymail to the above address with Subscribe LYMENET John Doe in the body

MosquitoNet A dial-in bulletin board for Calishy

fornia mosquito control workers maintained by Bruce F Eldridge at UC-Davis To access Mosquito Net dial 916-752-5484 There is no charge (other than phone charges) for the service You will open an account for information purposes

httpwwwfamuedujamsarl indexhtml

- John A Mulrennan Sr Arthroshypod Research Laboratory Fla AampM University - Our homepage where several other links are possible to other useful Web sites

httpwwwmosquitoorg American Mosquito Control Asshy

sociation

httpwwwumaaorg Utah Mosquito Abatement Assoshy

ciation

httpwww-rcirutgersedu -insectsnjmcahtm

New Jersey Mosquito Control Association

httpwwwnwmvcaorg Northwest Mosquito amp Vector

Control Association

httpwwwfamuedujamsrl fmcaindexhtml

Florida Mosquito Control Asso-ciation middot

http wwwuwyoed uag psiscJockwoodllinklisthtm

List of entomology sites

httpwwwentiastateedu ListEiectronic_Publicationhtml List of (more) entomology sites

httpgvnifasufledu -entwebentomolohtm

University of Florida Department of Entomology and 1Jematology Home Page

There are many more Internet sites of an entomological nature You may want to conduct your own search by trying one of the followshying search engines

Yahoo at httpsearch yahoo com

Excite at httpwwwexcitecom

Hotbot at httpwwwhotbotcom

WebCrawler at httplwebcrawlercom and

search for entomology andor mosquito

Feel free to e-mail me if you would like to share some web sites Flooret mailfirnedu

Tom _ F_Ioore Is -a Research Entomologist -~i-th middot themiddot middotJohn

middot A middot middotMulre(inan Sr -Resear-ch middot middot Laboratorymiddot in middotPamilma City middot Florida _-middot-_ middot middot- middot middot = middot middot middot

PURE AND SIMPLE Pump FYFANON ULV directly from our drum to your tank It goes in undiluted - eliminates the potential for costly mixing errors and reduces employee chemical exposure In the new returnable refillable container FYFANON also eliminates triple rinsing and container disposal- What could be easier

Todays FYFANON ULV is better than ever- 96-98 pure and less acutely toxic than resmethrin permethrin femhion or naled

FYFANON saves you time money and labor Do the math and youll see- FYFANON covers more acres for fewer dollars than any competing product

CHEMINOVA aetter Cheminova Inc bull 1700 Route 23 bull Suite 210 bull Wayne New Jersey 07470 bull 800-548-6113

[~middot ~-l_m_p~o_rt_a_n_c~e~_] Culex erythrothorax is a comshy

mon pest near thickly vegetated marshes and backwaters in the western United States This mosshyquito exhibits crepuscular peaks in feeding activity as do other co-ocshycurring Culex species such as Culex tarsalis and Culex quinquefasciatus However unlike its congeners Culex erythrothorax

readily feeds during the day parshyticularly if disturbed from the vegshyetation in and surrounding larval developmental sites Although sevshyeral arboviruses have been isolated from field collected Culex erythrothorax throughout its range in the western United States Culex erythrothorax is thought not to play a significant role in arbovirus (St Louis encephalitis and western equine encephalomyelitis viruses) transmission

8 Fall1997

~itt 3()~~-~~ ot The Tule Mosquito

Culex erythrothorJX

[Geographic Di~tribution J

The geographic range of Culex erythrothorax extends from southshyern Idaho to Mexico Specimens have been collected east of the Rocky Mountains in southeastern Colorado and west of the Southshyern High Plains in west Texas This species is common in freshwater marshes in Nevada in Utah and in the foothill and coastal areas of California The western extent of its range is the Channel Islands off the coast of California middot

[ Adult Descmiddotription

The reddish coloration of the thorax readily distinguishes Culex erythrothorax from its congeners Pale basal markings of the abdomishynal terga and the absence of tarshysal banding can be used to sepashyrate this species from nearly all of the other Culex in California exshycept for the pipiens group Hairshylike scutal scales and the narrow yellowish indistinct abdominal bands readily separate Culex erythrothorax from Culex pipiens and Culex quinquefasciatus

~ middotLarval Description J The long narrow siphon the

distribution of hair tufts on the sishyphon and the morphology of lower head hairs distinguish the later inshystars of Culex erythrothorax larvae from larvae of commonly occurring congeners The length of the sishyphon is six to seven times its basal

width The siphonal hairs consist of more than one branch and the third and fourth pair of hairs on the siphon are inserted laterally The remaining three pair of siphonal hairs are inserted ventrally The nurnber of branches of the lower head hairs (group number 6) is inshytermediate among the Culex found in California

Larval Habitat andmiddot Behavior

Larval developmental sites inshyclude freshwater impoundments seeps and ditches that contain stands of tule (bulrush) and cattail vegetated river margins large pershymanent swamps and man-made wetlands containing considerable vegetation Larvae are typically difshyficult to collect by dipping As comshypared to the relative abundance of adults collected by carbon dioxideshybaited traps and by emergence traps Culex erythrothorax is undershyrepresented in larval surveys Onshygoing studies comparing the beshyhavior of Culex erythrothorax larshyvae to co-occurring congeners (Culex tarsal is and Culex quinquefasciatus) indicate that Culex erythrothorax larvae are much more sensitive to physical disturbance (ie shadows and disshyturbance of the water surface) than are larvae of congeners Other asshypects of larval behavior such as diving pattern aggregation attracshytancy to vertical egges etc of Culex erythrothorax also differ apshypreciably from its congeners The

continued on page 11

There have been a lot of changes lately

but NOT WITHmiddot USmiddot ADAPCO still offers the most complete range

of quality products for mosquito control

industrys change Companies grow and expand change their names or close their doors ADAPCO is still the same ol company Our company motto remains the same growth through service with integrity

We continue to support this industry provide the best equipment and chemicals available and continue our research and development to constantly improve our product line

Growth through service with Integrity

2800 S FI NANCI AL COURT SAN FORD FLORIDA 32773-811 8 800-367-0659 bull FAX (407) 330-9888 bull

E-MAIL adapco missketacom ADAPCOs Miss Keta

SUSTAI NING MEMBERS OF FMCA amp AMCA

I

_ l ewpoint

I

Were back say P vivax and P faciparum two of the little felshylows in the microbe world that cause malaria

More exotic diseases catch the attention of the media and Hollyshywood - Ebola for example which killed about 250 people in six months in the last outbreak in Afshyrica

Heck we kill 5000 Africans a day our little microbe friends say And were coming back to the United States where we once were very common as recently as the 1930s In fact we never left We just dont get our fair share of the media spotlight Liberal press you know

Globally malaria which is spread by a mosquito kills more than 27 million people a year and sickens about a half-billion

People cau go somewhere pick up au iufectiou aud fly back home loug before the symptoms show up

These and other interesting facts are from a well-written piece in the August issue of Atlantic Monthly by Ellen Ruppel Shell You should read it

10 Fall1997

IVly own trusty Statistical Abshystract of the United States shows that there have been an average of 1 200 cases of malaria per year in the United States for the last six years

Malaria can cause brain damage and is fatal in 10 percent to 50 pershycent of the cases What intrigues me is that we are as happens when societies become irrational workshying at cross-purposes

Environmentalists want to preshyserve swamps and create more They now call them wetlands and they are sacred They are also the places where mosquitoes breed not only those which are carriers of malaria but also those which carry yellow fever (you really dont want old yellow jack to come back) denshygue or breakbone fevermiddot and enshycephalitis

Environmentalists also don t want to spray pesticides But it was the draining of swamps and the spraying of pesticides that ended the terrible toll malaria once exshyacted from Americans

Maybe it would not matter exshycept for global trade immigration illegal immigration tourism and all of the above aggravated by jet travel

People can go somewhere pick up an infection and fly back home long before the symptoms show up People can arrive here full of infecshytion without showing symptoms

Doggone those unintended conshysequences

I dont often look into my crystal ball (its mainly a paperweight) but if I were going to make a long-term bet Id bet that environmental exshytremism is about at the end of its run

Let a few hundred voters die from malaria and I suspect the politicians will suddenly look quite differently on the alleged value of swamps and a no-pesticide policy

Imagine a mini-epidemic of mashylaria or breakbone fever in a major tourist area

Given the number of internashytional visitors and illegal immigrants who do the menial jobs such an epidemic is not that far-fetched

I live in such an area and I can tell you that the murder of just one foreign tourist gives the chamber of commerce the hoteliers the atshytraction owners and even the govshyernor one giant-sized migraine

Imagine what a migraine if 300 or 400 tourists ended up in a hosshypital with a contagious tropical disshyease It would not as they say in flack world be good publicity

It would in fact be terrible pubshylicity because a prospective tourist might reason correctly that the odds of getting shot are slim but the odds of getting bitten by a mosquito during a mostly outdoor vacation are considerably higher They would stay away

continued on page 13

continued from page 8 sensitivity to disturbance and the afshyfinity of Culex erythrothoraxlarvae for vegetation make sampling by dipper very difficult and unreliable

[ Bloodfee~fng middot__ middot_ _ J

Culex erythrothorax is an opporshytunistic feeder which shows a disshytinct east-west cline in feeding prefshyerences In the eastern part of its range individuals collected near Salt Lake City were found to feed primarily on birds In southeastern California engorged individuals were found to feed equally on birds and mammals In much of central and southern California blooded females fed primarily (about 90 of identifiable blood meals) on mammals Rabbits cattle dogs and humans are among the most commonly utilized mammalian hosts

middot middot s~rvival- and middot _ Dispersat ~~ middot

Comparatively good survival of adult females and limited dispersal tendencies are two important facshytors causing large host-seeking populations to develop in the vicinshyity of bulrush marshes At well esshytablished wetlands in southern Calishyfornia it is not uncommon to colshylect between 10000 and 33000 females per C0

2-baited trap per

night during the summer Female survivorship is typically higher than for other co-occuring congeners Compared to other Culex species host-seeking Culex erythrothorax females typically disperse short disshytances Host seeking females are rarely collected more than 2 to 25 kilometers from developmental

sites However local wind condishytions and the availability of hosts may cause large numbers to disshyperse distances greater than 25 km (15 miles) from natal sites The anthropophily of this species could make Culex erythrothorax a distinct pest of humans residing near wetshylands

middot _ BiH Walton is an Assistant Professor with the Dep~_rtment of Entomology- University _ot

middot ~atifo~riia Riverside_cA-92521

American Biophysics quality products are now available

through Clarke Mosquito Control Products

for your convenience

Chill Table

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sorting and counting and no sink is needed

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lftii ~CLARKE MOSQUITO ~CONTROL PRODUCTS INC

email clarkecmosquitocom web wwwcmosquitocom

bull-----bullA Strategic Partnership--------

Fall 1997 11

- ~ middot-middot ~

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gt -_middot~Nmiddotews-middot y middotOU Calt middotuse-~ -~-middot-- middot_ middot middot - bull 7 bull bull ~ bull -

Position middot Announcement

MOSQUITO CONTROL MANAGER

HERNANDO COUNTY FL

Responsible for the planning supervision and direct execution of environmental programs operated by the County

REQUIREMENTS Graduation from a 4-year college or university with a degree in entomology or the basic sciences Five years experishyence in the operation of mosquito control or environmental programs Certification in the category of Pubshylic Health Pest Control in conformity with Public Law 92-515 regulating the application of restricted use pesticides in the State of Florida State Certification in the category of Right-of-Way Pest Control State Certification in the category of Aquatic Weed Control Must posshysess and maintain a valid Florida drivers license and be insurable by Countys current insurance carrier

Open until filled Pay Grade 21 0 Salary $321 09annually To receive an application or send a resume write to Hernando County Human Resourses 20 North Main Street Room 260 Brooksville FL 34601 or phone (352)754-4120 EOEAAMF0V and Drug-Free Workplace

12 Fa111997

- middotmiddot-

-middot -

- - ~

Meetings of Interest

FMCA Annual Fall Meeting November 16-20 1997

1997 Annual Fall Meeting of the Florida Mosquito Control Associashytion Radison Ponce de Leon Reshysort in St Augustine FL

For more information contact Shelly Redovan PO Box 60837 Fort Myers FL 33906-0837 Tel (941) 694-2174 Fax (941) 694-6959

Entomological Society of America Annual Meeting December 13-18 1997 Nashville TN

Contact (301) 731-4535 or e-mail meetentosocorg

Info is available on the web at httpwwwentosocorg

MVCAC Annual Conference January 25-28 1998

661h Annual Mosquito and Vecshytor Control Association of Califorshynia Conference Tenaya Lodge Fish Camp California

Contact Don Eliason at Tel (916) 685-2600 Fax (916) 685-1768 e-mail movcacaolcom

WCMVCA Annual Meeting February 19-201998

West Central Mosquito and Vecshytor Control Association meeting at the Grand Vista Hotel in Grand Junction CO

Contact Wayne Kramer at (402)471-0506 for more informashytion

AMCA Annual Meeting March 8-12 1998 John Ascuagas The Nuggett

(800)648-1177 in Sparks Nevada

Contact AMCA Central Office (318) 47 4-2723 for more informashytion

North American Conference on Pesticide Spray Drift Management March 29-April 1 1998 Holiday Inn by the Bay Portland Maine

For further information contact Jim Dill UMCE Pest Management Office 491 College Ave Orono ME 04473-1295 Tel (207) 581-3880 Fax (207) 581-3881

Visit their Web Site at httpwwwstatelleus

agriculturedrift1htm

continued from page 10 All Im suggesting is that we have

put up with extremists and village idiots long enough and wed better settle back into down-to-earth realshyistic work in the fields of public health public safety and governshyment in general Weve allowed the inmates to run the asylum long enough Now its time for a return to normal behavior normal actions and sensible science

Daffy ideas and ideology notshywithstanding if you play around with nature it will kill you -~

~charley Ree~e i$ ~ middot synCti middot -cated columnist with the _ Orla~dQ _Sentinel lie _can ~e reached __ by email at middot -

middot - OSOre~se~aol_corn -- middot -~ middot copy 1997~ Klt-_G FEA_TURE middotsvNDICATE-INC-middot

- Editorsmiddot_Vote-Themiddot previ6middotus articent1~ - w$smiddot i ri ~~

eluded-to sHmul~te tllowght middotandmiddot hopefully elicit a -response from our readers middot- Wel i ltludn~i our -editorial procentessmiddot it was brought to my atten-middot tion -f~at a responsemiddot _to this-article had-alreadY be-E3ri submitted to __ the Orlando -sentineL - instead of pub Hshingmiddot this response lnih~ ~next i5sue of WingBeats 1-chose middotto ind~demiddot it akgtrig wi_th tflis articlemiddot -to _provfde another viewpoint wmiddotIJich -rnay h~lp to-correct a few oftlie inaccuracies

bull fi fi fi bull bull bull bull bull bullbull

-- Bothmiddot vlewpbi nts_~app~eEtr as stJbmitted- _without middot edjthig middot as shotild any y iewpoiot middotmiddot -lt middot -

-- If youmiddot 1yOUidJiketQ CXgtmirleht on

this -artiCle _ or any other serid your re~porise tq middot

Dennis Moore middot P-O Box -66oo5 middot

middotFort Myers Fl_ middot33906 middot middot Tel 941~694~2174 --- middotmiddot

middot Fax 941--694-695S middot -middot e~mail rnooredniailcimsstatefLIls

-middot_~esporise middot tr middot_ VlewpointColumn middot

Charlie Reeses August 14th colshyumn proclaims that the preservashytion of wetlands and the reduction of pesticide spraying near these areas will in the near futu re lead to many cases of malaria and other diseases He states that this is environmental extremism and not realistic

Unfortuntely his sensible scishyence lacks the support of actual facts For instance the 1 200 cases of malaria per year in the United States for the past six years are almost all imported cases conshytracted in other countries where conditions are more conducive to transmission Only a handful of malaria cases transmitted within the states have been recorded within the last 40 years Although the draining of swamps and spraying of pesticides did play a role in the reduction of malaria in Florida they were only a portion of the solution Window and door screenings coupled with the spread of air conshyditioning throughout Florida played a large role in keeping mosquitoes out of houses where pesticides couldnt reach

Furthermore the mosquitoes that transmit yellow fever and dengue do not breed in swamps but in small containers (such as flower pots and rain gutters) scattered thoughout every neighborhood Pesticides are often ineffectual against these urban mosquitoes So window screening again played a major role in reducing these two diseases in Florida

Although wetlands are the known breeding grounds for many mosquitoes manipulated wetlands such as rice fields in Texas orange groves cattle pastures and cane fields in Florida actually pose a much larger threat to people in

terms of producing large numbers of disease vectors The alleged value of swamps that Mr Reese mentions lies in the functions of rain and stormwater collection and disshypersal Without such wetlands rain must go somewhere and many low-lying agricultural areas such as rice fields and orange groves turn into mosquito breeding grounds

Draining swamps and spraying pesticides are not a magic bullet for mosquito and disease control Reliance on these methods alone has taught mosquito control and health officials harsh lessons Mosshyquitoes and the diseases they spread have complicated life cycles which can intertwine with our own socioeconomic cycles

Mr Reese should contact the village idiots and extremist who work daily in mosqito control to learn the facts The difficult task of controlling mosquitoes in Florida is an ongoing challenge We have learned from others that have failed to utilize multiple control methods and relied too heavily upon one method

Pesticide resistance of malarial mosquitoes presents a real danger to public health For example the over-use of DDT for malaria conshytrol as well as crop protection in Sri Lanka failed to prevent the disease and resulted in over 400000 cases of malaria in 1975 Cotton farmers in El Salvador and Guatemala have been drenching their fields with every known insecticide These actions have produced malaria mosquitoes resistant to all chemishycals Mr Reese is right on one count If you fool around with nashyture it can kill you

middot- -zach --Prumiddotsa_~ ~Enviroomental middot As$9ciate and Fred Harderi -CQri$Jitan_t_ are with middott_ll_e Reedy middotmiddot Creek lniproverrientDistrict in -

middotmiddot Lake Buena vlst~ - FL middot- middot middot

Fal11997 13

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Most modern mosquito control operations include larviciding as an integral part of their pest manageshyment practices Mosquito larvicides are available in a wide range of types and formulations Dry formushylations include briquets granules and pellets

Formulations usually are applied directly out of the container genershyally with no need for mixing Some sand formulations may be made on site by following instructions proshyvided on the labels There is usushyally a range of rates for each forshymulation to cover different habitats and water quality depth movement and organic content plus other facshytors discussed on product labels

Selecting the formulation and application rate that gives you the best coverage for your larval habishytats requires some thought Dryshyformulated larvicides may be apshyplied by hand with ground equipshyment and by air In this article we focus on ground applications and calibration as we have in the previshyous two articles in this series

Calibration is an encompassing principal that includes

1 determining what insecticide formulation to use

2 the rate of toxicant per acre to apply

3 the total spray volume needed to use to get good coverage

4 determining (or setting) the flow through the nozzle

5 determining the effective swath width and if appropriate the walking pace of application

14 Fall1997

After these parameters are set the applicators should practice by spraying a measured area against the clock Through practice the applicator will develop visual cues and hand-eye coordination which leads to standardizing hisher covshyerage per minute These factors apply to granular blowers horn seeders and other dry formula apshyplication tools including aerial spreaders

Choosing The Formulation

The three active ingredients most commonly used in dry larvishycide formulations are temephos sshymethoprene and delta-endotoxin (Bti) All three may be mixed with plaster (eg Altosid Briquetsreg Altosid XR Briquetsreg Altosid Pelshyletsreg and 5 Skeeter Abatereg) with food substances (Bactimos Pelshyletsreg) or with cork (Bactimos Brishyquetsreg) They also may be attached to ground-up corncob (eg Vectobac Greg and Vectobac CGreg) paper pulp waste material (eg Abadac which is liquid Abate plus Biodacreg Aitodac which is Altosid Liquid Larvicidereg plus Biodac) or sand (eg 1 Skeeter Abatereg LarvXSGreg and Aitosand which is Altosid Liquid Larvicide plus sand) Briquets generally are designed for use at rates ranging from 1 per 200 square feet (218 per acre) to 1 per 25 square feet (1742 per acre) A typical application rate is 1 per 1 00 square feet (436 per acre) in many situations Some granular products may be applied at up to 20 lbs per

acre but applicators typically used 5-10 lbs per acre

Briquets and pellets slowly reshylease toxicants to provide sustained control for one or more months The Bti toxicants are stomach poisons which must be placed in that part of the water column where the tarshyget larvae feed S-methoprene and temephos are contact poisons which mix with the entire water column Bactimos Briquets which float are primarily a mixture of Bti and cork and are often staked in place to prevent their being moved by wind waves and animals Altosid Briquets Altosid XR Brishyquets Altosid Pellets and Skeeter Abate Pelletsreg are made with plasshyter and sink to the bottom Some mosquito control agencies place briquets in fine wire mesh baskets and suspend them in storm drains just above the bottom so they are not swept away or buried Sand formulations also sink but a new Bti formulation LarvXsg is coated with vermiculite which reshyleases and carries the Bti back to the surface from which it is reshyleased Some Bti corncob granshyules in each bag will float while othshyers may sink This is also true for formulations using Biodac as a carshyrier

Briquets are most commonly dispensed by hand but Clarke Equipment Companys Arrow Gunreg is sometimes used to broadcast Altosid Briquets but not Bactimos Briquets The Arrow Gun uses compressed air captured from a non-thermal ULV aerosol generashytor to propel briquets down its barshyrel It may be used for lobbing one

or a few briquets into isolated small pools where placement is not a critishycal issue both in terms of cost and eHiciency Applicators may also use a slingshot The Arrow Gun works very well for applying pellet ground corn cob and other granushylar carrier formulations in large amounts In order for the equipment to be used properly as with any application equipment it must first be calibrated

Figure 1 shows release rates for Altosid Briquets Altosid XR Brishyquets and Altosid Pellets These curves are adapted from an article by Dr Doug Ross et a called Methoprene concentrations in freshwater microcosms treated with sustained-release Altosid formulashytions (Mosquito News 1994 Vol 1 0(2 pt 1 pp 202-21 0 They are indirect measures of release rates derived by measuring the concenshytration of active ingredients in the water Notice that the AI is not reshyleased uniformly throughout the active life of the formulations Conshysider this when you are larviciding We suspect that most solid larvishycides have characteristic release rate curves but we are not aware of any published descriptions If we could tap into the EPAs confidenshytial data files we might be able to find out more about this topic

In a large rectangular area usshying a 1 briquet1 00 sq ft applicashytion rate if briquets are placed in the recommended 1 0 foot intervals in even rows the maximum (diagoshynal) distance between two adjacent briquets is a little over 14 feet Imagshyine a square with a briquet in each corner and mosquito larvae in the center a little over 7 ft from each briquet To decrease the maximum diagonal distance between briquets to 1 0 feet while still placing briquets every 10 feet in rows stagger the rows so the briquets in the second row are between the briquets in the first row Materials science tells us this is the most efficient spacing scheme We recommend practic-

ing briquet placement in a mowed yard prior to actual field work This will allow you to get your spacing right Monroe County (Florida) Mosquito Control District field pershysonnel typically hand-apply over 20000 Altosid Briquets every year by walking their breeding sites with a 2 gallon pail full of product

STAGGERED X X X

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Another problematic situation occurs when treating a narrow ditch If a ditch averages 8 feet wide you would apply a briquet every 125 linear feet to get the 1 briquet per 1 00 sq feet If the ditch averaged 2 feet wide you would apply one briquet for every 50 linshyear feet In the case of a narrow ditch and in the absence of any external mixing forces such as wind or water flow the concentrashytion will be higher than expected adjacent to the briquet because the toxicants cannot disperse equal distances in all directions In addition the concentration of AI at the center point between adjacent briquets may be below the lethal dose Exposure of mosquito larvae to sublethal doses may result in resistance to the AI If the water is flowing the problem is solved but you may get accelerated briquet erosion Altosid Briquet labels provide instructions for treatshyments in moving water

East Volusia Mosquito Control District (Florida) developed a method to apply a whole seasons worth of Altosid (30-day) Briquets

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DAYS AFTER APPLICATION

Figure 1

Release rates for Altosid Briquets altosid XR Briquits and Altosid Pellets

Fall1997 15

at one time They cap a 6-8 inch section of 1-inch ID PVC pipe atshytach this (cap-side up) to an alumishynum stake (packing tape works great) and drill a 38 inch hole through it at the other end Brishyquets are inserted into the cylinder sometimes with color coded poker chips as spacers and a wire is run through the hole (or the stake is bent inward) to prevent the briquets from falling out prematurely The stake is driven into the bottom at the breeding site As the breeding site is flooded the bottom briquet erodes away releasing AI Trapped air prevents water from reaching the other briquets Another briquet falls down to take its place when it is about gone A field inspector can count poker chips to see how many Altosid Briquets have been used up

When bottom contours are highly irregular and the water depth is shallow and decreasing you may

not want to use briquet formulations at all Consider whether or not the briquet will ever be isolated from any part of the intended treatment area during its active life If so larshyvae may escape control efforts The amount of carrier material used can dictate the quality of control you achieve and is a very important consideration Unless we formulate our own pesticides we must work with a fixed amount of toxicant per pound as determined b~middot the manushyfacturer for an average situation Wouldnt it be nice to have a series of dry formulations based on the same AI that best fit different situashytions

Consider Figure 2 for a moment It shows the approximate average number of particles per square yard for four different carriers This graph is the result of investigations by students attending the weekshylong Florida Mosquito Control Asshysociation Dodd Short Courses on

Larviciding during 1996 and 1997 plus the work of Pasco CMCDs John Schaediger who washed and counted thousands of grains of sand Notice that 6 pounds of Biodac1200 contain about the same number of particles as 1 0 lbs of 1 014 grit corn cob If you have determined that 1 0 lbs of Vectobac CG (which uses 1 014 grit corn cob) is the correct application rate for you then perhaps 6 pounds of Biodac 1200 formulated with the same amount of Bti will do the same job and save you 40 in weight At these rates they both contain approximately the same number of carrier particles per pound The weight difference could increase the economics of aerial application where the lower weight translates into more acres per payshyload per flight

We apply 75 lbs of granulated 1 014 grit corncob per acre as our base rate This includes both in-

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house mixes of blank granules with active ingredients and commercially finished products The 75 lbs is not just a figure that has been pulled out of the sky but one that many trials and observations have shown to be necessary to get good coverage with a variety of bottom contours and vegetation types You may need a different base rate When field personnel are conshyfronted with heavy detritus or vegshyetation aggregated larvae or a preponderance of late in star larvae they can then increase their applishycation by slowing down their pace or narrowing the swath to raise the dosage of pesticide (remembering to stay within the maximum labeled rate)

Whatever the formulation the proper application is critical to the efficiency and effectiveness of your program Larvicide labels comshymonly include only very general guidelines for application techshyniques or equipment selection This latitude allows applicators and technical staffs to choose a system that works best for their circumshystances A granular label notes the material should be applied unishyformly in conventional aerial and ground equipment

Equipment Calibration

Equipment calibrations are imshyportant for the effectiveness of your operation Consistency is born out of practice on top of more practice Failures of larvicides are often atshytributed to missed areas caused by poor applications Calibrating flows on dry application equipment is done either by timing how long it takes for a known amount to pass through the unit or by collecting all the material blown from the nozzle for a fixed period of time and then weighing it Either should be done by two people one that handles the machine and one that does the timshying The collection method retains

the material for subsequent tests but may restrict the flow on certain machines Machines with powershyful air blasts can only be checked by timing the discharge of a known quantity

Knowledge of the flow rate and of factors affecting it are critical to calibration The most common powshyered ground equipment used for dry applications is the gasolineshyengined backpack mistblower duster The units are capable of providing even coverage good throw and are simple to use They typically broadcast granules in a 40-60 ft swath width with the operator walking at 1-3 miles per hour This translates to 5-20 acres per hour of spray time Several things can be done to change the flow rate with the nozzle orifice or disc as the primary determinate Changing the pressure will also change the flow but to a much lesser degree and it has other side effects Some power dusters have movable grates that regulate flow over the normal opshyerating range Some brands have a series of replaceable orifice discs that allow discharge rate changes in small steps Blower speed also affects the throw but that should have marginal effect on the disshycharge rate

Other ground equipment that may be used include crank slinger seeders horn seeders and modishyfied ULV equipment (eg Arrow Guns mentioned above) The flow of spinning disc spreaders or othshyers with a mechanical agitator may be somewhat affected by the opshyerational speed Horn seeders which have about a 20 ft swath width when applying Bti granules are often used by our field personshynel to treat small sites They have replaced the Dipper and Bucket method where an applicator fills a dipper from a bucket of granules and then carefully and evenly broadcasts them

An Example

Assume you have determined that you can comfortably apply B ti corncob granules in 50ft swaths at 2 mph (121 acreshour) using a duster and you want to apply them at 25 to 10 lbsacre To get proper coverage in typical vegetation you will use 5 lbsacre and when conshyfronted with adverse conditions you may double or in this case with a maximum label rate of 20 lbs acre quadruple the application to get the proper dosage of pesticide to the insect

Fill the hopper with granules making sure not to get any pieces of paper or other debris mixed into the product If the unit is equipped with an air agitation system make sure that it is operational Start the engine and make sure that the granules are free flowing through the nozzle If the unit is equipped with an adjustable gate style regushylator center it for an initial trial Close the flow control For collectshying granules you need a nylon stocking and a scale that measures to ounces or grams Place the stocking over the discharge tube and secure it with a rubber band The stocking should be supported so it wont pinch the air flow off Run the blower up to speed and then open the flow valve as you start timing Have the operator open the valve as the stop watch is started

Because of the very low flows (small quantities) of granules needed take a sample over a given period in the 3-5 minute range Shut the flow off as the timer notes the end of the period Pull the colshylection into the bottom of the stockshying and remove it from the nozzle Place another stocking on the duster and collect a second sample and then a third sample Collect at least three samples weigh each and average the results Be sure to subtract the weight of the stock-

Fall1997 17

ing before calculating the average If one sample volume is much higher or lower than the other two samples then replace the odd sample with a new one Assume you collected three 5-minute samples that weigh 61 64 and 59 oz each The average is 61 3 oz5 min or 1227 ozmin

Practice

Swath tests are best done inishytially using a paved surface such as a parking lot for a practice spray plot because the granules are easshyily seen Blank granules for pracshytice and for your own formulating may be purchased from The Andersons (800-537-3370) and other sources Get 1014 grit if you use Vectobac CG or an equivalent and 58 grit if you use Vectobac G or an equivalent Fill the hopper with a weighed quantity of granules and walk over the plot trying to cover the entire area with an even dosage To determine how much was applied empty the hopper and weigh the material remaining Afshyter a good distribution has been

mast~red move onto a measured field where the terrain is more diffishycult and continue practicing Proshygressively move into more difficult areas as your skill level increases You can get to the point where you know what 5 lbsacre looks like in any habitat and then when you apshyply the real stuff you will know you have done so properly

Assume your practice spray plot is 18 of an acre Therefore to get the proper dose you want to apply 18 of 5 lbs (0625 lbs or 10 oz) to the plot You earlier calculated that your duster is putting out approxishymately 1225 oz per min The calshyculated time to put out the 1 0 oz required to treat the test plot is 082 minutes or49 seconds [determined by dividing 10 ounces by 1225] You also determined that you can treat 121 acreshour at a 2 mph walking speed At that speed you can treat about 16 of an acre in 49 seconds You have three choices to adequately cover your 18 acre practice plot 1) You can walk at your normal speed and apply at a rate slightly higher than 5 lbsacre 2) you can walk a little slower and

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apply at the normal rate or 3) you can decrease the flow rate a bit to achieve the target rate at your norshymal application speed The choice is yours

If you have any questions feel free to contact the authors at Pasco County Mosquito Control District 2308 Marathon Road Odessa Fl 33556 Phone 813-376-4568 Fax 813-376-470 Email pcmcdgtenet

~

Doug middot wassmer _ _Jim middot _ Robinson middotand Jack-Frerich middotmiddot middot are-middot vyith the pascomiddotmiddotc_qun~y middot Mosquito Control bistr_ict middot

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In order to control or eradicate vector-borne disease the world Health Organization launched a substantial program of research on the screening evaluation and deshyvelopment of pesticides for the conshytrol of disease vectors and human pests in the early 1960s This proshygram of research and development continued into the 1970s Various collaboration centers and WHO regional research laboratories were involved in this multiphasic evaluashytion and research program This program was later designated as WHO-PES (WHO Pesticides Evaluation Scheme) which inshycluded laboratory screening of new pesticides and their formulations and finally small-scale and largeshyscale village field trials where effishycacy safety and feasibility of applishycation were studied Additionally whenever possible impact on the level of endemic diseases was also assessed The 41

h phase of this scheme addressed specification of pesticides and their formulations to be used in vector control

The WHO-PES program evenshytually came to a halt in the eighties and with restructuring of the vector Biology and Control Division in WHO this program came to a grinding halt It soon became apshyparent that member countries carshyrying on substantial vector control programs especially mosquito conshytrol operations soon reached the stage when appropriate tools and strategies for use in operational programs became quite scarce Member countries put forward deshymands for the development of more effective and safer chemical and

20 Fa111997

biological control measures To reshyspond to this global demand the Division of Control of Tropical Disshyeases (CTD) at WHO reinvigorated the WHO-PES Program by holding an informal consultation on the Evaluation and Testing of Insectishycides on October 1996 where I was asked to serve as the Chairperson of the consultation Copies of the report of this Consultation can be obtained from Dr Zaim Morteza whose address appears at the end of this article

As a result of the Informal Conshysultation and other discussions held at WHO regarding the future need for public health pesticides CTD recently (1996) launched the GCDPP program This is indeed a crucial program which requires colshylaboration among national and inshyternational agencies research inshystitutions industry and regulatory agencies The main objectives elshyements and scope of this program are briefly discussed below

The main objectives of the GCDPP program are

bull To facilitate the search for alternative pesticides including mishycrobial pesticides as well as applishycation methodologies

bull To advise on the relative priority of activities within the manshydate of GCDPP

bull To advise on issues related to the development and use of pesshyticides and application equipment within the context of WHOs global disease control strategies

bull To promote harmonization of activities related to pesticide deshyvelopment and safe use

bull To promote and encourage the highest quality of work through appropriate resource mobilization

bull GCDPP will serve as an advisory group to CTDWHOPES in matters of pesticide developshyment safe and proper use and apshyplication equipment

Membership and Meetings

A number of agencies organishyzations and manufacturers of pesshyticides and application equipment will become members of GCDPP as well as foundations and WHO Collaborating Centers Other groups and -organizations involved in manufacturing pest manageshyment and crop protection will also be invited Attempts will be made to maximize representation but at the same time ensure appropriate balance In addition to the above distinguished scientists and direcshytors of WHO Regional Offices may also be invited to attend the meetshyings of GCDPP

GCDPP will provide a forum for the exchange of technical informashytion and oversee the WHO-PES biennial plan and collaboration with other organizations and institutions GCDPP will meet every other year in Geneva Switzerland Informal consultation meetings on specific topics will be convened as the need arises CTD will be responsible for the organization of such meetings

continued on page 25

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How many of you know the names Norma Jean Baker Cornelius Magillicutty dichloroshydiphenyl-trichloro-ethane Haliaeetus leucocephalus and its distant relative Taxodium distichum How about Aedes albopictus Well if you are willing to bet $100 you know all six withshyout looking at the answers then you are either very bright very old well read or have too much time on your hands If you know only one I hope its the Asian tiger mosquito What if for the remaining five I gave you the hints of Some Like it Hot baseball legend insecticide whiteshyheaded bird and tree with knees The older ones amongst us and thats getting to be a higher percentshyage each year should recognize Marilyn Monroe and Connie Mack for the first two All of you should be ashamed of yourself if you dont recognized DDT The last two reshylated by name only are Bald Eagle and Bald Cypress If you got both of those you are probably psychic and also know what the point of this article is

And what is the point of this arshyticle the need for common names for mosquitoes Most of us know the birds plants and mammals by their common names Why then must we for the most part use scishyentific names for mosquitoes There are other names that would be more meaningful easier to spell and certainly easier to pronounce Ill bet my $100 right now that 50 of us couldnt spell Toxorhynchites or taeniorhynchus in a spelling bee Thank goodness Aedes abopictus had a catchy common name when

- bull bull -middot ~ bull middot- ~ bull ~ bull

it became established in the US in 1985 Never mind that the common name conjured up all sorts of wrong impressions Asian tiger mosquito was a lot easier for the public and press and I dare say most mosshyquito control practitioners to undershystand and remember Also our friends at the Entomological Socishyety had the accepted common name as Forest Day mosquito but to their credit they changed it to what every one calls it the Asian tiger mosquito

So despite their scientific bent scientists can be influenced to change their minds If common names and abbreviations too didnt have a purpose that is to help us to communicate then we would all be saying too many long boring and confusing sentences Consider the following For years Cornelius Magillicutty sprayed his back yard with dichloro-diphenylshytrichloro-ethane for Aedes abopictus and then years later with Norma Jean Baker at his side watched the thin-shelled eggs of Haliaeetus leucocephalus drop out of 500-year old Taxodium distichum that he loved so much Yawn

Its that kind of phraseology that keeps people including some scishyentists from reading the scientific literature When trying to commushynicate any word or phrase that your listener doesnt know or understand tends to confuse them annoy them or make them feel inferior and that often makes them stop listening Communicating with the public has become a major mosquito control activity in recent years When com-

municating with the public scientific terms and jargon are neither desirshyable or necessary Mosquito control activities can be explained in very simple terms We could use the term Bacillus thuringiensis var israeensis instead of BTl but how many of us do Telling the average person SLE is an arbovirus doesnt give them any more information than telling them its a virus

And whats with this italics stuff for scientific names Ask people (inshycluding you perhaps) why we italishycize scientific names and most will probably guess that its to emphashysis the term Wrong If you care why look it up Lets forget it from now on OK If you cant write Culex quinquefasciatus without italics then consider my alternative-comshymon names that dont need to be italicized

The Entomological Society of America has a committee that conshysiders and usually rejects proshyposed official common names for insects There are only 14 mosshyquitoes on that list and I dare say most of us dont use most of them The problem with this list is that it was developed by scientists and everyone knows that all scientists are mad not just those in the movshyies Scientists want to do things in a scientific manner-logical meshythodical and precise Just because the entomological journals will only let you use accepted common names in their pages doesnt mean we cant use other common names in presentations and io print and we should

Fall1997 23

What we need is a list of comshymon names that the average mosshyquito control practitioner uses No one that anyone takes seriously will say they found some Culex pipiens quinquefasciatus (note no italics) in a polluted pond Most will say quinks Sure we can capitalize Quinks if it makes you feel better it does me So why are we afraid to write Quinks in our reports or say Quinks in formal talks Most people probably dont say quinks (see I dont insist on capitalization) because they think it makes them sound unprofessional Quinks is a distinctive short easy to rememshyber and fun to say name it has a beat that you can dance to and I give it a 99 Does anyone you know call quinks the southern house mosquito the accepted common name How about northern house mosquito for pipiens

Taenies or taenys or whatshyever spelling you want to use is easily recognized by east and south coast mosquito people as the comshymon name for Aedes taeniorhynchus one of the saltmarsh mosquitoes Again its a distinctive short easy to rememshyber and fun name It also describes the size of the species somewhat small or teeny-a bonus And who doesnt use Tox as the common name for our other spelling bee example

We dont hesitate to use comshymon names for a group of mosquishytoes that breed in a particular habishytat In addition to saltmarsh mosshyquitoes we refer to floodwater mosquitoes (which incidently also describes many saltmarsh mosquishytoes) tree hole mosquitoes dirty water mosquitoes grey water mosshyquitoes freshwater mosquitoes container-breeding mosquitoes pasture mosquitoes rock hole mosshyquitoes crab hole mosquitoes and on and on These habitat names are not mutually exclusive For exshyample pasture mosquitoes are also floodwater mosquitoes and fresh-

24 Fall1997

water mosquitoes By the way the translation of floodwater mosquito according to the Entomological Soshyciety is Aedes sticticus What Habitat names are also convenient for discussions among people from different geographic areas For example nature tends to give the same qualities to mosquitoes that breed in tree holes regardless of whether they are tree holes in Calishyfornia Virginia Queensland or Borneo From an operational mosshyquito control standpoint knowing the habitat of the mosquito can be more informative than knowing its scientific name

So lets consider some common names of species that we might use One common pest and potenshytial vector species that needs a common name is Coquillettidia perturbans (I think Ive weaned myself from italics) the aggressive biter whose larvae attach to the roots of aquatic plants particularly cattails (I could have said Typha species) Cattail mosquito is a natural even though larvae may attach to a variety of plants Another name could be the salt and pepshyper mosquito or another name taken from its scientific name could be the perturbing mosquito

How about the Anopheles The accepted common name for Anopheles quadrimaculatus is the common malaria mosquito This may have been accurate when malaria was a problem in this counshytry but now neither malaria nor this mosquito is common in this counshytry Im sure most of our hypothetishycal naming committee made up of operational mosquito controllers would call them quads

We have already dealt with Quinks Another obvious common name for another Culex Cx salinarius is sally or sallys or sallies Culex restuans is a little more tricky but how about rusty Rusty is suggestive of the color of the mosquito and it is similar to

resty a name that just doesnt sound right to me

Aedes vexans a common floodshywater mosquito in much of the US needs a common name The acshycepted common name vexans mosquito would be OK if most people know what vexing means And if they do why not call it the vexing mosquito Calling Aedes aegypti in the US by its accepted name the yellowfever mosquito is misleading Yellow fever has been absent from the US since right after the turn of the century Aegypti or gyps is often used by field and lab workers so why not adopt those terms

I could go on and on but Im more interested in what you think If you will send me your common names (keep it clean please) for any species you are familiar with Ill be happy to compile them and report back in a future article in Wing Beats (Theres that italics again different reason) If they appear in Wing Beats maybe just maybe we can call them official common names You can fax me at 561-778-7204 or E-mail me at cdmognvifas ufledu By the way you can address the message to Charlie Chas or Char The only person I insist call me doctor is my ex-wife and I would rather she didnt call me at all

-C_h~ulie M~rtis middot is an Assoshy _ciate middotPi~fesso( at the Unishy versity ~f floridas Medical Eiitomology Laboratory middot hi middot middot

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continued from page 20

providing support for report prepashyration and other documents and perform secretarial functions

Funding

In order to advance the objecshytives of GCDPP a stable source of funding will be necessary WHO CTD (WHO-Division of Control of Tropical Diseases) will establish and administer a trust fund which will be designated as GCDPP-Trust Fund which will be administered according to the WHO financial rules regulations and practices

The trust fund will be used to convene meetings production and dissemination of documents exshychange and dissemination of inforshymation on the need for public health pesticides and equipment and for activities which will promote the development and use of alternative safe compounds or application equipment

1James of organizations institushytions foundations manufacturers and individuals participating and contributing to this program will be listed Each participant will be enshycouraged to make annual contribushytions to the trust fund

Further Information

For further information on WHOshyPES or GCDPP contact Dr Zaim Morteza WHO-PES CTD World Health Organ ization 1211 Geneva 27 Switzerland E-mail zaimmwhoch

Nlir smiddotMulla is a Profes-sor with the Deparfrilent of ~nt-oshy_mologyUniverslty at califor middot -nia Riversidemiddot CA92521 middot _ middot middot

-

middotMulla= Receives -middot

Recognition Awar(j _

Mir S Mulla Professor of Entoshymology Department of Entomolshyogy University of California Rivershyside CA was presented the Scishyence Society of Thailand~ Meritoshyrious Recognition Award by the Thailand Minister of Science and Technology last October

Mulla an authority on insects of medical and public health imporshytance was cited for his efforts and leadership in organizing the First International Symposium on Biopesticides convened at Naresuan University in Thailand This symposium attended by some 300 participants from 20 countries covered biodiversity safety toxicshyity efficacy and proper use of biopesticides based on natural products and pathogenic organshyisms The proceedings of this first symposium amounting to 300 pages will be published soon

Mulla informs us that the 2nd International Symposium on Biopesticides will be held in late October 1998 on Langkawi Island off the coast of Malaysia Anyone interested in receiving further inforshymation regarding the proceedings or the second symposium should contact Dr Mulla at tel (909) 787-5818 fax (909) 787-4210 and eshymail mulla mailucredu

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Fall1997 25

Notice Psotophora middotgtcyaneseens collect~d middotin Aiachua County FL

- ~

and 9 pupae of this species were collected by the author from a sunshylit small (ca 2 m diam and 20 em deep) grass-lined pool filled with rainwater at Gainesville Florida

a common identification number with their 41h instar larval and pupal exuviae On subsequent visits to the site no additional Ps cyanescens were collected

Psorophora cyanescens (Coquillett) previously has been reported in Florida from the followshying counties Bay Duval Escambia Gadsden Hillsborough Jackson Leon Okaloosa Suwannee and Union (HT Evans Florida Mosquito Control Handbook 1994) On 26 May 1997 one 4h instar larva

Also collected from the pool were numerous larvae and pupae of Psorophora columbiae (Dyar and Knab) Aedes vexans (Meigen) and Culex salinarius Coquillett and 17 4h instar larvae of Psorophora ciliata (Fabricus) All immatures were individually reared and the resulting adults were linked by

John -Fmiddotmiddoteeinert is with Jlie CeMte(for Medicental middotAgricultural

aridVet$rih~rY Entomology u s ~ Department oFAgricul~umiddotre Agri-

26

culture~ 8e$earch Service 1600 1700 SW 23dDrive Gainesvillemiddotmiddot

bull lt middot bullbullbull _ bull bull middot J

Florida 32604 middot middot middot

REGISTRATION FOR WORLD DIRECTORY OF ARTHROPOD VECTOR RESEARCH AND CONTROL SPECIALISTS

In order to update the Directory we would appreciate your completing this form Please type or print and return it to the address listed below We would also appreciate your copying this form and supplyshying it to any colleagues who are working in this field Your cooperation will allow greater communication and efficiency within our profession

Name (Last or family name) (First or given name)

Title of present position ----------- Nationality

Present Address _______________________________ _

Telephone (Work) _____ (Home) _____ Fax ______ E-mail _______ _

DEGREES DATE UNIVERSITY

Languages understood Specialty ------------

Professional society affiliations AMCA __ SOVE __ ESA __ ASTMH __ RSTMH __ ESC __

Other ______________________ _

Please return by Air Mail to Dr Eugene Gerberg Chairman AMCA International Affairs Committee 5819 NW 57th Way Gainesville FL 32653-3257 USA

Fall1997

Date completed

Were Sales VW ampR s professional educated experienced staff knows and understands the vector control industry You can count on us to be there when you need us

Were Service VW ampR has over 70 locations across the United States and Mexico that offer convenient local vector control products Count on our professional and knowledgeable industry experts to assist you in finding solutions to your problems

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Page 2: Wing Beats Volume 8 Number 3wingbeats.floridamosquito.org/Wingbeats/pdfs/Vol8No3.pdf · 2014. 4. 11. · Stan Cope, Norfolk, VA Betsy Field, Vero Beach, FL John Gamble, New Smyrna

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middot middot MOS~ito Cotttrot AgeudesPartll middotmiddot -

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In this installment two more mailing lists will be described and several other Internet and Web addresses will be provided for your information

CULICID

Culicid is a mosquito mailing list established by the Northwest Mosshyquito and Vector Control Associashytion (NWMVCA http wwwnwmvcaorg) It was the brainchild of Ron Montgomery (rmontgomorednetorg) who recshyognized the opportunity for NWMVCA to better serve the mosshyquito and vector control community This list serves as a forum for comshymunication and discussion regardshying mosquitoes public health vecshytors and their control within the NWMVCA area as well as the gloshybal reaches of the Internet The list was established in the spring of 1995 and currently has over 180 subscribers The list is moderated by Ron (nwmvca orenetorg Tel 541 5675201) so that discussions stay on track Messages on the list are currently being archived on NWMVCAs Web site

Topics include but are not lim-ited to mosquito and vector

4

bull sampling methods bull control bull behavior bull bionomics bull ecology bull general biology bull legislativeregulatory issues bull mosquito borne diseases bull environmental issues relashy

tive to control practices

Fall1997

- ~

bull meeting announcements bull web pages Internet sites

relative to mosquito and vector control

Topics are largely determined by the interests and concerns of the subscribers

To subscribe to Culicid send an e-mail message to majordomo orednet org with the words subscribe culicid in the body The subject line will be igshynored If your e-mail program aushytomatically adds your signature to the end of your message put the word END on a separate line afshyter the word SUBSCRIBE

There are no charges associshyated with Culicid Subscribing simshyply puts your name on the list of people who will receive messages sent to the list The subscribe messhysage to majordomo orednet org will be forwarded to the listowner moderator for approval This may take a few days If your SUBshySCRIBE message is repeatedly returned undelivered check to make sure that you have the adshydress spelled right If it is spelled right wait a day or so and try again - it is possible that they might be experiencing network problems If after repeated attempts you canshynot subscribe send e-mail to nwmvca orednetorg and they will try to solve the problem

Once you have subscribed sending a message to culicidorednetorg will send your message to all subscribers Culicid is not case sensitive therefore

- ~~ -7~-7~

CAPITAL and capital look the same to the computer

Postings on the list must pertain to mosquito or vector control or reshysearch Commercial announceshyments are limited to announceshyments regarding new and updated labels for products and new prodshyucts andor services General adshyvertising is not allowed and the listowner may bounce any postings that in its judgement are irrelevant or constitute advertising

To remove yourself from the list send the following e-mail unsubscribe culicid John Doe where John Doe is the real name of the subscriber to majordomo orednet org

Entomo-L

Entomo-L Mailing List is mainshytained by Peter Kevan (pkevanuoguelphca) at the Unishyversity of Guelph Guelph Ontario Canada This mailing list serves as a general forum for exchange of information news views questions and answers on general entomoshylogical topics

Discussion topics include but are not limited to

bull taxonomysystematics bull sampling methods bull ecology amp behavior bull general entomology bull pathogens amp diseases bull meeting announcements bull bionomics bull control bull physiology

continued on page 6

DIBROMreg Concentrate provides fast consistent knockdown of adult mosquitoes

DIBROM Concentrate will effectively control your large-area mosquito problems whether its residential areas and municishypalities tidal marshes swamps and woodshylands or livestock pastures and feedlots

DIBROM is a fast-acting short residual

organophosphate insecticide that is proven effective against the most tolerant and resistant strains of mosquitoes

By using DIBROM as labeled you wont affect fish wildlife or livestock so its environmentally compatible It can easily be applied by ground or air and its low application rate gives significantly more coverage per tankload

If youre looking for a solution to largeshyarea mosquito control look to DIBROM Concentrate Make sure they never get off the ground again

DIBROMreg CONCENTRATE Always read and follow label directions DIBROvi is a registered trademark of Valent USA Corporatioo copy1996 Valent USA Corp

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~ ~

continued from page 4

The topics are largely detershymined by the subscribers

To subscribe to Entomo-L send your e-mail to LJSTSER listserv uoguelph ca with a blank subject line and the following message in the body Subscribe Entomo-L John Doe where John Doe is your real name You will receive a confirmation of being added to the list by return eshymail Peter reports that there are currently over 1200 members

To send a message to all subshyscribers send your mail to EntomoshyL listservuoguelphca To send inquires to the moderator send your e-mail t~ LISTSERV listserv uoguelph ca There is no charge for Entomo-L and it is not case sensitive Howshyever unlike the other lists there is a variety of subscription options for Entomo-L To determine which is right for you send e-mail to LISTSERVJistservuoguelphca with QUERY Entomo-L in the body Youll receive a posting of the options available by return e-mail

Contributions to the list are aushytomatically archived An archived list is available by sending an Inshydex Entomo-L command to LISTSERV istserv uoguephca You can order the files you want with a Get Entomo-L LOGxxxx command where xxxx is the nushymeric file number obtained from the archive list A database of contrishybutions is also available You may leave this list anytime by sending your e-mail to LISTSERVIistservuoguelphca with either of the following messhysages in the body Signoff EntomoshyL or Unsubscribe Entomo-L

6 Falll997

More useful Internet Web sites

Listservuacsc 2albanyedu BEE-L - a discussion group for

bee RampD To subscribe send e-mail to the address above and Subshyscribe John Doe in the body of the message

Listserv lehighedu Lymenet-L - Lyme disease

newsletter to subscribe send eshymail to the above address with Subscribe LYMENET John Doe in the body

MosquitoNet A dial-in bulletin board for Calishy

fornia mosquito control workers maintained by Bruce F Eldridge at UC-Davis To access Mosquito Net dial 916-752-5484 There is no charge (other than phone charges) for the service You will open an account for information purposes

httpwwwfamuedujamsarl indexhtml

- John A Mulrennan Sr Arthroshypod Research Laboratory Fla AampM University - Our homepage where several other links are possible to other useful Web sites

httpwwwmosquitoorg American Mosquito Control Asshy

sociation

httpwwwumaaorg Utah Mosquito Abatement Assoshy

ciation

httpwww-rcirutgersedu -insectsnjmcahtm

New Jersey Mosquito Control Association

httpwwwnwmvcaorg Northwest Mosquito amp Vector

Control Association

httpwwwfamuedujamsrl fmcaindexhtml

Florida Mosquito Control Asso-ciation middot

http wwwuwyoed uag psiscJockwoodllinklisthtm

List of entomology sites

httpwwwentiastateedu ListEiectronic_Publicationhtml List of (more) entomology sites

httpgvnifasufledu -entwebentomolohtm

University of Florida Department of Entomology and 1Jematology Home Page

There are many more Internet sites of an entomological nature You may want to conduct your own search by trying one of the followshying search engines

Yahoo at httpsearch yahoo com

Excite at httpwwwexcitecom

Hotbot at httpwwwhotbotcom

WebCrawler at httplwebcrawlercom and

search for entomology andor mosquito

Feel free to e-mail me if you would like to share some web sites Flooret mailfirnedu

Tom _ F_Ioore Is -a Research Entomologist -~i-th middot themiddot middotJohn

middot A middot middotMulre(inan Sr -Resear-ch middot middot Laboratorymiddot in middotPamilma City middot Florida _-middot-_ middot middot- middot middot = middot middot middot

PURE AND SIMPLE Pump FYFANON ULV directly from our drum to your tank It goes in undiluted - eliminates the potential for costly mixing errors and reduces employee chemical exposure In the new returnable refillable container FYFANON also eliminates triple rinsing and container disposal- What could be easier

Todays FYFANON ULV is better than ever- 96-98 pure and less acutely toxic than resmethrin permethrin femhion or naled

FYFANON saves you time money and labor Do the math and youll see- FYFANON covers more acres for fewer dollars than any competing product

CHEMINOVA aetter Cheminova Inc bull 1700 Route 23 bull Suite 210 bull Wayne New Jersey 07470 bull 800-548-6113

[~middot ~-l_m_p~o_rt_a_n_c~e~_] Culex erythrothorax is a comshy

mon pest near thickly vegetated marshes and backwaters in the western United States This mosshyquito exhibits crepuscular peaks in feeding activity as do other co-ocshycurring Culex species such as Culex tarsalis and Culex quinquefasciatus However unlike its congeners Culex erythrothorax

readily feeds during the day parshyticularly if disturbed from the vegshyetation in and surrounding larval developmental sites Although sevshyeral arboviruses have been isolated from field collected Culex erythrothorax throughout its range in the western United States Culex erythrothorax is thought not to play a significant role in arbovirus (St Louis encephalitis and western equine encephalomyelitis viruses) transmission

8 Fall1997

~itt 3()~~-~~ ot The Tule Mosquito

Culex erythrothorJX

[Geographic Di~tribution J

The geographic range of Culex erythrothorax extends from southshyern Idaho to Mexico Specimens have been collected east of the Rocky Mountains in southeastern Colorado and west of the Southshyern High Plains in west Texas This species is common in freshwater marshes in Nevada in Utah and in the foothill and coastal areas of California The western extent of its range is the Channel Islands off the coast of California middot

[ Adult Descmiddotription

The reddish coloration of the thorax readily distinguishes Culex erythrothorax from its congeners Pale basal markings of the abdomishynal terga and the absence of tarshysal banding can be used to sepashyrate this species from nearly all of the other Culex in California exshycept for the pipiens group Hairshylike scutal scales and the narrow yellowish indistinct abdominal bands readily separate Culex erythrothorax from Culex pipiens and Culex quinquefasciatus

~ middotLarval Description J The long narrow siphon the

distribution of hair tufts on the sishyphon and the morphology of lower head hairs distinguish the later inshystars of Culex erythrothorax larvae from larvae of commonly occurring congeners The length of the sishyphon is six to seven times its basal

width The siphonal hairs consist of more than one branch and the third and fourth pair of hairs on the siphon are inserted laterally The remaining three pair of siphonal hairs are inserted ventrally The nurnber of branches of the lower head hairs (group number 6) is inshytermediate among the Culex found in California

Larval Habitat andmiddot Behavior

Larval developmental sites inshyclude freshwater impoundments seeps and ditches that contain stands of tule (bulrush) and cattail vegetated river margins large pershymanent swamps and man-made wetlands containing considerable vegetation Larvae are typically difshyficult to collect by dipping As comshypared to the relative abundance of adults collected by carbon dioxideshybaited traps and by emergence traps Culex erythrothorax is undershyrepresented in larval surveys Onshygoing studies comparing the beshyhavior of Culex erythrothorax larshyvae to co-occurring congeners (Culex tarsal is and Culex quinquefasciatus) indicate that Culex erythrothorax larvae are much more sensitive to physical disturbance (ie shadows and disshyturbance of the water surface) than are larvae of congeners Other asshypects of larval behavior such as diving pattern aggregation attracshytancy to vertical egges etc of Culex erythrothorax also differ apshypreciably from its congeners The

continued on page 11

There have been a lot of changes lately

but NOT WITHmiddot USmiddot ADAPCO still offers the most complete range

of quality products for mosquito control

industrys change Companies grow and expand change their names or close their doors ADAPCO is still the same ol company Our company motto remains the same growth through service with integrity

We continue to support this industry provide the best equipment and chemicals available and continue our research and development to constantly improve our product line

Growth through service with Integrity

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E-MAIL adapco missketacom ADAPCOs Miss Keta

SUSTAI NING MEMBERS OF FMCA amp AMCA

I

_ l ewpoint

I

Were back say P vivax and P faciparum two of the little felshylows in the microbe world that cause malaria

More exotic diseases catch the attention of the media and Hollyshywood - Ebola for example which killed about 250 people in six months in the last outbreak in Afshyrica

Heck we kill 5000 Africans a day our little microbe friends say And were coming back to the United States where we once were very common as recently as the 1930s In fact we never left We just dont get our fair share of the media spotlight Liberal press you know

Globally malaria which is spread by a mosquito kills more than 27 million people a year and sickens about a half-billion

People cau go somewhere pick up au iufectiou aud fly back home loug before the symptoms show up

These and other interesting facts are from a well-written piece in the August issue of Atlantic Monthly by Ellen Ruppel Shell You should read it

10 Fall1997

IVly own trusty Statistical Abshystract of the United States shows that there have been an average of 1 200 cases of malaria per year in the United States for the last six years

Malaria can cause brain damage and is fatal in 10 percent to 50 pershycent of the cases What intrigues me is that we are as happens when societies become irrational workshying at cross-purposes

Environmentalists want to preshyserve swamps and create more They now call them wetlands and they are sacred They are also the places where mosquitoes breed not only those which are carriers of malaria but also those which carry yellow fever (you really dont want old yellow jack to come back) denshygue or breakbone fevermiddot and enshycephalitis

Environmentalists also don t want to spray pesticides But it was the draining of swamps and the spraying of pesticides that ended the terrible toll malaria once exshyacted from Americans

Maybe it would not matter exshycept for global trade immigration illegal immigration tourism and all of the above aggravated by jet travel

People can go somewhere pick up an infection and fly back home long before the symptoms show up People can arrive here full of infecshytion without showing symptoms

Doggone those unintended conshysequences

I dont often look into my crystal ball (its mainly a paperweight) but if I were going to make a long-term bet Id bet that environmental exshytremism is about at the end of its run

Let a few hundred voters die from malaria and I suspect the politicians will suddenly look quite differently on the alleged value of swamps and a no-pesticide policy

Imagine a mini-epidemic of mashylaria or breakbone fever in a major tourist area

Given the number of internashytional visitors and illegal immigrants who do the menial jobs such an epidemic is not that far-fetched

I live in such an area and I can tell you that the murder of just one foreign tourist gives the chamber of commerce the hoteliers the atshytraction owners and even the govshyernor one giant-sized migraine

Imagine what a migraine if 300 or 400 tourists ended up in a hosshypital with a contagious tropical disshyease It would not as they say in flack world be good publicity

It would in fact be terrible pubshylicity because a prospective tourist might reason correctly that the odds of getting shot are slim but the odds of getting bitten by a mosquito during a mostly outdoor vacation are considerably higher They would stay away

continued on page 13

continued from page 8 sensitivity to disturbance and the afshyfinity of Culex erythrothoraxlarvae for vegetation make sampling by dipper very difficult and unreliable

[ Bloodfee~fng middot__ middot_ _ J

Culex erythrothorax is an opporshytunistic feeder which shows a disshytinct east-west cline in feeding prefshyerences In the eastern part of its range individuals collected near Salt Lake City were found to feed primarily on birds In southeastern California engorged individuals were found to feed equally on birds and mammals In much of central and southern California blooded females fed primarily (about 90 of identifiable blood meals) on mammals Rabbits cattle dogs and humans are among the most commonly utilized mammalian hosts

middot middot s~rvival- and middot _ Dispersat ~~ middot

Comparatively good survival of adult females and limited dispersal tendencies are two important facshytors causing large host-seeking populations to develop in the vicinshyity of bulrush marshes At well esshytablished wetlands in southern Calishyfornia it is not uncommon to colshylect between 10000 and 33000 females per C0

2-baited trap per

night during the summer Female survivorship is typically higher than for other co-occuring congeners Compared to other Culex species host-seeking Culex erythrothorax females typically disperse short disshytances Host seeking females are rarely collected more than 2 to 25 kilometers from developmental

sites However local wind condishytions and the availability of hosts may cause large numbers to disshyperse distances greater than 25 km (15 miles) from natal sites The anthropophily of this species could make Culex erythrothorax a distinct pest of humans residing near wetshylands

middot _ BiH Walton is an Assistant Professor with the Dep~_rtment of Entomology- University _ot

middot ~atifo~riia Riverside_cA-92521

American Biophysics quality products are now available

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Fall 1997 11

- ~ middot-middot ~

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Position middot Announcement

MOSQUITO CONTROL MANAGER

HERNANDO COUNTY FL

Responsible for the planning supervision and direct execution of environmental programs operated by the County

REQUIREMENTS Graduation from a 4-year college or university with a degree in entomology or the basic sciences Five years experishyence in the operation of mosquito control or environmental programs Certification in the category of Pubshylic Health Pest Control in conformity with Public Law 92-515 regulating the application of restricted use pesticides in the State of Florida State Certification in the category of Right-of-Way Pest Control State Certification in the category of Aquatic Weed Control Must posshysess and maintain a valid Florida drivers license and be insurable by Countys current insurance carrier

Open until filled Pay Grade 21 0 Salary $321 09annually To receive an application or send a resume write to Hernando County Human Resourses 20 North Main Street Room 260 Brooksville FL 34601 or phone (352)754-4120 EOEAAMF0V and Drug-Free Workplace

12 Fa111997

- middotmiddot-

-middot -

- - ~

Meetings of Interest

FMCA Annual Fall Meeting November 16-20 1997

1997 Annual Fall Meeting of the Florida Mosquito Control Associashytion Radison Ponce de Leon Reshysort in St Augustine FL

For more information contact Shelly Redovan PO Box 60837 Fort Myers FL 33906-0837 Tel (941) 694-2174 Fax (941) 694-6959

Entomological Society of America Annual Meeting December 13-18 1997 Nashville TN

Contact (301) 731-4535 or e-mail meetentosocorg

Info is available on the web at httpwwwentosocorg

MVCAC Annual Conference January 25-28 1998

661h Annual Mosquito and Vecshytor Control Association of Califorshynia Conference Tenaya Lodge Fish Camp California

Contact Don Eliason at Tel (916) 685-2600 Fax (916) 685-1768 e-mail movcacaolcom

WCMVCA Annual Meeting February 19-201998

West Central Mosquito and Vecshytor Control Association meeting at the Grand Vista Hotel in Grand Junction CO

Contact Wayne Kramer at (402)471-0506 for more informashytion

AMCA Annual Meeting March 8-12 1998 John Ascuagas The Nuggett

(800)648-1177 in Sparks Nevada

Contact AMCA Central Office (318) 47 4-2723 for more informashytion

North American Conference on Pesticide Spray Drift Management March 29-April 1 1998 Holiday Inn by the Bay Portland Maine

For further information contact Jim Dill UMCE Pest Management Office 491 College Ave Orono ME 04473-1295 Tel (207) 581-3880 Fax (207) 581-3881

Visit their Web Site at httpwwwstatelleus

agriculturedrift1htm

continued from page 10 All Im suggesting is that we have

put up with extremists and village idiots long enough and wed better settle back into down-to-earth realshyistic work in the fields of public health public safety and governshyment in general Weve allowed the inmates to run the asylum long enough Now its time for a return to normal behavior normal actions and sensible science

Daffy ideas and ideology notshywithstanding if you play around with nature it will kill you -~

~charley Ree~e i$ ~ middot synCti middot -cated columnist with the _ Orla~dQ _Sentinel lie _can ~e reached __ by email at middot -

middot - OSOre~se~aol_corn -- middot -~ middot copy 1997~ Klt-_G FEA_TURE middotsvNDICATE-INC-middot

- Editorsmiddot_Vote-Themiddot previ6middotus articent1~ - w$smiddot i ri ~~

eluded-to sHmul~te tllowght middotandmiddot hopefully elicit a -response from our readers middot- Wel i ltludn~i our -editorial procentessmiddot it was brought to my atten-middot tion -f~at a responsemiddot _to this-article had-alreadY be-E3ri submitted to __ the Orlando -sentineL - instead of pub Hshingmiddot this response lnih~ ~next i5sue of WingBeats 1-chose middotto ind~demiddot it akgtrig wi_th tflis articlemiddot -to _provfde another viewpoint wmiddotIJich -rnay h~lp to-correct a few oftlie inaccuracies

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-- Bothmiddot vlewpbi nts_~app~eEtr as stJbmitted- _without middot edjthig middot as shotild any y iewpoiot middotmiddot -lt middot -

-- If youmiddot 1yOUidJiketQ CXgtmirleht on

this -artiCle _ or any other serid your re~porise tq middot

Dennis Moore middot P-O Box -66oo5 middot

middotFort Myers Fl_ middot33906 middot middot Tel 941~694~2174 --- middotmiddot

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Charlie Reeses August 14th colshyumn proclaims that the preservashytion of wetlands and the reduction of pesticide spraying near these areas will in the near futu re lead to many cases of malaria and other diseases He states that this is environmental extremism and not realistic

Unfortuntely his sensible scishyence lacks the support of actual facts For instance the 1 200 cases of malaria per year in the United States for the past six years are almost all imported cases conshytracted in other countries where conditions are more conducive to transmission Only a handful of malaria cases transmitted within the states have been recorded within the last 40 years Although the draining of swamps and spraying of pesticides did play a role in the reduction of malaria in Florida they were only a portion of the solution Window and door screenings coupled with the spread of air conshyditioning throughout Florida played a large role in keeping mosquitoes out of houses where pesticides couldnt reach

Furthermore the mosquitoes that transmit yellow fever and dengue do not breed in swamps but in small containers (such as flower pots and rain gutters) scattered thoughout every neighborhood Pesticides are often ineffectual against these urban mosquitoes So window screening again played a major role in reducing these two diseases in Florida

Although wetlands are the known breeding grounds for many mosquitoes manipulated wetlands such as rice fields in Texas orange groves cattle pastures and cane fields in Florida actually pose a much larger threat to people in

terms of producing large numbers of disease vectors The alleged value of swamps that Mr Reese mentions lies in the functions of rain and stormwater collection and disshypersal Without such wetlands rain must go somewhere and many low-lying agricultural areas such as rice fields and orange groves turn into mosquito breeding grounds

Draining swamps and spraying pesticides are not a magic bullet for mosquito and disease control Reliance on these methods alone has taught mosquito control and health officials harsh lessons Mosshyquitoes and the diseases they spread have complicated life cycles which can intertwine with our own socioeconomic cycles

Mr Reese should contact the village idiots and extremist who work daily in mosqito control to learn the facts The difficult task of controlling mosquitoes in Florida is an ongoing challenge We have learned from others that have failed to utilize multiple control methods and relied too heavily upon one method

Pesticide resistance of malarial mosquitoes presents a real danger to public health For example the over-use of DDT for malaria conshytrol as well as crop protection in Sri Lanka failed to prevent the disease and resulted in over 400000 cases of malaria in 1975 Cotton farmers in El Salvador and Guatemala have been drenching their fields with every known insecticide These actions have produced malaria mosquitoes resistant to all chemishycals Mr Reese is right on one count If you fool around with nashyture it can kill you

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Most modern mosquito control operations include larviciding as an integral part of their pest manageshyment practices Mosquito larvicides are available in a wide range of types and formulations Dry formushylations include briquets granules and pellets

Formulations usually are applied directly out of the container genershyally with no need for mixing Some sand formulations may be made on site by following instructions proshyvided on the labels There is usushyally a range of rates for each forshymulation to cover different habitats and water quality depth movement and organic content plus other facshytors discussed on product labels

Selecting the formulation and application rate that gives you the best coverage for your larval habishytats requires some thought Dryshyformulated larvicides may be apshyplied by hand with ground equipshyment and by air In this article we focus on ground applications and calibration as we have in the previshyous two articles in this series

Calibration is an encompassing principal that includes

1 determining what insecticide formulation to use

2 the rate of toxicant per acre to apply

3 the total spray volume needed to use to get good coverage

4 determining (or setting) the flow through the nozzle

5 determining the effective swath width and if appropriate the walking pace of application

14 Fall1997

After these parameters are set the applicators should practice by spraying a measured area against the clock Through practice the applicator will develop visual cues and hand-eye coordination which leads to standardizing hisher covshyerage per minute These factors apply to granular blowers horn seeders and other dry formula apshyplication tools including aerial spreaders

Choosing The Formulation

The three active ingredients most commonly used in dry larvishycide formulations are temephos sshymethoprene and delta-endotoxin (Bti) All three may be mixed with plaster (eg Altosid Briquetsreg Altosid XR Briquetsreg Altosid Pelshyletsreg and 5 Skeeter Abatereg) with food substances (Bactimos Pelshyletsreg) or with cork (Bactimos Brishyquetsreg) They also may be attached to ground-up corncob (eg Vectobac Greg and Vectobac CGreg) paper pulp waste material (eg Abadac which is liquid Abate plus Biodacreg Aitodac which is Altosid Liquid Larvicidereg plus Biodac) or sand (eg 1 Skeeter Abatereg LarvXSGreg and Aitosand which is Altosid Liquid Larvicide plus sand) Briquets generally are designed for use at rates ranging from 1 per 200 square feet (218 per acre) to 1 per 25 square feet (1742 per acre) A typical application rate is 1 per 1 00 square feet (436 per acre) in many situations Some granular products may be applied at up to 20 lbs per

acre but applicators typically used 5-10 lbs per acre

Briquets and pellets slowly reshylease toxicants to provide sustained control for one or more months The Bti toxicants are stomach poisons which must be placed in that part of the water column where the tarshyget larvae feed S-methoprene and temephos are contact poisons which mix with the entire water column Bactimos Briquets which float are primarily a mixture of Bti and cork and are often staked in place to prevent their being moved by wind waves and animals Altosid Briquets Altosid XR Brishyquets Altosid Pellets and Skeeter Abate Pelletsreg are made with plasshyter and sink to the bottom Some mosquito control agencies place briquets in fine wire mesh baskets and suspend them in storm drains just above the bottom so they are not swept away or buried Sand formulations also sink but a new Bti formulation LarvXsg is coated with vermiculite which reshyleases and carries the Bti back to the surface from which it is reshyleased Some Bti corncob granshyules in each bag will float while othshyers may sink This is also true for formulations using Biodac as a carshyrier

Briquets are most commonly dispensed by hand but Clarke Equipment Companys Arrow Gunreg is sometimes used to broadcast Altosid Briquets but not Bactimos Briquets The Arrow Gun uses compressed air captured from a non-thermal ULV aerosol generashytor to propel briquets down its barshyrel It may be used for lobbing one

or a few briquets into isolated small pools where placement is not a critishycal issue both in terms of cost and eHiciency Applicators may also use a slingshot The Arrow Gun works very well for applying pellet ground corn cob and other granushylar carrier formulations in large amounts In order for the equipment to be used properly as with any application equipment it must first be calibrated

Figure 1 shows release rates for Altosid Briquets Altosid XR Brishyquets and Altosid Pellets These curves are adapted from an article by Dr Doug Ross et a called Methoprene concentrations in freshwater microcosms treated with sustained-release Altosid formulashytions (Mosquito News 1994 Vol 1 0(2 pt 1 pp 202-21 0 They are indirect measures of release rates derived by measuring the concenshytration of active ingredients in the water Notice that the AI is not reshyleased uniformly throughout the active life of the formulations Conshysider this when you are larviciding We suspect that most solid larvishycides have characteristic release rate curves but we are not aware of any published descriptions If we could tap into the EPAs confidenshytial data files we might be able to find out more about this topic

In a large rectangular area usshying a 1 briquet1 00 sq ft applicashytion rate if briquets are placed in the recommended 1 0 foot intervals in even rows the maximum (diagoshynal) distance between two adjacent briquets is a little over 14 feet Imagshyine a square with a briquet in each corner and mosquito larvae in the center a little over 7 ft from each briquet To decrease the maximum diagonal distance between briquets to 1 0 feet while still placing briquets every 10 feet in rows stagger the rows so the briquets in the second row are between the briquets in the first row Materials science tells us this is the most efficient spacing scheme We recommend practic-

ing briquet placement in a mowed yard prior to actual field work This will allow you to get your spacing right Monroe County (Florida) Mosquito Control District field pershysonnel typically hand-apply over 20000 Altosid Briquets every year by walking their breeding sites with a 2 gallon pail full of product

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Another problematic situation occurs when treating a narrow ditch If a ditch averages 8 feet wide you would apply a briquet every 125 linear feet to get the 1 briquet per 1 00 sq feet If the ditch averaged 2 feet wide you would apply one briquet for every 50 linshyear feet In the case of a narrow ditch and in the absence of any external mixing forces such as wind or water flow the concentrashytion will be higher than expected adjacent to the briquet because the toxicants cannot disperse equal distances in all directions In addition the concentration of AI at the center point between adjacent briquets may be below the lethal dose Exposure of mosquito larvae to sublethal doses may result in resistance to the AI If the water is flowing the problem is solved but you may get accelerated briquet erosion Altosid Briquet labels provide instructions for treatshyments in moving water

East Volusia Mosquito Control District (Florida) developed a method to apply a whole seasons worth of Altosid (30-day) Briquets

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DAYS AFTER APPLICATION

Figure 1

Release rates for Altosid Briquets altosid XR Briquits and Altosid Pellets

Fall1997 15

at one time They cap a 6-8 inch section of 1-inch ID PVC pipe atshytach this (cap-side up) to an alumishynum stake (packing tape works great) and drill a 38 inch hole through it at the other end Brishyquets are inserted into the cylinder sometimes with color coded poker chips as spacers and a wire is run through the hole (or the stake is bent inward) to prevent the briquets from falling out prematurely The stake is driven into the bottom at the breeding site As the breeding site is flooded the bottom briquet erodes away releasing AI Trapped air prevents water from reaching the other briquets Another briquet falls down to take its place when it is about gone A field inspector can count poker chips to see how many Altosid Briquets have been used up

When bottom contours are highly irregular and the water depth is shallow and decreasing you may

not want to use briquet formulations at all Consider whether or not the briquet will ever be isolated from any part of the intended treatment area during its active life If so larshyvae may escape control efforts The amount of carrier material used can dictate the quality of control you achieve and is a very important consideration Unless we formulate our own pesticides we must work with a fixed amount of toxicant per pound as determined b~middot the manushyfacturer for an average situation Wouldnt it be nice to have a series of dry formulations based on the same AI that best fit different situashytions

Consider Figure 2 for a moment It shows the approximate average number of particles per square yard for four different carriers This graph is the result of investigations by students attending the weekshylong Florida Mosquito Control Asshysociation Dodd Short Courses on

Larviciding during 1996 and 1997 plus the work of Pasco CMCDs John Schaediger who washed and counted thousands of grains of sand Notice that 6 pounds of Biodac1200 contain about the same number of particles as 1 0 lbs of 1 014 grit corn cob If you have determined that 1 0 lbs of Vectobac CG (which uses 1 014 grit corn cob) is the correct application rate for you then perhaps 6 pounds of Biodac 1200 formulated with the same amount of Bti will do the same job and save you 40 in weight At these rates they both contain approximately the same number of carrier particles per pound The weight difference could increase the economics of aerial application where the lower weight translates into more acres per payshyload per flight

We apply 75 lbs of granulated 1 014 grit corncob per acre as our base rate This includes both in-

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house mixes of blank granules with active ingredients and commercially finished products The 75 lbs is not just a figure that has been pulled out of the sky but one that many trials and observations have shown to be necessary to get good coverage with a variety of bottom contours and vegetation types You may need a different base rate When field personnel are conshyfronted with heavy detritus or vegshyetation aggregated larvae or a preponderance of late in star larvae they can then increase their applishycation by slowing down their pace or narrowing the swath to raise the dosage of pesticide (remembering to stay within the maximum labeled rate)

Whatever the formulation the proper application is critical to the efficiency and effectiveness of your program Larvicide labels comshymonly include only very general guidelines for application techshyniques or equipment selection This latitude allows applicators and technical staffs to choose a system that works best for their circumshystances A granular label notes the material should be applied unishyformly in conventional aerial and ground equipment

Equipment Calibration

Equipment calibrations are imshyportant for the effectiveness of your operation Consistency is born out of practice on top of more practice Failures of larvicides are often atshytributed to missed areas caused by poor applications Calibrating flows on dry application equipment is done either by timing how long it takes for a known amount to pass through the unit or by collecting all the material blown from the nozzle for a fixed period of time and then weighing it Either should be done by two people one that handles the machine and one that does the timshying The collection method retains

the material for subsequent tests but may restrict the flow on certain machines Machines with powershyful air blasts can only be checked by timing the discharge of a known quantity

Knowledge of the flow rate and of factors affecting it are critical to calibration The most common powshyered ground equipment used for dry applications is the gasolineshyengined backpack mistblower duster The units are capable of providing even coverage good throw and are simple to use They typically broadcast granules in a 40-60 ft swath width with the operator walking at 1-3 miles per hour This translates to 5-20 acres per hour of spray time Several things can be done to change the flow rate with the nozzle orifice or disc as the primary determinate Changing the pressure will also change the flow but to a much lesser degree and it has other side effects Some power dusters have movable grates that regulate flow over the normal opshyerating range Some brands have a series of replaceable orifice discs that allow discharge rate changes in small steps Blower speed also affects the throw but that should have marginal effect on the disshycharge rate

Other ground equipment that may be used include crank slinger seeders horn seeders and modishyfied ULV equipment (eg Arrow Guns mentioned above) The flow of spinning disc spreaders or othshyers with a mechanical agitator may be somewhat affected by the opshyerational speed Horn seeders which have about a 20 ft swath width when applying Bti granules are often used by our field personshynel to treat small sites They have replaced the Dipper and Bucket method where an applicator fills a dipper from a bucket of granules and then carefully and evenly broadcasts them

An Example

Assume you have determined that you can comfortably apply B ti corncob granules in 50ft swaths at 2 mph (121 acreshour) using a duster and you want to apply them at 25 to 10 lbsacre To get proper coverage in typical vegetation you will use 5 lbsacre and when conshyfronted with adverse conditions you may double or in this case with a maximum label rate of 20 lbs acre quadruple the application to get the proper dosage of pesticide to the insect

Fill the hopper with granules making sure not to get any pieces of paper or other debris mixed into the product If the unit is equipped with an air agitation system make sure that it is operational Start the engine and make sure that the granules are free flowing through the nozzle If the unit is equipped with an adjustable gate style regushylator center it for an initial trial Close the flow control For collectshying granules you need a nylon stocking and a scale that measures to ounces or grams Place the stocking over the discharge tube and secure it with a rubber band The stocking should be supported so it wont pinch the air flow off Run the blower up to speed and then open the flow valve as you start timing Have the operator open the valve as the stop watch is started

Because of the very low flows (small quantities) of granules needed take a sample over a given period in the 3-5 minute range Shut the flow off as the timer notes the end of the period Pull the colshylection into the bottom of the stockshying and remove it from the nozzle Place another stocking on the duster and collect a second sample and then a third sample Collect at least three samples weigh each and average the results Be sure to subtract the weight of the stock-

Fall1997 17

ing before calculating the average If one sample volume is much higher or lower than the other two samples then replace the odd sample with a new one Assume you collected three 5-minute samples that weigh 61 64 and 59 oz each The average is 61 3 oz5 min or 1227 ozmin

Practice

Swath tests are best done inishytially using a paved surface such as a parking lot for a practice spray plot because the granules are easshyily seen Blank granules for pracshytice and for your own formulating may be purchased from The Andersons (800-537-3370) and other sources Get 1014 grit if you use Vectobac CG or an equivalent and 58 grit if you use Vectobac G or an equivalent Fill the hopper with a weighed quantity of granules and walk over the plot trying to cover the entire area with an even dosage To determine how much was applied empty the hopper and weigh the material remaining Afshyter a good distribution has been

mast~red move onto a measured field where the terrain is more diffishycult and continue practicing Proshygressively move into more difficult areas as your skill level increases You can get to the point where you know what 5 lbsacre looks like in any habitat and then when you apshyply the real stuff you will know you have done so properly

Assume your practice spray plot is 18 of an acre Therefore to get the proper dose you want to apply 18 of 5 lbs (0625 lbs or 10 oz) to the plot You earlier calculated that your duster is putting out approxishymately 1225 oz per min The calshyculated time to put out the 1 0 oz required to treat the test plot is 082 minutes or49 seconds [determined by dividing 10 ounces by 1225] You also determined that you can treat 121 acreshour at a 2 mph walking speed At that speed you can treat about 16 of an acre in 49 seconds You have three choices to adequately cover your 18 acre practice plot 1) You can walk at your normal speed and apply at a rate slightly higher than 5 lbsacre 2) you can walk a little slower and

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apply at the normal rate or 3) you can decrease the flow rate a bit to achieve the target rate at your norshymal application speed The choice is yours

If you have any questions feel free to contact the authors at Pasco County Mosquito Control District 2308 Marathon Road Odessa Fl 33556 Phone 813-376-4568 Fax 813-376-470 Email pcmcdgtenet

~

Doug middot wassmer _ _Jim middot _ Robinson middotand Jack-Frerich middotmiddot middot are-middot vyith the pascomiddotmiddotc_qun~y middot Mosquito Control bistr_ict middot

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In order to control or eradicate vector-borne disease the world Health Organization launched a substantial program of research on the screening evaluation and deshyvelopment of pesticides for the conshytrol of disease vectors and human pests in the early 1960s This proshygram of research and development continued into the 1970s Various collaboration centers and WHO regional research laboratories were involved in this multiphasic evaluashytion and research program This program was later designated as WHO-PES (WHO Pesticides Evaluation Scheme) which inshycluded laboratory screening of new pesticides and their formulations and finally small-scale and largeshyscale village field trials where effishycacy safety and feasibility of applishycation were studied Additionally whenever possible impact on the level of endemic diseases was also assessed The 41

h phase of this scheme addressed specification of pesticides and their formulations to be used in vector control

The WHO-PES program evenshytually came to a halt in the eighties and with restructuring of the vector Biology and Control Division in WHO this program came to a grinding halt It soon became apshyparent that member countries carshyrying on substantial vector control programs especially mosquito conshytrol operations soon reached the stage when appropriate tools and strategies for use in operational programs became quite scarce Member countries put forward deshymands for the development of more effective and safer chemical and

20 Fa111997

biological control measures To reshyspond to this global demand the Division of Control of Tropical Disshyeases (CTD) at WHO reinvigorated the WHO-PES Program by holding an informal consultation on the Evaluation and Testing of Insectishycides on October 1996 where I was asked to serve as the Chairperson of the consultation Copies of the report of this Consultation can be obtained from Dr Zaim Morteza whose address appears at the end of this article

As a result of the Informal Conshysultation and other discussions held at WHO regarding the future need for public health pesticides CTD recently (1996) launched the GCDPP program This is indeed a crucial program which requires colshylaboration among national and inshyternational agencies research inshystitutions industry and regulatory agencies The main objectives elshyements and scope of this program are briefly discussed below

The main objectives of the GCDPP program are

bull To facilitate the search for alternative pesticides including mishycrobial pesticides as well as applishycation methodologies

bull To advise on the relative priority of activities within the manshydate of GCDPP

bull To advise on issues related to the development and use of pesshyticides and application equipment within the context of WHOs global disease control strategies

bull To promote harmonization of activities related to pesticide deshyvelopment and safe use

bull To promote and encourage the highest quality of work through appropriate resource mobilization

bull GCDPP will serve as an advisory group to CTDWHOPES in matters of pesticide developshyment safe and proper use and apshyplication equipment

Membership and Meetings

A number of agencies organishyzations and manufacturers of pesshyticides and application equipment will become members of GCDPP as well as foundations and WHO Collaborating Centers Other groups and -organizations involved in manufacturing pest manageshyment and crop protection will also be invited Attempts will be made to maximize representation but at the same time ensure appropriate balance In addition to the above distinguished scientists and direcshytors of WHO Regional Offices may also be invited to attend the meetshyings of GCDPP

GCDPP will provide a forum for the exchange of technical informashytion and oversee the WHO-PES biennial plan and collaboration with other organizations and institutions GCDPP will meet every other year in Geneva Switzerland Informal consultation meetings on specific topics will be convened as the need arises CTD will be responsible for the organization of such meetings

continued on page 25

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How many of you know the names Norma Jean Baker Cornelius Magillicutty dichloroshydiphenyl-trichloro-ethane Haliaeetus leucocephalus and its distant relative Taxodium distichum How about Aedes albopictus Well if you are willing to bet $100 you know all six withshyout looking at the answers then you are either very bright very old well read or have too much time on your hands If you know only one I hope its the Asian tiger mosquito What if for the remaining five I gave you the hints of Some Like it Hot baseball legend insecticide whiteshyheaded bird and tree with knees The older ones amongst us and thats getting to be a higher percentshyage each year should recognize Marilyn Monroe and Connie Mack for the first two All of you should be ashamed of yourself if you dont recognized DDT The last two reshylated by name only are Bald Eagle and Bald Cypress If you got both of those you are probably psychic and also know what the point of this article is

And what is the point of this arshyticle the need for common names for mosquitoes Most of us know the birds plants and mammals by their common names Why then must we for the most part use scishyentific names for mosquitoes There are other names that would be more meaningful easier to spell and certainly easier to pronounce Ill bet my $100 right now that 50 of us couldnt spell Toxorhynchites or taeniorhynchus in a spelling bee Thank goodness Aedes abopictus had a catchy common name when

- bull bull -middot ~ bull middot- ~ bull ~ bull

it became established in the US in 1985 Never mind that the common name conjured up all sorts of wrong impressions Asian tiger mosquito was a lot easier for the public and press and I dare say most mosshyquito control practitioners to undershystand and remember Also our friends at the Entomological Socishyety had the accepted common name as Forest Day mosquito but to their credit they changed it to what every one calls it the Asian tiger mosquito

So despite their scientific bent scientists can be influenced to change their minds If common names and abbreviations too didnt have a purpose that is to help us to communicate then we would all be saying too many long boring and confusing sentences Consider the following For years Cornelius Magillicutty sprayed his back yard with dichloro-diphenylshytrichloro-ethane for Aedes abopictus and then years later with Norma Jean Baker at his side watched the thin-shelled eggs of Haliaeetus leucocephalus drop out of 500-year old Taxodium distichum that he loved so much Yawn

Its that kind of phraseology that keeps people including some scishyentists from reading the scientific literature When trying to commushynicate any word or phrase that your listener doesnt know or understand tends to confuse them annoy them or make them feel inferior and that often makes them stop listening Communicating with the public has become a major mosquito control activity in recent years When com-

municating with the public scientific terms and jargon are neither desirshyable or necessary Mosquito control activities can be explained in very simple terms We could use the term Bacillus thuringiensis var israeensis instead of BTl but how many of us do Telling the average person SLE is an arbovirus doesnt give them any more information than telling them its a virus

And whats with this italics stuff for scientific names Ask people (inshycluding you perhaps) why we italishycize scientific names and most will probably guess that its to emphashysis the term Wrong If you care why look it up Lets forget it from now on OK If you cant write Culex quinquefasciatus without italics then consider my alternative-comshymon names that dont need to be italicized

The Entomological Society of America has a committee that conshysiders and usually rejects proshyposed official common names for insects There are only 14 mosshyquitoes on that list and I dare say most of us dont use most of them The problem with this list is that it was developed by scientists and everyone knows that all scientists are mad not just those in the movshyies Scientists want to do things in a scientific manner-logical meshythodical and precise Just because the entomological journals will only let you use accepted common names in their pages doesnt mean we cant use other common names in presentations and io print and we should

Fall1997 23

What we need is a list of comshymon names that the average mosshyquito control practitioner uses No one that anyone takes seriously will say they found some Culex pipiens quinquefasciatus (note no italics) in a polluted pond Most will say quinks Sure we can capitalize Quinks if it makes you feel better it does me So why are we afraid to write Quinks in our reports or say Quinks in formal talks Most people probably dont say quinks (see I dont insist on capitalization) because they think it makes them sound unprofessional Quinks is a distinctive short easy to rememshyber and fun to say name it has a beat that you can dance to and I give it a 99 Does anyone you know call quinks the southern house mosquito the accepted common name How about northern house mosquito for pipiens

Taenies or taenys or whatshyever spelling you want to use is easily recognized by east and south coast mosquito people as the comshymon name for Aedes taeniorhynchus one of the saltmarsh mosquitoes Again its a distinctive short easy to rememshyber and fun name It also describes the size of the species somewhat small or teeny-a bonus And who doesnt use Tox as the common name for our other spelling bee example

We dont hesitate to use comshymon names for a group of mosquishytoes that breed in a particular habishytat In addition to saltmarsh mosshyquitoes we refer to floodwater mosquitoes (which incidently also describes many saltmarsh mosquishytoes) tree hole mosquitoes dirty water mosquitoes grey water mosshyquitoes freshwater mosquitoes container-breeding mosquitoes pasture mosquitoes rock hole mosshyquitoes crab hole mosquitoes and on and on These habitat names are not mutually exclusive For exshyample pasture mosquitoes are also floodwater mosquitoes and fresh-

24 Fall1997

water mosquitoes By the way the translation of floodwater mosquito according to the Entomological Soshyciety is Aedes sticticus What Habitat names are also convenient for discussions among people from different geographic areas For example nature tends to give the same qualities to mosquitoes that breed in tree holes regardless of whether they are tree holes in Calishyfornia Virginia Queensland or Borneo From an operational mosshyquito control standpoint knowing the habitat of the mosquito can be more informative than knowing its scientific name

So lets consider some common names of species that we might use One common pest and potenshytial vector species that needs a common name is Coquillettidia perturbans (I think Ive weaned myself from italics) the aggressive biter whose larvae attach to the roots of aquatic plants particularly cattails (I could have said Typha species) Cattail mosquito is a natural even though larvae may attach to a variety of plants Another name could be the salt and pepshyper mosquito or another name taken from its scientific name could be the perturbing mosquito

How about the Anopheles The accepted common name for Anopheles quadrimaculatus is the common malaria mosquito This may have been accurate when malaria was a problem in this counshytry but now neither malaria nor this mosquito is common in this counshytry Im sure most of our hypothetishycal naming committee made up of operational mosquito controllers would call them quads

We have already dealt with Quinks Another obvious common name for another Culex Cx salinarius is sally or sallys or sallies Culex restuans is a little more tricky but how about rusty Rusty is suggestive of the color of the mosquito and it is similar to

resty a name that just doesnt sound right to me

Aedes vexans a common floodshywater mosquito in much of the US needs a common name The acshycepted common name vexans mosquito would be OK if most people know what vexing means And if they do why not call it the vexing mosquito Calling Aedes aegypti in the US by its accepted name the yellowfever mosquito is misleading Yellow fever has been absent from the US since right after the turn of the century Aegypti or gyps is often used by field and lab workers so why not adopt those terms

I could go on and on but Im more interested in what you think If you will send me your common names (keep it clean please) for any species you are familiar with Ill be happy to compile them and report back in a future article in Wing Beats (Theres that italics again different reason) If they appear in Wing Beats maybe just maybe we can call them official common names You can fax me at 561-778-7204 or E-mail me at cdmognvifas ufledu By the way you can address the message to Charlie Chas or Char The only person I insist call me doctor is my ex-wife and I would rather she didnt call me at all

-C_h~ulie M~rtis middot is an Assoshy _ciate middotPi~fesso( at the Unishy versity ~f floridas Medical Eiitomology Laboratory middot hi middot middot

Verq Beach Fiorida~

continued from page 20

providing support for report prepashyration and other documents and perform secretarial functions

Funding

In order to advance the objecshytives of GCDPP a stable source of funding will be necessary WHO CTD (WHO-Division of Control of Tropical Diseases) will establish and administer a trust fund which will be designated as GCDPP-Trust Fund which will be administered according to the WHO financial rules regulations and practices

The trust fund will be used to convene meetings production and dissemination of documents exshychange and dissemination of inforshymation on the need for public health pesticides and equipment and for activities which will promote the development and use of alternative safe compounds or application equipment

1James of organizations institushytions foundations manufacturers and individuals participating and contributing to this program will be listed Each participant will be enshycouraged to make annual contribushytions to the trust fund

Further Information

For further information on WHOshyPES or GCDPP contact Dr Zaim Morteza WHO-PES CTD World Health Organ ization 1211 Geneva 27 Switzerland E-mail zaimmwhoch

Nlir smiddotMulla is a Profes-sor with the Deparfrilent of ~nt-oshy_mologyUniverslty at califor middot -nia Riversidemiddot CA92521 middot _ middot middot

-

middotMulla= Receives -middot

Recognition Awar(j _

Mir S Mulla Professor of Entoshymology Department of Entomolshyogy University of California Rivershyside CA was presented the Scishyence Society of Thailand~ Meritoshyrious Recognition Award by the Thailand Minister of Science and Technology last October

Mulla an authority on insects of medical and public health imporshytance was cited for his efforts and leadership in organizing the First International Symposium on Biopesticides convened at Naresuan University in Thailand This symposium attended by some 300 participants from 20 countries covered biodiversity safety toxicshyity efficacy and proper use of biopesticides based on natural products and pathogenic organshyisms The proceedings of this first symposium amounting to 300 pages will be published soon

Mulla informs us that the 2nd International Symposium on Biopesticides will be held in late October 1998 on Langkawi Island off the coast of Malaysia Anyone interested in receiving further inforshymation regarding the proceedings or the second symposium should contact Dr Mulla at tel (909) 787-5818 fax (909) 787-4210 and eshymail mulla mailucredu

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Fall1997 25

Notice Psotophora middotgtcyaneseens collect~d middotin Aiachua County FL

- ~

and 9 pupae of this species were collected by the author from a sunshylit small (ca 2 m diam and 20 em deep) grass-lined pool filled with rainwater at Gainesville Florida

a common identification number with their 41h instar larval and pupal exuviae On subsequent visits to the site no additional Ps cyanescens were collected

Psorophora cyanescens (Coquillett) previously has been reported in Florida from the followshying counties Bay Duval Escambia Gadsden Hillsborough Jackson Leon Okaloosa Suwannee and Union (HT Evans Florida Mosquito Control Handbook 1994) On 26 May 1997 one 4h instar larva

Also collected from the pool were numerous larvae and pupae of Psorophora columbiae (Dyar and Knab) Aedes vexans (Meigen) and Culex salinarius Coquillett and 17 4h instar larvae of Psorophora ciliata (Fabricus) All immatures were individually reared and the resulting adults were linked by

John -Fmiddotmiddoteeinert is with Jlie CeMte(for Medicental middotAgricultural

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In order to update the Directory we would appreciate your completing this form Please type or print and return it to the address listed below We would also appreciate your copying this form and supplyshying it to any colleagues who are working in this field Your cooperation will allow greater communication and efficiency within our profession

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Please return by Air Mail to Dr Eugene Gerberg Chairman AMCA International Affairs Committee 5819 NW 57th Way Gainesville FL 32653-3257 USA

Fall1997

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The topics are largely detershymined by the subscribers

To subscribe to Entomo-L send your e-mail to LJSTSER listserv uoguelph ca with a blank subject line and the following message in the body Subscribe Entomo-L John Doe where John Doe is your real name You will receive a confirmation of being added to the list by return eshymail Peter reports that there are currently over 1200 members

To send a message to all subshyscribers send your mail to EntomoshyL listservuoguelphca To send inquires to the moderator send your e-mail t~ LISTSERV listserv uoguelph ca There is no charge for Entomo-L and it is not case sensitive Howshyever unlike the other lists there is a variety of subscription options for Entomo-L To determine which is right for you send e-mail to LISTSERVJistservuoguelphca with QUERY Entomo-L in the body Youll receive a posting of the options available by return e-mail

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6 Falll997

More useful Internet Web sites

Listservuacsc 2albanyedu BEE-L - a discussion group for

bee RampD To subscribe send e-mail to the address above and Subshyscribe John Doe in the body of the message

Listserv lehighedu Lymenet-L - Lyme disease

newsletter to subscribe send eshymail to the above address with Subscribe LYMENET John Doe in the body

MosquitoNet A dial-in bulletin board for Calishy

fornia mosquito control workers maintained by Bruce F Eldridge at UC-Davis To access Mosquito Net dial 916-752-5484 There is no charge (other than phone charges) for the service You will open an account for information purposes

httpwwwfamuedujamsarl indexhtml

- John A Mulrennan Sr Arthroshypod Research Laboratory Fla AampM University - Our homepage where several other links are possible to other useful Web sites

httpwwwmosquitoorg American Mosquito Control Asshy

sociation

httpwwwumaaorg Utah Mosquito Abatement Assoshy

ciation

httpwww-rcirutgersedu -insectsnjmcahtm

New Jersey Mosquito Control Association

httpwwwnwmvcaorg Northwest Mosquito amp Vector

Control Association

httpwwwfamuedujamsrl fmcaindexhtml

Florida Mosquito Control Asso-ciation middot

http wwwuwyoed uag psiscJockwoodllinklisthtm

List of entomology sites

httpwwwentiastateedu ListEiectronic_Publicationhtml List of (more) entomology sites

httpgvnifasufledu -entwebentomolohtm

University of Florida Department of Entomology and 1Jematology Home Page

There are many more Internet sites of an entomological nature You may want to conduct your own search by trying one of the followshying search engines

Yahoo at httpsearch yahoo com

Excite at httpwwwexcitecom

Hotbot at httpwwwhotbotcom

WebCrawler at httplwebcrawlercom and

search for entomology andor mosquito

Feel free to e-mail me if you would like to share some web sites Flooret mailfirnedu

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[~middot ~-l_m_p~o_rt_a_n_c~e~_] Culex erythrothorax is a comshy

mon pest near thickly vegetated marshes and backwaters in the western United States This mosshyquito exhibits crepuscular peaks in feeding activity as do other co-ocshycurring Culex species such as Culex tarsalis and Culex quinquefasciatus However unlike its congeners Culex erythrothorax

readily feeds during the day parshyticularly if disturbed from the vegshyetation in and surrounding larval developmental sites Although sevshyeral arboviruses have been isolated from field collected Culex erythrothorax throughout its range in the western United States Culex erythrothorax is thought not to play a significant role in arbovirus (St Louis encephalitis and western equine encephalomyelitis viruses) transmission

8 Fall1997

~itt 3()~~-~~ ot The Tule Mosquito

Culex erythrothorJX

[Geographic Di~tribution J

The geographic range of Culex erythrothorax extends from southshyern Idaho to Mexico Specimens have been collected east of the Rocky Mountains in southeastern Colorado and west of the Southshyern High Plains in west Texas This species is common in freshwater marshes in Nevada in Utah and in the foothill and coastal areas of California The western extent of its range is the Channel Islands off the coast of California middot

[ Adult Descmiddotription

The reddish coloration of the thorax readily distinguishes Culex erythrothorax from its congeners Pale basal markings of the abdomishynal terga and the absence of tarshysal banding can be used to sepashyrate this species from nearly all of the other Culex in California exshycept for the pipiens group Hairshylike scutal scales and the narrow yellowish indistinct abdominal bands readily separate Culex erythrothorax from Culex pipiens and Culex quinquefasciatus

~ middotLarval Description J The long narrow siphon the

distribution of hair tufts on the sishyphon and the morphology of lower head hairs distinguish the later inshystars of Culex erythrothorax larvae from larvae of commonly occurring congeners The length of the sishyphon is six to seven times its basal

width The siphonal hairs consist of more than one branch and the third and fourth pair of hairs on the siphon are inserted laterally The remaining three pair of siphonal hairs are inserted ventrally The nurnber of branches of the lower head hairs (group number 6) is inshytermediate among the Culex found in California

Larval Habitat andmiddot Behavior

Larval developmental sites inshyclude freshwater impoundments seeps and ditches that contain stands of tule (bulrush) and cattail vegetated river margins large pershymanent swamps and man-made wetlands containing considerable vegetation Larvae are typically difshyficult to collect by dipping As comshypared to the relative abundance of adults collected by carbon dioxideshybaited traps and by emergence traps Culex erythrothorax is undershyrepresented in larval surveys Onshygoing studies comparing the beshyhavior of Culex erythrothorax larshyvae to co-occurring congeners (Culex tarsal is and Culex quinquefasciatus) indicate that Culex erythrothorax larvae are much more sensitive to physical disturbance (ie shadows and disshyturbance of the water surface) than are larvae of congeners Other asshypects of larval behavior such as diving pattern aggregation attracshytancy to vertical egges etc of Culex erythrothorax also differ apshypreciably from its congeners The

continued on page 11

There have been a lot of changes lately

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We continue to support this industry provide the best equipment and chemicals available and continue our research and development to constantly improve our product line

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Were back say P vivax and P faciparum two of the little felshylows in the microbe world that cause malaria

More exotic diseases catch the attention of the media and Hollyshywood - Ebola for example which killed about 250 people in six months in the last outbreak in Afshyrica

Heck we kill 5000 Africans a day our little microbe friends say And were coming back to the United States where we once were very common as recently as the 1930s In fact we never left We just dont get our fair share of the media spotlight Liberal press you know

Globally malaria which is spread by a mosquito kills more than 27 million people a year and sickens about a half-billion

People cau go somewhere pick up au iufectiou aud fly back home loug before the symptoms show up

These and other interesting facts are from a well-written piece in the August issue of Atlantic Monthly by Ellen Ruppel Shell You should read it

10 Fall1997

IVly own trusty Statistical Abshystract of the United States shows that there have been an average of 1 200 cases of malaria per year in the United States for the last six years

Malaria can cause brain damage and is fatal in 10 percent to 50 pershycent of the cases What intrigues me is that we are as happens when societies become irrational workshying at cross-purposes

Environmentalists want to preshyserve swamps and create more They now call them wetlands and they are sacred They are also the places where mosquitoes breed not only those which are carriers of malaria but also those which carry yellow fever (you really dont want old yellow jack to come back) denshygue or breakbone fevermiddot and enshycephalitis

Environmentalists also don t want to spray pesticides But it was the draining of swamps and the spraying of pesticides that ended the terrible toll malaria once exshyacted from Americans

Maybe it would not matter exshycept for global trade immigration illegal immigration tourism and all of the above aggravated by jet travel

People can go somewhere pick up an infection and fly back home long before the symptoms show up People can arrive here full of infecshytion without showing symptoms

Doggone those unintended conshysequences

I dont often look into my crystal ball (its mainly a paperweight) but if I were going to make a long-term bet Id bet that environmental exshytremism is about at the end of its run

Let a few hundred voters die from malaria and I suspect the politicians will suddenly look quite differently on the alleged value of swamps and a no-pesticide policy

Imagine a mini-epidemic of mashylaria or breakbone fever in a major tourist area

Given the number of internashytional visitors and illegal immigrants who do the menial jobs such an epidemic is not that far-fetched

I live in such an area and I can tell you that the murder of just one foreign tourist gives the chamber of commerce the hoteliers the atshytraction owners and even the govshyernor one giant-sized migraine

Imagine what a migraine if 300 or 400 tourists ended up in a hosshypital with a contagious tropical disshyease It would not as they say in flack world be good publicity

It would in fact be terrible pubshylicity because a prospective tourist might reason correctly that the odds of getting shot are slim but the odds of getting bitten by a mosquito during a mostly outdoor vacation are considerably higher They would stay away

continued on page 13

continued from page 8 sensitivity to disturbance and the afshyfinity of Culex erythrothoraxlarvae for vegetation make sampling by dipper very difficult and unreliable

[ Bloodfee~fng middot__ middot_ _ J

Culex erythrothorax is an opporshytunistic feeder which shows a disshytinct east-west cline in feeding prefshyerences In the eastern part of its range individuals collected near Salt Lake City were found to feed primarily on birds In southeastern California engorged individuals were found to feed equally on birds and mammals In much of central and southern California blooded females fed primarily (about 90 of identifiable blood meals) on mammals Rabbits cattle dogs and humans are among the most commonly utilized mammalian hosts

middot middot s~rvival- and middot _ Dispersat ~~ middot

Comparatively good survival of adult females and limited dispersal tendencies are two important facshytors causing large host-seeking populations to develop in the vicinshyity of bulrush marshes At well esshytablished wetlands in southern Calishyfornia it is not uncommon to colshylect between 10000 and 33000 females per C0

2-baited trap per

night during the summer Female survivorship is typically higher than for other co-occuring congeners Compared to other Culex species host-seeking Culex erythrothorax females typically disperse short disshytances Host seeking females are rarely collected more than 2 to 25 kilometers from developmental

sites However local wind condishytions and the availability of hosts may cause large numbers to disshyperse distances greater than 25 km (15 miles) from natal sites The anthropophily of this species could make Culex erythrothorax a distinct pest of humans residing near wetshylands

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middotmiddot

gt -_middot~Nmiddotews-middot y middotOU Calt middotuse-~ -~-middot-- middot_ middot middot - bull 7 bull bull ~ bull -

Position middot Announcement

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12 Fa111997

- middotmiddot-

-middot -

- - ~

Meetings of Interest

FMCA Annual Fall Meeting November 16-20 1997

1997 Annual Fall Meeting of the Florida Mosquito Control Associashytion Radison Ponce de Leon Reshysort in St Augustine FL

For more information contact Shelly Redovan PO Box 60837 Fort Myers FL 33906-0837 Tel (941) 694-2174 Fax (941) 694-6959

Entomological Society of America Annual Meeting December 13-18 1997 Nashville TN

Contact (301) 731-4535 or e-mail meetentosocorg

Info is available on the web at httpwwwentosocorg

MVCAC Annual Conference January 25-28 1998

661h Annual Mosquito and Vecshytor Control Association of Califorshynia Conference Tenaya Lodge Fish Camp California

Contact Don Eliason at Tel (916) 685-2600 Fax (916) 685-1768 e-mail movcacaolcom

WCMVCA Annual Meeting February 19-201998

West Central Mosquito and Vecshytor Control Association meeting at the Grand Vista Hotel in Grand Junction CO

Contact Wayne Kramer at (402)471-0506 for more informashytion

AMCA Annual Meeting March 8-12 1998 John Ascuagas The Nuggett

(800)648-1177 in Sparks Nevada

Contact AMCA Central Office (318) 47 4-2723 for more informashytion

North American Conference on Pesticide Spray Drift Management March 29-April 1 1998 Holiday Inn by the Bay Portland Maine

For further information contact Jim Dill UMCE Pest Management Office 491 College Ave Orono ME 04473-1295 Tel (207) 581-3880 Fax (207) 581-3881

Visit their Web Site at httpwwwstatelleus

agriculturedrift1htm

continued from page 10 All Im suggesting is that we have

put up with extremists and village idiots long enough and wed better settle back into down-to-earth realshyistic work in the fields of public health public safety and governshyment in general Weve allowed the inmates to run the asylum long enough Now its time for a return to normal behavior normal actions and sensible science

Daffy ideas and ideology notshywithstanding if you play around with nature it will kill you -~

~charley Ree~e i$ ~ middot synCti middot -cated columnist with the _ Orla~dQ _Sentinel lie _can ~e reached __ by email at middot -

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Charlie Reeses August 14th colshyumn proclaims that the preservashytion of wetlands and the reduction of pesticide spraying near these areas will in the near futu re lead to many cases of malaria and other diseases He states that this is environmental extremism and not realistic

Unfortuntely his sensible scishyence lacks the support of actual facts For instance the 1 200 cases of malaria per year in the United States for the past six years are almost all imported cases conshytracted in other countries where conditions are more conducive to transmission Only a handful of malaria cases transmitted within the states have been recorded within the last 40 years Although the draining of swamps and spraying of pesticides did play a role in the reduction of malaria in Florida they were only a portion of the solution Window and door screenings coupled with the spread of air conshyditioning throughout Florida played a large role in keeping mosquitoes out of houses where pesticides couldnt reach

Furthermore the mosquitoes that transmit yellow fever and dengue do not breed in swamps but in small containers (such as flower pots and rain gutters) scattered thoughout every neighborhood Pesticides are often ineffectual against these urban mosquitoes So window screening again played a major role in reducing these two diseases in Florida

Although wetlands are the known breeding grounds for many mosquitoes manipulated wetlands such as rice fields in Texas orange groves cattle pastures and cane fields in Florida actually pose a much larger threat to people in

terms of producing large numbers of disease vectors The alleged value of swamps that Mr Reese mentions lies in the functions of rain and stormwater collection and disshypersal Without such wetlands rain must go somewhere and many low-lying agricultural areas such as rice fields and orange groves turn into mosquito breeding grounds

Draining swamps and spraying pesticides are not a magic bullet for mosquito and disease control Reliance on these methods alone has taught mosquito control and health officials harsh lessons Mosshyquitoes and the diseases they spread have complicated life cycles which can intertwine with our own socioeconomic cycles

Mr Reese should contact the village idiots and extremist who work daily in mosqito control to learn the facts The difficult task of controlling mosquitoes in Florida is an ongoing challenge We have learned from others that have failed to utilize multiple control methods and relied too heavily upon one method

Pesticide resistance of malarial mosquitoes presents a real danger to public health For example the over-use of DDT for malaria conshytrol as well as crop protection in Sri Lanka failed to prevent the disease and resulted in over 400000 cases of malaria in 1975 Cotton farmers in El Salvador and Guatemala have been drenching their fields with every known insecticide These actions have produced malaria mosquitoes resistant to all chemishycals Mr Reese is right on one count If you fool around with nashyture it can kill you

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Most modern mosquito control operations include larviciding as an integral part of their pest manageshyment practices Mosquito larvicides are available in a wide range of types and formulations Dry formushylations include briquets granules and pellets

Formulations usually are applied directly out of the container genershyally with no need for mixing Some sand formulations may be made on site by following instructions proshyvided on the labels There is usushyally a range of rates for each forshymulation to cover different habitats and water quality depth movement and organic content plus other facshytors discussed on product labels

Selecting the formulation and application rate that gives you the best coverage for your larval habishytats requires some thought Dryshyformulated larvicides may be apshyplied by hand with ground equipshyment and by air In this article we focus on ground applications and calibration as we have in the previshyous two articles in this series

Calibration is an encompassing principal that includes

1 determining what insecticide formulation to use

2 the rate of toxicant per acre to apply

3 the total spray volume needed to use to get good coverage

4 determining (or setting) the flow through the nozzle

5 determining the effective swath width and if appropriate the walking pace of application

14 Fall1997

After these parameters are set the applicators should practice by spraying a measured area against the clock Through practice the applicator will develop visual cues and hand-eye coordination which leads to standardizing hisher covshyerage per minute These factors apply to granular blowers horn seeders and other dry formula apshyplication tools including aerial spreaders

Choosing The Formulation

The three active ingredients most commonly used in dry larvishycide formulations are temephos sshymethoprene and delta-endotoxin (Bti) All three may be mixed with plaster (eg Altosid Briquetsreg Altosid XR Briquetsreg Altosid Pelshyletsreg and 5 Skeeter Abatereg) with food substances (Bactimos Pelshyletsreg) or with cork (Bactimos Brishyquetsreg) They also may be attached to ground-up corncob (eg Vectobac Greg and Vectobac CGreg) paper pulp waste material (eg Abadac which is liquid Abate plus Biodacreg Aitodac which is Altosid Liquid Larvicidereg plus Biodac) or sand (eg 1 Skeeter Abatereg LarvXSGreg and Aitosand which is Altosid Liquid Larvicide plus sand) Briquets generally are designed for use at rates ranging from 1 per 200 square feet (218 per acre) to 1 per 25 square feet (1742 per acre) A typical application rate is 1 per 1 00 square feet (436 per acre) in many situations Some granular products may be applied at up to 20 lbs per

acre but applicators typically used 5-10 lbs per acre

Briquets and pellets slowly reshylease toxicants to provide sustained control for one or more months The Bti toxicants are stomach poisons which must be placed in that part of the water column where the tarshyget larvae feed S-methoprene and temephos are contact poisons which mix with the entire water column Bactimos Briquets which float are primarily a mixture of Bti and cork and are often staked in place to prevent their being moved by wind waves and animals Altosid Briquets Altosid XR Brishyquets Altosid Pellets and Skeeter Abate Pelletsreg are made with plasshyter and sink to the bottom Some mosquito control agencies place briquets in fine wire mesh baskets and suspend them in storm drains just above the bottom so they are not swept away or buried Sand formulations also sink but a new Bti formulation LarvXsg is coated with vermiculite which reshyleases and carries the Bti back to the surface from which it is reshyleased Some Bti corncob granshyules in each bag will float while othshyers may sink This is also true for formulations using Biodac as a carshyrier

Briquets are most commonly dispensed by hand but Clarke Equipment Companys Arrow Gunreg is sometimes used to broadcast Altosid Briquets but not Bactimos Briquets The Arrow Gun uses compressed air captured from a non-thermal ULV aerosol generashytor to propel briquets down its barshyrel It may be used for lobbing one

or a few briquets into isolated small pools where placement is not a critishycal issue both in terms of cost and eHiciency Applicators may also use a slingshot The Arrow Gun works very well for applying pellet ground corn cob and other granushylar carrier formulations in large amounts In order for the equipment to be used properly as with any application equipment it must first be calibrated

Figure 1 shows release rates for Altosid Briquets Altosid XR Brishyquets and Altosid Pellets These curves are adapted from an article by Dr Doug Ross et a called Methoprene concentrations in freshwater microcosms treated with sustained-release Altosid formulashytions (Mosquito News 1994 Vol 1 0(2 pt 1 pp 202-21 0 They are indirect measures of release rates derived by measuring the concenshytration of active ingredients in the water Notice that the AI is not reshyleased uniformly throughout the active life of the formulations Conshysider this when you are larviciding We suspect that most solid larvishycides have characteristic release rate curves but we are not aware of any published descriptions If we could tap into the EPAs confidenshytial data files we might be able to find out more about this topic

In a large rectangular area usshying a 1 briquet1 00 sq ft applicashytion rate if briquets are placed in the recommended 1 0 foot intervals in even rows the maximum (diagoshynal) distance between two adjacent briquets is a little over 14 feet Imagshyine a square with a briquet in each corner and mosquito larvae in the center a little over 7 ft from each briquet To decrease the maximum diagonal distance between briquets to 1 0 feet while still placing briquets every 10 feet in rows stagger the rows so the briquets in the second row are between the briquets in the first row Materials science tells us this is the most efficient spacing scheme We recommend practic-

ing briquet placement in a mowed yard prior to actual field work This will allow you to get your spacing right Monroe County (Florida) Mosquito Control District field pershysonnel typically hand-apply over 20000 Altosid Briquets every year by walking their breeding sites with a 2 gallon pail full of product

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Another problematic situation occurs when treating a narrow ditch If a ditch averages 8 feet wide you would apply a briquet every 125 linear feet to get the 1 briquet per 1 00 sq feet If the ditch averaged 2 feet wide you would apply one briquet for every 50 linshyear feet In the case of a narrow ditch and in the absence of any external mixing forces such as wind or water flow the concentrashytion will be higher than expected adjacent to the briquet because the toxicants cannot disperse equal distances in all directions In addition the concentration of AI at the center point between adjacent briquets may be below the lethal dose Exposure of mosquito larvae to sublethal doses may result in resistance to the AI If the water is flowing the problem is solved but you may get accelerated briquet erosion Altosid Briquet labels provide instructions for treatshyments in moving water

East Volusia Mosquito Control District (Florida) developed a method to apply a whole seasons worth of Altosid (30-day) Briquets

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DAYS AFTER APPLICATION

Figure 1

Release rates for Altosid Briquets altosid XR Briquits and Altosid Pellets

Fall1997 15

at one time They cap a 6-8 inch section of 1-inch ID PVC pipe atshytach this (cap-side up) to an alumishynum stake (packing tape works great) and drill a 38 inch hole through it at the other end Brishyquets are inserted into the cylinder sometimes with color coded poker chips as spacers and a wire is run through the hole (or the stake is bent inward) to prevent the briquets from falling out prematurely The stake is driven into the bottom at the breeding site As the breeding site is flooded the bottom briquet erodes away releasing AI Trapped air prevents water from reaching the other briquets Another briquet falls down to take its place when it is about gone A field inspector can count poker chips to see how many Altosid Briquets have been used up

When bottom contours are highly irregular and the water depth is shallow and decreasing you may

not want to use briquet formulations at all Consider whether or not the briquet will ever be isolated from any part of the intended treatment area during its active life If so larshyvae may escape control efforts The amount of carrier material used can dictate the quality of control you achieve and is a very important consideration Unless we formulate our own pesticides we must work with a fixed amount of toxicant per pound as determined b~middot the manushyfacturer for an average situation Wouldnt it be nice to have a series of dry formulations based on the same AI that best fit different situashytions

Consider Figure 2 for a moment It shows the approximate average number of particles per square yard for four different carriers This graph is the result of investigations by students attending the weekshylong Florida Mosquito Control Asshysociation Dodd Short Courses on

Larviciding during 1996 and 1997 plus the work of Pasco CMCDs John Schaediger who washed and counted thousands of grains of sand Notice that 6 pounds of Biodac1200 contain about the same number of particles as 1 0 lbs of 1 014 grit corn cob If you have determined that 1 0 lbs of Vectobac CG (which uses 1 014 grit corn cob) is the correct application rate for you then perhaps 6 pounds of Biodac 1200 formulated with the same amount of Bti will do the same job and save you 40 in weight At these rates they both contain approximately the same number of carrier particles per pound The weight difference could increase the economics of aerial application where the lower weight translates into more acres per payshyload per flight

We apply 75 lbs of granulated 1 014 grit corncob per acre as our base rate This includes both in-

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house mixes of blank granules with active ingredients and commercially finished products The 75 lbs is not just a figure that has been pulled out of the sky but one that many trials and observations have shown to be necessary to get good coverage with a variety of bottom contours and vegetation types You may need a different base rate When field personnel are conshyfronted with heavy detritus or vegshyetation aggregated larvae or a preponderance of late in star larvae they can then increase their applishycation by slowing down their pace or narrowing the swath to raise the dosage of pesticide (remembering to stay within the maximum labeled rate)

Whatever the formulation the proper application is critical to the efficiency and effectiveness of your program Larvicide labels comshymonly include only very general guidelines for application techshyniques or equipment selection This latitude allows applicators and technical staffs to choose a system that works best for their circumshystances A granular label notes the material should be applied unishyformly in conventional aerial and ground equipment

Equipment Calibration

Equipment calibrations are imshyportant for the effectiveness of your operation Consistency is born out of practice on top of more practice Failures of larvicides are often atshytributed to missed areas caused by poor applications Calibrating flows on dry application equipment is done either by timing how long it takes for a known amount to pass through the unit or by collecting all the material blown from the nozzle for a fixed period of time and then weighing it Either should be done by two people one that handles the machine and one that does the timshying The collection method retains

the material for subsequent tests but may restrict the flow on certain machines Machines with powershyful air blasts can only be checked by timing the discharge of a known quantity

Knowledge of the flow rate and of factors affecting it are critical to calibration The most common powshyered ground equipment used for dry applications is the gasolineshyengined backpack mistblower duster The units are capable of providing even coverage good throw and are simple to use They typically broadcast granules in a 40-60 ft swath width with the operator walking at 1-3 miles per hour This translates to 5-20 acres per hour of spray time Several things can be done to change the flow rate with the nozzle orifice or disc as the primary determinate Changing the pressure will also change the flow but to a much lesser degree and it has other side effects Some power dusters have movable grates that regulate flow over the normal opshyerating range Some brands have a series of replaceable orifice discs that allow discharge rate changes in small steps Blower speed also affects the throw but that should have marginal effect on the disshycharge rate

Other ground equipment that may be used include crank slinger seeders horn seeders and modishyfied ULV equipment (eg Arrow Guns mentioned above) The flow of spinning disc spreaders or othshyers with a mechanical agitator may be somewhat affected by the opshyerational speed Horn seeders which have about a 20 ft swath width when applying Bti granules are often used by our field personshynel to treat small sites They have replaced the Dipper and Bucket method where an applicator fills a dipper from a bucket of granules and then carefully and evenly broadcasts them

An Example

Assume you have determined that you can comfortably apply B ti corncob granules in 50ft swaths at 2 mph (121 acreshour) using a duster and you want to apply them at 25 to 10 lbsacre To get proper coverage in typical vegetation you will use 5 lbsacre and when conshyfronted with adverse conditions you may double or in this case with a maximum label rate of 20 lbs acre quadruple the application to get the proper dosage of pesticide to the insect

Fill the hopper with granules making sure not to get any pieces of paper or other debris mixed into the product If the unit is equipped with an air agitation system make sure that it is operational Start the engine and make sure that the granules are free flowing through the nozzle If the unit is equipped with an adjustable gate style regushylator center it for an initial trial Close the flow control For collectshying granules you need a nylon stocking and a scale that measures to ounces or grams Place the stocking over the discharge tube and secure it with a rubber band The stocking should be supported so it wont pinch the air flow off Run the blower up to speed and then open the flow valve as you start timing Have the operator open the valve as the stop watch is started

Because of the very low flows (small quantities) of granules needed take a sample over a given period in the 3-5 minute range Shut the flow off as the timer notes the end of the period Pull the colshylection into the bottom of the stockshying and remove it from the nozzle Place another stocking on the duster and collect a second sample and then a third sample Collect at least three samples weigh each and average the results Be sure to subtract the weight of the stock-

Fall1997 17

ing before calculating the average If one sample volume is much higher or lower than the other two samples then replace the odd sample with a new one Assume you collected three 5-minute samples that weigh 61 64 and 59 oz each The average is 61 3 oz5 min or 1227 ozmin

Practice

Swath tests are best done inishytially using a paved surface such as a parking lot for a practice spray plot because the granules are easshyily seen Blank granules for pracshytice and for your own formulating may be purchased from The Andersons (800-537-3370) and other sources Get 1014 grit if you use Vectobac CG or an equivalent and 58 grit if you use Vectobac G or an equivalent Fill the hopper with a weighed quantity of granules and walk over the plot trying to cover the entire area with an even dosage To determine how much was applied empty the hopper and weigh the material remaining Afshyter a good distribution has been

mast~red move onto a measured field where the terrain is more diffishycult and continue practicing Proshygressively move into more difficult areas as your skill level increases You can get to the point where you know what 5 lbsacre looks like in any habitat and then when you apshyply the real stuff you will know you have done so properly

Assume your practice spray plot is 18 of an acre Therefore to get the proper dose you want to apply 18 of 5 lbs (0625 lbs or 10 oz) to the plot You earlier calculated that your duster is putting out approxishymately 1225 oz per min The calshyculated time to put out the 1 0 oz required to treat the test plot is 082 minutes or49 seconds [determined by dividing 10 ounces by 1225] You also determined that you can treat 121 acreshour at a 2 mph walking speed At that speed you can treat about 16 of an acre in 49 seconds You have three choices to adequately cover your 18 acre practice plot 1) You can walk at your normal speed and apply at a rate slightly higher than 5 lbsacre 2) you can walk a little slower and

BVA

apply at the normal rate or 3) you can decrease the flow rate a bit to achieve the target rate at your norshymal application speed The choice is yours

If you have any questions feel free to contact the authors at Pasco County Mosquito Control District 2308 Marathon Road Odessa Fl 33556 Phone 813-376-4568 Fax 813-376-470 Email pcmcdgtenet

~

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In order to control or eradicate vector-borne disease the world Health Organization launched a substantial program of research on the screening evaluation and deshyvelopment of pesticides for the conshytrol of disease vectors and human pests in the early 1960s This proshygram of research and development continued into the 1970s Various collaboration centers and WHO regional research laboratories were involved in this multiphasic evaluashytion and research program This program was later designated as WHO-PES (WHO Pesticides Evaluation Scheme) which inshycluded laboratory screening of new pesticides and their formulations and finally small-scale and largeshyscale village field trials where effishycacy safety and feasibility of applishycation were studied Additionally whenever possible impact on the level of endemic diseases was also assessed The 41

h phase of this scheme addressed specification of pesticides and their formulations to be used in vector control

The WHO-PES program evenshytually came to a halt in the eighties and with restructuring of the vector Biology and Control Division in WHO this program came to a grinding halt It soon became apshyparent that member countries carshyrying on substantial vector control programs especially mosquito conshytrol operations soon reached the stage when appropriate tools and strategies for use in operational programs became quite scarce Member countries put forward deshymands for the development of more effective and safer chemical and

20 Fa111997

biological control measures To reshyspond to this global demand the Division of Control of Tropical Disshyeases (CTD) at WHO reinvigorated the WHO-PES Program by holding an informal consultation on the Evaluation and Testing of Insectishycides on October 1996 where I was asked to serve as the Chairperson of the consultation Copies of the report of this Consultation can be obtained from Dr Zaim Morteza whose address appears at the end of this article

As a result of the Informal Conshysultation and other discussions held at WHO regarding the future need for public health pesticides CTD recently (1996) launched the GCDPP program This is indeed a crucial program which requires colshylaboration among national and inshyternational agencies research inshystitutions industry and regulatory agencies The main objectives elshyements and scope of this program are briefly discussed below

The main objectives of the GCDPP program are

bull To facilitate the search for alternative pesticides including mishycrobial pesticides as well as applishycation methodologies

bull To advise on the relative priority of activities within the manshydate of GCDPP

bull To advise on issues related to the development and use of pesshyticides and application equipment within the context of WHOs global disease control strategies

bull To promote harmonization of activities related to pesticide deshyvelopment and safe use

bull To promote and encourage the highest quality of work through appropriate resource mobilization

bull GCDPP will serve as an advisory group to CTDWHOPES in matters of pesticide developshyment safe and proper use and apshyplication equipment

Membership and Meetings

A number of agencies organishyzations and manufacturers of pesshyticides and application equipment will become members of GCDPP as well as foundations and WHO Collaborating Centers Other groups and -organizations involved in manufacturing pest manageshyment and crop protection will also be invited Attempts will be made to maximize representation but at the same time ensure appropriate balance In addition to the above distinguished scientists and direcshytors of WHO Regional Offices may also be invited to attend the meetshyings of GCDPP

GCDPP will provide a forum for the exchange of technical informashytion and oversee the WHO-PES biennial plan and collaboration with other organizations and institutions GCDPP will meet every other year in Geneva Switzerland Informal consultation meetings on specific topics will be convened as the need arises CTD will be responsible for the organization of such meetings

continued on page 25

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How many of you know the names Norma Jean Baker Cornelius Magillicutty dichloroshydiphenyl-trichloro-ethane Haliaeetus leucocephalus and its distant relative Taxodium distichum How about Aedes albopictus Well if you are willing to bet $100 you know all six withshyout looking at the answers then you are either very bright very old well read or have too much time on your hands If you know only one I hope its the Asian tiger mosquito What if for the remaining five I gave you the hints of Some Like it Hot baseball legend insecticide whiteshyheaded bird and tree with knees The older ones amongst us and thats getting to be a higher percentshyage each year should recognize Marilyn Monroe and Connie Mack for the first two All of you should be ashamed of yourself if you dont recognized DDT The last two reshylated by name only are Bald Eagle and Bald Cypress If you got both of those you are probably psychic and also know what the point of this article is

And what is the point of this arshyticle the need for common names for mosquitoes Most of us know the birds plants and mammals by their common names Why then must we for the most part use scishyentific names for mosquitoes There are other names that would be more meaningful easier to spell and certainly easier to pronounce Ill bet my $100 right now that 50 of us couldnt spell Toxorhynchites or taeniorhynchus in a spelling bee Thank goodness Aedes abopictus had a catchy common name when

- bull bull -middot ~ bull middot- ~ bull ~ bull

it became established in the US in 1985 Never mind that the common name conjured up all sorts of wrong impressions Asian tiger mosquito was a lot easier for the public and press and I dare say most mosshyquito control practitioners to undershystand and remember Also our friends at the Entomological Socishyety had the accepted common name as Forest Day mosquito but to their credit they changed it to what every one calls it the Asian tiger mosquito

So despite their scientific bent scientists can be influenced to change their minds If common names and abbreviations too didnt have a purpose that is to help us to communicate then we would all be saying too many long boring and confusing sentences Consider the following For years Cornelius Magillicutty sprayed his back yard with dichloro-diphenylshytrichloro-ethane for Aedes abopictus and then years later with Norma Jean Baker at his side watched the thin-shelled eggs of Haliaeetus leucocephalus drop out of 500-year old Taxodium distichum that he loved so much Yawn

Its that kind of phraseology that keeps people including some scishyentists from reading the scientific literature When trying to commushynicate any word or phrase that your listener doesnt know or understand tends to confuse them annoy them or make them feel inferior and that often makes them stop listening Communicating with the public has become a major mosquito control activity in recent years When com-

municating with the public scientific terms and jargon are neither desirshyable or necessary Mosquito control activities can be explained in very simple terms We could use the term Bacillus thuringiensis var israeensis instead of BTl but how many of us do Telling the average person SLE is an arbovirus doesnt give them any more information than telling them its a virus

And whats with this italics stuff for scientific names Ask people (inshycluding you perhaps) why we italishycize scientific names and most will probably guess that its to emphashysis the term Wrong If you care why look it up Lets forget it from now on OK If you cant write Culex quinquefasciatus without italics then consider my alternative-comshymon names that dont need to be italicized

The Entomological Society of America has a committee that conshysiders and usually rejects proshyposed official common names for insects There are only 14 mosshyquitoes on that list and I dare say most of us dont use most of them The problem with this list is that it was developed by scientists and everyone knows that all scientists are mad not just those in the movshyies Scientists want to do things in a scientific manner-logical meshythodical and precise Just because the entomological journals will only let you use accepted common names in their pages doesnt mean we cant use other common names in presentations and io print and we should

Fall1997 23

What we need is a list of comshymon names that the average mosshyquito control practitioner uses No one that anyone takes seriously will say they found some Culex pipiens quinquefasciatus (note no italics) in a polluted pond Most will say quinks Sure we can capitalize Quinks if it makes you feel better it does me So why are we afraid to write Quinks in our reports or say Quinks in formal talks Most people probably dont say quinks (see I dont insist on capitalization) because they think it makes them sound unprofessional Quinks is a distinctive short easy to rememshyber and fun to say name it has a beat that you can dance to and I give it a 99 Does anyone you know call quinks the southern house mosquito the accepted common name How about northern house mosquito for pipiens

Taenies or taenys or whatshyever spelling you want to use is easily recognized by east and south coast mosquito people as the comshymon name for Aedes taeniorhynchus one of the saltmarsh mosquitoes Again its a distinctive short easy to rememshyber and fun name It also describes the size of the species somewhat small or teeny-a bonus And who doesnt use Tox as the common name for our other spelling bee example

We dont hesitate to use comshymon names for a group of mosquishytoes that breed in a particular habishytat In addition to saltmarsh mosshyquitoes we refer to floodwater mosquitoes (which incidently also describes many saltmarsh mosquishytoes) tree hole mosquitoes dirty water mosquitoes grey water mosshyquitoes freshwater mosquitoes container-breeding mosquitoes pasture mosquitoes rock hole mosshyquitoes crab hole mosquitoes and on and on These habitat names are not mutually exclusive For exshyample pasture mosquitoes are also floodwater mosquitoes and fresh-

24 Fall1997

water mosquitoes By the way the translation of floodwater mosquito according to the Entomological Soshyciety is Aedes sticticus What Habitat names are also convenient for discussions among people from different geographic areas For example nature tends to give the same qualities to mosquitoes that breed in tree holes regardless of whether they are tree holes in Calishyfornia Virginia Queensland or Borneo From an operational mosshyquito control standpoint knowing the habitat of the mosquito can be more informative than knowing its scientific name

So lets consider some common names of species that we might use One common pest and potenshytial vector species that needs a common name is Coquillettidia perturbans (I think Ive weaned myself from italics) the aggressive biter whose larvae attach to the roots of aquatic plants particularly cattails (I could have said Typha species) Cattail mosquito is a natural even though larvae may attach to a variety of plants Another name could be the salt and pepshyper mosquito or another name taken from its scientific name could be the perturbing mosquito

How about the Anopheles The accepted common name for Anopheles quadrimaculatus is the common malaria mosquito This may have been accurate when malaria was a problem in this counshytry but now neither malaria nor this mosquito is common in this counshytry Im sure most of our hypothetishycal naming committee made up of operational mosquito controllers would call them quads

We have already dealt with Quinks Another obvious common name for another Culex Cx salinarius is sally or sallys or sallies Culex restuans is a little more tricky but how about rusty Rusty is suggestive of the color of the mosquito and it is similar to

resty a name that just doesnt sound right to me

Aedes vexans a common floodshywater mosquito in much of the US needs a common name The acshycepted common name vexans mosquito would be OK if most people know what vexing means And if they do why not call it the vexing mosquito Calling Aedes aegypti in the US by its accepted name the yellowfever mosquito is misleading Yellow fever has been absent from the US since right after the turn of the century Aegypti or gyps is often used by field and lab workers so why not adopt those terms

I could go on and on but Im more interested in what you think If you will send me your common names (keep it clean please) for any species you are familiar with Ill be happy to compile them and report back in a future article in Wing Beats (Theres that italics again different reason) If they appear in Wing Beats maybe just maybe we can call them official common names You can fax me at 561-778-7204 or E-mail me at cdmognvifas ufledu By the way you can address the message to Charlie Chas or Char The only person I insist call me doctor is my ex-wife and I would rather she didnt call me at all

-C_h~ulie M~rtis middot is an Assoshy _ciate middotPi~fesso( at the Unishy versity ~f floridas Medical Eiitomology Laboratory middot hi middot middot

Verq Beach Fiorida~

continued from page 20

providing support for report prepashyration and other documents and perform secretarial functions

Funding

In order to advance the objecshytives of GCDPP a stable source of funding will be necessary WHO CTD (WHO-Division of Control of Tropical Diseases) will establish and administer a trust fund which will be designated as GCDPP-Trust Fund which will be administered according to the WHO financial rules regulations and practices

The trust fund will be used to convene meetings production and dissemination of documents exshychange and dissemination of inforshymation on the need for public health pesticides and equipment and for activities which will promote the development and use of alternative safe compounds or application equipment

1James of organizations institushytions foundations manufacturers and individuals participating and contributing to this program will be listed Each participant will be enshycouraged to make annual contribushytions to the trust fund

Further Information

For further information on WHOshyPES or GCDPP contact Dr Zaim Morteza WHO-PES CTD World Health Organ ization 1211 Geneva 27 Switzerland E-mail zaimmwhoch

Nlir smiddotMulla is a Profes-sor with the Deparfrilent of ~nt-oshy_mologyUniverslty at califor middot -nia Riversidemiddot CA92521 middot _ middot middot

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Recognition Awar(j _

Mir S Mulla Professor of Entoshymology Department of Entomolshyogy University of California Rivershyside CA was presented the Scishyence Society of Thailand~ Meritoshyrious Recognition Award by the Thailand Minister of Science and Technology last October

Mulla an authority on insects of medical and public health imporshytance was cited for his efforts and leadership in organizing the First International Symposium on Biopesticides convened at Naresuan University in Thailand This symposium attended by some 300 participants from 20 countries covered biodiversity safety toxicshyity efficacy and proper use of biopesticides based on natural products and pathogenic organshyisms The proceedings of this first symposium amounting to 300 pages will be published soon

Mulla informs us that the 2nd International Symposium on Biopesticides will be held in late October 1998 on Langkawi Island off the coast of Malaysia Anyone interested in receiving further inforshymation regarding the proceedings or the second symposium should contact Dr Mulla at tel (909) 787-5818 fax (909) 787-4210 and eshymail mulla mailucredu

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Fall1997 25

Notice Psotophora middotgtcyaneseens collect~d middotin Aiachua County FL

- ~

and 9 pupae of this species were collected by the author from a sunshylit small (ca 2 m diam and 20 em deep) grass-lined pool filled with rainwater at Gainesville Florida

a common identification number with their 41h instar larval and pupal exuviae On subsequent visits to the site no additional Ps cyanescens were collected

Psorophora cyanescens (Coquillett) previously has been reported in Florida from the followshying counties Bay Duval Escambia Gadsden Hillsborough Jackson Leon Okaloosa Suwannee and Union (HT Evans Florida Mosquito Control Handbook 1994) On 26 May 1997 one 4h instar larva

Also collected from the pool were numerous larvae and pupae of Psorophora columbiae (Dyar and Knab) Aedes vexans (Meigen) and Culex salinarius Coquillett and 17 4h instar larvae of Psorophora ciliata (Fabricus) All immatures were individually reared and the resulting adults were linked by

John -Fmiddotmiddoteeinert is with Jlie CeMte(for Medicental middotAgricultural

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REGISTRATION FOR WORLD DIRECTORY OF ARTHROPOD VECTOR RESEARCH AND CONTROL SPECIALISTS

In order to update the Directory we would appreciate your completing this form Please type or print and return it to the address listed below We would also appreciate your copying this form and supplyshying it to any colleagues who are working in this field Your cooperation will allow greater communication and efficiency within our profession

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Please return by Air Mail to Dr Eugene Gerberg Chairman AMCA International Affairs Committee 5819 NW 57th Way Gainesville FL 32653-3257 USA

Fall1997

Date completed

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Page 4: Wing Beats Volume 8 Number 3wingbeats.floridamosquito.org/Wingbeats/pdfs/Vol8No3.pdf · 2014. 4. 11. · Stan Cope, Norfolk, VA Betsy Field, Vero Beach, FL John Gamble, New Smyrna

continued from page 4

The topics are largely detershymined by the subscribers

To subscribe to Entomo-L send your e-mail to LJSTSER listserv uoguelph ca with a blank subject line and the following message in the body Subscribe Entomo-L John Doe where John Doe is your real name You will receive a confirmation of being added to the list by return eshymail Peter reports that there are currently over 1200 members

To send a message to all subshyscribers send your mail to EntomoshyL listservuoguelphca To send inquires to the moderator send your e-mail t~ LISTSERV listserv uoguelph ca There is no charge for Entomo-L and it is not case sensitive Howshyever unlike the other lists there is a variety of subscription options for Entomo-L To determine which is right for you send e-mail to LISTSERVJistservuoguelphca with QUERY Entomo-L in the body Youll receive a posting of the options available by return e-mail

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6 Falll997

More useful Internet Web sites

Listservuacsc 2albanyedu BEE-L - a discussion group for

bee RampD To subscribe send e-mail to the address above and Subshyscribe John Doe in the body of the message

Listserv lehighedu Lymenet-L - Lyme disease

newsletter to subscribe send eshymail to the above address with Subscribe LYMENET John Doe in the body

MosquitoNet A dial-in bulletin board for Calishy

fornia mosquito control workers maintained by Bruce F Eldridge at UC-Davis To access Mosquito Net dial 916-752-5484 There is no charge (other than phone charges) for the service You will open an account for information purposes

httpwwwfamuedujamsarl indexhtml

- John A Mulrennan Sr Arthroshypod Research Laboratory Fla AampM University - Our homepage where several other links are possible to other useful Web sites

httpwwwmosquitoorg American Mosquito Control Asshy

sociation

httpwwwumaaorg Utah Mosquito Abatement Assoshy

ciation

httpwww-rcirutgersedu -insectsnjmcahtm

New Jersey Mosquito Control Association

httpwwwnwmvcaorg Northwest Mosquito amp Vector

Control Association

httpwwwfamuedujamsrl fmcaindexhtml

Florida Mosquito Control Asso-ciation middot

http wwwuwyoed uag psiscJockwoodllinklisthtm

List of entomology sites

httpwwwentiastateedu ListEiectronic_Publicationhtml List of (more) entomology sites

httpgvnifasufledu -entwebentomolohtm

University of Florida Department of Entomology and 1Jematology Home Page

There are many more Internet sites of an entomological nature You may want to conduct your own search by trying one of the followshying search engines

Yahoo at httpsearch yahoo com

Excite at httpwwwexcitecom

Hotbot at httpwwwhotbotcom

WebCrawler at httplwebcrawlercom and

search for entomology andor mosquito

Feel free to e-mail me if you would like to share some web sites Flooret mailfirnedu

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[~middot ~-l_m_p~o_rt_a_n_c~e~_] Culex erythrothorax is a comshy

mon pest near thickly vegetated marshes and backwaters in the western United States This mosshyquito exhibits crepuscular peaks in feeding activity as do other co-ocshycurring Culex species such as Culex tarsalis and Culex quinquefasciatus However unlike its congeners Culex erythrothorax

readily feeds during the day parshyticularly if disturbed from the vegshyetation in and surrounding larval developmental sites Although sevshyeral arboviruses have been isolated from field collected Culex erythrothorax throughout its range in the western United States Culex erythrothorax is thought not to play a significant role in arbovirus (St Louis encephalitis and western equine encephalomyelitis viruses) transmission

8 Fall1997

~itt 3()~~-~~ ot The Tule Mosquito

Culex erythrothorJX

[Geographic Di~tribution J

The geographic range of Culex erythrothorax extends from southshyern Idaho to Mexico Specimens have been collected east of the Rocky Mountains in southeastern Colorado and west of the Southshyern High Plains in west Texas This species is common in freshwater marshes in Nevada in Utah and in the foothill and coastal areas of California The western extent of its range is the Channel Islands off the coast of California middot

[ Adult Descmiddotription

The reddish coloration of the thorax readily distinguishes Culex erythrothorax from its congeners Pale basal markings of the abdomishynal terga and the absence of tarshysal banding can be used to sepashyrate this species from nearly all of the other Culex in California exshycept for the pipiens group Hairshylike scutal scales and the narrow yellowish indistinct abdominal bands readily separate Culex erythrothorax from Culex pipiens and Culex quinquefasciatus

~ middotLarval Description J The long narrow siphon the

distribution of hair tufts on the sishyphon and the morphology of lower head hairs distinguish the later inshystars of Culex erythrothorax larvae from larvae of commonly occurring congeners The length of the sishyphon is six to seven times its basal

width The siphonal hairs consist of more than one branch and the third and fourth pair of hairs on the siphon are inserted laterally The remaining three pair of siphonal hairs are inserted ventrally The nurnber of branches of the lower head hairs (group number 6) is inshytermediate among the Culex found in California

Larval Habitat andmiddot Behavior

Larval developmental sites inshyclude freshwater impoundments seeps and ditches that contain stands of tule (bulrush) and cattail vegetated river margins large pershymanent swamps and man-made wetlands containing considerable vegetation Larvae are typically difshyficult to collect by dipping As comshypared to the relative abundance of adults collected by carbon dioxideshybaited traps and by emergence traps Culex erythrothorax is undershyrepresented in larval surveys Onshygoing studies comparing the beshyhavior of Culex erythrothorax larshyvae to co-occurring congeners (Culex tarsal is and Culex quinquefasciatus) indicate that Culex erythrothorax larvae are much more sensitive to physical disturbance (ie shadows and disshyturbance of the water surface) than are larvae of congeners Other asshypects of larval behavior such as diving pattern aggregation attracshytancy to vertical egges etc of Culex erythrothorax also differ apshypreciably from its congeners The

continued on page 11

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Were back say P vivax and P faciparum two of the little felshylows in the microbe world that cause malaria

More exotic diseases catch the attention of the media and Hollyshywood - Ebola for example which killed about 250 people in six months in the last outbreak in Afshyrica

Heck we kill 5000 Africans a day our little microbe friends say And were coming back to the United States where we once were very common as recently as the 1930s In fact we never left We just dont get our fair share of the media spotlight Liberal press you know

Globally malaria which is spread by a mosquito kills more than 27 million people a year and sickens about a half-billion

People cau go somewhere pick up au iufectiou aud fly back home loug before the symptoms show up

These and other interesting facts are from a well-written piece in the August issue of Atlantic Monthly by Ellen Ruppel Shell You should read it

10 Fall1997

IVly own trusty Statistical Abshystract of the United States shows that there have been an average of 1 200 cases of malaria per year in the United States for the last six years

Malaria can cause brain damage and is fatal in 10 percent to 50 pershycent of the cases What intrigues me is that we are as happens when societies become irrational workshying at cross-purposes

Environmentalists want to preshyserve swamps and create more They now call them wetlands and they are sacred They are also the places where mosquitoes breed not only those which are carriers of malaria but also those which carry yellow fever (you really dont want old yellow jack to come back) denshygue or breakbone fevermiddot and enshycephalitis

Environmentalists also don t want to spray pesticides But it was the draining of swamps and the spraying of pesticides that ended the terrible toll malaria once exshyacted from Americans

Maybe it would not matter exshycept for global trade immigration illegal immigration tourism and all of the above aggravated by jet travel

People can go somewhere pick up an infection and fly back home long before the symptoms show up People can arrive here full of infecshytion without showing symptoms

Doggone those unintended conshysequences

I dont often look into my crystal ball (its mainly a paperweight) but if I were going to make a long-term bet Id bet that environmental exshytremism is about at the end of its run

Let a few hundred voters die from malaria and I suspect the politicians will suddenly look quite differently on the alleged value of swamps and a no-pesticide policy

Imagine a mini-epidemic of mashylaria or breakbone fever in a major tourist area

Given the number of internashytional visitors and illegal immigrants who do the menial jobs such an epidemic is not that far-fetched

I live in such an area and I can tell you that the murder of just one foreign tourist gives the chamber of commerce the hoteliers the atshytraction owners and even the govshyernor one giant-sized migraine

Imagine what a migraine if 300 or 400 tourists ended up in a hosshypital with a contagious tropical disshyease It would not as they say in flack world be good publicity

It would in fact be terrible pubshylicity because a prospective tourist might reason correctly that the odds of getting shot are slim but the odds of getting bitten by a mosquito during a mostly outdoor vacation are considerably higher They would stay away

continued on page 13

continued from page 8 sensitivity to disturbance and the afshyfinity of Culex erythrothoraxlarvae for vegetation make sampling by dipper very difficult and unreliable

[ Bloodfee~fng middot__ middot_ _ J

Culex erythrothorax is an opporshytunistic feeder which shows a disshytinct east-west cline in feeding prefshyerences In the eastern part of its range individuals collected near Salt Lake City were found to feed primarily on birds In southeastern California engorged individuals were found to feed equally on birds and mammals In much of central and southern California blooded females fed primarily (about 90 of identifiable blood meals) on mammals Rabbits cattle dogs and humans are among the most commonly utilized mammalian hosts

middot middot s~rvival- and middot _ Dispersat ~~ middot

Comparatively good survival of adult females and limited dispersal tendencies are two important facshytors causing large host-seeking populations to develop in the vicinshyity of bulrush marshes At well esshytablished wetlands in southern Calishyfornia it is not uncommon to colshylect between 10000 and 33000 females per C0

2-baited trap per

night during the summer Female survivorship is typically higher than for other co-occuring congeners Compared to other Culex species host-seeking Culex erythrothorax females typically disperse short disshytances Host seeking females are rarely collected more than 2 to 25 kilometers from developmental

sites However local wind condishytions and the availability of hosts may cause large numbers to disshyperse distances greater than 25 km (15 miles) from natal sites The anthropophily of this species could make Culex erythrothorax a distinct pest of humans residing near wetshylands

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12 Fa111997

- middotmiddot-

-middot -

- - ~

Meetings of Interest

FMCA Annual Fall Meeting November 16-20 1997

1997 Annual Fall Meeting of the Florida Mosquito Control Associashytion Radison Ponce de Leon Reshysort in St Augustine FL

For more information contact Shelly Redovan PO Box 60837 Fort Myers FL 33906-0837 Tel (941) 694-2174 Fax (941) 694-6959

Entomological Society of America Annual Meeting December 13-18 1997 Nashville TN

Contact (301) 731-4535 or e-mail meetentosocorg

Info is available on the web at httpwwwentosocorg

MVCAC Annual Conference January 25-28 1998

661h Annual Mosquito and Vecshytor Control Association of Califorshynia Conference Tenaya Lodge Fish Camp California

Contact Don Eliason at Tel (916) 685-2600 Fax (916) 685-1768 e-mail movcacaolcom

WCMVCA Annual Meeting February 19-201998

West Central Mosquito and Vecshytor Control Association meeting at the Grand Vista Hotel in Grand Junction CO

Contact Wayne Kramer at (402)471-0506 for more informashytion

AMCA Annual Meeting March 8-12 1998 John Ascuagas The Nuggett

(800)648-1177 in Sparks Nevada

Contact AMCA Central Office (318) 47 4-2723 for more informashytion

North American Conference on Pesticide Spray Drift Management March 29-April 1 1998 Holiday Inn by the Bay Portland Maine

For further information contact Jim Dill UMCE Pest Management Office 491 College Ave Orono ME 04473-1295 Tel (207) 581-3880 Fax (207) 581-3881

Visit their Web Site at httpwwwstatelleus

agriculturedrift1htm

continued from page 10 All Im suggesting is that we have

put up with extremists and village idiots long enough and wed better settle back into down-to-earth realshyistic work in the fields of public health public safety and governshyment in general Weve allowed the inmates to run the asylum long enough Now its time for a return to normal behavior normal actions and sensible science

Daffy ideas and ideology notshywithstanding if you play around with nature it will kill you -~

~charley Ree~e i$ ~ middot synCti middot -cated columnist with the _ Orla~dQ _Sentinel lie _can ~e reached __ by email at middot -

middot - OSOre~se~aol_corn -- middot -~ middot copy 1997~ Klt-_G FEA_TURE middotsvNDICATE-INC-middot

- Editorsmiddot_Vote-Themiddot previ6middotus articent1~ - w$smiddot i ri ~~

eluded-to sHmul~te tllowght middotandmiddot hopefully elicit a -response from our readers middot- Wel i ltludn~i our -editorial procentessmiddot it was brought to my atten-middot tion -f~at a responsemiddot _to this-article had-alreadY be-E3ri submitted to __ the Orlando -sentineL - instead of pub Hshingmiddot this response lnih~ ~next i5sue of WingBeats 1-chose middotto ind~demiddot it akgtrig wi_th tflis articlemiddot -to _provfde another viewpoint wmiddotIJich -rnay h~lp to-correct a few oftlie inaccuracies

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Charlie Reeses August 14th colshyumn proclaims that the preservashytion of wetlands and the reduction of pesticide spraying near these areas will in the near futu re lead to many cases of malaria and other diseases He states that this is environmental extremism and not realistic

Unfortuntely his sensible scishyence lacks the support of actual facts For instance the 1 200 cases of malaria per year in the United States for the past six years are almost all imported cases conshytracted in other countries where conditions are more conducive to transmission Only a handful of malaria cases transmitted within the states have been recorded within the last 40 years Although the draining of swamps and spraying of pesticides did play a role in the reduction of malaria in Florida they were only a portion of the solution Window and door screenings coupled with the spread of air conshyditioning throughout Florida played a large role in keeping mosquitoes out of houses where pesticides couldnt reach

Furthermore the mosquitoes that transmit yellow fever and dengue do not breed in swamps but in small containers (such as flower pots and rain gutters) scattered thoughout every neighborhood Pesticides are often ineffectual against these urban mosquitoes So window screening again played a major role in reducing these two diseases in Florida

Although wetlands are the known breeding grounds for many mosquitoes manipulated wetlands such as rice fields in Texas orange groves cattle pastures and cane fields in Florida actually pose a much larger threat to people in

terms of producing large numbers of disease vectors The alleged value of swamps that Mr Reese mentions lies in the functions of rain and stormwater collection and disshypersal Without such wetlands rain must go somewhere and many low-lying agricultural areas such as rice fields and orange groves turn into mosquito breeding grounds

Draining swamps and spraying pesticides are not a magic bullet for mosquito and disease control Reliance on these methods alone has taught mosquito control and health officials harsh lessons Mosshyquitoes and the diseases they spread have complicated life cycles which can intertwine with our own socioeconomic cycles

Mr Reese should contact the village idiots and extremist who work daily in mosqito control to learn the facts The difficult task of controlling mosquitoes in Florida is an ongoing challenge We have learned from others that have failed to utilize multiple control methods and relied too heavily upon one method

Pesticide resistance of malarial mosquitoes presents a real danger to public health For example the over-use of DDT for malaria conshytrol as well as crop protection in Sri Lanka failed to prevent the disease and resulted in over 400000 cases of malaria in 1975 Cotton farmers in El Salvador and Guatemala have been drenching their fields with every known insecticide These actions have produced malaria mosquitoes resistant to all chemishycals Mr Reese is right on one count If you fool around with nashyture it can kill you

middot- -zach --Prumiddotsa_~ ~Enviroomental middot As$9ciate and Fred Harderi -CQri$Jitan_t_ are with middott_ll_e Reedy middotmiddot Creek lniproverrientDistrict in -

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Most modern mosquito control operations include larviciding as an integral part of their pest manageshyment practices Mosquito larvicides are available in a wide range of types and formulations Dry formushylations include briquets granules and pellets

Formulations usually are applied directly out of the container genershyally with no need for mixing Some sand formulations may be made on site by following instructions proshyvided on the labels There is usushyally a range of rates for each forshymulation to cover different habitats and water quality depth movement and organic content plus other facshytors discussed on product labels

Selecting the formulation and application rate that gives you the best coverage for your larval habishytats requires some thought Dryshyformulated larvicides may be apshyplied by hand with ground equipshyment and by air In this article we focus on ground applications and calibration as we have in the previshyous two articles in this series

Calibration is an encompassing principal that includes

1 determining what insecticide formulation to use

2 the rate of toxicant per acre to apply

3 the total spray volume needed to use to get good coverage

4 determining (or setting) the flow through the nozzle

5 determining the effective swath width and if appropriate the walking pace of application

14 Fall1997

After these parameters are set the applicators should practice by spraying a measured area against the clock Through practice the applicator will develop visual cues and hand-eye coordination which leads to standardizing hisher covshyerage per minute These factors apply to granular blowers horn seeders and other dry formula apshyplication tools including aerial spreaders

Choosing The Formulation

The three active ingredients most commonly used in dry larvishycide formulations are temephos sshymethoprene and delta-endotoxin (Bti) All three may be mixed with plaster (eg Altosid Briquetsreg Altosid XR Briquetsreg Altosid Pelshyletsreg and 5 Skeeter Abatereg) with food substances (Bactimos Pelshyletsreg) or with cork (Bactimos Brishyquetsreg) They also may be attached to ground-up corncob (eg Vectobac Greg and Vectobac CGreg) paper pulp waste material (eg Abadac which is liquid Abate plus Biodacreg Aitodac which is Altosid Liquid Larvicidereg plus Biodac) or sand (eg 1 Skeeter Abatereg LarvXSGreg and Aitosand which is Altosid Liquid Larvicide plus sand) Briquets generally are designed for use at rates ranging from 1 per 200 square feet (218 per acre) to 1 per 25 square feet (1742 per acre) A typical application rate is 1 per 1 00 square feet (436 per acre) in many situations Some granular products may be applied at up to 20 lbs per

acre but applicators typically used 5-10 lbs per acre

Briquets and pellets slowly reshylease toxicants to provide sustained control for one or more months The Bti toxicants are stomach poisons which must be placed in that part of the water column where the tarshyget larvae feed S-methoprene and temephos are contact poisons which mix with the entire water column Bactimos Briquets which float are primarily a mixture of Bti and cork and are often staked in place to prevent their being moved by wind waves and animals Altosid Briquets Altosid XR Brishyquets Altosid Pellets and Skeeter Abate Pelletsreg are made with plasshyter and sink to the bottom Some mosquito control agencies place briquets in fine wire mesh baskets and suspend them in storm drains just above the bottom so they are not swept away or buried Sand formulations also sink but a new Bti formulation LarvXsg is coated with vermiculite which reshyleases and carries the Bti back to the surface from which it is reshyleased Some Bti corncob granshyules in each bag will float while othshyers may sink This is also true for formulations using Biodac as a carshyrier

Briquets are most commonly dispensed by hand but Clarke Equipment Companys Arrow Gunreg is sometimes used to broadcast Altosid Briquets but not Bactimos Briquets The Arrow Gun uses compressed air captured from a non-thermal ULV aerosol generashytor to propel briquets down its barshyrel It may be used for lobbing one

or a few briquets into isolated small pools where placement is not a critishycal issue both in terms of cost and eHiciency Applicators may also use a slingshot The Arrow Gun works very well for applying pellet ground corn cob and other granushylar carrier formulations in large amounts In order for the equipment to be used properly as with any application equipment it must first be calibrated

Figure 1 shows release rates for Altosid Briquets Altosid XR Brishyquets and Altosid Pellets These curves are adapted from an article by Dr Doug Ross et a called Methoprene concentrations in freshwater microcosms treated with sustained-release Altosid formulashytions (Mosquito News 1994 Vol 1 0(2 pt 1 pp 202-21 0 They are indirect measures of release rates derived by measuring the concenshytration of active ingredients in the water Notice that the AI is not reshyleased uniformly throughout the active life of the formulations Conshysider this when you are larviciding We suspect that most solid larvishycides have characteristic release rate curves but we are not aware of any published descriptions If we could tap into the EPAs confidenshytial data files we might be able to find out more about this topic

In a large rectangular area usshying a 1 briquet1 00 sq ft applicashytion rate if briquets are placed in the recommended 1 0 foot intervals in even rows the maximum (diagoshynal) distance between two adjacent briquets is a little over 14 feet Imagshyine a square with a briquet in each corner and mosquito larvae in the center a little over 7 ft from each briquet To decrease the maximum diagonal distance between briquets to 1 0 feet while still placing briquets every 10 feet in rows stagger the rows so the briquets in the second row are between the briquets in the first row Materials science tells us this is the most efficient spacing scheme We recommend practic-

ing briquet placement in a mowed yard prior to actual field work This will allow you to get your spacing right Monroe County (Florida) Mosquito Control District field pershysonnel typically hand-apply over 20000 Altosid Briquets every year by walking their breeding sites with a 2 gallon pail full of product

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Another problematic situation occurs when treating a narrow ditch If a ditch averages 8 feet wide you would apply a briquet every 125 linear feet to get the 1 briquet per 1 00 sq feet If the ditch averaged 2 feet wide you would apply one briquet for every 50 linshyear feet In the case of a narrow ditch and in the absence of any external mixing forces such as wind or water flow the concentrashytion will be higher than expected adjacent to the briquet because the toxicants cannot disperse equal distances in all directions In addition the concentration of AI at the center point between adjacent briquets may be below the lethal dose Exposure of mosquito larvae to sublethal doses may result in resistance to the AI If the water is flowing the problem is solved but you may get accelerated briquet erosion Altosid Briquet labels provide instructions for treatshyments in moving water

East Volusia Mosquito Control District (Florida) developed a method to apply a whole seasons worth of Altosid (30-day) Briquets

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DAYS AFTER APPLICATION

Figure 1

Release rates for Altosid Briquets altosid XR Briquits and Altosid Pellets

Fall1997 15

at one time They cap a 6-8 inch section of 1-inch ID PVC pipe atshytach this (cap-side up) to an alumishynum stake (packing tape works great) and drill a 38 inch hole through it at the other end Brishyquets are inserted into the cylinder sometimes with color coded poker chips as spacers and a wire is run through the hole (or the stake is bent inward) to prevent the briquets from falling out prematurely The stake is driven into the bottom at the breeding site As the breeding site is flooded the bottom briquet erodes away releasing AI Trapped air prevents water from reaching the other briquets Another briquet falls down to take its place when it is about gone A field inspector can count poker chips to see how many Altosid Briquets have been used up

When bottom contours are highly irregular and the water depth is shallow and decreasing you may

not want to use briquet formulations at all Consider whether or not the briquet will ever be isolated from any part of the intended treatment area during its active life If so larshyvae may escape control efforts The amount of carrier material used can dictate the quality of control you achieve and is a very important consideration Unless we formulate our own pesticides we must work with a fixed amount of toxicant per pound as determined b~middot the manushyfacturer for an average situation Wouldnt it be nice to have a series of dry formulations based on the same AI that best fit different situashytions

Consider Figure 2 for a moment It shows the approximate average number of particles per square yard for four different carriers This graph is the result of investigations by students attending the weekshylong Florida Mosquito Control Asshysociation Dodd Short Courses on

Larviciding during 1996 and 1997 plus the work of Pasco CMCDs John Schaediger who washed and counted thousands of grains of sand Notice that 6 pounds of Biodac1200 contain about the same number of particles as 1 0 lbs of 1 014 grit corn cob If you have determined that 1 0 lbs of Vectobac CG (which uses 1 014 grit corn cob) is the correct application rate for you then perhaps 6 pounds of Biodac 1200 formulated with the same amount of Bti will do the same job and save you 40 in weight At these rates they both contain approximately the same number of carrier particles per pound The weight difference could increase the economics of aerial application where the lower weight translates into more acres per payshyload per flight

We apply 75 lbs of granulated 1 014 grit corncob per acre as our base rate This includes both in-

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house mixes of blank granules with active ingredients and commercially finished products The 75 lbs is not just a figure that has been pulled out of the sky but one that many trials and observations have shown to be necessary to get good coverage with a variety of bottom contours and vegetation types You may need a different base rate When field personnel are conshyfronted with heavy detritus or vegshyetation aggregated larvae or a preponderance of late in star larvae they can then increase their applishycation by slowing down their pace or narrowing the swath to raise the dosage of pesticide (remembering to stay within the maximum labeled rate)

Whatever the formulation the proper application is critical to the efficiency and effectiveness of your program Larvicide labels comshymonly include only very general guidelines for application techshyniques or equipment selection This latitude allows applicators and technical staffs to choose a system that works best for their circumshystances A granular label notes the material should be applied unishyformly in conventional aerial and ground equipment

Equipment Calibration

Equipment calibrations are imshyportant for the effectiveness of your operation Consistency is born out of practice on top of more practice Failures of larvicides are often atshytributed to missed areas caused by poor applications Calibrating flows on dry application equipment is done either by timing how long it takes for a known amount to pass through the unit or by collecting all the material blown from the nozzle for a fixed period of time and then weighing it Either should be done by two people one that handles the machine and one that does the timshying The collection method retains

the material for subsequent tests but may restrict the flow on certain machines Machines with powershyful air blasts can only be checked by timing the discharge of a known quantity

Knowledge of the flow rate and of factors affecting it are critical to calibration The most common powshyered ground equipment used for dry applications is the gasolineshyengined backpack mistblower duster The units are capable of providing even coverage good throw and are simple to use They typically broadcast granules in a 40-60 ft swath width with the operator walking at 1-3 miles per hour This translates to 5-20 acres per hour of spray time Several things can be done to change the flow rate with the nozzle orifice or disc as the primary determinate Changing the pressure will also change the flow but to a much lesser degree and it has other side effects Some power dusters have movable grates that regulate flow over the normal opshyerating range Some brands have a series of replaceable orifice discs that allow discharge rate changes in small steps Blower speed also affects the throw but that should have marginal effect on the disshycharge rate

Other ground equipment that may be used include crank slinger seeders horn seeders and modishyfied ULV equipment (eg Arrow Guns mentioned above) The flow of spinning disc spreaders or othshyers with a mechanical agitator may be somewhat affected by the opshyerational speed Horn seeders which have about a 20 ft swath width when applying Bti granules are often used by our field personshynel to treat small sites They have replaced the Dipper and Bucket method where an applicator fills a dipper from a bucket of granules and then carefully and evenly broadcasts them

An Example

Assume you have determined that you can comfortably apply B ti corncob granules in 50ft swaths at 2 mph (121 acreshour) using a duster and you want to apply them at 25 to 10 lbsacre To get proper coverage in typical vegetation you will use 5 lbsacre and when conshyfronted with adverse conditions you may double or in this case with a maximum label rate of 20 lbs acre quadruple the application to get the proper dosage of pesticide to the insect

Fill the hopper with granules making sure not to get any pieces of paper or other debris mixed into the product If the unit is equipped with an air agitation system make sure that it is operational Start the engine and make sure that the granules are free flowing through the nozzle If the unit is equipped with an adjustable gate style regushylator center it for an initial trial Close the flow control For collectshying granules you need a nylon stocking and a scale that measures to ounces or grams Place the stocking over the discharge tube and secure it with a rubber band The stocking should be supported so it wont pinch the air flow off Run the blower up to speed and then open the flow valve as you start timing Have the operator open the valve as the stop watch is started

Because of the very low flows (small quantities) of granules needed take a sample over a given period in the 3-5 minute range Shut the flow off as the timer notes the end of the period Pull the colshylection into the bottom of the stockshying and remove it from the nozzle Place another stocking on the duster and collect a second sample and then a third sample Collect at least three samples weigh each and average the results Be sure to subtract the weight of the stock-

Fall1997 17

ing before calculating the average If one sample volume is much higher or lower than the other two samples then replace the odd sample with a new one Assume you collected three 5-minute samples that weigh 61 64 and 59 oz each The average is 61 3 oz5 min or 1227 ozmin

Practice

Swath tests are best done inishytially using a paved surface such as a parking lot for a practice spray plot because the granules are easshyily seen Blank granules for pracshytice and for your own formulating may be purchased from The Andersons (800-537-3370) and other sources Get 1014 grit if you use Vectobac CG or an equivalent and 58 grit if you use Vectobac G or an equivalent Fill the hopper with a weighed quantity of granules and walk over the plot trying to cover the entire area with an even dosage To determine how much was applied empty the hopper and weigh the material remaining Afshyter a good distribution has been

mast~red move onto a measured field where the terrain is more diffishycult and continue practicing Proshygressively move into more difficult areas as your skill level increases You can get to the point where you know what 5 lbsacre looks like in any habitat and then when you apshyply the real stuff you will know you have done so properly

Assume your practice spray plot is 18 of an acre Therefore to get the proper dose you want to apply 18 of 5 lbs (0625 lbs or 10 oz) to the plot You earlier calculated that your duster is putting out approxishymately 1225 oz per min The calshyculated time to put out the 1 0 oz required to treat the test plot is 082 minutes or49 seconds [determined by dividing 10 ounces by 1225] You also determined that you can treat 121 acreshour at a 2 mph walking speed At that speed you can treat about 16 of an acre in 49 seconds You have three choices to adequately cover your 18 acre practice plot 1) You can walk at your normal speed and apply at a rate slightly higher than 5 lbsacre 2) you can walk a little slower and

BVA

apply at the normal rate or 3) you can decrease the flow rate a bit to achieve the target rate at your norshymal application speed The choice is yours

If you have any questions feel free to contact the authors at Pasco County Mosquito Control District 2308 Marathon Road Odessa Fl 33556 Phone 813-376-4568 Fax 813-376-470 Email pcmcdgtenet

~

Doug middot wassmer _ _Jim middot _ Robinson middotand Jack-Frerich middotmiddot middot are-middot vyith the pascomiddotmiddotc_qun~y middot Mosquito Control bistr_ict middot

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In order to control or eradicate vector-borne disease the world Health Organization launched a substantial program of research on the screening evaluation and deshyvelopment of pesticides for the conshytrol of disease vectors and human pests in the early 1960s This proshygram of research and development continued into the 1970s Various collaboration centers and WHO regional research laboratories were involved in this multiphasic evaluashytion and research program This program was later designated as WHO-PES (WHO Pesticides Evaluation Scheme) which inshycluded laboratory screening of new pesticides and their formulations and finally small-scale and largeshyscale village field trials where effishycacy safety and feasibility of applishycation were studied Additionally whenever possible impact on the level of endemic diseases was also assessed The 41

h phase of this scheme addressed specification of pesticides and their formulations to be used in vector control

The WHO-PES program evenshytually came to a halt in the eighties and with restructuring of the vector Biology and Control Division in WHO this program came to a grinding halt It soon became apshyparent that member countries carshyrying on substantial vector control programs especially mosquito conshytrol operations soon reached the stage when appropriate tools and strategies for use in operational programs became quite scarce Member countries put forward deshymands for the development of more effective and safer chemical and

20 Fa111997

biological control measures To reshyspond to this global demand the Division of Control of Tropical Disshyeases (CTD) at WHO reinvigorated the WHO-PES Program by holding an informal consultation on the Evaluation and Testing of Insectishycides on October 1996 where I was asked to serve as the Chairperson of the consultation Copies of the report of this Consultation can be obtained from Dr Zaim Morteza whose address appears at the end of this article

As a result of the Informal Conshysultation and other discussions held at WHO regarding the future need for public health pesticides CTD recently (1996) launched the GCDPP program This is indeed a crucial program which requires colshylaboration among national and inshyternational agencies research inshystitutions industry and regulatory agencies The main objectives elshyements and scope of this program are briefly discussed below

The main objectives of the GCDPP program are

bull To facilitate the search for alternative pesticides including mishycrobial pesticides as well as applishycation methodologies

bull To advise on the relative priority of activities within the manshydate of GCDPP

bull To advise on issues related to the development and use of pesshyticides and application equipment within the context of WHOs global disease control strategies

bull To promote harmonization of activities related to pesticide deshyvelopment and safe use

bull To promote and encourage the highest quality of work through appropriate resource mobilization

bull GCDPP will serve as an advisory group to CTDWHOPES in matters of pesticide developshyment safe and proper use and apshyplication equipment

Membership and Meetings

A number of agencies organishyzations and manufacturers of pesshyticides and application equipment will become members of GCDPP as well as foundations and WHO Collaborating Centers Other groups and -organizations involved in manufacturing pest manageshyment and crop protection will also be invited Attempts will be made to maximize representation but at the same time ensure appropriate balance In addition to the above distinguished scientists and direcshytors of WHO Regional Offices may also be invited to attend the meetshyings of GCDPP

GCDPP will provide a forum for the exchange of technical informashytion and oversee the WHO-PES biennial plan and collaboration with other organizations and institutions GCDPP will meet every other year in Geneva Switzerland Informal consultation meetings on specific topics will be convened as the need arises CTD will be responsible for the organization of such meetings

continued on page 25

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How many of you know the names Norma Jean Baker Cornelius Magillicutty dichloroshydiphenyl-trichloro-ethane Haliaeetus leucocephalus and its distant relative Taxodium distichum How about Aedes albopictus Well if you are willing to bet $100 you know all six withshyout looking at the answers then you are either very bright very old well read or have too much time on your hands If you know only one I hope its the Asian tiger mosquito What if for the remaining five I gave you the hints of Some Like it Hot baseball legend insecticide whiteshyheaded bird and tree with knees The older ones amongst us and thats getting to be a higher percentshyage each year should recognize Marilyn Monroe and Connie Mack for the first two All of you should be ashamed of yourself if you dont recognized DDT The last two reshylated by name only are Bald Eagle and Bald Cypress If you got both of those you are probably psychic and also know what the point of this article is

And what is the point of this arshyticle the need for common names for mosquitoes Most of us know the birds plants and mammals by their common names Why then must we for the most part use scishyentific names for mosquitoes There are other names that would be more meaningful easier to spell and certainly easier to pronounce Ill bet my $100 right now that 50 of us couldnt spell Toxorhynchites or taeniorhynchus in a spelling bee Thank goodness Aedes abopictus had a catchy common name when

- bull bull -middot ~ bull middot- ~ bull ~ bull

it became established in the US in 1985 Never mind that the common name conjured up all sorts of wrong impressions Asian tiger mosquito was a lot easier for the public and press and I dare say most mosshyquito control practitioners to undershystand and remember Also our friends at the Entomological Socishyety had the accepted common name as Forest Day mosquito but to their credit they changed it to what every one calls it the Asian tiger mosquito

So despite their scientific bent scientists can be influenced to change their minds If common names and abbreviations too didnt have a purpose that is to help us to communicate then we would all be saying too many long boring and confusing sentences Consider the following For years Cornelius Magillicutty sprayed his back yard with dichloro-diphenylshytrichloro-ethane for Aedes abopictus and then years later with Norma Jean Baker at his side watched the thin-shelled eggs of Haliaeetus leucocephalus drop out of 500-year old Taxodium distichum that he loved so much Yawn

Its that kind of phraseology that keeps people including some scishyentists from reading the scientific literature When trying to commushynicate any word or phrase that your listener doesnt know or understand tends to confuse them annoy them or make them feel inferior and that often makes them stop listening Communicating with the public has become a major mosquito control activity in recent years When com-

municating with the public scientific terms and jargon are neither desirshyable or necessary Mosquito control activities can be explained in very simple terms We could use the term Bacillus thuringiensis var israeensis instead of BTl but how many of us do Telling the average person SLE is an arbovirus doesnt give them any more information than telling them its a virus

And whats with this italics stuff for scientific names Ask people (inshycluding you perhaps) why we italishycize scientific names and most will probably guess that its to emphashysis the term Wrong If you care why look it up Lets forget it from now on OK If you cant write Culex quinquefasciatus without italics then consider my alternative-comshymon names that dont need to be italicized

The Entomological Society of America has a committee that conshysiders and usually rejects proshyposed official common names for insects There are only 14 mosshyquitoes on that list and I dare say most of us dont use most of them The problem with this list is that it was developed by scientists and everyone knows that all scientists are mad not just those in the movshyies Scientists want to do things in a scientific manner-logical meshythodical and precise Just because the entomological journals will only let you use accepted common names in their pages doesnt mean we cant use other common names in presentations and io print and we should

Fall1997 23

What we need is a list of comshymon names that the average mosshyquito control practitioner uses No one that anyone takes seriously will say they found some Culex pipiens quinquefasciatus (note no italics) in a polluted pond Most will say quinks Sure we can capitalize Quinks if it makes you feel better it does me So why are we afraid to write Quinks in our reports or say Quinks in formal talks Most people probably dont say quinks (see I dont insist on capitalization) because they think it makes them sound unprofessional Quinks is a distinctive short easy to rememshyber and fun to say name it has a beat that you can dance to and I give it a 99 Does anyone you know call quinks the southern house mosquito the accepted common name How about northern house mosquito for pipiens

Taenies or taenys or whatshyever spelling you want to use is easily recognized by east and south coast mosquito people as the comshymon name for Aedes taeniorhynchus one of the saltmarsh mosquitoes Again its a distinctive short easy to rememshyber and fun name It also describes the size of the species somewhat small or teeny-a bonus And who doesnt use Tox as the common name for our other spelling bee example

We dont hesitate to use comshymon names for a group of mosquishytoes that breed in a particular habishytat In addition to saltmarsh mosshyquitoes we refer to floodwater mosquitoes (which incidently also describes many saltmarsh mosquishytoes) tree hole mosquitoes dirty water mosquitoes grey water mosshyquitoes freshwater mosquitoes container-breeding mosquitoes pasture mosquitoes rock hole mosshyquitoes crab hole mosquitoes and on and on These habitat names are not mutually exclusive For exshyample pasture mosquitoes are also floodwater mosquitoes and fresh-

24 Fall1997

water mosquitoes By the way the translation of floodwater mosquito according to the Entomological Soshyciety is Aedes sticticus What Habitat names are also convenient for discussions among people from different geographic areas For example nature tends to give the same qualities to mosquitoes that breed in tree holes regardless of whether they are tree holes in Calishyfornia Virginia Queensland or Borneo From an operational mosshyquito control standpoint knowing the habitat of the mosquito can be more informative than knowing its scientific name

So lets consider some common names of species that we might use One common pest and potenshytial vector species that needs a common name is Coquillettidia perturbans (I think Ive weaned myself from italics) the aggressive biter whose larvae attach to the roots of aquatic plants particularly cattails (I could have said Typha species) Cattail mosquito is a natural even though larvae may attach to a variety of plants Another name could be the salt and pepshyper mosquito or another name taken from its scientific name could be the perturbing mosquito

How about the Anopheles The accepted common name for Anopheles quadrimaculatus is the common malaria mosquito This may have been accurate when malaria was a problem in this counshytry but now neither malaria nor this mosquito is common in this counshytry Im sure most of our hypothetishycal naming committee made up of operational mosquito controllers would call them quads

We have already dealt with Quinks Another obvious common name for another Culex Cx salinarius is sally or sallys or sallies Culex restuans is a little more tricky but how about rusty Rusty is suggestive of the color of the mosquito and it is similar to

resty a name that just doesnt sound right to me

Aedes vexans a common floodshywater mosquito in much of the US needs a common name The acshycepted common name vexans mosquito would be OK if most people know what vexing means And if they do why not call it the vexing mosquito Calling Aedes aegypti in the US by its accepted name the yellowfever mosquito is misleading Yellow fever has been absent from the US since right after the turn of the century Aegypti or gyps is often used by field and lab workers so why not adopt those terms

I could go on and on but Im more interested in what you think If you will send me your common names (keep it clean please) for any species you are familiar with Ill be happy to compile them and report back in a future article in Wing Beats (Theres that italics again different reason) If they appear in Wing Beats maybe just maybe we can call them official common names You can fax me at 561-778-7204 or E-mail me at cdmognvifas ufledu By the way you can address the message to Charlie Chas or Char The only person I insist call me doctor is my ex-wife and I would rather she didnt call me at all

-C_h~ulie M~rtis middot is an Assoshy _ciate middotPi~fesso( at the Unishy versity ~f floridas Medical Eiitomology Laboratory middot hi middot middot

Verq Beach Fiorida~

continued from page 20

providing support for report prepashyration and other documents and perform secretarial functions

Funding

In order to advance the objecshytives of GCDPP a stable source of funding will be necessary WHO CTD (WHO-Division of Control of Tropical Diseases) will establish and administer a trust fund which will be designated as GCDPP-Trust Fund which will be administered according to the WHO financial rules regulations and practices

The trust fund will be used to convene meetings production and dissemination of documents exshychange and dissemination of inforshymation on the need for public health pesticides and equipment and for activities which will promote the development and use of alternative safe compounds or application equipment

1James of organizations institushytions foundations manufacturers and individuals participating and contributing to this program will be listed Each participant will be enshycouraged to make annual contribushytions to the trust fund

Further Information

For further information on WHOshyPES or GCDPP contact Dr Zaim Morteza WHO-PES CTD World Health Organ ization 1211 Geneva 27 Switzerland E-mail zaimmwhoch

Nlir smiddotMulla is a Profes-sor with the Deparfrilent of ~nt-oshy_mologyUniverslty at califor middot -nia Riversidemiddot CA92521 middot _ middot middot

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middotMulla= Receives -middot

Recognition Awar(j _

Mir S Mulla Professor of Entoshymology Department of Entomolshyogy University of California Rivershyside CA was presented the Scishyence Society of Thailand~ Meritoshyrious Recognition Award by the Thailand Minister of Science and Technology last October

Mulla an authority on insects of medical and public health imporshytance was cited for his efforts and leadership in organizing the First International Symposium on Biopesticides convened at Naresuan University in Thailand This symposium attended by some 300 participants from 20 countries covered biodiversity safety toxicshyity efficacy and proper use of biopesticides based on natural products and pathogenic organshyisms The proceedings of this first symposium amounting to 300 pages will be published soon

Mulla informs us that the 2nd International Symposium on Biopesticides will be held in late October 1998 on Langkawi Island off the coast of Malaysia Anyone interested in receiving further inforshymation regarding the proceedings or the second symposium should contact Dr Mulla at tel (909) 787-5818 fax (909) 787-4210 and eshymail mulla mailucredu

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Notice Psotophora middotgtcyaneseens collect~d middotin Aiachua County FL

- ~

and 9 pupae of this species were collected by the author from a sunshylit small (ca 2 m diam and 20 em deep) grass-lined pool filled with rainwater at Gainesville Florida

a common identification number with their 41h instar larval and pupal exuviae On subsequent visits to the site no additional Ps cyanescens were collected

Psorophora cyanescens (Coquillett) previously has been reported in Florida from the followshying counties Bay Duval Escambia Gadsden Hillsborough Jackson Leon Okaloosa Suwannee and Union (HT Evans Florida Mosquito Control Handbook 1994) On 26 May 1997 one 4h instar larva

Also collected from the pool were numerous larvae and pupae of Psorophora columbiae (Dyar and Knab) Aedes vexans (Meigen) and Culex salinarius Coquillett and 17 4h instar larvae of Psorophora ciliata (Fabricus) All immatures were individually reared and the resulting adults were linked by

John -Fmiddotmiddoteeinert is with Jlie CeMte(for Medicental middotAgricultural

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Fall1997

Date completed

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[~middot ~-l_m_p~o_rt_a_n_c~e~_] Culex erythrothorax is a comshy

mon pest near thickly vegetated marshes and backwaters in the western United States This mosshyquito exhibits crepuscular peaks in feeding activity as do other co-ocshycurring Culex species such as Culex tarsalis and Culex quinquefasciatus However unlike its congeners Culex erythrothorax

readily feeds during the day parshyticularly if disturbed from the vegshyetation in and surrounding larval developmental sites Although sevshyeral arboviruses have been isolated from field collected Culex erythrothorax throughout its range in the western United States Culex erythrothorax is thought not to play a significant role in arbovirus (St Louis encephalitis and western equine encephalomyelitis viruses) transmission

8 Fall1997

~itt 3()~~-~~ ot The Tule Mosquito

Culex erythrothorJX

[Geographic Di~tribution J

The geographic range of Culex erythrothorax extends from southshyern Idaho to Mexico Specimens have been collected east of the Rocky Mountains in southeastern Colorado and west of the Southshyern High Plains in west Texas This species is common in freshwater marshes in Nevada in Utah and in the foothill and coastal areas of California The western extent of its range is the Channel Islands off the coast of California middot

[ Adult Descmiddotription

The reddish coloration of the thorax readily distinguishes Culex erythrothorax from its congeners Pale basal markings of the abdomishynal terga and the absence of tarshysal banding can be used to sepashyrate this species from nearly all of the other Culex in California exshycept for the pipiens group Hairshylike scutal scales and the narrow yellowish indistinct abdominal bands readily separate Culex erythrothorax from Culex pipiens and Culex quinquefasciatus

~ middotLarval Description J The long narrow siphon the

distribution of hair tufts on the sishyphon and the morphology of lower head hairs distinguish the later inshystars of Culex erythrothorax larvae from larvae of commonly occurring congeners The length of the sishyphon is six to seven times its basal

width The siphonal hairs consist of more than one branch and the third and fourth pair of hairs on the siphon are inserted laterally The remaining three pair of siphonal hairs are inserted ventrally The nurnber of branches of the lower head hairs (group number 6) is inshytermediate among the Culex found in California

Larval Habitat andmiddot Behavior

Larval developmental sites inshyclude freshwater impoundments seeps and ditches that contain stands of tule (bulrush) and cattail vegetated river margins large pershymanent swamps and man-made wetlands containing considerable vegetation Larvae are typically difshyficult to collect by dipping As comshypared to the relative abundance of adults collected by carbon dioxideshybaited traps and by emergence traps Culex erythrothorax is undershyrepresented in larval surveys Onshygoing studies comparing the beshyhavior of Culex erythrothorax larshyvae to co-occurring congeners (Culex tarsal is and Culex quinquefasciatus) indicate that Culex erythrothorax larvae are much more sensitive to physical disturbance (ie shadows and disshyturbance of the water surface) than are larvae of congeners Other asshypects of larval behavior such as diving pattern aggregation attracshytancy to vertical egges etc of Culex erythrothorax also differ apshypreciably from its congeners The

continued on page 11

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Were back say P vivax and P faciparum two of the little felshylows in the microbe world that cause malaria

More exotic diseases catch the attention of the media and Hollyshywood - Ebola for example which killed about 250 people in six months in the last outbreak in Afshyrica

Heck we kill 5000 Africans a day our little microbe friends say And were coming back to the United States where we once were very common as recently as the 1930s In fact we never left We just dont get our fair share of the media spotlight Liberal press you know

Globally malaria which is spread by a mosquito kills more than 27 million people a year and sickens about a half-billion

People cau go somewhere pick up au iufectiou aud fly back home loug before the symptoms show up

These and other interesting facts are from a well-written piece in the August issue of Atlantic Monthly by Ellen Ruppel Shell You should read it

10 Fall1997

IVly own trusty Statistical Abshystract of the United States shows that there have been an average of 1 200 cases of malaria per year in the United States for the last six years

Malaria can cause brain damage and is fatal in 10 percent to 50 pershycent of the cases What intrigues me is that we are as happens when societies become irrational workshying at cross-purposes

Environmentalists want to preshyserve swamps and create more They now call them wetlands and they are sacred They are also the places where mosquitoes breed not only those which are carriers of malaria but also those which carry yellow fever (you really dont want old yellow jack to come back) denshygue or breakbone fevermiddot and enshycephalitis

Environmentalists also don t want to spray pesticides But it was the draining of swamps and the spraying of pesticides that ended the terrible toll malaria once exshyacted from Americans

Maybe it would not matter exshycept for global trade immigration illegal immigration tourism and all of the above aggravated by jet travel

People can go somewhere pick up an infection and fly back home long before the symptoms show up People can arrive here full of infecshytion without showing symptoms

Doggone those unintended conshysequences

I dont often look into my crystal ball (its mainly a paperweight) but if I were going to make a long-term bet Id bet that environmental exshytremism is about at the end of its run

Let a few hundred voters die from malaria and I suspect the politicians will suddenly look quite differently on the alleged value of swamps and a no-pesticide policy

Imagine a mini-epidemic of mashylaria or breakbone fever in a major tourist area

Given the number of internashytional visitors and illegal immigrants who do the menial jobs such an epidemic is not that far-fetched

I live in such an area and I can tell you that the murder of just one foreign tourist gives the chamber of commerce the hoteliers the atshytraction owners and even the govshyernor one giant-sized migraine

Imagine what a migraine if 300 or 400 tourists ended up in a hosshypital with a contagious tropical disshyease It would not as they say in flack world be good publicity

It would in fact be terrible pubshylicity because a prospective tourist might reason correctly that the odds of getting shot are slim but the odds of getting bitten by a mosquito during a mostly outdoor vacation are considerably higher They would stay away

continued on page 13

continued from page 8 sensitivity to disturbance and the afshyfinity of Culex erythrothoraxlarvae for vegetation make sampling by dipper very difficult and unreliable

[ Bloodfee~fng middot__ middot_ _ J

Culex erythrothorax is an opporshytunistic feeder which shows a disshytinct east-west cline in feeding prefshyerences In the eastern part of its range individuals collected near Salt Lake City were found to feed primarily on birds In southeastern California engorged individuals were found to feed equally on birds and mammals In much of central and southern California blooded females fed primarily (about 90 of identifiable blood meals) on mammals Rabbits cattle dogs and humans are among the most commonly utilized mammalian hosts

middot middot s~rvival- and middot _ Dispersat ~~ middot

Comparatively good survival of adult females and limited dispersal tendencies are two important facshytors causing large host-seeking populations to develop in the vicinshyity of bulrush marshes At well esshytablished wetlands in southern Calishyfornia it is not uncommon to colshylect between 10000 and 33000 females per C0

2-baited trap per

night during the summer Female survivorship is typically higher than for other co-occuring congeners Compared to other Culex species host-seeking Culex erythrothorax females typically disperse short disshytances Host seeking females are rarely collected more than 2 to 25 kilometers from developmental

sites However local wind condishytions and the availability of hosts may cause large numbers to disshyperse distances greater than 25 km (15 miles) from natal sites The anthropophily of this species could make Culex erythrothorax a distinct pest of humans residing near wetshylands

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Position middot Announcement

MOSQUITO CONTROL MANAGER

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12 Fa111997

- middotmiddot-

-middot -

- - ~

Meetings of Interest

FMCA Annual Fall Meeting November 16-20 1997

1997 Annual Fall Meeting of the Florida Mosquito Control Associashytion Radison Ponce de Leon Reshysort in St Augustine FL

For more information contact Shelly Redovan PO Box 60837 Fort Myers FL 33906-0837 Tel (941) 694-2174 Fax (941) 694-6959

Entomological Society of America Annual Meeting December 13-18 1997 Nashville TN

Contact (301) 731-4535 or e-mail meetentosocorg

Info is available on the web at httpwwwentosocorg

MVCAC Annual Conference January 25-28 1998

661h Annual Mosquito and Vecshytor Control Association of Califorshynia Conference Tenaya Lodge Fish Camp California

Contact Don Eliason at Tel (916) 685-2600 Fax (916) 685-1768 e-mail movcacaolcom

WCMVCA Annual Meeting February 19-201998

West Central Mosquito and Vecshytor Control Association meeting at the Grand Vista Hotel in Grand Junction CO

Contact Wayne Kramer at (402)471-0506 for more informashytion

AMCA Annual Meeting March 8-12 1998 John Ascuagas The Nuggett

(800)648-1177 in Sparks Nevada

Contact AMCA Central Office (318) 47 4-2723 for more informashytion

North American Conference on Pesticide Spray Drift Management March 29-April 1 1998 Holiday Inn by the Bay Portland Maine

For further information contact Jim Dill UMCE Pest Management Office 491 College Ave Orono ME 04473-1295 Tel (207) 581-3880 Fax (207) 581-3881

Visit their Web Site at httpwwwstatelleus

agriculturedrift1htm

continued from page 10 All Im suggesting is that we have

put up with extremists and village idiots long enough and wed better settle back into down-to-earth realshyistic work in the fields of public health public safety and governshyment in general Weve allowed the inmates to run the asylum long enough Now its time for a return to normal behavior normal actions and sensible science

Daffy ideas and ideology notshywithstanding if you play around with nature it will kill you -~

~charley Ree~e i$ ~ middot synCti middot -cated columnist with the _ Orla~dQ _Sentinel lie _can ~e reached __ by email at middot -

middot - OSOre~se~aol_corn -- middot -~ middot copy 1997~ Klt-_G FEA_TURE middotsvNDICATE-INC-middot

- Editorsmiddot_Vote-Themiddot previ6middotus articent1~ - w$smiddot i ri ~~

eluded-to sHmul~te tllowght middotandmiddot hopefully elicit a -response from our readers middot- Wel i ltludn~i our -editorial procentessmiddot it was brought to my atten-middot tion -f~at a responsemiddot _to this-article had-alreadY be-E3ri submitted to __ the Orlando -sentineL - instead of pub Hshingmiddot this response lnih~ ~next i5sue of WingBeats 1-chose middotto ind~demiddot it akgtrig wi_th tflis articlemiddot -to _provfde another viewpoint wmiddotIJich -rnay h~lp to-correct a few oftlie inaccuracies

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Dennis Moore middot P-O Box -66oo5 middot

middotFort Myers Fl_ middot33906 middot middot Tel 941~694~2174 --- middotmiddot

middot Fax 941--694-695S middot -middot e~mail rnooredniailcimsstatefLIls

-middot_~esporise middot tr middot_ VlewpointColumn middot

Charlie Reeses August 14th colshyumn proclaims that the preservashytion of wetlands and the reduction of pesticide spraying near these areas will in the near futu re lead to many cases of malaria and other diseases He states that this is environmental extremism and not realistic

Unfortuntely his sensible scishyence lacks the support of actual facts For instance the 1 200 cases of malaria per year in the United States for the past six years are almost all imported cases conshytracted in other countries where conditions are more conducive to transmission Only a handful of malaria cases transmitted within the states have been recorded within the last 40 years Although the draining of swamps and spraying of pesticides did play a role in the reduction of malaria in Florida they were only a portion of the solution Window and door screenings coupled with the spread of air conshyditioning throughout Florida played a large role in keeping mosquitoes out of houses where pesticides couldnt reach

Furthermore the mosquitoes that transmit yellow fever and dengue do not breed in swamps but in small containers (such as flower pots and rain gutters) scattered thoughout every neighborhood Pesticides are often ineffectual against these urban mosquitoes So window screening again played a major role in reducing these two diseases in Florida

Although wetlands are the known breeding grounds for many mosquitoes manipulated wetlands such as rice fields in Texas orange groves cattle pastures and cane fields in Florida actually pose a much larger threat to people in

terms of producing large numbers of disease vectors The alleged value of swamps that Mr Reese mentions lies in the functions of rain and stormwater collection and disshypersal Without such wetlands rain must go somewhere and many low-lying agricultural areas such as rice fields and orange groves turn into mosquito breeding grounds

Draining swamps and spraying pesticides are not a magic bullet for mosquito and disease control Reliance on these methods alone has taught mosquito control and health officials harsh lessons Mosshyquitoes and the diseases they spread have complicated life cycles which can intertwine with our own socioeconomic cycles

Mr Reese should contact the village idiots and extremist who work daily in mosqito control to learn the facts The difficult task of controlling mosquitoes in Florida is an ongoing challenge We have learned from others that have failed to utilize multiple control methods and relied too heavily upon one method

Pesticide resistance of malarial mosquitoes presents a real danger to public health For example the over-use of DDT for malaria conshytrol as well as crop protection in Sri Lanka failed to prevent the disease and resulted in over 400000 cases of malaria in 1975 Cotton farmers in El Salvador and Guatemala have been drenching their fields with every known insecticide These actions have produced malaria mosquitoes resistant to all chemishycals Mr Reese is right on one count If you fool around with nashyture it can kill you

middot- -zach --Prumiddotsa_~ ~Enviroomental middot As$9ciate and Fred Harderi -CQri$Jitan_t_ are with middott_ll_e Reedy middotmiddot Creek lniproverrientDistrict in -

middotmiddot Lake Buena vlst~ - FL middot- middot middot

Fal11997 13

9eat~te Applyitlg iarvietdes middot Forntulated middot With ~Dty Carriers middot middotmiddot middotmiddot middot bullmiddotmiddotmiddotbull middot

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Most modern mosquito control operations include larviciding as an integral part of their pest manageshyment practices Mosquito larvicides are available in a wide range of types and formulations Dry formushylations include briquets granules and pellets

Formulations usually are applied directly out of the container genershyally with no need for mixing Some sand formulations may be made on site by following instructions proshyvided on the labels There is usushyally a range of rates for each forshymulation to cover different habitats and water quality depth movement and organic content plus other facshytors discussed on product labels

Selecting the formulation and application rate that gives you the best coverage for your larval habishytats requires some thought Dryshyformulated larvicides may be apshyplied by hand with ground equipshyment and by air In this article we focus on ground applications and calibration as we have in the previshyous two articles in this series

Calibration is an encompassing principal that includes

1 determining what insecticide formulation to use

2 the rate of toxicant per acre to apply

3 the total spray volume needed to use to get good coverage

4 determining (or setting) the flow through the nozzle

5 determining the effective swath width and if appropriate the walking pace of application

14 Fall1997

After these parameters are set the applicators should practice by spraying a measured area against the clock Through practice the applicator will develop visual cues and hand-eye coordination which leads to standardizing hisher covshyerage per minute These factors apply to granular blowers horn seeders and other dry formula apshyplication tools including aerial spreaders

Choosing The Formulation

The three active ingredients most commonly used in dry larvishycide formulations are temephos sshymethoprene and delta-endotoxin (Bti) All three may be mixed with plaster (eg Altosid Briquetsreg Altosid XR Briquetsreg Altosid Pelshyletsreg and 5 Skeeter Abatereg) with food substances (Bactimos Pelshyletsreg) or with cork (Bactimos Brishyquetsreg) They also may be attached to ground-up corncob (eg Vectobac Greg and Vectobac CGreg) paper pulp waste material (eg Abadac which is liquid Abate plus Biodacreg Aitodac which is Altosid Liquid Larvicidereg plus Biodac) or sand (eg 1 Skeeter Abatereg LarvXSGreg and Aitosand which is Altosid Liquid Larvicide plus sand) Briquets generally are designed for use at rates ranging from 1 per 200 square feet (218 per acre) to 1 per 25 square feet (1742 per acre) A typical application rate is 1 per 1 00 square feet (436 per acre) in many situations Some granular products may be applied at up to 20 lbs per

acre but applicators typically used 5-10 lbs per acre

Briquets and pellets slowly reshylease toxicants to provide sustained control for one or more months The Bti toxicants are stomach poisons which must be placed in that part of the water column where the tarshyget larvae feed S-methoprene and temephos are contact poisons which mix with the entire water column Bactimos Briquets which float are primarily a mixture of Bti and cork and are often staked in place to prevent their being moved by wind waves and animals Altosid Briquets Altosid XR Brishyquets Altosid Pellets and Skeeter Abate Pelletsreg are made with plasshyter and sink to the bottom Some mosquito control agencies place briquets in fine wire mesh baskets and suspend them in storm drains just above the bottom so they are not swept away or buried Sand formulations also sink but a new Bti formulation LarvXsg is coated with vermiculite which reshyleases and carries the Bti back to the surface from which it is reshyleased Some Bti corncob granshyules in each bag will float while othshyers may sink This is also true for formulations using Biodac as a carshyrier

Briquets are most commonly dispensed by hand but Clarke Equipment Companys Arrow Gunreg is sometimes used to broadcast Altosid Briquets but not Bactimos Briquets The Arrow Gun uses compressed air captured from a non-thermal ULV aerosol generashytor to propel briquets down its barshyrel It may be used for lobbing one

or a few briquets into isolated small pools where placement is not a critishycal issue both in terms of cost and eHiciency Applicators may also use a slingshot The Arrow Gun works very well for applying pellet ground corn cob and other granushylar carrier formulations in large amounts In order for the equipment to be used properly as with any application equipment it must first be calibrated

Figure 1 shows release rates for Altosid Briquets Altosid XR Brishyquets and Altosid Pellets These curves are adapted from an article by Dr Doug Ross et a called Methoprene concentrations in freshwater microcosms treated with sustained-release Altosid formulashytions (Mosquito News 1994 Vol 1 0(2 pt 1 pp 202-21 0 They are indirect measures of release rates derived by measuring the concenshytration of active ingredients in the water Notice that the AI is not reshyleased uniformly throughout the active life of the formulations Conshysider this when you are larviciding We suspect that most solid larvishycides have characteristic release rate curves but we are not aware of any published descriptions If we could tap into the EPAs confidenshytial data files we might be able to find out more about this topic

In a large rectangular area usshying a 1 briquet1 00 sq ft applicashytion rate if briquets are placed in the recommended 1 0 foot intervals in even rows the maximum (diagoshynal) distance between two adjacent briquets is a little over 14 feet Imagshyine a square with a briquet in each corner and mosquito larvae in the center a little over 7 ft from each briquet To decrease the maximum diagonal distance between briquets to 1 0 feet while still placing briquets every 10 feet in rows stagger the rows so the briquets in the second row are between the briquets in the first row Materials science tells us this is the most efficient spacing scheme We recommend practic-

ing briquet placement in a mowed yard prior to actual field work This will allow you to get your spacing right Monroe County (Florida) Mosquito Control District field pershysonnel typically hand-apply over 20000 Altosid Briquets every year by walking their breeding sites with a 2 gallon pail full of product

STAGGERED X X X

X X X

X X X

ABREAST

X X X

X X X

X X X

Another problematic situation occurs when treating a narrow ditch If a ditch averages 8 feet wide you would apply a briquet every 125 linear feet to get the 1 briquet per 1 00 sq feet If the ditch averaged 2 feet wide you would apply one briquet for every 50 linshyear feet In the case of a narrow ditch and in the absence of any external mixing forces such as wind or water flow the concentrashytion will be higher than expected adjacent to the briquet because the toxicants cannot disperse equal distances in all directions In addition the concentration of AI at the center point between adjacent briquets may be below the lethal dose Exposure of mosquito larvae to sublethal doses may result in resistance to the AI If the water is flowing the problem is solved but you may get accelerated briquet erosion Altosid Briquet labels provide instructions for treatshyments in moving water

East Volusia Mosquito Control District (Florida) developed a method to apply a whole seasons worth of Altosid (30-day) Briquets

-ltgt-BRIQUETS

10 15 20 25 30 35

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DAYS AFTER APPLICATION

Figure 1

Release rates for Altosid Briquets altosid XR Briquits and Altosid Pellets

Fall1997 15

at one time They cap a 6-8 inch section of 1-inch ID PVC pipe atshytach this (cap-side up) to an alumishynum stake (packing tape works great) and drill a 38 inch hole through it at the other end Brishyquets are inserted into the cylinder sometimes with color coded poker chips as spacers and a wire is run through the hole (or the stake is bent inward) to prevent the briquets from falling out prematurely The stake is driven into the bottom at the breeding site As the breeding site is flooded the bottom briquet erodes away releasing AI Trapped air prevents water from reaching the other briquets Another briquet falls down to take its place when it is about gone A field inspector can count poker chips to see how many Altosid Briquets have been used up

When bottom contours are highly irregular and the water depth is shallow and decreasing you may

not want to use briquet formulations at all Consider whether or not the briquet will ever be isolated from any part of the intended treatment area during its active life If so larshyvae may escape control efforts The amount of carrier material used can dictate the quality of control you achieve and is a very important consideration Unless we formulate our own pesticides we must work with a fixed amount of toxicant per pound as determined b~middot the manushyfacturer for an average situation Wouldnt it be nice to have a series of dry formulations based on the same AI that best fit different situashytions

Consider Figure 2 for a moment It shows the approximate average number of particles per square yard for four different carriers This graph is the result of investigations by students attending the weekshylong Florida Mosquito Control Asshysociation Dodd Short Courses on

Larviciding during 1996 and 1997 plus the work of Pasco CMCDs John Schaediger who washed and counted thousands of grains of sand Notice that 6 pounds of Biodac1200 contain about the same number of particles as 1 0 lbs of 1 014 grit corn cob If you have determined that 1 0 lbs of Vectobac CG (which uses 1 014 grit corn cob) is the correct application rate for you then perhaps 6 pounds of Biodac 1200 formulated with the same amount of Bti will do the same job and save you 40 in weight At these rates they both contain approximately the same number of carrier particles per pound The weight difference could increase the economics of aerial application where the lower weight translates into more acres per payshyload per flight

We apply 75 lbs of granulated 1 014 grit corncob per acre as our base rate This includes both in-

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58 corncob

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house mixes of blank granules with active ingredients and commercially finished products The 75 lbs is not just a figure that has been pulled out of the sky but one that many trials and observations have shown to be necessary to get good coverage with a variety of bottom contours and vegetation types You may need a different base rate When field personnel are conshyfronted with heavy detritus or vegshyetation aggregated larvae or a preponderance of late in star larvae they can then increase their applishycation by slowing down their pace or narrowing the swath to raise the dosage of pesticide (remembering to stay within the maximum labeled rate)

Whatever the formulation the proper application is critical to the efficiency and effectiveness of your program Larvicide labels comshymonly include only very general guidelines for application techshyniques or equipment selection This latitude allows applicators and technical staffs to choose a system that works best for their circumshystances A granular label notes the material should be applied unishyformly in conventional aerial and ground equipment

Equipment Calibration

Equipment calibrations are imshyportant for the effectiveness of your operation Consistency is born out of practice on top of more practice Failures of larvicides are often atshytributed to missed areas caused by poor applications Calibrating flows on dry application equipment is done either by timing how long it takes for a known amount to pass through the unit or by collecting all the material blown from the nozzle for a fixed period of time and then weighing it Either should be done by two people one that handles the machine and one that does the timshying The collection method retains

the material for subsequent tests but may restrict the flow on certain machines Machines with powershyful air blasts can only be checked by timing the discharge of a known quantity

Knowledge of the flow rate and of factors affecting it are critical to calibration The most common powshyered ground equipment used for dry applications is the gasolineshyengined backpack mistblower duster The units are capable of providing even coverage good throw and are simple to use They typically broadcast granules in a 40-60 ft swath width with the operator walking at 1-3 miles per hour This translates to 5-20 acres per hour of spray time Several things can be done to change the flow rate with the nozzle orifice or disc as the primary determinate Changing the pressure will also change the flow but to a much lesser degree and it has other side effects Some power dusters have movable grates that regulate flow over the normal opshyerating range Some brands have a series of replaceable orifice discs that allow discharge rate changes in small steps Blower speed also affects the throw but that should have marginal effect on the disshycharge rate

Other ground equipment that may be used include crank slinger seeders horn seeders and modishyfied ULV equipment (eg Arrow Guns mentioned above) The flow of spinning disc spreaders or othshyers with a mechanical agitator may be somewhat affected by the opshyerational speed Horn seeders which have about a 20 ft swath width when applying Bti granules are often used by our field personshynel to treat small sites They have replaced the Dipper and Bucket method where an applicator fills a dipper from a bucket of granules and then carefully and evenly broadcasts them

An Example

Assume you have determined that you can comfortably apply B ti corncob granules in 50ft swaths at 2 mph (121 acreshour) using a duster and you want to apply them at 25 to 10 lbsacre To get proper coverage in typical vegetation you will use 5 lbsacre and when conshyfronted with adverse conditions you may double or in this case with a maximum label rate of 20 lbs acre quadruple the application to get the proper dosage of pesticide to the insect

Fill the hopper with granules making sure not to get any pieces of paper or other debris mixed into the product If the unit is equipped with an air agitation system make sure that it is operational Start the engine and make sure that the granules are free flowing through the nozzle If the unit is equipped with an adjustable gate style regushylator center it for an initial trial Close the flow control For collectshying granules you need a nylon stocking and a scale that measures to ounces or grams Place the stocking over the discharge tube and secure it with a rubber band The stocking should be supported so it wont pinch the air flow off Run the blower up to speed and then open the flow valve as you start timing Have the operator open the valve as the stop watch is started

Because of the very low flows (small quantities) of granules needed take a sample over a given period in the 3-5 minute range Shut the flow off as the timer notes the end of the period Pull the colshylection into the bottom of the stockshying and remove it from the nozzle Place another stocking on the duster and collect a second sample and then a third sample Collect at least three samples weigh each and average the results Be sure to subtract the weight of the stock-

Fall1997 17

ing before calculating the average If one sample volume is much higher or lower than the other two samples then replace the odd sample with a new one Assume you collected three 5-minute samples that weigh 61 64 and 59 oz each The average is 61 3 oz5 min or 1227 ozmin

Practice

Swath tests are best done inishytially using a paved surface such as a parking lot for a practice spray plot because the granules are easshyily seen Blank granules for pracshytice and for your own formulating may be purchased from The Andersons (800-537-3370) and other sources Get 1014 grit if you use Vectobac CG or an equivalent and 58 grit if you use Vectobac G or an equivalent Fill the hopper with a weighed quantity of granules and walk over the plot trying to cover the entire area with an even dosage To determine how much was applied empty the hopper and weigh the material remaining Afshyter a good distribution has been

mast~red move onto a measured field where the terrain is more diffishycult and continue practicing Proshygressively move into more difficult areas as your skill level increases You can get to the point where you know what 5 lbsacre looks like in any habitat and then when you apshyply the real stuff you will know you have done so properly

Assume your practice spray plot is 18 of an acre Therefore to get the proper dose you want to apply 18 of 5 lbs (0625 lbs or 10 oz) to the plot You earlier calculated that your duster is putting out approxishymately 1225 oz per min The calshyculated time to put out the 1 0 oz required to treat the test plot is 082 minutes or49 seconds [determined by dividing 10 ounces by 1225] You also determined that you can treat 121 acreshour at a 2 mph walking speed At that speed you can treat about 16 of an acre in 49 seconds You have three choices to adequately cover your 18 acre practice plot 1) You can walk at your normal speed and apply at a rate slightly higher than 5 lbsacre 2) you can walk a little slower and

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apply at the normal rate or 3) you can decrease the flow rate a bit to achieve the target rate at your norshymal application speed The choice is yours

If you have any questions feel free to contact the authors at Pasco County Mosquito Control District 2308 Marathon Road Odessa Fl 33556 Phone 813-376-4568 Fax 813-376-470 Email pcmcdgtenet

~

Doug middot wassmer _ _Jim middot _ Robinson middotand Jack-Frerich middotmiddot middot are-middot vyith the pascomiddotmiddotc_qun~y middot Mosquito Control bistr_ict middot

middot Odessa middotFiorida middotmiddot-_ middot middot middot _ middot_

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In order to control or eradicate vector-borne disease the world Health Organization launched a substantial program of research on the screening evaluation and deshyvelopment of pesticides for the conshytrol of disease vectors and human pests in the early 1960s This proshygram of research and development continued into the 1970s Various collaboration centers and WHO regional research laboratories were involved in this multiphasic evaluashytion and research program This program was later designated as WHO-PES (WHO Pesticides Evaluation Scheme) which inshycluded laboratory screening of new pesticides and their formulations and finally small-scale and largeshyscale village field trials where effishycacy safety and feasibility of applishycation were studied Additionally whenever possible impact on the level of endemic diseases was also assessed The 41

h phase of this scheme addressed specification of pesticides and their formulations to be used in vector control

The WHO-PES program evenshytually came to a halt in the eighties and with restructuring of the vector Biology and Control Division in WHO this program came to a grinding halt It soon became apshyparent that member countries carshyrying on substantial vector control programs especially mosquito conshytrol operations soon reached the stage when appropriate tools and strategies for use in operational programs became quite scarce Member countries put forward deshymands for the development of more effective and safer chemical and

20 Fa111997

biological control measures To reshyspond to this global demand the Division of Control of Tropical Disshyeases (CTD) at WHO reinvigorated the WHO-PES Program by holding an informal consultation on the Evaluation and Testing of Insectishycides on October 1996 where I was asked to serve as the Chairperson of the consultation Copies of the report of this Consultation can be obtained from Dr Zaim Morteza whose address appears at the end of this article

As a result of the Informal Conshysultation and other discussions held at WHO regarding the future need for public health pesticides CTD recently (1996) launched the GCDPP program This is indeed a crucial program which requires colshylaboration among national and inshyternational agencies research inshystitutions industry and regulatory agencies The main objectives elshyements and scope of this program are briefly discussed below

The main objectives of the GCDPP program are

bull To facilitate the search for alternative pesticides including mishycrobial pesticides as well as applishycation methodologies

bull To advise on the relative priority of activities within the manshydate of GCDPP

bull To advise on issues related to the development and use of pesshyticides and application equipment within the context of WHOs global disease control strategies

bull To promote harmonization of activities related to pesticide deshyvelopment and safe use

bull To promote and encourage the highest quality of work through appropriate resource mobilization

bull GCDPP will serve as an advisory group to CTDWHOPES in matters of pesticide developshyment safe and proper use and apshyplication equipment

Membership and Meetings

A number of agencies organishyzations and manufacturers of pesshyticides and application equipment will become members of GCDPP as well as foundations and WHO Collaborating Centers Other groups and -organizations involved in manufacturing pest manageshyment and crop protection will also be invited Attempts will be made to maximize representation but at the same time ensure appropriate balance In addition to the above distinguished scientists and direcshytors of WHO Regional Offices may also be invited to attend the meetshyings of GCDPP

GCDPP will provide a forum for the exchange of technical informashytion and oversee the WHO-PES biennial plan and collaboration with other organizations and institutions GCDPP will meet every other year in Geneva Switzerland Informal consultation meetings on specific topics will be convened as the need arises CTD will be responsible for the organization of such meetings

continued on page 25

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How many of you know the names Norma Jean Baker Cornelius Magillicutty dichloroshydiphenyl-trichloro-ethane Haliaeetus leucocephalus and its distant relative Taxodium distichum How about Aedes albopictus Well if you are willing to bet $100 you know all six withshyout looking at the answers then you are either very bright very old well read or have too much time on your hands If you know only one I hope its the Asian tiger mosquito What if for the remaining five I gave you the hints of Some Like it Hot baseball legend insecticide whiteshyheaded bird and tree with knees The older ones amongst us and thats getting to be a higher percentshyage each year should recognize Marilyn Monroe and Connie Mack for the first two All of you should be ashamed of yourself if you dont recognized DDT The last two reshylated by name only are Bald Eagle and Bald Cypress If you got both of those you are probably psychic and also know what the point of this article is

And what is the point of this arshyticle the need for common names for mosquitoes Most of us know the birds plants and mammals by their common names Why then must we for the most part use scishyentific names for mosquitoes There are other names that would be more meaningful easier to spell and certainly easier to pronounce Ill bet my $100 right now that 50 of us couldnt spell Toxorhynchites or taeniorhynchus in a spelling bee Thank goodness Aedes abopictus had a catchy common name when

- bull bull -middot ~ bull middot- ~ bull ~ bull

it became established in the US in 1985 Never mind that the common name conjured up all sorts of wrong impressions Asian tiger mosquito was a lot easier for the public and press and I dare say most mosshyquito control practitioners to undershystand and remember Also our friends at the Entomological Socishyety had the accepted common name as Forest Day mosquito but to their credit they changed it to what every one calls it the Asian tiger mosquito

So despite their scientific bent scientists can be influenced to change their minds If common names and abbreviations too didnt have a purpose that is to help us to communicate then we would all be saying too many long boring and confusing sentences Consider the following For years Cornelius Magillicutty sprayed his back yard with dichloro-diphenylshytrichloro-ethane for Aedes abopictus and then years later with Norma Jean Baker at his side watched the thin-shelled eggs of Haliaeetus leucocephalus drop out of 500-year old Taxodium distichum that he loved so much Yawn

Its that kind of phraseology that keeps people including some scishyentists from reading the scientific literature When trying to commushynicate any word or phrase that your listener doesnt know or understand tends to confuse them annoy them or make them feel inferior and that often makes them stop listening Communicating with the public has become a major mosquito control activity in recent years When com-

municating with the public scientific terms and jargon are neither desirshyable or necessary Mosquito control activities can be explained in very simple terms We could use the term Bacillus thuringiensis var israeensis instead of BTl but how many of us do Telling the average person SLE is an arbovirus doesnt give them any more information than telling them its a virus

And whats with this italics stuff for scientific names Ask people (inshycluding you perhaps) why we italishycize scientific names and most will probably guess that its to emphashysis the term Wrong If you care why look it up Lets forget it from now on OK If you cant write Culex quinquefasciatus without italics then consider my alternative-comshymon names that dont need to be italicized

The Entomological Society of America has a committee that conshysiders and usually rejects proshyposed official common names for insects There are only 14 mosshyquitoes on that list and I dare say most of us dont use most of them The problem with this list is that it was developed by scientists and everyone knows that all scientists are mad not just those in the movshyies Scientists want to do things in a scientific manner-logical meshythodical and precise Just because the entomological journals will only let you use accepted common names in their pages doesnt mean we cant use other common names in presentations and io print and we should

Fall1997 23

What we need is a list of comshymon names that the average mosshyquito control practitioner uses No one that anyone takes seriously will say they found some Culex pipiens quinquefasciatus (note no italics) in a polluted pond Most will say quinks Sure we can capitalize Quinks if it makes you feel better it does me So why are we afraid to write Quinks in our reports or say Quinks in formal talks Most people probably dont say quinks (see I dont insist on capitalization) because they think it makes them sound unprofessional Quinks is a distinctive short easy to rememshyber and fun to say name it has a beat that you can dance to and I give it a 99 Does anyone you know call quinks the southern house mosquito the accepted common name How about northern house mosquito for pipiens

Taenies or taenys or whatshyever spelling you want to use is easily recognized by east and south coast mosquito people as the comshymon name for Aedes taeniorhynchus one of the saltmarsh mosquitoes Again its a distinctive short easy to rememshyber and fun name It also describes the size of the species somewhat small or teeny-a bonus And who doesnt use Tox as the common name for our other spelling bee example

We dont hesitate to use comshymon names for a group of mosquishytoes that breed in a particular habishytat In addition to saltmarsh mosshyquitoes we refer to floodwater mosquitoes (which incidently also describes many saltmarsh mosquishytoes) tree hole mosquitoes dirty water mosquitoes grey water mosshyquitoes freshwater mosquitoes container-breeding mosquitoes pasture mosquitoes rock hole mosshyquitoes crab hole mosquitoes and on and on These habitat names are not mutually exclusive For exshyample pasture mosquitoes are also floodwater mosquitoes and fresh-

24 Fall1997

water mosquitoes By the way the translation of floodwater mosquito according to the Entomological Soshyciety is Aedes sticticus What Habitat names are also convenient for discussions among people from different geographic areas For example nature tends to give the same qualities to mosquitoes that breed in tree holes regardless of whether they are tree holes in Calishyfornia Virginia Queensland or Borneo From an operational mosshyquito control standpoint knowing the habitat of the mosquito can be more informative than knowing its scientific name

So lets consider some common names of species that we might use One common pest and potenshytial vector species that needs a common name is Coquillettidia perturbans (I think Ive weaned myself from italics) the aggressive biter whose larvae attach to the roots of aquatic plants particularly cattails (I could have said Typha species) Cattail mosquito is a natural even though larvae may attach to a variety of plants Another name could be the salt and pepshyper mosquito or another name taken from its scientific name could be the perturbing mosquito

How about the Anopheles The accepted common name for Anopheles quadrimaculatus is the common malaria mosquito This may have been accurate when malaria was a problem in this counshytry but now neither malaria nor this mosquito is common in this counshytry Im sure most of our hypothetishycal naming committee made up of operational mosquito controllers would call them quads

We have already dealt with Quinks Another obvious common name for another Culex Cx salinarius is sally or sallys or sallies Culex restuans is a little more tricky but how about rusty Rusty is suggestive of the color of the mosquito and it is similar to

resty a name that just doesnt sound right to me

Aedes vexans a common floodshywater mosquito in much of the US needs a common name The acshycepted common name vexans mosquito would be OK if most people know what vexing means And if they do why not call it the vexing mosquito Calling Aedes aegypti in the US by its accepted name the yellowfever mosquito is misleading Yellow fever has been absent from the US since right after the turn of the century Aegypti or gyps is often used by field and lab workers so why not adopt those terms

I could go on and on but Im more interested in what you think If you will send me your common names (keep it clean please) for any species you are familiar with Ill be happy to compile them and report back in a future article in Wing Beats (Theres that italics again different reason) If they appear in Wing Beats maybe just maybe we can call them official common names You can fax me at 561-778-7204 or E-mail me at cdmognvifas ufledu By the way you can address the message to Charlie Chas or Char The only person I insist call me doctor is my ex-wife and I would rather she didnt call me at all

-C_h~ulie M~rtis middot is an Assoshy _ciate middotPi~fesso( at the Unishy versity ~f floridas Medical Eiitomology Laboratory middot hi middot middot

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continued from page 20

providing support for report prepashyration and other documents and perform secretarial functions

Funding

In order to advance the objecshytives of GCDPP a stable source of funding will be necessary WHO CTD (WHO-Division of Control of Tropical Diseases) will establish and administer a trust fund which will be designated as GCDPP-Trust Fund which will be administered according to the WHO financial rules regulations and practices

The trust fund will be used to convene meetings production and dissemination of documents exshychange and dissemination of inforshymation on the need for public health pesticides and equipment and for activities which will promote the development and use of alternative safe compounds or application equipment

1James of organizations institushytions foundations manufacturers and individuals participating and contributing to this program will be listed Each participant will be enshycouraged to make annual contribushytions to the trust fund

Further Information

For further information on WHOshyPES or GCDPP contact Dr Zaim Morteza WHO-PES CTD World Health Organ ization 1211 Geneva 27 Switzerland E-mail zaimmwhoch

Nlir smiddotMulla is a Profes-sor with the Deparfrilent of ~nt-oshy_mologyUniverslty at califor middot -nia Riversidemiddot CA92521 middot _ middot middot

-

middotMulla= Receives -middot

Recognition Awar(j _

Mir S Mulla Professor of Entoshymology Department of Entomolshyogy University of California Rivershyside CA was presented the Scishyence Society of Thailand~ Meritoshyrious Recognition Award by the Thailand Minister of Science and Technology last October

Mulla an authority on insects of medical and public health imporshytance was cited for his efforts and leadership in organizing the First International Symposium on Biopesticides convened at Naresuan University in Thailand This symposium attended by some 300 participants from 20 countries covered biodiversity safety toxicshyity efficacy and proper use of biopesticides based on natural products and pathogenic organshyisms The proceedings of this first symposium amounting to 300 pages will be published soon

Mulla informs us that the 2nd International Symposium on Biopesticides will be held in late October 1998 on Langkawi Island off the coast of Malaysia Anyone interested in receiving further inforshymation regarding the proceedings or the second symposium should contact Dr Mulla at tel (909) 787-5818 fax (909) 787-4210 and eshymail mulla mailucredu

AMMIA INC ~

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Fall1997 25

Notice Psotophora middotgtcyaneseens collect~d middotin Aiachua County FL

- ~

and 9 pupae of this species were collected by the author from a sunshylit small (ca 2 m diam and 20 em deep) grass-lined pool filled with rainwater at Gainesville Florida

a common identification number with their 41h instar larval and pupal exuviae On subsequent visits to the site no additional Ps cyanescens were collected

Psorophora cyanescens (Coquillett) previously has been reported in Florida from the followshying counties Bay Duval Escambia Gadsden Hillsborough Jackson Leon Okaloosa Suwannee and Union (HT Evans Florida Mosquito Control Handbook 1994) On 26 May 1997 one 4h instar larva

Also collected from the pool were numerous larvae and pupae of Psorophora columbiae (Dyar and Knab) Aedes vexans (Meigen) and Culex salinarius Coquillett and 17 4h instar larvae of Psorophora ciliata (Fabricus) All immatures were individually reared and the resulting adults were linked by

John -Fmiddotmiddoteeinert is with Jlie CeMte(for Medicental middotAgricultural

aridVet$rih~rY Entomology u s ~ Department oFAgricul~umiddotre Agri-

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culture~ 8e$earch Service 1600 1700 SW 23dDrive Gainesvillemiddotmiddot

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Florida 32604 middot middot middot

REGISTRATION FOR WORLD DIRECTORY OF ARTHROPOD VECTOR RESEARCH AND CONTROL SPECIALISTS

In order to update the Directory we would appreciate your completing this form Please type or print and return it to the address listed below We would also appreciate your copying this form and supplyshying it to any colleagues who are working in this field Your cooperation will allow greater communication and efficiency within our profession

Name (Last or family name) (First or given name)

Title of present position ----------- Nationality

Present Address _______________________________ _

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Professional society affiliations AMCA __ SOVE __ ESA __ ASTMH __ RSTMH __ ESC __

Other ______________________ _

Please return by Air Mail to Dr Eugene Gerberg Chairman AMCA International Affairs Committee 5819 NW 57th Way Gainesville FL 32653-3257 USA

Fall1997

Date completed

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Page 6: Wing Beats Volume 8 Number 3wingbeats.floridamosquito.org/Wingbeats/pdfs/Vol8No3.pdf · 2014. 4. 11. · Stan Cope, Norfolk, VA Betsy Field, Vero Beach, FL John Gamble, New Smyrna

[~middot ~-l_m_p~o_rt_a_n_c~e~_] Culex erythrothorax is a comshy

mon pest near thickly vegetated marshes and backwaters in the western United States This mosshyquito exhibits crepuscular peaks in feeding activity as do other co-ocshycurring Culex species such as Culex tarsalis and Culex quinquefasciatus However unlike its congeners Culex erythrothorax

readily feeds during the day parshyticularly if disturbed from the vegshyetation in and surrounding larval developmental sites Although sevshyeral arboviruses have been isolated from field collected Culex erythrothorax throughout its range in the western United States Culex erythrothorax is thought not to play a significant role in arbovirus (St Louis encephalitis and western equine encephalomyelitis viruses) transmission

8 Fall1997

~itt 3()~~-~~ ot The Tule Mosquito

Culex erythrothorJX

[Geographic Di~tribution J

The geographic range of Culex erythrothorax extends from southshyern Idaho to Mexico Specimens have been collected east of the Rocky Mountains in southeastern Colorado and west of the Southshyern High Plains in west Texas This species is common in freshwater marshes in Nevada in Utah and in the foothill and coastal areas of California The western extent of its range is the Channel Islands off the coast of California middot

[ Adult Descmiddotription

The reddish coloration of the thorax readily distinguishes Culex erythrothorax from its congeners Pale basal markings of the abdomishynal terga and the absence of tarshysal banding can be used to sepashyrate this species from nearly all of the other Culex in California exshycept for the pipiens group Hairshylike scutal scales and the narrow yellowish indistinct abdominal bands readily separate Culex erythrothorax from Culex pipiens and Culex quinquefasciatus

~ middotLarval Description J The long narrow siphon the

distribution of hair tufts on the sishyphon and the morphology of lower head hairs distinguish the later inshystars of Culex erythrothorax larvae from larvae of commonly occurring congeners The length of the sishyphon is six to seven times its basal

width The siphonal hairs consist of more than one branch and the third and fourth pair of hairs on the siphon are inserted laterally The remaining three pair of siphonal hairs are inserted ventrally The nurnber of branches of the lower head hairs (group number 6) is inshytermediate among the Culex found in California

Larval Habitat andmiddot Behavior

Larval developmental sites inshyclude freshwater impoundments seeps and ditches that contain stands of tule (bulrush) and cattail vegetated river margins large pershymanent swamps and man-made wetlands containing considerable vegetation Larvae are typically difshyficult to collect by dipping As comshypared to the relative abundance of adults collected by carbon dioxideshybaited traps and by emergence traps Culex erythrothorax is undershyrepresented in larval surveys Onshygoing studies comparing the beshyhavior of Culex erythrothorax larshyvae to co-occurring congeners (Culex tarsal is and Culex quinquefasciatus) indicate that Culex erythrothorax larvae are much more sensitive to physical disturbance (ie shadows and disshyturbance of the water surface) than are larvae of congeners Other asshypects of larval behavior such as diving pattern aggregation attracshytancy to vertical egges etc of Culex erythrothorax also differ apshypreciably from its congeners The

continued on page 11

There have been a lot of changes lately

but NOT WITHmiddot USmiddot ADAPCO still offers the most complete range

of quality products for mosquito control

industrys change Companies grow and expand change their names or close their doors ADAPCO is still the same ol company Our company motto remains the same growth through service with integrity

We continue to support this industry provide the best equipment and chemicals available and continue our research and development to constantly improve our product line

Growth through service with Integrity

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SUSTAI NING MEMBERS OF FMCA amp AMCA

I

_ l ewpoint

I

Were back say P vivax and P faciparum two of the little felshylows in the microbe world that cause malaria

More exotic diseases catch the attention of the media and Hollyshywood - Ebola for example which killed about 250 people in six months in the last outbreak in Afshyrica

Heck we kill 5000 Africans a day our little microbe friends say And were coming back to the United States where we once were very common as recently as the 1930s In fact we never left We just dont get our fair share of the media spotlight Liberal press you know

Globally malaria which is spread by a mosquito kills more than 27 million people a year and sickens about a half-billion

People cau go somewhere pick up au iufectiou aud fly back home loug before the symptoms show up

These and other interesting facts are from a well-written piece in the August issue of Atlantic Monthly by Ellen Ruppel Shell You should read it

10 Fall1997

IVly own trusty Statistical Abshystract of the United States shows that there have been an average of 1 200 cases of malaria per year in the United States for the last six years

Malaria can cause brain damage and is fatal in 10 percent to 50 pershycent of the cases What intrigues me is that we are as happens when societies become irrational workshying at cross-purposes

Environmentalists want to preshyserve swamps and create more They now call them wetlands and they are sacred They are also the places where mosquitoes breed not only those which are carriers of malaria but also those which carry yellow fever (you really dont want old yellow jack to come back) denshygue or breakbone fevermiddot and enshycephalitis

Environmentalists also don t want to spray pesticides But it was the draining of swamps and the spraying of pesticides that ended the terrible toll malaria once exshyacted from Americans

Maybe it would not matter exshycept for global trade immigration illegal immigration tourism and all of the above aggravated by jet travel

People can go somewhere pick up an infection and fly back home long before the symptoms show up People can arrive here full of infecshytion without showing symptoms

Doggone those unintended conshysequences

I dont often look into my crystal ball (its mainly a paperweight) but if I were going to make a long-term bet Id bet that environmental exshytremism is about at the end of its run

Let a few hundred voters die from malaria and I suspect the politicians will suddenly look quite differently on the alleged value of swamps and a no-pesticide policy

Imagine a mini-epidemic of mashylaria or breakbone fever in a major tourist area

Given the number of internashytional visitors and illegal immigrants who do the menial jobs such an epidemic is not that far-fetched

I live in such an area and I can tell you that the murder of just one foreign tourist gives the chamber of commerce the hoteliers the atshytraction owners and even the govshyernor one giant-sized migraine

Imagine what a migraine if 300 or 400 tourists ended up in a hosshypital with a contagious tropical disshyease It would not as they say in flack world be good publicity

It would in fact be terrible pubshylicity because a prospective tourist might reason correctly that the odds of getting shot are slim but the odds of getting bitten by a mosquito during a mostly outdoor vacation are considerably higher They would stay away

continued on page 13

continued from page 8 sensitivity to disturbance and the afshyfinity of Culex erythrothoraxlarvae for vegetation make sampling by dipper very difficult and unreliable

[ Bloodfee~fng middot__ middot_ _ J

Culex erythrothorax is an opporshytunistic feeder which shows a disshytinct east-west cline in feeding prefshyerences In the eastern part of its range individuals collected near Salt Lake City were found to feed primarily on birds In southeastern California engorged individuals were found to feed equally on birds and mammals In much of central and southern California blooded females fed primarily (about 90 of identifiable blood meals) on mammals Rabbits cattle dogs and humans are among the most commonly utilized mammalian hosts

middot middot s~rvival- and middot _ Dispersat ~~ middot

Comparatively good survival of adult females and limited dispersal tendencies are two important facshytors causing large host-seeking populations to develop in the vicinshyity of bulrush marshes At well esshytablished wetlands in southern Calishyfornia it is not uncommon to colshylect between 10000 and 33000 females per C0

2-baited trap per

night during the summer Female survivorship is typically higher than for other co-occuring congeners Compared to other Culex species host-seeking Culex erythrothorax females typically disperse short disshytances Host seeking females are rarely collected more than 2 to 25 kilometers from developmental

sites However local wind condishytions and the availability of hosts may cause large numbers to disshyperse distances greater than 25 km (15 miles) from natal sites The anthropophily of this species could make Culex erythrothorax a distinct pest of humans residing near wetshylands

middot _ BiH Walton is an Assistant Professor with the Dep~_rtment of Entomology- University _ot

middot ~atifo~riia Riverside_cA-92521

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Fall 1997 11

- ~ middot-middot ~

middotmiddot

gt -_middot~Nmiddotews-middot y middotOU Calt middotuse-~ -~-middot-- middot_ middot middot - bull 7 bull bull ~ bull -

Position middot Announcement

MOSQUITO CONTROL MANAGER

HERNANDO COUNTY FL

Responsible for the planning supervision and direct execution of environmental programs operated by the County

REQUIREMENTS Graduation from a 4-year college or university with a degree in entomology or the basic sciences Five years experishyence in the operation of mosquito control or environmental programs Certification in the category of Pubshylic Health Pest Control in conformity with Public Law 92-515 regulating the application of restricted use pesticides in the State of Florida State Certification in the category of Right-of-Way Pest Control State Certification in the category of Aquatic Weed Control Must posshysess and maintain a valid Florida drivers license and be insurable by Countys current insurance carrier

Open until filled Pay Grade 21 0 Salary $321 09annually To receive an application or send a resume write to Hernando County Human Resourses 20 North Main Street Room 260 Brooksville FL 34601 or phone (352)754-4120 EOEAAMF0V and Drug-Free Workplace

12 Fa111997

- middotmiddot-

-middot -

- - ~

Meetings of Interest

FMCA Annual Fall Meeting November 16-20 1997

1997 Annual Fall Meeting of the Florida Mosquito Control Associashytion Radison Ponce de Leon Reshysort in St Augustine FL

For more information contact Shelly Redovan PO Box 60837 Fort Myers FL 33906-0837 Tel (941) 694-2174 Fax (941) 694-6959

Entomological Society of America Annual Meeting December 13-18 1997 Nashville TN

Contact (301) 731-4535 or e-mail meetentosocorg

Info is available on the web at httpwwwentosocorg

MVCAC Annual Conference January 25-28 1998

661h Annual Mosquito and Vecshytor Control Association of Califorshynia Conference Tenaya Lodge Fish Camp California

Contact Don Eliason at Tel (916) 685-2600 Fax (916) 685-1768 e-mail movcacaolcom

WCMVCA Annual Meeting February 19-201998

West Central Mosquito and Vecshytor Control Association meeting at the Grand Vista Hotel in Grand Junction CO

Contact Wayne Kramer at (402)471-0506 for more informashytion

AMCA Annual Meeting March 8-12 1998 John Ascuagas The Nuggett

(800)648-1177 in Sparks Nevada

Contact AMCA Central Office (318) 47 4-2723 for more informashytion

North American Conference on Pesticide Spray Drift Management March 29-April 1 1998 Holiday Inn by the Bay Portland Maine

For further information contact Jim Dill UMCE Pest Management Office 491 College Ave Orono ME 04473-1295 Tel (207) 581-3880 Fax (207) 581-3881

Visit their Web Site at httpwwwstatelleus

agriculturedrift1htm

continued from page 10 All Im suggesting is that we have

put up with extremists and village idiots long enough and wed better settle back into down-to-earth realshyistic work in the fields of public health public safety and governshyment in general Weve allowed the inmates to run the asylum long enough Now its time for a return to normal behavior normal actions and sensible science

Daffy ideas and ideology notshywithstanding if you play around with nature it will kill you -~

~charley Ree~e i$ ~ middot synCti middot -cated columnist with the _ Orla~dQ _Sentinel lie _can ~e reached __ by email at middot -

middot - OSOre~se~aol_corn -- middot -~ middot copy 1997~ Klt-_G FEA_TURE middotsvNDICATE-INC-middot

- Editorsmiddot_Vote-Themiddot previ6middotus articent1~ - w$smiddot i ri ~~

eluded-to sHmul~te tllowght middotandmiddot hopefully elicit a -response from our readers middot- Wel i ltludn~i our -editorial procentessmiddot it was brought to my atten-middot tion -f~at a responsemiddot _to this-article had-alreadY be-E3ri submitted to __ the Orlando -sentineL - instead of pub Hshingmiddot this response lnih~ ~next i5sue of WingBeats 1-chose middotto ind~demiddot it akgtrig wi_th tflis articlemiddot -to _provfde another viewpoint wmiddotIJich -rnay h~lp to-correct a few oftlie inaccuracies

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-- Bothmiddot vlewpbi nts_~app~eEtr as stJbmitted- _without middot edjthig middot as shotild any y iewpoiot middotmiddot -lt middot -

-- If youmiddot 1yOUidJiketQ CXgtmirleht on

this -artiCle _ or any other serid your re~porise tq middot

Dennis Moore middot P-O Box -66oo5 middot

middotFort Myers Fl_ middot33906 middot middot Tel 941~694~2174 --- middotmiddot

middot Fax 941--694-695S middot -middot e~mail rnooredniailcimsstatefLIls

-middot_~esporise middot tr middot_ VlewpointColumn middot

Charlie Reeses August 14th colshyumn proclaims that the preservashytion of wetlands and the reduction of pesticide spraying near these areas will in the near futu re lead to many cases of malaria and other diseases He states that this is environmental extremism and not realistic

Unfortuntely his sensible scishyence lacks the support of actual facts For instance the 1 200 cases of malaria per year in the United States for the past six years are almost all imported cases conshytracted in other countries where conditions are more conducive to transmission Only a handful of malaria cases transmitted within the states have been recorded within the last 40 years Although the draining of swamps and spraying of pesticides did play a role in the reduction of malaria in Florida they were only a portion of the solution Window and door screenings coupled with the spread of air conshyditioning throughout Florida played a large role in keeping mosquitoes out of houses where pesticides couldnt reach

Furthermore the mosquitoes that transmit yellow fever and dengue do not breed in swamps but in small containers (such as flower pots and rain gutters) scattered thoughout every neighborhood Pesticides are often ineffectual against these urban mosquitoes So window screening again played a major role in reducing these two diseases in Florida

Although wetlands are the known breeding grounds for many mosquitoes manipulated wetlands such as rice fields in Texas orange groves cattle pastures and cane fields in Florida actually pose a much larger threat to people in

terms of producing large numbers of disease vectors The alleged value of swamps that Mr Reese mentions lies in the functions of rain and stormwater collection and disshypersal Without such wetlands rain must go somewhere and many low-lying agricultural areas such as rice fields and orange groves turn into mosquito breeding grounds

Draining swamps and spraying pesticides are not a magic bullet for mosquito and disease control Reliance on these methods alone has taught mosquito control and health officials harsh lessons Mosshyquitoes and the diseases they spread have complicated life cycles which can intertwine with our own socioeconomic cycles

Mr Reese should contact the village idiots and extremist who work daily in mosqito control to learn the facts The difficult task of controlling mosquitoes in Florida is an ongoing challenge We have learned from others that have failed to utilize multiple control methods and relied too heavily upon one method

Pesticide resistance of malarial mosquitoes presents a real danger to public health For example the over-use of DDT for malaria conshytrol as well as crop protection in Sri Lanka failed to prevent the disease and resulted in over 400000 cases of malaria in 1975 Cotton farmers in El Salvador and Guatemala have been drenching their fields with every known insecticide These actions have produced malaria mosquitoes resistant to all chemishycals Mr Reese is right on one count If you fool around with nashyture it can kill you

middot- -zach --Prumiddotsa_~ ~Enviroomental middot As$9ciate and Fred Harderi -CQri$Jitan_t_ are with middott_ll_e Reedy middotmiddot Creek lniproverrientDistrict in -

middotmiddot Lake Buena vlst~ - FL middot- middot middot

Fal11997 13

9eat~te Applyitlg iarvietdes middot Forntulated middot With ~Dty Carriers middot middotmiddot middotmiddot middot bullmiddotmiddotmiddotbull middot

bullbull middotmiddot by J)~1f)~-~~~afladl~

Most modern mosquito control operations include larviciding as an integral part of their pest manageshyment practices Mosquito larvicides are available in a wide range of types and formulations Dry formushylations include briquets granules and pellets

Formulations usually are applied directly out of the container genershyally with no need for mixing Some sand formulations may be made on site by following instructions proshyvided on the labels There is usushyally a range of rates for each forshymulation to cover different habitats and water quality depth movement and organic content plus other facshytors discussed on product labels

Selecting the formulation and application rate that gives you the best coverage for your larval habishytats requires some thought Dryshyformulated larvicides may be apshyplied by hand with ground equipshyment and by air In this article we focus on ground applications and calibration as we have in the previshyous two articles in this series

Calibration is an encompassing principal that includes

1 determining what insecticide formulation to use

2 the rate of toxicant per acre to apply

3 the total spray volume needed to use to get good coverage

4 determining (or setting) the flow through the nozzle

5 determining the effective swath width and if appropriate the walking pace of application

14 Fall1997

After these parameters are set the applicators should practice by spraying a measured area against the clock Through practice the applicator will develop visual cues and hand-eye coordination which leads to standardizing hisher covshyerage per minute These factors apply to granular blowers horn seeders and other dry formula apshyplication tools including aerial spreaders

Choosing The Formulation

The three active ingredients most commonly used in dry larvishycide formulations are temephos sshymethoprene and delta-endotoxin (Bti) All three may be mixed with plaster (eg Altosid Briquetsreg Altosid XR Briquetsreg Altosid Pelshyletsreg and 5 Skeeter Abatereg) with food substances (Bactimos Pelshyletsreg) or with cork (Bactimos Brishyquetsreg) They also may be attached to ground-up corncob (eg Vectobac Greg and Vectobac CGreg) paper pulp waste material (eg Abadac which is liquid Abate plus Biodacreg Aitodac which is Altosid Liquid Larvicidereg plus Biodac) or sand (eg 1 Skeeter Abatereg LarvXSGreg and Aitosand which is Altosid Liquid Larvicide plus sand) Briquets generally are designed for use at rates ranging from 1 per 200 square feet (218 per acre) to 1 per 25 square feet (1742 per acre) A typical application rate is 1 per 1 00 square feet (436 per acre) in many situations Some granular products may be applied at up to 20 lbs per

acre but applicators typically used 5-10 lbs per acre

Briquets and pellets slowly reshylease toxicants to provide sustained control for one or more months The Bti toxicants are stomach poisons which must be placed in that part of the water column where the tarshyget larvae feed S-methoprene and temephos are contact poisons which mix with the entire water column Bactimos Briquets which float are primarily a mixture of Bti and cork and are often staked in place to prevent their being moved by wind waves and animals Altosid Briquets Altosid XR Brishyquets Altosid Pellets and Skeeter Abate Pelletsreg are made with plasshyter and sink to the bottom Some mosquito control agencies place briquets in fine wire mesh baskets and suspend them in storm drains just above the bottom so they are not swept away or buried Sand formulations also sink but a new Bti formulation LarvXsg is coated with vermiculite which reshyleases and carries the Bti back to the surface from which it is reshyleased Some Bti corncob granshyules in each bag will float while othshyers may sink This is also true for formulations using Biodac as a carshyrier

Briquets are most commonly dispensed by hand but Clarke Equipment Companys Arrow Gunreg is sometimes used to broadcast Altosid Briquets but not Bactimos Briquets The Arrow Gun uses compressed air captured from a non-thermal ULV aerosol generashytor to propel briquets down its barshyrel It may be used for lobbing one

or a few briquets into isolated small pools where placement is not a critishycal issue both in terms of cost and eHiciency Applicators may also use a slingshot The Arrow Gun works very well for applying pellet ground corn cob and other granushylar carrier formulations in large amounts In order for the equipment to be used properly as with any application equipment it must first be calibrated

Figure 1 shows release rates for Altosid Briquets Altosid XR Brishyquets and Altosid Pellets These curves are adapted from an article by Dr Doug Ross et a called Methoprene concentrations in freshwater microcosms treated with sustained-release Altosid formulashytions (Mosquito News 1994 Vol 1 0(2 pt 1 pp 202-21 0 They are indirect measures of release rates derived by measuring the concenshytration of active ingredients in the water Notice that the AI is not reshyleased uniformly throughout the active life of the formulations Conshysider this when you are larviciding We suspect that most solid larvishycides have characteristic release rate curves but we are not aware of any published descriptions If we could tap into the EPAs confidenshytial data files we might be able to find out more about this topic

In a large rectangular area usshying a 1 briquet1 00 sq ft applicashytion rate if briquets are placed in the recommended 1 0 foot intervals in even rows the maximum (diagoshynal) distance between two adjacent briquets is a little over 14 feet Imagshyine a square with a briquet in each corner and mosquito larvae in the center a little over 7 ft from each briquet To decrease the maximum diagonal distance between briquets to 1 0 feet while still placing briquets every 10 feet in rows stagger the rows so the briquets in the second row are between the briquets in the first row Materials science tells us this is the most efficient spacing scheme We recommend practic-

ing briquet placement in a mowed yard prior to actual field work This will allow you to get your spacing right Monroe County (Florida) Mosquito Control District field pershysonnel typically hand-apply over 20000 Altosid Briquets every year by walking their breeding sites with a 2 gallon pail full of product

STAGGERED X X X

X X X

X X X

ABREAST

X X X

X X X

X X X

Another problematic situation occurs when treating a narrow ditch If a ditch averages 8 feet wide you would apply a briquet every 125 linear feet to get the 1 briquet per 1 00 sq feet If the ditch averaged 2 feet wide you would apply one briquet for every 50 linshyear feet In the case of a narrow ditch and in the absence of any external mixing forces such as wind or water flow the concentrashytion will be higher than expected adjacent to the briquet because the toxicants cannot disperse equal distances in all directions In addition the concentration of AI at the center point between adjacent briquets may be below the lethal dose Exposure of mosquito larvae to sublethal doses may result in resistance to the AI If the water is flowing the problem is solved but you may get accelerated briquet erosion Altosid Briquet labels provide instructions for treatshyments in moving water

East Volusia Mosquito Control District (Florida) developed a method to apply a whole seasons worth of Altosid (30-day) Briquets

-ltgt-BRIQUETS

10 15 20 25 30 35

-0- XR BRIQUETS

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DAYS AFTER APPLICATION

Figure 1

Release rates for Altosid Briquets altosid XR Briquits and Altosid Pellets

Fall1997 15

at one time They cap a 6-8 inch section of 1-inch ID PVC pipe atshytach this (cap-side up) to an alumishynum stake (packing tape works great) and drill a 38 inch hole through it at the other end Brishyquets are inserted into the cylinder sometimes with color coded poker chips as spacers and a wire is run through the hole (or the stake is bent inward) to prevent the briquets from falling out prematurely The stake is driven into the bottom at the breeding site As the breeding site is flooded the bottom briquet erodes away releasing AI Trapped air prevents water from reaching the other briquets Another briquet falls down to take its place when it is about gone A field inspector can count poker chips to see how many Altosid Briquets have been used up

When bottom contours are highly irregular and the water depth is shallow and decreasing you may

not want to use briquet formulations at all Consider whether or not the briquet will ever be isolated from any part of the intended treatment area during its active life If so larshyvae may escape control efforts The amount of carrier material used can dictate the quality of control you achieve and is a very important consideration Unless we formulate our own pesticides we must work with a fixed amount of toxicant per pound as determined b~middot the manushyfacturer for an average situation Wouldnt it be nice to have a series of dry formulations based on the same AI that best fit different situashytions

Consider Figure 2 for a moment It shows the approximate average number of particles per square yard for four different carriers This graph is the result of investigations by students attending the weekshylong Florida Mosquito Control Asshysociation Dodd Short Courses on

Larviciding during 1996 and 1997 plus the work of Pasco CMCDs John Schaediger who washed and counted thousands of grains of sand Notice that 6 pounds of Biodac1200 contain about the same number of particles as 1 0 lbs of 1 014 grit corn cob If you have determined that 1 0 lbs of Vectobac CG (which uses 1 014 grit corn cob) is the correct application rate for you then perhaps 6 pounds of Biodac 1200 formulated with the same amount of Bti will do the same job and save you 40 in weight At these rates they both contain approximately the same number of carrier particles per pound The weight difference could increase the economics of aerial application where the lower weight translates into more acres per payshyload per flight

We apply 75 lbs of granulated 1 014 grit corncob per acre as our base rate This includes both in-

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Fall1997

4

daC 1200 BlO

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5 6

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7

58 corncob

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house mixes of blank granules with active ingredients and commercially finished products The 75 lbs is not just a figure that has been pulled out of the sky but one that many trials and observations have shown to be necessary to get good coverage with a variety of bottom contours and vegetation types You may need a different base rate When field personnel are conshyfronted with heavy detritus or vegshyetation aggregated larvae or a preponderance of late in star larvae they can then increase their applishycation by slowing down their pace or narrowing the swath to raise the dosage of pesticide (remembering to stay within the maximum labeled rate)

Whatever the formulation the proper application is critical to the efficiency and effectiveness of your program Larvicide labels comshymonly include only very general guidelines for application techshyniques or equipment selection This latitude allows applicators and technical staffs to choose a system that works best for their circumshystances A granular label notes the material should be applied unishyformly in conventional aerial and ground equipment

Equipment Calibration

Equipment calibrations are imshyportant for the effectiveness of your operation Consistency is born out of practice on top of more practice Failures of larvicides are often atshytributed to missed areas caused by poor applications Calibrating flows on dry application equipment is done either by timing how long it takes for a known amount to pass through the unit or by collecting all the material blown from the nozzle for a fixed period of time and then weighing it Either should be done by two people one that handles the machine and one that does the timshying The collection method retains

the material for subsequent tests but may restrict the flow on certain machines Machines with powershyful air blasts can only be checked by timing the discharge of a known quantity

Knowledge of the flow rate and of factors affecting it are critical to calibration The most common powshyered ground equipment used for dry applications is the gasolineshyengined backpack mistblower duster The units are capable of providing even coverage good throw and are simple to use They typically broadcast granules in a 40-60 ft swath width with the operator walking at 1-3 miles per hour This translates to 5-20 acres per hour of spray time Several things can be done to change the flow rate with the nozzle orifice or disc as the primary determinate Changing the pressure will also change the flow but to a much lesser degree and it has other side effects Some power dusters have movable grates that regulate flow over the normal opshyerating range Some brands have a series of replaceable orifice discs that allow discharge rate changes in small steps Blower speed also affects the throw but that should have marginal effect on the disshycharge rate

Other ground equipment that may be used include crank slinger seeders horn seeders and modishyfied ULV equipment (eg Arrow Guns mentioned above) The flow of spinning disc spreaders or othshyers with a mechanical agitator may be somewhat affected by the opshyerational speed Horn seeders which have about a 20 ft swath width when applying Bti granules are often used by our field personshynel to treat small sites They have replaced the Dipper and Bucket method where an applicator fills a dipper from a bucket of granules and then carefully and evenly broadcasts them

An Example

Assume you have determined that you can comfortably apply B ti corncob granules in 50ft swaths at 2 mph (121 acreshour) using a duster and you want to apply them at 25 to 10 lbsacre To get proper coverage in typical vegetation you will use 5 lbsacre and when conshyfronted with adverse conditions you may double or in this case with a maximum label rate of 20 lbs acre quadruple the application to get the proper dosage of pesticide to the insect

Fill the hopper with granules making sure not to get any pieces of paper or other debris mixed into the product If the unit is equipped with an air agitation system make sure that it is operational Start the engine and make sure that the granules are free flowing through the nozzle If the unit is equipped with an adjustable gate style regushylator center it for an initial trial Close the flow control For collectshying granules you need a nylon stocking and a scale that measures to ounces or grams Place the stocking over the discharge tube and secure it with a rubber band The stocking should be supported so it wont pinch the air flow off Run the blower up to speed and then open the flow valve as you start timing Have the operator open the valve as the stop watch is started

Because of the very low flows (small quantities) of granules needed take a sample over a given period in the 3-5 minute range Shut the flow off as the timer notes the end of the period Pull the colshylection into the bottom of the stockshying and remove it from the nozzle Place another stocking on the duster and collect a second sample and then a third sample Collect at least three samples weigh each and average the results Be sure to subtract the weight of the stock-

Fall1997 17

ing before calculating the average If one sample volume is much higher or lower than the other two samples then replace the odd sample with a new one Assume you collected three 5-minute samples that weigh 61 64 and 59 oz each The average is 61 3 oz5 min or 1227 ozmin

Practice

Swath tests are best done inishytially using a paved surface such as a parking lot for a practice spray plot because the granules are easshyily seen Blank granules for pracshytice and for your own formulating may be purchased from The Andersons (800-537-3370) and other sources Get 1014 grit if you use Vectobac CG or an equivalent and 58 grit if you use Vectobac G or an equivalent Fill the hopper with a weighed quantity of granules and walk over the plot trying to cover the entire area with an even dosage To determine how much was applied empty the hopper and weigh the material remaining Afshyter a good distribution has been

mast~red move onto a measured field where the terrain is more diffishycult and continue practicing Proshygressively move into more difficult areas as your skill level increases You can get to the point where you know what 5 lbsacre looks like in any habitat and then when you apshyply the real stuff you will know you have done so properly

Assume your practice spray plot is 18 of an acre Therefore to get the proper dose you want to apply 18 of 5 lbs (0625 lbs or 10 oz) to the plot You earlier calculated that your duster is putting out approxishymately 1225 oz per min The calshyculated time to put out the 1 0 oz required to treat the test plot is 082 minutes or49 seconds [determined by dividing 10 ounces by 1225] You also determined that you can treat 121 acreshour at a 2 mph walking speed At that speed you can treat about 16 of an acre in 49 seconds You have three choices to adequately cover your 18 acre practice plot 1) You can walk at your normal speed and apply at a rate slightly higher than 5 lbsacre 2) you can walk a little slower and

BVA

apply at the normal rate or 3) you can decrease the flow rate a bit to achieve the target rate at your norshymal application speed The choice is yours

If you have any questions feel free to contact the authors at Pasco County Mosquito Control District 2308 Marathon Road Odessa Fl 33556 Phone 813-376-4568 Fax 813-376-470 Email pcmcdgtenet

~

Doug middot wassmer _ _Jim middot _ Robinson middotand Jack-Frerich middotmiddot middot are-middot vyith the pascomiddotmiddotc_qun~y middot Mosquito Control bistr_ict middot

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In order to control or eradicate vector-borne disease the world Health Organization launched a substantial program of research on the screening evaluation and deshyvelopment of pesticides for the conshytrol of disease vectors and human pests in the early 1960s This proshygram of research and development continued into the 1970s Various collaboration centers and WHO regional research laboratories were involved in this multiphasic evaluashytion and research program This program was later designated as WHO-PES (WHO Pesticides Evaluation Scheme) which inshycluded laboratory screening of new pesticides and their formulations and finally small-scale and largeshyscale village field trials where effishycacy safety and feasibility of applishycation were studied Additionally whenever possible impact on the level of endemic diseases was also assessed The 41

h phase of this scheme addressed specification of pesticides and their formulations to be used in vector control

The WHO-PES program evenshytually came to a halt in the eighties and with restructuring of the vector Biology and Control Division in WHO this program came to a grinding halt It soon became apshyparent that member countries carshyrying on substantial vector control programs especially mosquito conshytrol operations soon reached the stage when appropriate tools and strategies for use in operational programs became quite scarce Member countries put forward deshymands for the development of more effective and safer chemical and

20 Fa111997

biological control measures To reshyspond to this global demand the Division of Control of Tropical Disshyeases (CTD) at WHO reinvigorated the WHO-PES Program by holding an informal consultation on the Evaluation and Testing of Insectishycides on October 1996 where I was asked to serve as the Chairperson of the consultation Copies of the report of this Consultation can be obtained from Dr Zaim Morteza whose address appears at the end of this article

As a result of the Informal Conshysultation and other discussions held at WHO regarding the future need for public health pesticides CTD recently (1996) launched the GCDPP program This is indeed a crucial program which requires colshylaboration among national and inshyternational agencies research inshystitutions industry and regulatory agencies The main objectives elshyements and scope of this program are briefly discussed below

The main objectives of the GCDPP program are

bull To facilitate the search for alternative pesticides including mishycrobial pesticides as well as applishycation methodologies

bull To advise on the relative priority of activities within the manshydate of GCDPP

bull To advise on issues related to the development and use of pesshyticides and application equipment within the context of WHOs global disease control strategies

bull To promote harmonization of activities related to pesticide deshyvelopment and safe use

bull To promote and encourage the highest quality of work through appropriate resource mobilization

bull GCDPP will serve as an advisory group to CTDWHOPES in matters of pesticide developshyment safe and proper use and apshyplication equipment

Membership and Meetings

A number of agencies organishyzations and manufacturers of pesshyticides and application equipment will become members of GCDPP as well as foundations and WHO Collaborating Centers Other groups and -organizations involved in manufacturing pest manageshyment and crop protection will also be invited Attempts will be made to maximize representation but at the same time ensure appropriate balance In addition to the above distinguished scientists and direcshytors of WHO Regional Offices may also be invited to attend the meetshyings of GCDPP

GCDPP will provide a forum for the exchange of technical informashytion and oversee the WHO-PES biennial plan and collaboration with other organizations and institutions GCDPP will meet every other year in Geneva Switzerland Informal consultation meetings on specific topics will be convened as the need arises CTD will be responsible for the organization of such meetings

continued on page 25

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How many of you know the names Norma Jean Baker Cornelius Magillicutty dichloroshydiphenyl-trichloro-ethane Haliaeetus leucocephalus and its distant relative Taxodium distichum How about Aedes albopictus Well if you are willing to bet $100 you know all six withshyout looking at the answers then you are either very bright very old well read or have too much time on your hands If you know only one I hope its the Asian tiger mosquito What if for the remaining five I gave you the hints of Some Like it Hot baseball legend insecticide whiteshyheaded bird and tree with knees The older ones amongst us and thats getting to be a higher percentshyage each year should recognize Marilyn Monroe and Connie Mack for the first two All of you should be ashamed of yourself if you dont recognized DDT The last two reshylated by name only are Bald Eagle and Bald Cypress If you got both of those you are probably psychic and also know what the point of this article is

And what is the point of this arshyticle the need for common names for mosquitoes Most of us know the birds plants and mammals by their common names Why then must we for the most part use scishyentific names for mosquitoes There are other names that would be more meaningful easier to spell and certainly easier to pronounce Ill bet my $100 right now that 50 of us couldnt spell Toxorhynchites or taeniorhynchus in a spelling bee Thank goodness Aedes abopictus had a catchy common name when

- bull bull -middot ~ bull middot- ~ bull ~ bull

it became established in the US in 1985 Never mind that the common name conjured up all sorts of wrong impressions Asian tiger mosquito was a lot easier for the public and press and I dare say most mosshyquito control practitioners to undershystand and remember Also our friends at the Entomological Socishyety had the accepted common name as Forest Day mosquito but to their credit they changed it to what every one calls it the Asian tiger mosquito

So despite their scientific bent scientists can be influenced to change their minds If common names and abbreviations too didnt have a purpose that is to help us to communicate then we would all be saying too many long boring and confusing sentences Consider the following For years Cornelius Magillicutty sprayed his back yard with dichloro-diphenylshytrichloro-ethane for Aedes abopictus and then years later with Norma Jean Baker at his side watched the thin-shelled eggs of Haliaeetus leucocephalus drop out of 500-year old Taxodium distichum that he loved so much Yawn

Its that kind of phraseology that keeps people including some scishyentists from reading the scientific literature When trying to commushynicate any word or phrase that your listener doesnt know or understand tends to confuse them annoy them or make them feel inferior and that often makes them stop listening Communicating with the public has become a major mosquito control activity in recent years When com-

municating with the public scientific terms and jargon are neither desirshyable or necessary Mosquito control activities can be explained in very simple terms We could use the term Bacillus thuringiensis var israeensis instead of BTl but how many of us do Telling the average person SLE is an arbovirus doesnt give them any more information than telling them its a virus

And whats with this italics stuff for scientific names Ask people (inshycluding you perhaps) why we italishycize scientific names and most will probably guess that its to emphashysis the term Wrong If you care why look it up Lets forget it from now on OK If you cant write Culex quinquefasciatus without italics then consider my alternative-comshymon names that dont need to be italicized

The Entomological Society of America has a committee that conshysiders and usually rejects proshyposed official common names for insects There are only 14 mosshyquitoes on that list and I dare say most of us dont use most of them The problem with this list is that it was developed by scientists and everyone knows that all scientists are mad not just those in the movshyies Scientists want to do things in a scientific manner-logical meshythodical and precise Just because the entomological journals will only let you use accepted common names in their pages doesnt mean we cant use other common names in presentations and io print and we should

Fall1997 23

What we need is a list of comshymon names that the average mosshyquito control practitioner uses No one that anyone takes seriously will say they found some Culex pipiens quinquefasciatus (note no italics) in a polluted pond Most will say quinks Sure we can capitalize Quinks if it makes you feel better it does me So why are we afraid to write Quinks in our reports or say Quinks in formal talks Most people probably dont say quinks (see I dont insist on capitalization) because they think it makes them sound unprofessional Quinks is a distinctive short easy to rememshyber and fun to say name it has a beat that you can dance to and I give it a 99 Does anyone you know call quinks the southern house mosquito the accepted common name How about northern house mosquito for pipiens

Taenies or taenys or whatshyever spelling you want to use is easily recognized by east and south coast mosquito people as the comshymon name for Aedes taeniorhynchus one of the saltmarsh mosquitoes Again its a distinctive short easy to rememshyber and fun name It also describes the size of the species somewhat small or teeny-a bonus And who doesnt use Tox as the common name for our other spelling bee example

We dont hesitate to use comshymon names for a group of mosquishytoes that breed in a particular habishytat In addition to saltmarsh mosshyquitoes we refer to floodwater mosquitoes (which incidently also describes many saltmarsh mosquishytoes) tree hole mosquitoes dirty water mosquitoes grey water mosshyquitoes freshwater mosquitoes container-breeding mosquitoes pasture mosquitoes rock hole mosshyquitoes crab hole mosquitoes and on and on These habitat names are not mutually exclusive For exshyample pasture mosquitoes are also floodwater mosquitoes and fresh-

24 Fall1997

water mosquitoes By the way the translation of floodwater mosquito according to the Entomological Soshyciety is Aedes sticticus What Habitat names are also convenient for discussions among people from different geographic areas For example nature tends to give the same qualities to mosquitoes that breed in tree holes regardless of whether they are tree holes in Calishyfornia Virginia Queensland or Borneo From an operational mosshyquito control standpoint knowing the habitat of the mosquito can be more informative than knowing its scientific name

So lets consider some common names of species that we might use One common pest and potenshytial vector species that needs a common name is Coquillettidia perturbans (I think Ive weaned myself from italics) the aggressive biter whose larvae attach to the roots of aquatic plants particularly cattails (I could have said Typha species) Cattail mosquito is a natural even though larvae may attach to a variety of plants Another name could be the salt and pepshyper mosquito or another name taken from its scientific name could be the perturbing mosquito

How about the Anopheles The accepted common name for Anopheles quadrimaculatus is the common malaria mosquito This may have been accurate when malaria was a problem in this counshytry but now neither malaria nor this mosquito is common in this counshytry Im sure most of our hypothetishycal naming committee made up of operational mosquito controllers would call them quads

We have already dealt with Quinks Another obvious common name for another Culex Cx salinarius is sally or sallys or sallies Culex restuans is a little more tricky but how about rusty Rusty is suggestive of the color of the mosquito and it is similar to

resty a name that just doesnt sound right to me

Aedes vexans a common floodshywater mosquito in much of the US needs a common name The acshycepted common name vexans mosquito would be OK if most people know what vexing means And if they do why not call it the vexing mosquito Calling Aedes aegypti in the US by its accepted name the yellowfever mosquito is misleading Yellow fever has been absent from the US since right after the turn of the century Aegypti or gyps is often used by field and lab workers so why not adopt those terms

I could go on and on but Im more interested in what you think If you will send me your common names (keep it clean please) for any species you are familiar with Ill be happy to compile them and report back in a future article in Wing Beats (Theres that italics again different reason) If they appear in Wing Beats maybe just maybe we can call them official common names You can fax me at 561-778-7204 or E-mail me at cdmognvifas ufledu By the way you can address the message to Charlie Chas or Char The only person I insist call me doctor is my ex-wife and I would rather she didnt call me at all

-C_h~ulie M~rtis middot is an Assoshy _ciate middotPi~fesso( at the Unishy versity ~f floridas Medical Eiitomology Laboratory middot hi middot middot

Verq Beach Fiorida~

continued from page 20

providing support for report prepashyration and other documents and perform secretarial functions

Funding

In order to advance the objecshytives of GCDPP a stable source of funding will be necessary WHO CTD (WHO-Division of Control of Tropical Diseases) will establish and administer a trust fund which will be designated as GCDPP-Trust Fund which will be administered according to the WHO financial rules regulations and practices

The trust fund will be used to convene meetings production and dissemination of documents exshychange and dissemination of inforshymation on the need for public health pesticides and equipment and for activities which will promote the development and use of alternative safe compounds or application equipment

1James of organizations institushytions foundations manufacturers and individuals participating and contributing to this program will be listed Each participant will be enshycouraged to make annual contribushytions to the trust fund

Further Information

For further information on WHOshyPES or GCDPP contact Dr Zaim Morteza WHO-PES CTD World Health Organ ization 1211 Geneva 27 Switzerland E-mail zaimmwhoch

Nlir smiddotMulla is a Profes-sor with the Deparfrilent of ~nt-oshy_mologyUniverslty at califor middot -nia Riversidemiddot CA92521 middot _ middot middot

-

middotMulla= Receives -middot

Recognition Awar(j _

Mir S Mulla Professor of Entoshymology Department of Entomolshyogy University of California Rivershyside CA was presented the Scishyence Society of Thailand~ Meritoshyrious Recognition Award by the Thailand Minister of Science and Technology last October

Mulla an authority on insects of medical and public health imporshytance was cited for his efforts and leadership in organizing the First International Symposium on Biopesticides convened at Naresuan University in Thailand This symposium attended by some 300 participants from 20 countries covered biodiversity safety toxicshyity efficacy and proper use of biopesticides based on natural products and pathogenic organshyisms The proceedings of this first symposium amounting to 300 pages will be published soon

Mulla informs us that the 2nd International Symposium on Biopesticides will be held in late October 1998 on Langkawi Island off the coast of Malaysia Anyone interested in receiving further inforshymation regarding the proceedings or the second symposium should contact Dr Mulla at tel (909) 787-5818 fax (909) 787-4210 and eshymail mulla mailucredu

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Notice Psotophora middotgtcyaneseens collect~d middotin Aiachua County FL

- ~

and 9 pupae of this species were collected by the author from a sunshylit small (ca 2 m diam and 20 em deep) grass-lined pool filled with rainwater at Gainesville Florida

a common identification number with their 41h instar larval and pupal exuviae On subsequent visits to the site no additional Ps cyanescens were collected

Psorophora cyanescens (Coquillett) previously has been reported in Florida from the followshying counties Bay Duval Escambia Gadsden Hillsborough Jackson Leon Okaloosa Suwannee and Union (HT Evans Florida Mosquito Control Handbook 1994) On 26 May 1997 one 4h instar larva

Also collected from the pool were numerous larvae and pupae of Psorophora columbiae (Dyar and Knab) Aedes vexans (Meigen) and Culex salinarius Coquillett and 17 4h instar larvae of Psorophora ciliata (Fabricus) All immatures were individually reared and the resulting adults were linked by

John -Fmiddotmiddoteeinert is with Jlie CeMte(for Medicental middotAgricultural

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Telephone (Work) _____ (Home) _____ Fax ______ E-mail _______ _

DEGREES DATE UNIVERSITY

Languages understood Specialty ------------

Professional society affiliations AMCA __ SOVE __ ESA __ ASTMH __ RSTMH __ ESC __

Other ______________________ _

Please return by Air Mail to Dr Eugene Gerberg Chairman AMCA International Affairs Committee 5819 NW 57th Way Gainesville FL 32653-3257 USA

Fall1997

Date completed

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Page 7: Wing Beats Volume 8 Number 3wingbeats.floridamosquito.org/Wingbeats/pdfs/Vol8No3.pdf · 2014. 4. 11. · Stan Cope, Norfolk, VA Betsy Field, Vero Beach, FL John Gamble, New Smyrna

There have been a lot of changes lately

but NOT WITHmiddot USmiddot ADAPCO still offers the most complete range

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industrys change Companies grow and expand change their names or close their doors ADAPCO is still the same ol company Our company motto remains the same growth through service with integrity

We continue to support this industry provide the best equipment and chemicals available and continue our research and development to constantly improve our product line

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E-MAIL adapco missketacom ADAPCOs Miss Keta

SUSTAI NING MEMBERS OF FMCA amp AMCA

I

_ l ewpoint

I

Were back say P vivax and P faciparum two of the little felshylows in the microbe world that cause malaria

More exotic diseases catch the attention of the media and Hollyshywood - Ebola for example which killed about 250 people in six months in the last outbreak in Afshyrica

Heck we kill 5000 Africans a day our little microbe friends say And were coming back to the United States where we once were very common as recently as the 1930s In fact we never left We just dont get our fair share of the media spotlight Liberal press you know

Globally malaria which is spread by a mosquito kills more than 27 million people a year and sickens about a half-billion

People cau go somewhere pick up au iufectiou aud fly back home loug before the symptoms show up

These and other interesting facts are from a well-written piece in the August issue of Atlantic Monthly by Ellen Ruppel Shell You should read it

10 Fall1997

IVly own trusty Statistical Abshystract of the United States shows that there have been an average of 1 200 cases of malaria per year in the United States for the last six years

Malaria can cause brain damage and is fatal in 10 percent to 50 pershycent of the cases What intrigues me is that we are as happens when societies become irrational workshying at cross-purposes

Environmentalists want to preshyserve swamps and create more They now call them wetlands and they are sacred They are also the places where mosquitoes breed not only those which are carriers of malaria but also those which carry yellow fever (you really dont want old yellow jack to come back) denshygue or breakbone fevermiddot and enshycephalitis

Environmentalists also don t want to spray pesticides But it was the draining of swamps and the spraying of pesticides that ended the terrible toll malaria once exshyacted from Americans

Maybe it would not matter exshycept for global trade immigration illegal immigration tourism and all of the above aggravated by jet travel

People can go somewhere pick up an infection and fly back home long before the symptoms show up People can arrive here full of infecshytion without showing symptoms

Doggone those unintended conshysequences

I dont often look into my crystal ball (its mainly a paperweight) but if I were going to make a long-term bet Id bet that environmental exshytremism is about at the end of its run

Let a few hundred voters die from malaria and I suspect the politicians will suddenly look quite differently on the alleged value of swamps and a no-pesticide policy

Imagine a mini-epidemic of mashylaria or breakbone fever in a major tourist area

Given the number of internashytional visitors and illegal immigrants who do the menial jobs such an epidemic is not that far-fetched

I live in such an area and I can tell you that the murder of just one foreign tourist gives the chamber of commerce the hoteliers the atshytraction owners and even the govshyernor one giant-sized migraine

Imagine what a migraine if 300 or 400 tourists ended up in a hosshypital with a contagious tropical disshyease It would not as they say in flack world be good publicity

It would in fact be terrible pubshylicity because a prospective tourist might reason correctly that the odds of getting shot are slim but the odds of getting bitten by a mosquito during a mostly outdoor vacation are considerably higher They would stay away

continued on page 13

continued from page 8 sensitivity to disturbance and the afshyfinity of Culex erythrothoraxlarvae for vegetation make sampling by dipper very difficult and unreliable

[ Bloodfee~fng middot__ middot_ _ J

Culex erythrothorax is an opporshytunistic feeder which shows a disshytinct east-west cline in feeding prefshyerences In the eastern part of its range individuals collected near Salt Lake City were found to feed primarily on birds In southeastern California engorged individuals were found to feed equally on birds and mammals In much of central and southern California blooded females fed primarily (about 90 of identifiable blood meals) on mammals Rabbits cattle dogs and humans are among the most commonly utilized mammalian hosts

middot middot s~rvival- and middot _ Dispersat ~~ middot

Comparatively good survival of adult females and limited dispersal tendencies are two important facshytors causing large host-seeking populations to develop in the vicinshyity of bulrush marshes At well esshytablished wetlands in southern Calishyfornia it is not uncommon to colshylect between 10000 and 33000 females per C0

2-baited trap per

night during the summer Female survivorship is typically higher than for other co-occuring congeners Compared to other Culex species host-seeking Culex erythrothorax females typically disperse short disshytances Host seeking females are rarely collected more than 2 to 25 kilometers from developmental

sites However local wind condishytions and the availability of hosts may cause large numbers to disshyperse distances greater than 25 km (15 miles) from natal sites The anthropophily of this species could make Culex erythrothorax a distinct pest of humans residing near wetshylands

middot _ BiH Walton is an Assistant Professor with the Dep~_rtment of Entomology- University _ot

middot ~atifo~riia Riverside_cA-92521

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Fall 1997 11

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Position middot Announcement

MOSQUITO CONTROL MANAGER

HERNANDO COUNTY FL

Responsible for the planning supervision and direct execution of environmental programs operated by the County

REQUIREMENTS Graduation from a 4-year college or university with a degree in entomology or the basic sciences Five years experishyence in the operation of mosquito control or environmental programs Certification in the category of Pubshylic Health Pest Control in conformity with Public Law 92-515 regulating the application of restricted use pesticides in the State of Florida State Certification in the category of Right-of-Way Pest Control State Certification in the category of Aquatic Weed Control Must posshysess and maintain a valid Florida drivers license and be insurable by Countys current insurance carrier

Open until filled Pay Grade 21 0 Salary $321 09annually To receive an application or send a resume write to Hernando County Human Resourses 20 North Main Street Room 260 Brooksville FL 34601 or phone (352)754-4120 EOEAAMF0V and Drug-Free Workplace

12 Fa111997

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Meetings of Interest

FMCA Annual Fall Meeting November 16-20 1997

1997 Annual Fall Meeting of the Florida Mosquito Control Associashytion Radison Ponce de Leon Reshysort in St Augustine FL

For more information contact Shelly Redovan PO Box 60837 Fort Myers FL 33906-0837 Tel (941) 694-2174 Fax (941) 694-6959

Entomological Society of America Annual Meeting December 13-18 1997 Nashville TN

Contact (301) 731-4535 or e-mail meetentosocorg

Info is available on the web at httpwwwentosocorg

MVCAC Annual Conference January 25-28 1998

661h Annual Mosquito and Vecshytor Control Association of Califorshynia Conference Tenaya Lodge Fish Camp California

Contact Don Eliason at Tel (916) 685-2600 Fax (916) 685-1768 e-mail movcacaolcom

WCMVCA Annual Meeting February 19-201998

West Central Mosquito and Vecshytor Control Association meeting at the Grand Vista Hotel in Grand Junction CO

Contact Wayne Kramer at (402)471-0506 for more informashytion

AMCA Annual Meeting March 8-12 1998 John Ascuagas The Nuggett

(800)648-1177 in Sparks Nevada

Contact AMCA Central Office (318) 47 4-2723 for more informashytion

North American Conference on Pesticide Spray Drift Management March 29-April 1 1998 Holiday Inn by the Bay Portland Maine

For further information contact Jim Dill UMCE Pest Management Office 491 College Ave Orono ME 04473-1295 Tel (207) 581-3880 Fax (207) 581-3881

Visit their Web Site at httpwwwstatelleus

agriculturedrift1htm

continued from page 10 All Im suggesting is that we have

put up with extremists and village idiots long enough and wed better settle back into down-to-earth realshyistic work in the fields of public health public safety and governshyment in general Weve allowed the inmates to run the asylum long enough Now its time for a return to normal behavior normal actions and sensible science

Daffy ideas and ideology notshywithstanding if you play around with nature it will kill you -~

~charley Ree~e i$ ~ middot synCti middot -cated columnist with the _ Orla~dQ _Sentinel lie _can ~e reached __ by email at middot -

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- Editorsmiddot_Vote-Themiddot previ6middotus articent1~ - w$smiddot i ri ~~

eluded-to sHmul~te tllowght middotandmiddot hopefully elicit a -response from our readers middot- Wel i ltludn~i our -editorial procentessmiddot it was brought to my atten-middot tion -f~at a responsemiddot _to this-article had-alreadY be-E3ri submitted to __ the Orlando -sentineL - instead of pub Hshingmiddot this response lnih~ ~next i5sue of WingBeats 1-chose middotto ind~demiddot it akgtrig wi_th tflis articlemiddot -to _provfde another viewpoint wmiddotIJich -rnay h~lp to-correct a few oftlie inaccuracies

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Charlie Reeses August 14th colshyumn proclaims that the preservashytion of wetlands and the reduction of pesticide spraying near these areas will in the near futu re lead to many cases of malaria and other diseases He states that this is environmental extremism and not realistic

Unfortuntely his sensible scishyence lacks the support of actual facts For instance the 1 200 cases of malaria per year in the United States for the past six years are almost all imported cases conshytracted in other countries where conditions are more conducive to transmission Only a handful of malaria cases transmitted within the states have been recorded within the last 40 years Although the draining of swamps and spraying of pesticides did play a role in the reduction of malaria in Florida they were only a portion of the solution Window and door screenings coupled with the spread of air conshyditioning throughout Florida played a large role in keeping mosquitoes out of houses where pesticides couldnt reach

Furthermore the mosquitoes that transmit yellow fever and dengue do not breed in swamps but in small containers (such as flower pots and rain gutters) scattered thoughout every neighborhood Pesticides are often ineffectual against these urban mosquitoes So window screening again played a major role in reducing these two diseases in Florida

Although wetlands are the known breeding grounds for many mosquitoes manipulated wetlands such as rice fields in Texas orange groves cattle pastures and cane fields in Florida actually pose a much larger threat to people in

terms of producing large numbers of disease vectors The alleged value of swamps that Mr Reese mentions lies in the functions of rain and stormwater collection and disshypersal Without such wetlands rain must go somewhere and many low-lying agricultural areas such as rice fields and orange groves turn into mosquito breeding grounds

Draining swamps and spraying pesticides are not a magic bullet for mosquito and disease control Reliance on these methods alone has taught mosquito control and health officials harsh lessons Mosshyquitoes and the diseases they spread have complicated life cycles which can intertwine with our own socioeconomic cycles

Mr Reese should contact the village idiots and extremist who work daily in mosqito control to learn the facts The difficult task of controlling mosquitoes in Florida is an ongoing challenge We have learned from others that have failed to utilize multiple control methods and relied too heavily upon one method

Pesticide resistance of malarial mosquitoes presents a real danger to public health For example the over-use of DDT for malaria conshytrol as well as crop protection in Sri Lanka failed to prevent the disease and resulted in over 400000 cases of malaria in 1975 Cotton farmers in El Salvador and Guatemala have been drenching their fields with every known insecticide These actions have produced malaria mosquitoes resistant to all chemishycals Mr Reese is right on one count If you fool around with nashyture it can kill you

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Fal11997 13

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Most modern mosquito control operations include larviciding as an integral part of their pest manageshyment practices Mosquito larvicides are available in a wide range of types and formulations Dry formushylations include briquets granules and pellets

Formulations usually are applied directly out of the container genershyally with no need for mixing Some sand formulations may be made on site by following instructions proshyvided on the labels There is usushyally a range of rates for each forshymulation to cover different habitats and water quality depth movement and organic content plus other facshytors discussed on product labels

Selecting the formulation and application rate that gives you the best coverage for your larval habishytats requires some thought Dryshyformulated larvicides may be apshyplied by hand with ground equipshyment and by air In this article we focus on ground applications and calibration as we have in the previshyous two articles in this series

Calibration is an encompassing principal that includes

1 determining what insecticide formulation to use

2 the rate of toxicant per acre to apply

3 the total spray volume needed to use to get good coverage

4 determining (or setting) the flow through the nozzle

5 determining the effective swath width and if appropriate the walking pace of application

14 Fall1997

After these parameters are set the applicators should practice by spraying a measured area against the clock Through practice the applicator will develop visual cues and hand-eye coordination which leads to standardizing hisher covshyerage per minute These factors apply to granular blowers horn seeders and other dry formula apshyplication tools including aerial spreaders

Choosing The Formulation

The three active ingredients most commonly used in dry larvishycide formulations are temephos sshymethoprene and delta-endotoxin (Bti) All three may be mixed with plaster (eg Altosid Briquetsreg Altosid XR Briquetsreg Altosid Pelshyletsreg and 5 Skeeter Abatereg) with food substances (Bactimos Pelshyletsreg) or with cork (Bactimos Brishyquetsreg) They also may be attached to ground-up corncob (eg Vectobac Greg and Vectobac CGreg) paper pulp waste material (eg Abadac which is liquid Abate plus Biodacreg Aitodac which is Altosid Liquid Larvicidereg plus Biodac) or sand (eg 1 Skeeter Abatereg LarvXSGreg and Aitosand which is Altosid Liquid Larvicide plus sand) Briquets generally are designed for use at rates ranging from 1 per 200 square feet (218 per acre) to 1 per 25 square feet (1742 per acre) A typical application rate is 1 per 1 00 square feet (436 per acre) in many situations Some granular products may be applied at up to 20 lbs per

acre but applicators typically used 5-10 lbs per acre

Briquets and pellets slowly reshylease toxicants to provide sustained control for one or more months The Bti toxicants are stomach poisons which must be placed in that part of the water column where the tarshyget larvae feed S-methoprene and temephos are contact poisons which mix with the entire water column Bactimos Briquets which float are primarily a mixture of Bti and cork and are often staked in place to prevent their being moved by wind waves and animals Altosid Briquets Altosid XR Brishyquets Altosid Pellets and Skeeter Abate Pelletsreg are made with plasshyter and sink to the bottom Some mosquito control agencies place briquets in fine wire mesh baskets and suspend them in storm drains just above the bottom so they are not swept away or buried Sand formulations also sink but a new Bti formulation LarvXsg is coated with vermiculite which reshyleases and carries the Bti back to the surface from which it is reshyleased Some Bti corncob granshyules in each bag will float while othshyers may sink This is also true for formulations using Biodac as a carshyrier

Briquets are most commonly dispensed by hand but Clarke Equipment Companys Arrow Gunreg is sometimes used to broadcast Altosid Briquets but not Bactimos Briquets The Arrow Gun uses compressed air captured from a non-thermal ULV aerosol generashytor to propel briquets down its barshyrel It may be used for lobbing one

or a few briquets into isolated small pools where placement is not a critishycal issue both in terms of cost and eHiciency Applicators may also use a slingshot The Arrow Gun works very well for applying pellet ground corn cob and other granushylar carrier formulations in large amounts In order for the equipment to be used properly as with any application equipment it must first be calibrated

Figure 1 shows release rates for Altosid Briquets Altosid XR Brishyquets and Altosid Pellets These curves are adapted from an article by Dr Doug Ross et a called Methoprene concentrations in freshwater microcosms treated with sustained-release Altosid formulashytions (Mosquito News 1994 Vol 1 0(2 pt 1 pp 202-21 0 They are indirect measures of release rates derived by measuring the concenshytration of active ingredients in the water Notice that the AI is not reshyleased uniformly throughout the active life of the formulations Conshysider this when you are larviciding We suspect that most solid larvishycides have characteristic release rate curves but we are not aware of any published descriptions If we could tap into the EPAs confidenshytial data files we might be able to find out more about this topic

In a large rectangular area usshying a 1 briquet1 00 sq ft applicashytion rate if briquets are placed in the recommended 1 0 foot intervals in even rows the maximum (diagoshynal) distance between two adjacent briquets is a little over 14 feet Imagshyine a square with a briquet in each corner and mosquito larvae in the center a little over 7 ft from each briquet To decrease the maximum diagonal distance between briquets to 1 0 feet while still placing briquets every 10 feet in rows stagger the rows so the briquets in the second row are between the briquets in the first row Materials science tells us this is the most efficient spacing scheme We recommend practic-

ing briquet placement in a mowed yard prior to actual field work This will allow you to get your spacing right Monroe County (Florida) Mosquito Control District field pershysonnel typically hand-apply over 20000 Altosid Briquets every year by walking their breeding sites with a 2 gallon pail full of product

STAGGERED X X X

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ABREAST

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Another problematic situation occurs when treating a narrow ditch If a ditch averages 8 feet wide you would apply a briquet every 125 linear feet to get the 1 briquet per 1 00 sq feet If the ditch averaged 2 feet wide you would apply one briquet for every 50 linshyear feet In the case of a narrow ditch and in the absence of any external mixing forces such as wind or water flow the concentrashytion will be higher than expected adjacent to the briquet because the toxicants cannot disperse equal distances in all directions In addition the concentration of AI at the center point between adjacent briquets may be below the lethal dose Exposure of mosquito larvae to sublethal doses may result in resistance to the AI If the water is flowing the problem is solved but you may get accelerated briquet erosion Altosid Briquet labels provide instructions for treatshyments in moving water

East Volusia Mosquito Control District (Florida) developed a method to apply a whole seasons worth of Altosid (30-day) Briquets

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DAYS AFTER APPLICATION

Figure 1

Release rates for Altosid Briquets altosid XR Briquits and Altosid Pellets

Fall1997 15

at one time They cap a 6-8 inch section of 1-inch ID PVC pipe atshytach this (cap-side up) to an alumishynum stake (packing tape works great) and drill a 38 inch hole through it at the other end Brishyquets are inserted into the cylinder sometimes with color coded poker chips as spacers and a wire is run through the hole (or the stake is bent inward) to prevent the briquets from falling out prematurely The stake is driven into the bottom at the breeding site As the breeding site is flooded the bottom briquet erodes away releasing AI Trapped air prevents water from reaching the other briquets Another briquet falls down to take its place when it is about gone A field inspector can count poker chips to see how many Altosid Briquets have been used up

When bottom contours are highly irregular and the water depth is shallow and decreasing you may

not want to use briquet formulations at all Consider whether or not the briquet will ever be isolated from any part of the intended treatment area during its active life If so larshyvae may escape control efforts The amount of carrier material used can dictate the quality of control you achieve and is a very important consideration Unless we formulate our own pesticides we must work with a fixed amount of toxicant per pound as determined b~middot the manushyfacturer for an average situation Wouldnt it be nice to have a series of dry formulations based on the same AI that best fit different situashytions

Consider Figure 2 for a moment It shows the approximate average number of particles per square yard for four different carriers This graph is the result of investigations by students attending the weekshylong Florida Mosquito Control Asshysociation Dodd Short Courses on

Larviciding during 1996 and 1997 plus the work of Pasco CMCDs John Schaediger who washed and counted thousands of grains of sand Notice that 6 pounds of Biodac1200 contain about the same number of particles as 1 0 lbs of 1 014 grit corn cob If you have determined that 1 0 lbs of Vectobac CG (which uses 1 014 grit corn cob) is the correct application rate for you then perhaps 6 pounds of Biodac 1200 formulated with the same amount of Bti will do the same job and save you 40 in weight At these rates they both contain approximately the same number of carrier particles per pound The weight difference could increase the economics of aerial application where the lower weight translates into more acres per payshyload per flight

We apply 75 lbs of granulated 1 014 grit corncob per acre as our base rate This includes both in-

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house mixes of blank granules with active ingredients and commercially finished products The 75 lbs is not just a figure that has been pulled out of the sky but one that many trials and observations have shown to be necessary to get good coverage with a variety of bottom contours and vegetation types You may need a different base rate When field personnel are conshyfronted with heavy detritus or vegshyetation aggregated larvae or a preponderance of late in star larvae they can then increase their applishycation by slowing down their pace or narrowing the swath to raise the dosage of pesticide (remembering to stay within the maximum labeled rate)

Whatever the formulation the proper application is critical to the efficiency and effectiveness of your program Larvicide labels comshymonly include only very general guidelines for application techshyniques or equipment selection This latitude allows applicators and technical staffs to choose a system that works best for their circumshystances A granular label notes the material should be applied unishyformly in conventional aerial and ground equipment

Equipment Calibration

Equipment calibrations are imshyportant for the effectiveness of your operation Consistency is born out of practice on top of more practice Failures of larvicides are often atshytributed to missed areas caused by poor applications Calibrating flows on dry application equipment is done either by timing how long it takes for a known amount to pass through the unit or by collecting all the material blown from the nozzle for a fixed period of time and then weighing it Either should be done by two people one that handles the machine and one that does the timshying The collection method retains

the material for subsequent tests but may restrict the flow on certain machines Machines with powershyful air blasts can only be checked by timing the discharge of a known quantity

Knowledge of the flow rate and of factors affecting it are critical to calibration The most common powshyered ground equipment used for dry applications is the gasolineshyengined backpack mistblower duster The units are capable of providing even coverage good throw and are simple to use They typically broadcast granules in a 40-60 ft swath width with the operator walking at 1-3 miles per hour This translates to 5-20 acres per hour of spray time Several things can be done to change the flow rate with the nozzle orifice or disc as the primary determinate Changing the pressure will also change the flow but to a much lesser degree and it has other side effects Some power dusters have movable grates that regulate flow over the normal opshyerating range Some brands have a series of replaceable orifice discs that allow discharge rate changes in small steps Blower speed also affects the throw but that should have marginal effect on the disshycharge rate

Other ground equipment that may be used include crank slinger seeders horn seeders and modishyfied ULV equipment (eg Arrow Guns mentioned above) The flow of spinning disc spreaders or othshyers with a mechanical agitator may be somewhat affected by the opshyerational speed Horn seeders which have about a 20 ft swath width when applying Bti granules are often used by our field personshynel to treat small sites They have replaced the Dipper and Bucket method where an applicator fills a dipper from a bucket of granules and then carefully and evenly broadcasts them

An Example

Assume you have determined that you can comfortably apply B ti corncob granules in 50ft swaths at 2 mph (121 acreshour) using a duster and you want to apply them at 25 to 10 lbsacre To get proper coverage in typical vegetation you will use 5 lbsacre and when conshyfronted with adverse conditions you may double or in this case with a maximum label rate of 20 lbs acre quadruple the application to get the proper dosage of pesticide to the insect

Fill the hopper with granules making sure not to get any pieces of paper or other debris mixed into the product If the unit is equipped with an air agitation system make sure that it is operational Start the engine and make sure that the granules are free flowing through the nozzle If the unit is equipped with an adjustable gate style regushylator center it for an initial trial Close the flow control For collectshying granules you need a nylon stocking and a scale that measures to ounces or grams Place the stocking over the discharge tube and secure it with a rubber band The stocking should be supported so it wont pinch the air flow off Run the blower up to speed and then open the flow valve as you start timing Have the operator open the valve as the stop watch is started

Because of the very low flows (small quantities) of granules needed take a sample over a given period in the 3-5 minute range Shut the flow off as the timer notes the end of the period Pull the colshylection into the bottom of the stockshying and remove it from the nozzle Place another stocking on the duster and collect a second sample and then a third sample Collect at least three samples weigh each and average the results Be sure to subtract the weight of the stock-

Fall1997 17

ing before calculating the average If one sample volume is much higher or lower than the other two samples then replace the odd sample with a new one Assume you collected three 5-minute samples that weigh 61 64 and 59 oz each The average is 61 3 oz5 min or 1227 ozmin

Practice

Swath tests are best done inishytially using a paved surface such as a parking lot for a practice spray plot because the granules are easshyily seen Blank granules for pracshytice and for your own formulating may be purchased from The Andersons (800-537-3370) and other sources Get 1014 grit if you use Vectobac CG or an equivalent and 58 grit if you use Vectobac G or an equivalent Fill the hopper with a weighed quantity of granules and walk over the plot trying to cover the entire area with an even dosage To determine how much was applied empty the hopper and weigh the material remaining Afshyter a good distribution has been

mast~red move onto a measured field where the terrain is more diffishycult and continue practicing Proshygressively move into more difficult areas as your skill level increases You can get to the point where you know what 5 lbsacre looks like in any habitat and then when you apshyply the real stuff you will know you have done so properly

Assume your practice spray plot is 18 of an acre Therefore to get the proper dose you want to apply 18 of 5 lbs (0625 lbs or 10 oz) to the plot You earlier calculated that your duster is putting out approxishymately 1225 oz per min The calshyculated time to put out the 1 0 oz required to treat the test plot is 082 minutes or49 seconds [determined by dividing 10 ounces by 1225] You also determined that you can treat 121 acreshour at a 2 mph walking speed At that speed you can treat about 16 of an acre in 49 seconds You have three choices to adequately cover your 18 acre practice plot 1) You can walk at your normal speed and apply at a rate slightly higher than 5 lbsacre 2) you can walk a little slower and

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If you have any questions feel free to contact the authors at Pasco County Mosquito Control District 2308 Marathon Road Odessa Fl 33556 Phone 813-376-4568 Fax 813-376-470 Email pcmcdgtenet

~

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In order to control or eradicate vector-borne disease the world Health Organization launched a substantial program of research on the screening evaluation and deshyvelopment of pesticides for the conshytrol of disease vectors and human pests in the early 1960s This proshygram of research and development continued into the 1970s Various collaboration centers and WHO regional research laboratories were involved in this multiphasic evaluashytion and research program This program was later designated as WHO-PES (WHO Pesticides Evaluation Scheme) which inshycluded laboratory screening of new pesticides and their formulations and finally small-scale and largeshyscale village field trials where effishycacy safety and feasibility of applishycation were studied Additionally whenever possible impact on the level of endemic diseases was also assessed The 41

h phase of this scheme addressed specification of pesticides and their formulations to be used in vector control

The WHO-PES program evenshytually came to a halt in the eighties and with restructuring of the vector Biology and Control Division in WHO this program came to a grinding halt It soon became apshyparent that member countries carshyrying on substantial vector control programs especially mosquito conshytrol operations soon reached the stage when appropriate tools and strategies for use in operational programs became quite scarce Member countries put forward deshymands for the development of more effective and safer chemical and

20 Fa111997

biological control measures To reshyspond to this global demand the Division of Control of Tropical Disshyeases (CTD) at WHO reinvigorated the WHO-PES Program by holding an informal consultation on the Evaluation and Testing of Insectishycides on October 1996 where I was asked to serve as the Chairperson of the consultation Copies of the report of this Consultation can be obtained from Dr Zaim Morteza whose address appears at the end of this article

As a result of the Informal Conshysultation and other discussions held at WHO regarding the future need for public health pesticides CTD recently (1996) launched the GCDPP program This is indeed a crucial program which requires colshylaboration among national and inshyternational agencies research inshystitutions industry and regulatory agencies The main objectives elshyements and scope of this program are briefly discussed below

The main objectives of the GCDPP program are

bull To facilitate the search for alternative pesticides including mishycrobial pesticides as well as applishycation methodologies

bull To advise on the relative priority of activities within the manshydate of GCDPP

bull To advise on issues related to the development and use of pesshyticides and application equipment within the context of WHOs global disease control strategies

bull To promote harmonization of activities related to pesticide deshyvelopment and safe use

bull To promote and encourage the highest quality of work through appropriate resource mobilization

bull GCDPP will serve as an advisory group to CTDWHOPES in matters of pesticide developshyment safe and proper use and apshyplication equipment

Membership and Meetings

A number of agencies organishyzations and manufacturers of pesshyticides and application equipment will become members of GCDPP as well as foundations and WHO Collaborating Centers Other groups and -organizations involved in manufacturing pest manageshyment and crop protection will also be invited Attempts will be made to maximize representation but at the same time ensure appropriate balance In addition to the above distinguished scientists and direcshytors of WHO Regional Offices may also be invited to attend the meetshyings of GCDPP

GCDPP will provide a forum for the exchange of technical informashytion and oversee the WHO-PES biennial plan and collaboration with other organizations and institutions GCDPP will meet every other year in Geneva Switzerland Informal consultation meetings on specific topics will be convened as the need arises CTD will be responsible for the organization of such meetings

continued on page 25

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How many of you know the names Norma Jean Baker Cornelius Magillicutty dichloroshydiphenyl-trichloro-ethane Haliaeetus leucocephalus and its distant relative Taxodium distichum How about Aedes albopictus Well if you are willing to bet $100 you know all six withshyout looking at the answers then you are either very bright very old well read or have too much time on your hands If you know only one I hope its the Asian tiger mosquito What if for the remaining five I gave you the hints of Some Like it Hot baseball legend insecticide whiteshyheaded bird and tree with knees The older ones amongst us and thats getting to be a higher percentshyage each year should recognize Marilyn Monroe and Connie Mack for the first two All of you should be ashamed of yourself if you dont recognized DDT The last two reshylated by name only are Bald Eagle and Bald Cypress If you got both of those you are probably psychic and also know what the point of this article is

And what is the point of this arshyticle the need for common names for mosquitoes Most of us know the birds plants and mammals by their common names Why then must we for the most part use scishyentific names for mosquitoes There are other names that would be more meaningful easier to spell and certainly easier to pronounce Ill bet my $100 right now that 50 of us couldnt spell Toxorhynchites or taeniorhynchus in a spelling bee Thank goodness Aedes abopictus had a catchy common name when

- bull bull -middot ~ bull middot- ~ bull ~ bull

it became established in the US in 1985 Never mind that the common name conjured up all sorts of wrong impressions Asian tiger mosquito was a lot easier for the public and press and I dare say most mosshyquito control practitioners to undershystand and remember Also our friends at the Entomological Socishyety had the accepted common name as Forest Day mosquito but to their credit they changed it to what every one calls it the Asian tiger mosquito

So despite their scientific bent scientists can be influenced to change their minds If common names and abbreviations too didnt have a purpose that is to help us to communicate then we would all be saying too many long boring and confusing sentences Consider the following For years Cornelius Magillicutty sprayed his back yard with dichloro-diphenylshytrichloro-ethane for Aedes abopictus and then years later with Norma Jean Baker at his side watched the thin-shelled eggs of Haliaeetus leucocephalus drop out of 500-year old Taxodium distichum that he loved so much Yawn

Its that kind of phraseology that keeps people including some scishyentists from reading the scientific literature When trying to commushynicate any word or phrase that your listener doesnt know or understand tends to confuse them annoy them or make them feel inferior and that often makes them stop listening Communicating with the public has become a major mosquito control activity in recent years When com-

municating with the public scientific terms and jargon are neither desirshyable or necessary Mosquito control activities can be explained in very simple terms We could use the term Bacillus thuringiensis var israeensis instead of BTl but how many of us do Telling the average person SLE is an arbovirus doesnt give them any more information than telling them its a virus

And whats with this italics stuff for scientific names Ask people (inshycluding you perhaps) why we italishycize scientific names and most will probably guess that its to emphashysis the term Wrong If you care why look it up Lets forget it from now on OK If you cant write Culex quinquefasciatus without italics then consider my alternative-comshymon names that dont need to be italicized

The Entomological Society of America has a committee that conshysiders and usually rejects proshyposed official common names for insects There are only 14 mosshyquitoes on that list and I dare say most of us dont use most of them The problem with this list is that it was developed by scientists and everyone knows that all scientists are mad not just those in the movshyies Scientists want to do things in a scientific manner-logical meshythodical and precise Just because the entomological journals will only let you use accepted common names in their pages doesnt mean we cant use other common names in presentations and io print and we should

Fall1997 23

What we need is a list of comshymon names that the average mosshyquito control practitioner uses No one that anyone takes seriously will say they found some Culex pipiens quinquefasciatus (note no italics) in a polluted pond Most will say quinks Sure we can capitalize Quinks if it makes you feel better it does me So why are we afraid to write Quinks in our reports or say Quinks in formal talks Most people probably dont say quinks (see I dont insist on capitalization) because they think it makes them sound unprofessional Quinks is a distinctive short easy to rememshyber and fun to say name it has a beat that you can dance to and I give it a 99 Does anyone you know call quinks the southern house mosquito the accepted common name How about northern house mosquito for pipiens

Taenies or taenys or whatshyever spelling you want to use is easily recognized by east and south coast mosquito people as the comshymon name for Aedes taeniorhynchus one of the saltmarsh mosquitoes Again its a distinctive short easy to rememshyber and fun name It also describes the size of the species somewhat small or teeny-a bonus And who doesnt use Tox as the common name for our other spelling bee example

We dont hesitate to use comshymon names for a group of mosquishytoes that breed in a particular habishytat In addition to saltmarsh mosshyquitoes we refer to floodwater mosquitoes (which incidently also describes many saltmarsh mosquishytoes) tree hole mosquitoes dirty water mosquitoes grey water mosshyquitoes freshwater mosquitoes container-breeding mosquitoes pasture mosquitoes rock hole mosshyquitoes crab hole mosquitoes and on and on These habitat names are not mutually exclusive For exshyample pasture mosquitoes are also floodwater mosquitoes and fresh-

24 Fall1997

water mosquitoes By the way the translation of floodwater mosquito according to the Entomological Soshyciety is Aedes sticticus What Habitat names are also convenient for discussions among people from different geographic areas For example nature tends to give the same qualities to mosquitoes that breed in tree holes regardless of whether they are tree holes in Calishyfornia Virginia Queensland or Borneo From an operational mosshyquito control standpoint knowing the habitat of the mosquito can be more informative than knowing its scientific name

So lets consider some common names of species that we might use One common pest and potenshytial vector species that needs a common name is Coquillettidia perturbans (I think Ive weaned myself from italics) the aggressive biter whose larvae attach to the roots of aquatic plants particularly cattails (I could have said Typha species) Cattail mosquito is a natural even though larvae may attach to a variety of plants Another name could be the salt and pepshyper mosquito or another name taken from its scientific name could be the perturbing mosquito

How about the Anopheles The accepted common name for Anopheles quadrimaculatus is the common malaria mosquito This may have been accurate when malaria was a problem in this counshytry but now neither malaria nor this mosquito is common in this counshytry Im sure most of our hypothetishycal naming committee made up of operational mosquito controllers would call them quads

We have already dealt with Quinks Another obvious common name for another Culex Cx salinarius is sally or sallys or sallies Culex restuans is a little more tricky but how about rusty Rusty is suggestive of the color of the mosquito and it is similar to

resty a name that just doesnt sound right to me

Aedes vexans a common floodshywater mosquito in much of the US needs a common name The acshycepted common name vexans mosquito would be OK if most people know what vexing means And if they do why not call it the vexing mosquito Calling Aedes aegypti in the US by its accepted name the yellowfever mosquito is misleading Yellow fever has been absent from the US since right after the turn of the century Aegypti or gyps is often used by field and lab workers so why not adopt those terms

I could go on and on but Im more interested in what you think If you will send me your common names (keep it clean please) for any species you are familiar with Ill be happy to compile them and report back in a future article in Wing Beats (Theres that italics again different reason) If they appear in Wing Beats maybe just maybe we can call them official common names You can fax me at 561-778-7204 or E-mail me at cdmognvifas ufledu By the way you can address the message to Charlie Chas or Char The only person I insist call me doctor is my ex-wife and I would rather she didnt call me at all

-C_h~ulie M~rtis middot is an Assoshy _ciate middotPi~fesso( at the Unishy versity ~f floridas Medical Eiitomology Laboratory middot hi middot middot

Verq Beach Fiorida~

continued from page 20

providing support for report prepashyration and other documents and perform secretarial functions

Funding

In order to advance the objecshytives of GCDPP a stable source of funding will be necessary WHO CTD (WHO-Division of Control of Tropical Diseases) will establish and administer a trust fund which will be designated as GCDPP-Trust Fund which will be administered according to the WHO financial rules regulations and practices

The trust fund will be used to convene meetings production and dissemination of documents exshychange and dissemination of inforshymation on the need for public health pesticides and equipment and for activities which will promote the development and use of alternative safe compounds or application equipment

1James of organizations institushytions foundations manufacturers and individuals participating and contributing to this program will be listed Each participant will be enshycouraged to make annual contribushytions to the trust fund

Further Information

For further information on WHOshyPES or GCDPP contact Dr Zaim Morteza WHO-PES CTD World Health Organ ization 1211 Geneva 27 Switzerland E-mail zaimmwhoch

Nlir smiddotMulla is a Profes-sor with the Deparfrilent of ~nt-oshy_mologyUniverslty at califor middot -nia Riversidemiddot CA92521 middot _ middot middot

-

middotMulla= Receives -middot

Recognition Awar(j _

Mir S Mulla Professor of Entoshymology Department of Entomolshyogy University of California Rivershyside CA was presented the Scishyence Society of Thailand~ Meritoshyrious Recognition Award by the Thailand Minister of Science and Technology last October

Mulla an authority on insects of medical and public health imporshytance was cited for his efforts and leadership in organizing the First International Symposium on Biopesticides convened at Naresuan University in Thailand This symposium attended by some 300 participants from 20 countries covered biodiversity safety toxicshyity efficacy and proper use of biopesticides based on natural products and pathogenic organshyisms The proceedings of this first symposium amounting to 300 pages will be published soon

Mulla informs us that the 2nd International Symposium on Biopesticides will be held in late October 1998 on Langkawi Island off the coast of Malaysia Anyone interested in receiving further inforshymation regarding the proceedings or the second symposium should contact Dr Mulla at tel (909) 787-5818 fax (909) 787-4210 and eshymail mulla mailucredu

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Notice Psotophora middotgtcyaneseens collect~d middotin Aiachua County FL

- ~

and 9 pupae of this species were collected by the author from a sunshylit small (ca 2 m diam and 20 em deep) grass-lined pool filled with rainwater at Gainesville Florida

a common identification number with their 41h instar larval and pupal exuviae On subsequent visits to the site no additional Ps cyanescens were collected

Psorophora cyanescens (Coquillett) previously has been reported in Florida from the followshying counties Bay Duval Escambia Gadsden Hillsborough Jackson Leon Okaloosa Suwannee and Union (HT Evans Florida Mosquito Control Handbook 1994) On 26 May 1997 one 4h instar larva

Also collected from the pool were numerous larvae and pupae of Psorophora columbiae (Dyar and Knab) Aedes vexans (Meigen) and Culex salinarius Coquillett and 17 4h instar larvae of Psorophora ciliata (Fabricus) All immatures were individually reared and the resulting adults were linked by

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In order to update the Directory we would appreciate your completing this form Please type or print and return it to the address listed below We would also appreciate your copying this form and supplyshying it to any colleagues who are working in this field Your cooperation will allow greater communication and efficiency within our profession

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Please return by Air Mail to Dr Eugene Gerberg Chairman AMCA International Affairs Committee 5819 NW 57th Way Gainesville FL 32653-3257 USA

Fall1997

Date completed

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Page 8: Wing Beats Volume 8 Number 3wingbeats.floridamosquito.org/Wingbeats/pdfs/Vol8No3.pdf · 2014. 4. 11. · Stan Cope, Norfolk, VA Betsy Field, Vero Beach, FL John Gamble, New Smyrna

I

_ l ewpoint

I

Were back say P vivax and P faciparum two of the little felshylows in the microbe world that cause malaria

More exotic diseases catch the attention of the media and Hollyshywood - Ebola for example which killed about 250 people in six months in the last outbreak in Afshyrica

Heck we kill 5000 Africans a day our little microbe friends say And were coming back to the United States where we once were very common as recently as the 1930s In fact we never left We just dont get our fair share of the media spotlight Liberal press you know

Globally malaria which is spread by a mosquito kills more than 27 million people a year and sickens about a half-billion

People cau go somewhere pick up au iufectiou aud fly back home loug before the symptoms show up

These and other interesting facts are from a well-written piece in the August issue of Atlantic Monthly by Ellen Ruppel Shell You should read it

10 Fall1997

IVly own trusty Statistical Abshystract of the United States shows that there have been an average of 1 200 cases of malaria per year in the United States for the last six years

Malaria can cause brain damage and is fatal in 10 percent to 50 pershycent of the cases What intrigues me is that we are as happens when societies become irrational workshying at cross-purposes

Environmentalists want to preshyserve swamps and create more They now call them wetlands and they are sacred They are also the places where mosquitoes breed not only those which are carriers of malaria but also those which carry yellow fever (you really dont want old yellow jack to come back) denshygue or breakbone fevermiddot and enshycephalitis

Environmentalists also don t want to spray pesticides But it was the draining of swamps and the spraying of pesticides that ended the terrible toll malaria once exshyacted from Americans

Maybe it would not matter exshycept for global trade immigration illegal immigration tourism and all of the above aggravated by jet travel

People can go somewhere pick up an infection and fly back home long before the symptoms show up People can arrive here full of infecshytion without showing symptoms

Doggone those unintended conshysequences

I dont often look into my crystal ball (its mainly a paperweight) but if I were going to make a long-term bet Id bet that environmental exshytremism is about at the end of its run

Let a few hundred voters die from malaria and I suspect the politicians will suddenly look quite differently on the alleged value of swamps and a no-pesticide policy

Imagine a mini-epidemic of mashylaria or breakbone fever in a major tourist area

Given the number of internashytional visitors and illegal immigrants who do the menial jobs such an epidemic is not that far-fetched

I live in such an area and I can tell you that the murder of just one foreign tourist gives the chamber of commerce the hoteliers the atshytraction owners and even the govshyernor one giant-sized migraine

Imagine what a migraine if 300 or 400 tourists ended up in a hosshypital with a contagious tropical disshyease It would not as they say in flack world be good publicity

It would in fact be terrible pubshylicity because a prospective tourist might reason correctly that the odds of getting shot are slim but the odds of getting bitten by a mosquito during a mostly outdoor vacation are considerably higher They would stay away

continued on page 13

continued from page 8 sensitivity to disturbance and the afshyfinity of Culex erythrothoraxlarvae for vegetation make sampling by dipper very difficult and unreliable

[ Bloodfee~fng middot__ middot_ _ J

Culex erythrothorax is an opporshytunistic feeder which shows a disshytinct east-west cline in feeding prefshyerences In the eastern part of its range individuals collected near Salt Lake City were found to feed primarily on birds In southeastern California engorged individuals were found to feed equally on birds and mammals In much of central and southern California blooded females fed primarily (about 90 of identifiable blood meals) on mammals Rabbits cattle dogs and humans are among the most commonly utilized mammalian hosts

middot middot s~rvival- and middot _ Dispersat ~~ middot

Comparatively good survival of adult females and limited dispersal tendencies are two important facshytors causing large host-seeking populations to develop in the vicinshyity of bulrush marshes At well esshytablished wetlands in southern Calishyfornia it is not uncommon to colshylect between 10000 and 33000 females per C0

2-baited trap per

night during the summer Female survivorship is typically higher than for other co-occuring congeners Compared to other Culex species host-seeking Culex erythrothorax females typically disperse short disshytances Host seeking females are rarely collected more than 2 to 25 kilometers from developmental

sites However local wind condishytions and the availability of hosts may cause large numbers to disshyperse distances greater than 25 km (15 miles) from natal sites The anthropophily of this species could make Culex erythrothorax a distinct pest of humans residing near wetshylands

middot _ BiH Walton is an Assistant Professor with the Dep~_rtment of Entomology- University _ot

middot ~atifo~riia Riverside_cA-92521

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Fall 1997 11

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Position middot Announcement

MOSQUITO CONTROL MANAGER

HERNANDO COUNTY FL

Responsible for the planning supervision and direct execution of environmental programs operated by the County

REQUIREMENTS Graduation from a 4-year college or university with a degree in entomology or the basic sciences Five years experishyence in the operation of mosquito control or environmental programs Certification in the category of Pubshylic Health Pest Control in conformity with Public Law 92-515 regulating the application of restricted use pesticides in the State of Florida State Certification in the category of Right-of-Way Pest Control State Certification in the category of Aquatic Weed Control Must posshysess and maintain a valid Florida drivers license and be insurable by Countys current insurance carrier

Open until filled Pay Grade 21 0 Salary $321 09annually To receive an application or send a resume write to Hernando County Human Resourses 20 North Main Street Room 260 Brooksville FL 34601 or phone (352)754-4120 EOEAAMF0V and Drug-Free Workplace

12 Fa111997

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Meetings of Interest

FMCA Annual Fall Meeting November 16-20 1997

1997 Annual Fall Meeting of the Florida Mosquito Control Associashytion Radison Ponce de Leon Reshysort in St Augustine FL

For more information contact Shelly Redovan PO Box 60837 Fort Myers FL 33906-0837 Tel (941) 694-2174 Fax (941) 694-6959

Entomological Society of America Annual Meeting December 13-18 1997 Nashville TN

Contact (301) 731-4535 or e-mail meetentosocorg

Info is available on the web at httpwwwentosocorg

MVCAC Annual Conference January 25-28 1998

661h Annual Mosquito and Vecshytor Control Association of Califorshynia Conference Tenaya Lodge Fish Camp California

Contact Don Eliason at Tel (916) 685-2600 Fax (916) 685-1768 e-mail movcacaolcom

WCMVCA Annual Meeting February 19-201998

West Central Mosquito and Vecshytor Control Association meeting at the Grand Vista Hotel in Grand Junction CO

Contact Wayne Kramer at (402)471-0506 for more informashytion

AMCA Annual Meeting March 8-12 1998 John Ascuagas The Nuggett

(800)648-1177 in Sparks Nevada

Contact AMCA Central Office (318) 47 4-2723 for more informashytion

North American Conference on Pesticide Spray Drift Management March 29-April 1 1998 Holiday Inn by the Bay Portland Maine

For further information contact Jim Dill UMCE Pest Management Office 491 College Ave Orono ME 04473-1295 Tel (207) 581-3880 Fax (207) 581-3881

Visit their Web Site at httpwwwstatelleus

agriculturedrift1htm

continued from page 10 All Im suggesting is that we have

put up with extremists and village idiots long enough and wed better settle back into down-to-earth realshyistic work in the fields of public health public safety and governshyment in general Weve allowed the inmates to run the asylum long enough Now its time for a return to normal behavior normal actions and sensible science

Daffy ideas and ideology notshywithstanding if you play around with nature it will kill you -~

~charley Ree~e i$ ~ middot synCti middot -cated columnist with the _ Orla~dQ _Sentinel lie _can ~e reached __ by email at middot -

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Charlie Reeses August 14th colshyumn proclaims that the preservashytion of wetlands and the reduction of pesticide spraying near these areas will in the near futu re lead to many cases of malaria and other diseases He states that this is environmental extremism and not realistic

Unfortuntely his sensible scishyence lacks the support of actual facts For instance the 1 200 cases of malaria per year in the United States for the past six years are almost all imported cases conshytracted in other countries where conditions are more conducive to transmission Only a handful of malaria cases transmitted within the states have been recorded within the last 40 years Although the draining of swamps and spraying of pesticides did play a role in the reduction of malaria in Florida they were only a portion of the solution Window and door screenings coupled with the spread of air conshyditioning throughout Florida played a large role in keeping mosquitoes out of houses where pesticides couldnt reach

Furthermore the mosquitoes that transmit yellow fever and dengue do not breed in swamps but in small containers (such as flower pots and rain gutters) scattered thoughout every neighborhood Pesticides are often ineffectual against these urban mosquitoes So window screening again played a major role in reducing these two diseases in Florida

Although wetlands are the known breeding grounds for many mosquitoes manipulated wetlands such as rice fields in Texas orange groves cattle pastures and cane fields in Florida actually pose a much larger threat to people in

terms of producing large numbers of disease vectors The alleged value of swamps that Mr Reese mentions lies in the functions of rain and stormwater collection and disshypersal Without such wetlands rain must go somewhere and many low-lying agricultural areas such as rice fields and orange groves turn into mosquito breeding grounds

Draining swamps and spraying pesticides are not a magic bullet for mosquito and disease control Reliance on these methods alone has taught mosquito control and health officials harsh lessons Mosshyquitoes and the diseases they spread have complicated life cycles which can intertwine with our own socioeconomic cycles

Mr Reese should contact the village idiots and extremist who work daily in mosqito control to learn the facts The difficult task of controlling mosquitoes in Florida is an ongoing challenge We have learned from others that have failed to utilize multiple control methods and relied too heavily upon one method

Pesticide resistance of malarial mosquitoes presents a real danger to public health For example the over-use of DDT for malaria conshytrol as well as crop protection in Sri Lanka failed to prevent the disease and resulted in over 400000 cases of malaria in 1975 Cotton farmers in El Salvador and Guatemala have been drenching their fields with every known insecticide These actions have produced malaria mosquitoes resistant to all chemishycals Mr Reese is right on one count If you fool around with nashyture it can kill you

middot- -zach --Prumiddotsa_~ ~Enviroomental middot As$9ciate and Fred Harderi -CQri$Jitan_t_ are with middott_ll_e Reedy middotmiddot Creek lniproverrientDistrict in -

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Most modern mosquito control operations include larviciding as an integral part of their pest manageshyment practices Mosquito larvicides are available in a wide range of types and formulations Dry formushylations include briquets granules and pellets

Formulations usually are applied directly out of the container genershyally with no need for mixing Some sand formulations may be made on site by following instructions proshyvided on the labels There is usushyally a range of rates for each forshymulation to cover different habitats and water quality depth movement and organic content plus other facshytors discussed on product labels

Selecting the formulation and application rate that gives you the best coverage for your larval habishytats requires some thought Dryshyformulated larvicides may be apshyplied by hand with ground equipshyment and by air In this article we focus on ground applications and calibration as we have in the previshyous two articles in this series

Calibration is an encompassing principal that includes

1 determining what insecticide formulation to use

2 the rate of toxicant per acre to apply

3 the total spray volume needed to use to get good coverage

4 determining (or setting) the flow through the nozzle

5 determining the effective swath width and if appropriate the walking pace of application

14 Fall1997

After these parameters are set the applicators should practice by spraying a measured area against the clock Through practice the applicator will develop visual cues and hand-eye coordination which leads to standardizing hisher covshyerage per minute These factors apply to granular blowers horn seeders and other dry formula apshyplication tools including aerial spreaders

Choosing The Formulation

The three active ingredients most commonly used in dry larvishycide formulations are temephos sshymethoprene and delta-endotoxin (Bti) All three may be mixed with plaster (eg Altosid Briquetsreg Altosid XR Briquetsreg Altosid Pelshyletsreg and 5 Skeeter Abatereg) with food substances (Bactimos Pelshyletsreg) or with cork (Bactimos Brishyquetsreg) They also may be attached to ground-up corncob (eg Vectobac Greg and Vectobac CGreg) paper pulp waste material (eg Abadac which is liquid Abate plus Biodacreg Aitodac which is Altosid Liquid Larvicidereg plus Biodac) or sand (eg 1 Skeeter Abatereg LarvXSGreg and Aitosand which is Altosid Liquid Larvicide plus sand) Briquets generally are designed for use at rates ranging from 1 per 200 square feet (218 per acre) to 1 per 25 square feet (1742 per acre) A typical application rate is 1 per 1 00 square feet (436 per acre) in many situations Some granular products may be applied at up to 20 lbs per

acre but applicators typically used 5-10 lbs per acre

Briquets and pellets slowly reshylease toxicants to provide sustained control for one or more months The Bti toxicants are stomach poisons which must be placed in that part of the water column where the tarshyget larvae feed S-methoprene and temephos are contact poisons which mix with the entire water column Bactimos Briquets which float are primarily a mixture of Bti and cork and are often staked in place to prevent their being moved by wind waves and animals Altosid Briquets Altosid XR Brishyquets Altosid Pellets and Skeeter Abate Pelletsreg are made with plasshyter and sink to the bottom Some mosquito control agencies place briquets in fine wire mesh baskets and suspend them in storm drains just above the bottom so they are not swept away or buried Sand formulations also sink but a new Bti formulation LarvXsg is coated with vermiculite which reshyleases and carries the Bti back to the surface from which it is reshyleased Some Bti corncob granshyules in each bag will float while othshyers may sink This is also true for formulations using Biodac as a carshyrier

Briquets are most commonly dispensed by hand but Clarke Equipment Companys Arrow Gunreg is sometimes used to broadcast Altosid Briquets but not Bactimos Briquets The Arrow Gun uses compressed air captured from a non-thermal ULV aerosol generashytor to propel briquets down its barshyrel It may be used for lobbing one

or a few briquets into isolated small pools where placement is not a critishycal issue both in terms of cost and eHiciency Applicators may also use a slingshot The Arrow Gun works very well for applying pellet ground corn cob and other granushylar carrier formulations in large amounts In order for the equipment to be used properly as with any application equipment it must first be calibrated

Figure 1 shows release rates for Altosid Briquets Altosid XR Brishyquets and Altosid Pellets These curves are adapted from an article by Dr Doug Ross et a called Methoprene concentrations in freshwater microcosms treated with sustained-release Altosid formulashytions (Mosquito News 1994 Vol 1 0(2 pt 1 pp 202-21 0 They are indirect measures of release rates derived by measuring the concenshytration of active ingredients in the water Notice that the AI is not reshyleased uniformly throughout the active life of the formulations Conshysider this when you are larviciding We suspect that most solid larvishycides have characteristic release rate curves but we are not aware of any published descriptions If we could tap into the EPAs confidenshytial data files we might be able to find out more about this topic

In a large rectangular area usshying a 1 briquet1 00 sq ft applicashytion rate if briquets are placed in the recommended 1 0 foot intervals in even rows the maximum (diagoshynal) distance between two adjacent briquets is a little over 14 feet Imagshyine a square with a briquet in each corner and mosquito larvae in the center a little over 7 ft from each briquet To decrease the maximum diagonal distance between briquets to 1 0 feet while still placing briquets every 10 feet in rows stagger the rows so the briquets in the second row are between the briquets in the first row Materials science tells us this is the most efficient spacing scheme We recommend practic-

ing briquet placement in a mowed yard prior to actual field work This will allow you to get your spacing right Monroe County (Florida) Mosquito Control District field pershysonnel typically hand-apply over 20000 Altosid Briquets every year by walking their breeding sites with a 2 gallon pail full of product

STAGGERED X X X

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Another problematic situation occurs when treating a narrow ditch If a ditch averages 8 feet wide you would apply a briquet every 125 linear feet to get the 1 briquet per 1 00 sq feet If the ditch averaged 2 feet wide you would apply one briquet for every 50 linshyear feet In the case of a narrow ditch and in the absence of any external mixing forces such as wind or water flow the concentrashytion will be higher than expected adjacent to the briquet because the toxicants cannot disperse equal distances in all directions In addition the concentration of AI at the center point between adjacent briquets may be below the lethal dose Exposure of mosquito larvae to sublethal doses may result in resistance to the AI If the water is flowing the problem is solved but you may get accelerated briquet erosion Altosid Briquet labels provide instructions for treatshyments in moving water

East Volusia Mosquito Control District (Florida) developed a method to apply a whole seasons worth of Altosid (30-day) Briquets

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DAYS AFTER APPLICATION

Figure 1

Release rates for Altosid Briquets altosid XR Briquits and Altosid Pellets

Fall1997 15

at one time They cap a 6-8 inch section of 1-inch ID PVC pipe atshytach this (cap-side up) to an alumishynum stake (packing tape works great) and drill a 38 inch hole through it at the other end Brishyquets are inserted into the cylinder sometimes with color coded poker chips as spacers and a wire is run through the hole (or the stake is bent inward) to prevent the briquets from falling out prematurely The stake is driven into the bottom at the breeding site As the breeding site is flooded the bottom briquet erodes away releasing AI Trapped air prevents water from reaching the other briquets Another briquet falls down to take its place when it is about gone A field inspector can count poker chips to see how many Altosid Briquets have been used up

When bottom contours are highly irregular and the water depth is shallow and decreasing you may

not want to use briquet formulations at all Consider whether or not the briquet will ever be isolated from any part of the intended treatment area during its active life If so larshyvae may escape control efforts The amount of carrier material used can dictate the quality of control you achieve and is a very important consideration Unless we formulate our own pesticides we must work with a fixed amount of toxicant per pound as determined b~middot the manushyfacturer for an average situation Wouldnt it be nice to have a series of dry formulations based on the same AI that best fit different situashytions

Consider Figure 2 for a moment It shows the approximate average number of particles per square yard for four different carriers This graph is the result of investigations by students attending the weekshylong Florida Mosquito Control Asshysociation Dodd Short Courses on

Larviciding during 1996 and 1997 plus the work of Pasco CMCDs John Schaediger who washed and counted thousands of grains of sand Notice that 6 pounds of Biodac1200 contain about the same number of particles as 1 0 lbs of 1 014 grit corn cob If you have determined that 1 0 lbs of Vectobac CG (which uses 1 014 grit corn cob) is the correct application rate for you then perhaps 6 pounds of Biodac 1200 formulated with the same amount of Bti will do the same job and save you 40 in weight At these rates they both contain approximately the same number of carrier particles per pound The weight difference could increase the economics of aerial application where the lower weight translates into more acres per payshyload per flight

We apply 75 lbs of granulated 1 014 grit corncob per acre as our base rate This includes both in-

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house mixes of blank granules with active ingredients and commercially finished products The 75 lbs is not just a figure that has been pulled out of the sky but one that many trials and observations have shown to be necessary to get good coverage with a variety of bottom contours and vegetation types You may need a different base rate When field personnel are conshyfronted with heavy detritus or vegshyetation aggregated larvae or a preponderance of late in star larvae they can then increase their applishycation by slowing down their pace or narrowing the swath to raise the dosage of pesticide (remembering to stay within the maximum labeled rate)

Whatever the formulation the proper application is critical to the efficiency and effectiveness of your program Larvicide labels comshymonly include only very general guidelines for application techshyniques or equipment selection This latitude allows applicators and technical staffs to choose a system that works best for their circumshystances A granular label notes the material should be applied unishyformly in conventional aerial and ground equipment

Equipment Calibration

Equipment calibrations are imshyportant for the effectiveness of your operation Consistency is born out of practice on top of more practice Failures of larvicides are often atshytributed to missed areas caused by poor applications Calibrating flows on dry application equipment is done either by timing how long it takes for a known amount to pass through the unit or by collecting all the material blown from the nozzle for a fixed period of time and then weighing it Either should be done by two people one that handles the machine and one that does the timshying The collection method retains

the material for subsequent tests but may restrict the flow on certain machines Machines with powershyful air blasts can only be checked by timing the discharge of a known quantity

Knowledge of the flow rate and of factors affecting it are critical to calibration The most common powshyered ground equipment used for dry applications is the gasolineshyengined backpack mistblower duster The units are capable of providing even coverage good throw and are simple to use They typically broadcast granules in a 40-60 ft swath width with the operator walking at 1-3 miles per hour This translates to 5-20 acres per hour of spray time Several things can be done to change the flow rate with the nozzle orifice or disc as the primary determinate Changing the pressure will also change the flow but to a much lesser degree and it has other side effects Some power dusters have movable grates that regulate flow over the normal opshyerating range Some brands have a series of replaceable orifice discs that allow discharge rate changes in small steps Blower speed also affects the throw but that should have marginal effect on the disshycharge rate

Other ground equipment that may be used include crank slinger seeders horn seeders and modishyfied ULV equipment (eg Arrow Guns mentioned above) The flow of spinning disc spreaders or othshyers with a mechanical agitator may be somewhat affected by the opshyerational speed Horn seeders which have about a 20 ft swath width when applying Bti granules are often used by our field personshynel to treat small sites They have replaced the Dipper and Bucket method where an applicator fills a dipper from a bucket of granules and then carefully and evenly broadcasts them

An Example

Assume you have determined that you can comfortably apply B ti corncob granules in 50ft swaths at 2 mph (121 acreshour) using a duster and you want to apply them at 25 to 10 lbsacre To get proper coverage in typical vegetation you will use 5 lbsacre and when conshyfronted with adverse conditions you may double or in this case with a maximum label rate of 20 lbs acre quadruple the application to get the proper dosage of pesticide to the insect

Fill the hopper with granules making sure not to get any pieces of paper or other debris mixed into the product If the unit is equipped with an air agitation system make sure that it is operational Start the engine and make sure that the granules are free flowing through the nozzle If the unit is equipped with an adjustable gate style regushylator center it for an initial trial Close the flow control For collectshying granules you need a nylon stocking and a scale that measures to ounces or grams Place the stocking over the discharge tube and secure it with a rubber band The stocking should be supported so it wont pinch the air flow off Run the blower up to speed and then open the flow valve as you start timing Have the operator open the valve as the stop watch is started

Because of the very low flows (small quantities) of granules needed take a sample over a given period in the 3-5 minute range Shut the flow off as the timer notes the end of the period Pull the colshylection into the bottom of the stockshying and remove it from the nozzle Place another stocking on the duster and collect a second sample and then a third sample Collect at least three samples weigh each and average the results Be sure to subtract the weight of the stock-

Fall1997 17

ing before calculating the average If one sample volume is much higher or lower than the other two samples then replace the odd sample with a new one Assume you collected three 5-minute samples that weigh 61 64 and 59 oz each The average is 61 3 oz5 min or 1227 ozmin

Practice

Swath tests are best done inishytially using a paved surface such as a parking lot for a practice spray plot because the granules are easshyily seen Blank granules for pracshytice and for your own formulating may be purchased from The Andersons (800-537-3370) and other sources Get 1014 grit if you use Vectobac CG or an equivalent and 58 grit if you use Vectobac G or an equivalent Fill the hopper with a weighed quantity of granules and walk over the plot trying to cover the entire area with an even dosage To determine how much was applied empty the hopper and weigh the material remaining Afshyter a good distribution has been

mast~red move onto a measured field where the terrain is more diffishycult and continue practicing Proshygressively move into more difficult areas as your skill level increases You can get to the point where you know what 5 lbsacre looks like in any habitat and then when you apshyply the real stuff you will know you have done so properly

Assume your practice spray plot is 18 of an acre Therefore to get the proper dose you want to apply 18 of 5 lbs (0625 lbs or 10 oz) to the plot You earlier calculated that your duster is putting out approxishymately 1225 oz per min The calshyculated time to put out the 1 0 oz required to treat the test plot is 082 minutes or49 seconds [determined by dividing 10 ounces by 1225] You also determined that you can treat 121 acreshour at a 2 mph walking speed At that speed you can treat about 16 of an acre in 49 seconds You have three choices to adequately cover your 18 acre practice plot 1) You can walk at your normal speed and apply at a rate slightly higher than 5 lbsacre 2) you can walk a little slower and

BVA

apply at the normal rate or 3) you can decrease the flow rate a bit to achieve the target rate at your norshymal application speed The choice is yours

If you have any questions feel free to contact the authors at Pasco County Mosquito Control District 2308 Marathon Road Odessa Fl 33556 Phone 813-376-4568 Fax 813-376-470 Email pcmcdgtenet

~

Doug middot wassmer _ _Jim middot _ Robinson middotand Jack-Frerich middotmiddot middot are-middot vyith the pascomiddotmiddotc_qun~y middot Mosquito Control bistr_ict middot

middot Odessa middotFiorida middotmiddot-_ middot middot middot _ middot_

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In order to control or eradicate vector-borne disease the world Health Organization launched a substantial program of research on the screening evaluation and deshyvelopment of pesticides for the conshytrol of disease vectors and human pests in the early 1960s This proshygram of research and development continued into the 1970s Various collaboration centers and WHO regional research laboratories were involved in this multiphasic evaluashytion and research program This program was later designated as WHO-PES (WHO Pesticides Evaluation Scheme) which inshycluded laboratory screening of new pesticides and their formulations and finally small-scale and largeshyscale village field trials where effishycacy safety and feasibility of applishycation were studied Additionally whenever possible impact on the level of endemic diseases was also assessed The 41

h phase of this scheme addressed specification of pesticides and their formulations to be used in vector control

The WHO-PES program evenshytually came to a halt in the eighties and with restructuring of the vector Biology and Control Division in WHO this program came to a grinding halt It soon became apshyparent that member countries carshyrying on substantial vector control programs especially mosquito conshytrol operations soon reached the stage when appropriate tools and strategies for use in operational programs became quite scarce Member countries put forward deshymands for the development of more effective and safer chemical and

20 Fa111997

biological control measures To reshyspond to this global demand the Division of Control of Tropical Disshyeases (CTD) at WHO reinvigorated the WHO-PES Program by holding an informal consultation on the Evaluation and Testing of Insectishycides on October 1996 where I was asked to serve as the Chairperson of the consultation Copies of the report of this Consultation can be obtained from Dr Zaim Morteza whose address appears at the end of this article

As a result of the Informal Conshysultation and other discussions held at WHO regarding the future need for public health pesticides CTD recently (1996) launched the GCDPP program This is indeed a crucial program which requires colshylaboration among national and inshyternational agencies research inshystitutions industry and regulatory agencies The main objectives elshyements and scope of this program are briefly discussed below

The main objectives of the GCDPP program are

bull To facilitate the search for alternative pesticides including mishycrobial pesticides as well as applishycation methodologies

bull To advise on the relative priority of activities within the manshydate of GCDPP

bull To advise on issues related to the development and use of pesshyticides and application equipment within the context of WHOs global disease control strategies

bull To promote harmonization of activities related to pesticide deshyvelopment and safe use

bull To promote and encourage the highest quality of work through appropriate resource mobilization

bull GCDPP will serve as an advisory group to CTDWHOPES in matters of pesticide developshyment safe and proper use and apshyplication equipment

Membership and Meetings

A number of agencies organishyzations and manufacturers of pesshyticides and application equipment will become members of GCDPP as well as foundations and WHO Collaborating Centers Other groups and -organizations involved in manufacturing pest manageshyment and crop protection will also be invited Attempts will be made to maximize representation but at the same time ensure appropriate balance In addition to the above distinguished scientists and direcshytors of WHO Regional Offices may also be invited to attend the meetshyings of GCDPP

GCDPP will provide a forum for the exchange of technical informashytion and oversee the WHO-PES biennial plan and collaboration with other organizations and institutions GCDPP will meet every other year in Geneva Switzerland Informal consultation meetings on specific topics will be convened as the need arises CTD will be responsible for the organization of such meetings

continued on page 25

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How many of you know the names Norma Jean Baker Cornelius Magillicutty dichloroshydiphenyl-trichloro-ethane Haliaeetus leucocephalus and its distant relative Taxodium distichum How about Aedes albopictus Well if you are willing to bet $100 you know all six withshyout looking at the answers then you are either very bright very old well read or have too much time on your hands If you know only one I hope its the Asian tiger mosquito What if for the remaining five I gave you the hints of Some Like it Hot baseball legend insecticide whiteshyheaded bird and tree with knees The older ones amongst us and thats getting to be a higher percentshyage each year should recognize Marilyn Monroe and Connie Mack for the first two All of you should be ashamed of yourself if you dont recognized DDT The last two reshylated by name only are Bald Eagle and Bald Cypress If you got both of those you are probably psychic and also know what the point of this article is

And what is the point of this arshyticle the need for common names for mosquitoes Most of us know the birds plants and mammals by their common names Why then must we for the most part use scishyentific names for mosquitoes There are other names that would be more meaningful easier to spell and certainly easier to pronounce Ill bet my $100 right now that 50 of us couldnt spell Toxorhynchites or taeniorhynchus in a spelling bee Thank goodness Aedes abopictus had a catchy common name when

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it became established in the US in 1985 Never mind that the common name conjured up all sorts of wrong impressions Asian tiger mosquito was a lot easier for the public and press and I dare say most mosshyquito control practitioners to undershystand and remember Also our friends at the Entomological Socishyety had the accepted common name as Forest Day mosquito but to their credit they changed it to what every one calls it the Asian tiger mosquito

So despite their scientific bent scientists can be influenced to change their minds If common names and abbreviations too didnt have a purpose that is to help us to communicate then we would all be saying too many long boring and confusing sentences Consider the following For years Cornelius Magillicutty sprayed his back yard with dichloro-diphenylshytrichloro-ethane for Aedes abopictus and then years later with Norma Jean Baker at his side watched the thin-shelled eggs of Haliaeetus leucocephalus drop out of 500-year old Taxodium distichum that he loved so much Yawn

Its that kind of phraseology that keeps people including some scishyentists from reading the scientific literature When trying to commushynicate any word or phrase that your listener doesnt know or understand tends to confuse them annoy them or make them feel inferior and that often makes them stop listening Communicating with the public has become a major mosquito control activity in recent years When com-

municating with the public scientific terms and jargon are neither desirshyable or necessary Mosquito control activities can be explained in very simple terms We could use the term Bacillus thuringiensis var israeensis instead of BTl but how many of us do Telling the average person SLE is an arbovirus doesnt give them any more information than telling them its a virus

And whats with this italics stuff for scientific names Ask people (inshycluding you perhaps) why we italishycize scientific names and most will probably guess that its to emphashysis the term Wrong If you care why look it up Lets forget it from now on OK If you cant write Culex quinquefasciatus without italics then consider my alternative-comshymon names that dont need to be italicized

The Entomological Society of America has a committee that conshysiders and usually rejects proshyposed official common names for insects There are only 14 mosshyquitoes on that list and I dare say most of us dont use most of them The problem with this list is that it was developed by scientists and everyone knows that all scientists are mad not just those in the movshyies Scientists want to do things in a scientific manner-logical meshythodical and precise Just because the entomological journals will only let you use accepted common names in their pages doesnt mean we cant use other common names in presentations and io print and we should

Fall1997 23

What we need is a list of comshymon names that the average mosshyquito control practitioner uses No one that anyone takes seriously will say they found some Culex pipiens quinquefasciatus (note no italics) in a polluted pond Most will say quinks Sure we can capitalize Quinks if it makes you feel better it does me So why are we afraid to write Quinks in our reports or say Quinks in formal talks Most people probably dont say quinks (see I dont insist on capitalization) because they think it makes them sound unprofessional Quinks is a distinctive short easy to rememshyber and fun to say name it has a beat that you can dance to and I give it a 99 Does anyone you know call quinks the southern house mosquito the accepted common name How about northern house mosquito for pipiens

Taenies or taenys or whatshyever spelling you want to use is easily recognized by east and south coast mosquito people as the comshymon name for Aedes taeniorhynchus one of the saltmarsh mosquitoes Again its a distinctive short easy to rememshyber and fun name It also describes the size of the species somewhat small or teeny-a bonus And who doesnt use Tox as the common name for our other spelling bee example

We dont hesitate to use comshymon names for a group of mosquishytoes that breed in a particular habishytat In addition to saltmarsh mosshyquitoes we refer to floodwater mosquitoes (which incidently also describes many saltmarsh mosquishytoes) tree hole mosquitoes dirty water mosquitoes grey water mosshyquitoes freshwater mosquitoes container-breeding mosquitoes pasture mosquitoes rock hole mosshyquitoes crab hole mosquitoes and on and on These habitat names are not mutually exclusive For exshyample pasture mosquitoes are also floodwater mosquitoes and fresh-

24 Fall1997

water mosquitoes By the way the translation of floodwater mosquito according to the Entomological Soshyciety is Aedes sticticus What Habitat names are also convenient for discussions among people from different geographic areas For example nature tends to give the same qualities to mosquitoes that breed in tree holes regardless of whether they are tree holes in Calishyfornia Virginia Queensland or Borneo From an operational mosshyquito control standpoint knowing the habitat of the mosquito can be more informative than knowing its scientific name

So lets consider some common names of species that we might use One common pest and potenshytial vector species that needs a common name is Coquillettidia perturbans (I think Ive weaned myself from italics) the aggressive biter whose larvae attach to the roots of aquatic plants particularly cattails (I could have said Typha species) Cattail mosquito is a natural even though larvae may attach to a variety of plants Another name could be the salt and pepshyper mosquito or another name taken from its scientific name could be the perturbing mosquito

How about the Anopheles The accepted common name for Anopheles quadrimaculatus is the common malaria mosquito This may have been accurate when malaria was a problem in this counshytry but now neither malaria nor this mosquito is common in this counshytry Im sure most of our hypothetishycal naming committee made up of operational mosquito controllers would call them quads

We have already dealt with Quinks Another obvious common name for another Culex Cx salinarius is sally or sallys or sallies Culex restuans is a little more tricky but how about rusty Rusty is suggestive of the color of the mosquito and it is similar to

resty a name that just doesnt sound right to me

Aedes vexans a common floodshywater mosquito in much of the US needs a common name The acshycepted common name vexans mosquito would be OK if most people know what vexing means And if they do why not call it the vexing mosquito Calling Aedes aegypti in the US by its accepted name the yellowfever mosquito is misleading Yellow fever has been absent from the US since right after the turn of the century Aegypti or gyps is often used by field and lab workers so why not adopt those terms

I could go on and on but Im more interested in what you think If you will send me your common names (keep it clean please) for any species you are familiar with Ill be happy to compile them and report back in a future article in Wing Beats (Theres that italics again different reason) If they appear in Wing Beats maybe just maybe we can call them official common names You can fax me at 561-778-7204 or E-mail me at cdmognvifas ufledu By the way you can address the message to Charlie Chas or Char The only person I insist call me doctor is my ex-wife and I would rather she didnt call me at all

-C_h~ulie M~rtis middot is an Assoshy _ciate middotPi~fesso( at the Unishy versity ~f floridas Medical Eiitomology Laboratory middot hi middot middot

Verq Beach Fiorida~

continued from page 20

providing support for report prepashyration and other documents and perform secretarial functions

Funding

In order to advance the objecshytives of GCDPP a stable source of funding will be necessary WHO CTD (WHO-Division of Control of Tropical Diseases) will establish and administer a trust fund which will be designated as GCDPP-Trust Fund which will be administered according to the WHO financial rules regulations and practices

The trust fund will be used to convene meetings production and dissemination of documents exshychange and dissemination of inforshymation on the need for public health pesticides and equipment and for activities which will promote the development and use of alternative safe compounds or application equipment

1James of organizations institushytions foundations manufacturers and individuals participating and contributing to this program will be listed Each participant will be enshycouraged to make annual contribushytions to the trust fund

Further Information

For further information on WHOshyPES or GCDPP contact Dr Zaim Morteza WHO-PES CTD World Health Organ ization 1211 Geneva 27 Switzerland E-mail zaimmwhoch

Nlir smiddotMulla is a Profes-sor with the Deparfrilent of ~nt-oshy_mologyUniverslty at califor middot -nia Riversidemiddot CA92521 middot _ middot middot

-

middotMulla= Receives -middot

Recognition Awar(j _

Mir S Mulla Professor of Entoshymology Department of Entomolshyogy University of California Rivershyside CA was presented the Scishyence Society of Thailand~ Meritoshyrious Recognition Award by the Thailand Minister of Science and Technology last October

Mulla an authority on insects of medical and public health imporshytance was cited for his efforts and leadership in organizing the First International Symposium on Biopesticides convened at Naresuan University in Thailand This symposium attended by some 300 participants from 20 countries covered biodiversity safety toxicshyity efficacy and proper use of biopesticides based on natural products and pathogenic organshyisms The proceedings of this first symposium amounting to 300 pages will be published soon

Mulla informs us that the 2nd International Symposium on Biopesticides will be held in late October 1998 on Langkawi Island off the coast of Malaysia Anyone interested in receiving further inforshymation regarding the proceedings or the second symposium should contact Dr Mulla at tel (909) 787-5818 fax (909) 787-4210 and eshymail mulla mailucredu

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Fall1997 25

Notice Psotophora middotgtcyaneseens collect~d middotin Aiachua County FL

- ~

and 9 pupae of this species were collected by the author from a sunshylit small (ca 2 m diam and 20 em deep) grass-lined pool filled with rainwater at Gainesville Florida

a common identification number with their 41h instar larval and pupal exuviae On subsequent visits to the site no additional Ps cyanescens were collected

Psorophora cyanescens (Coquillett) previously has been reported in Florida from the followshying counties Bay Duval Escambia Gadsden Hillsborough Jackson Leon Okaloosa Suwannee and Union (HT Evans Florida Mosquito Control Handbook 1994) On 26 May 1997 one 4h instar larva

Also collected from the pool were numerous larvae and pupae of Psorophora columbiae (Dyar and Knab) Aedes vexans (Meigen) and Culex salinarius Coquillett and 17 4h instar larvae of Psorophora ciliata (Fabricus) All immatures were individually reared and the resulting adults were linked by

John -Fmiddotmiddoteeinert is with Jlie CeMte(for Medicental middotAgricultural

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REGISTRATION FOR WORLD DIRECTORY OF ARTHROPOD VECTOR RESEARCH AND CONTROL SPECIALISTS

In order to update the Directory we would appreciate your completing this form Please type or print and return it to the address listed below We would also appreciate your copying this form and supplyshying it to any colleagues who are working in this field Your cooperation will allow greater communication and efficiency within our profession

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Please return by Air Mail to Dr Eugene Gerberg Chairman AMCA International Affairs Committee 5819 NW 57th Way Gainesville FL 32653-3257 USA

Fall1997

Date completed

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Page 9: Wing Beats Volume 8 Number 3wingbeats.floridamosquito.org/Wingbeats/pdfs/Vol8No3.pdf · 2014. 4. 11. · Stan Cope, Norfolk, VA Betsy Field, Vero Beach, FL John Gamble, New Smyrna

continued from page 8 sensitivity to disturbance and the afshyfinity of Culex erythrothoraxlarvae for vegetation make sampling by dipper very difficult and unreliable

[ Bloodfee~fng middot__ middot_ _ J

Culex erythrothorax is an opporshytunistic feeder which shows a disshytinct east-west cline in feeding prefshyerences In the eastern part of its range individuals collected near Salt Lake City were found to feed primarily on birds In southeastern California engorged individuals were found to feed equally on birds and mammals In much of central and southern California blooded females fed primarily (about 90 of identifiable blood meals) on mammals Rabbits cattle dogs and humans are among the most commonly utilized mammalian hosts

middot middot s~rvival- and middot _ Dispersat ~~ middot

Comparatively good survival of adult females and limited dispersal tendencies are two important facshytors causing large host-seeking populations to develop in the vicinshyity of bulrush marshes At well esshytablished wetlands in southern Calishyfornia it is not uncommon to colshylect between 10000 and 33000 females per C0

2-baited trap per

night during the summer Female survivorship is typically higher than for other co-occuring congeners Compared to other Culex species host-seeking Culex erythrothorax females typically disperse short disshytances Host seeking females are rarely collected more than 2 to 25 kilometers from developmental

sites However local wind condishytions and the availability of hosts may cause large numbers to disshyperse distances greater than 25 km (15 miles) from natal sites The anthropophily of this species could make Culex erythrothorax a distinct pest of humans residing near wetshylands

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Position middot Announcement

MOSQUITO CONTROL MANAGER

HERNANDO COUNTY FL

Responsible for the planning supervision and direct execution of environmental programs operated by the County

REQUIREMENTS Graduation from a 4-year college or university with a degree in entomology or the basic sciences Five years experishyence in the operation of mosquito control or environmental programs Certification in the category of Pubshylic Health Pest Control in conformity with Public Law 92-515 regulating the application of restricted use pesticides in the State of Florida State Certification in the category of Right-of-Way Pest Control State Certification in the category of Aquatic Weed Control Must posshysess and maintain a valid Florida drivers license and be insurable by Countys current insurance carrier

Open until filled Pay Grade 21 0 Salary $321 09annually To receive an application or send a resume write to Hernando County Human Resourses 20 North Main Street Room 260 Brooksville FL 34601 or phone (352)754-4120 EOEAAMF0V and Drug-Free Workplace

12 Fa111997

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Meetings of Interest

FMCA Annual Fall Meeting November 16-20 1997

1997 Annual Fall Meeting of the Florida Mosquito Control Associashytion Radison Ponce de Leon Reshysort in St Augustine FL

For more information contact Shelly Redovan PO Box 60837 Fort Myers FL 33906-0837 Tel (941) 694-2174 Fax (941) 694-6959

Entomological Society of America Annual Meeting December 13-18 1997 Nashville TN

Contact (301) 731-4535 or e-mail meetentosocorg

Info is available on the web at httpwwwentosocorg

MVCAC Annual Conference January 25-28 1998

661h Annual Mosquito and Vecshytor Control Association of Califorshynia Conference Tenaya Lodge Fish Camp California

Contact Don Eliason at Tel (916) 685-2600 Fax (916) 685-1768 e-mail movcacaolcom

WCMVCA Annual Meeting February 19-201998

West Central Mosquito and Vecshytor Control Association meeting at the Grand Vista Hotel in Grand Junction CO

Contact Wayne Kramer at (402)471-0506 for more informashytion

AMCA Annual Meeting March 8-12 1998 John Ascuagas The Nuggett

(800)648-1177 in Sparks Nevada

Contact AMCA Central Office (318) 47 4-2723 for more informashytion

North American Conference on Pesticide Spray Drift Management March 29-April 1 1998 Holiday Inn by the Bay Portland Maine

For further information contact Jim Dill UMCE Pest Management Office 491 College Ave Orono ME 04473-1295 Tel (207) 581-3880 Fax (207) 581-3881

Visit their Web Site at httpwwwstatelleus

agriculturedrift1htm

continued from page 10 All Im suggesting is that we have

put up with extremists and village idiots long enough and wed better settle back into down-to-earth realshyistic work in the fields of public health public safety and governshyment in general Weve allowed the inmates to run the asylum long enough Now its time for a return to normal behavior normal actions and sensible science

Daffy ideas and ideology notshywithstanding if you play around with nature it will kill you -~

~charley Ree~e i$ ~ middot synCti middot -cated columnist with the _ Orla~dQ _Sentinel lie _can ~e reached __ by email at middot -

middot - OSOre~se~aol_corn -- middot -~ middot copy 1997~ Klt-_G FEA_TURE middotsvNDICATE-INC-middot

- Editorsmiddot_Vote-Themiddot previ6middotus articent1~ - w$smiddot i ri ~~

eluded-to sHmul~te tllowght middotandmiddot hopefully elicit a -response from our readers middot- Wel i ltludn~i our -editorial procentessmiddot it was brought to my atten-middot tion -f~at a responsemiddot _to this-article had-alreadY be-E3ri submitted to __ the Orlando -sentineL - instead of pub Hshingmiddot this response lnih~ ~next i5sue of WingBeats 1-chose middotto ind~demiddot it akgtrig wi_th tflis articlemiddot -to _provfde another viewpoint wmiddotIJich -rnay h~lp to-correct a few oftlie inaccuracies

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Charlie Reeses August 14th colshyumn proclaims that the preservashytion of wetlands and the reduction of pesticide spraying near these areas will in the near futu re lead to many cases of malaria and other diseases He states that this is environmental extremism and not realistic

Unfortuntely his sensible scishyence lacks the support of actual facts For instance the 1 200 cases of malaria per year in the United States for the past six years are almost all imported cases conshytracted in other countries where conditions are more conducive to transmission Only a handful of malaria cases transmitted within the states have been recorded within the last 40 years Although the draining of swamps and spraying of pesticides did play a role in the reduction of malaria in Florida they were only a portion of the solution Window and door screenings coupled with the spread of air conshyditioning throughout Florida played a large role in keeping mosquitoes out of houses where pesticides couldnt reach

Furthermore the mosquitoes that transmit yellow fever and dengue do not breed in swamps but in small containers (such as flower pots and rain gutters) scattered thoughout every neighborhood Pesticides are often ineffectual against these urban mosquitoes So window screening again played a major role in reducing these two diseases in Florida

Although wetlands are the known breeding grounds for many mosquitoes manipulated wetlands such as rice fields in Texas orange groves cattle pastures and cane fields in Florida actually pose a much larger threat to people in

terms of producing large numbers of disease vectors The alleged value of swamps that Mr Reese mentions lies in the functions of rain and stormwater collection and disshypersal Without such wetlands rain must go somewhere and many low-lying agricultural areas such as rice fields and orange groves turn into mosquito breeding grounds

Draining swamps and spraying pesticides are not a magic bullet for mosquito and disease control Reliance on these methods alone has taught mosquito control and health officials harsh lessons Mosshyquitoes and the diseases they spread have complicated life cycles which can intertwine with our own socioeconomic cycles

Mr Reese should contact the village idiots and extremist who work daily in mosqito control to learn the facts The difficult task of controlling mosquitoes in Florida is an ongoing challenge We have learned from others that have failed to utilize multiple control methods and relied too heavily upon one method

Pesticide resistance of malarial mosquitoes presents a real danger to public health For example the over-use of DDT for malaria conshytrol as well as crop protection in Sri Lanka failed to prevent the disease and resulted in over 400000 cases of malaria in 1975 Cotton farmers in El Salvador and Guatemala have been drenching their fields with every known insecticide These actions have produced malaria mosquitoes resistant to all chemishycals Mr Reese is right on one count If you fool around with nashyture it can kill you

middot- -zach --Prumiddotsa_~ ~Enviroomental middot As$9ciate and Fred Harderi -CQri$Jitan_t_ are with middott_ll_e Reedy middotmiddot Creek lniproverrientDistrict in -

middotmiddot Lake Buena vlst~ - FL middot- middot middot

Fal11997 13

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Most modern mosquito control operations include larviciding as an integral part of their pest manageshyment practices Mosquito larvicides are available in a wide range of types and formulations Dry formushylations include briquets granules and pellets

Formulations usually are applied directly out of the container genershyally with no need for mixing Some sand formulations may be made on site by following instructions proshyvided on the labels There is usushyally a range of rates for each forshymulation to cover different habitats and water quality depth movement and organic content plus other facshytors discussed on product labels

Selecting the formulation and application rate that gives you the best coverage for your larval habishytats requires some thought Dryshyformulated larvicides may be apshyplied by hand with ground equipshyment and by air In this article we focus on ground applications and calibration as we have in the previshyous two articles in this series

Calibration is an encompassing principal that includes

1 determining what insecticide formulation to use

2 the rate of toxicant per acre to apply

3 the total spray volume needed to use to get good coverage

4 determining (or setting) the flow through the nozzle

5 determining the effective swath width and if appropriate the walking pace of application

14 Fall1997

After these parameters are set the applicators should practice by spraying a measured area against the clock Through practice the applicator will develop visual cues and hand-eye coordination which leads to standardizing hisher covshyerage per minute These factors apply to granular blowers horn seeders and other dry formula apshyplication tools including aerial spreaders

Choosing The Formulation

The three active ingredients most commonly used in dry larvishycide formulations are temephos sshymethoprene and delta-endotoxin (Bti) All three may be mixed with plaster (eg Altosid Briquetsreg Altosid XR Briquetsreg Altosid Pelshyletsreg and 5 Skeeter Abatereg) with food substances (Bactimos Pelshyletsreg) or with cork (Bactimos Brishyquetsreg) They also may be attached to ground-up corncob (eg Vectobac Greg and Vectobac CGreg) paper pulp waste material (eg Abadac which is liquid Abate plus Biodacreg Aitodac which is Altosid Liquid Larvicidereg plus Biodac) or sand (eg 1 Skeeter Abatereg LarvXSGreg and Aitosand which is Altosid Liquid Larvicide plus sand) Briquets generally are designed for use at rates ranging from 1 per 200 square feet (218 per acre) to 1 per 25 square feet (1742 per acre) A typical application rate is 1 per 1 00 square feet (436 per acre) in many situations Some granular products may be applied at up to 20 lbs per

acre but applicators typically used 5-10 lbs per acre

Briquets and pellets slowly reshylease toxicants to provide sustained control for one or more months The Bti toxicants are stomach poisons which must be placed in that part of the water column where the tarshyget larvae feed S-methoprene and temephos are contact poisons which mix with the entire water column Bactimos Briquets which float are primarily a mixture of Bti and cork and are often staked in place to prevent their being moved by wind waves and animals Altosid Briquets Altosid XR Brishyquets Altosid Pellets and Skeeter Abate Pelletsreg are made with plasshyter and sink to the bottom Some mosquito control agencies place briquets in fine wire mesh baskets and suspend them in storm drains just above the bottom so they are not swept away or buried Sand formulations also sink but a new Bti formulation LarvXsg is coated with vermiculite which reshyleases and carries the Bti back to the surface from which it is reshyleased Some Bti corncob granshyules in each bag will float while othshyers may sink This is also true for formulations using Biodac as a carshyrier

Briquets are most commonly dispensed by hand but Clarke Equipment Companys Arrow Gunreg is sometimes used to broadcast Altosid Briquets but not Bactimos Briquets The Arrow Gun uses compressed air captured from a non-thermal ULV aerosol generashytor to propel briquets down its barshyrel It may be used for lobbing one

or a few briquets into isolated small pools where placement is not a critishycal issue both in terms of cost and eHiciency Applicators may also use a slingshot The Arrow Gun works very well for applying pellet ground corn cob and other granushylar carrier formulations in large amounts In order for the equipment to be used properly as with any application equipment it must first be calibrated

Figure 1 shows release rates for Altosid Briquets Altosid XR Brishyquets and Altosid Pellets These curves are adapted from an article by Dr Doug Ross et a called Methoprene concentrations in freshwater microcosms treated with sustained-release Altosid formulashytions (Mosquito News 1994 Vol 1 0(2 pt 1 pp 202-21 0 They are indirect measures of release rates derived by measuring the concenshytration of active ingredients in the water Notice that the AI is not reshyleased uniformly throughout the active life of the formulations Conshysider this when you are larviciding We suspect that most solid larvishycides have characteristic release rate curves but we are not aware of any published descriptions If we could tap into the EPAs confidenshytial data files we might be able to find out more about this topic

In a large rectangular area usshying a 1 briquet1 00 sq ft applicashytion rate if briquets are placed in the recommended 1 0 foot intervals in even rows the maximum (diagoshynal) distance between two adjacent briquets is a little over 14 feet Imagshyine a square with a briquet in each corner and mosquito larvae in the center a little over 7 ft from each briquet To decrease the maximum diagonal distance between briquets to 1 0 feet while still placing briquets every 10 feet in rows stagger the rows so the briquets in the second row are between the briquets in the first row Materials science tells us this is the most efficient spacing scheme We recommend practic-

ing briquet placement in a mowed yard prior to actual field work This will allow you to get your spacing right Monroe County (Florida) Mosquito Control District field pershysonnel typically hand-apply over 20000 Altosid Briquets every year by walking their breeding sites with a 2 gallon pail full of product

STAGGERED X X X

X X X

X X X

ABREAST

X X X

X X X

X X X

Another problematic situation occurs when treating a narrow ditch If a ditch averages 8 feet wide you would apply a briquet every 125 linear feet to get the 1 briquet per 1 00 sq feet If the ditch averaged 2 feet wide you would apply one briquet for every 50 linshyear feet In the case of a narrow ditch and in the absence of any external mixing forces such as wind or water flow the concentrashytion will be higher than expected adjacent to the briquet because the toxicants cannot disperse equal distances in all directions In addition the concentration of AI at the center point between adjacent briquets may be below the lethal dose Exposure of mosquito larvae to sublethal doses may result in resistance to the AI If the water is flowing the problem is solved but you may get accelerated briquet erosion Altosid Briquet labels provide instructions for treatshyments in moving water

East Volusia Mosquito Control District (Florida) developed a method to apply a whole seasons worth of Altosid (30-day) Briquets

-ltgt-BRIQUETS

10 15 20 25 30 35

-0- XR BRIQUETS

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DAYS AFTER APPLICATION

Figure 1

Release rates for Altosid Briquets altosid XR Briquits and Altosid Pellets

Fall1997 15

at one time They cap a 6-8 inch section of 1-inch ID PVC pipe atshytach this (cap-side up) to an alumishynum stake (packing tape works great) and drill a 38 inch hole through it at the other end Brishyquets are inserted into the cylinder sometimes with color coded poker chips as spacers and a wire is run through the hole (or the stake is bent inward) to prevent the briquets from falling out prematurely The stake is driven into the bottom at the breeding site As the breeding site is flooded the bottom briquet erodes away releasing AI Trapped air prevents water from reaching the other briquets Another briquet falls down to take its place when it is about gone A field inspector can count poker chips to see how many Altosid Briquets have been used up

When bottom contours are highly irregular and the water depth is shallow and decreasing you may

not want to use briquet formulations at all Consider whether or not the briquet will ever be isolated from any part of the intended treatment area during its active life If so larshyvae may escape control efforts The amount of carrier material used can dictate the quality of control you achieve and is a very important consideration Unless we formulate our own pesticides we must work with a fixed amount of toxicant per pound as determined b~middot the manushyfacturer for an average situation Wouldnt it be nice to have a series of dry formulations based on the same AI that best fit different situashytions

Consider Figure 2 for a moment It shows the approximate average number of particles per square yard for four different carriers This graph is the result of investigations by students attending the weekshylong Florida Mosquito Control Asshysociation Dodd Short Courses on

Larviciding during 1996 and 1997 plus the work of Pasco CMCDs John Schaediger who washed and counted thousands of grains of sand Notice that 6 pounds of Biodac1200 contain about the same number of particles as 1 0 lbs of 1 014 grit corn cob If you have determined that 1 0 lbs of Vectobac CG (which uses 1 014 grit corn cob) is the correct application rate for you then perhaps 6 pounds of Biodac 1200 formulated with the same amount of Bti will do the same job and save you 40 in weight At these rates they both contain approximately the same number of carrier particles per pound The weight difference could increase the economics of aerial application where the lower weight translates into more acres per payshyload per flight

We apply 75 lbs of granulated 1 014 grit corncob per acre as our base rate This includes both in-

200 --------------------------------------------------------------~

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1 2 3

Fall1997

4

daC 1200 BlO

1014 corncob

5 6

Pounds per acre Figure 2

7

58 corncob

8 9 I

10

house mixes of blank granules with active ingredients and commercially finished products The 75 lbs is not just a figure that has been pulled out of the sky but one that many trials and observations have shown to be necessary to get good coverage with a variety of bottom contours and vegetation types You may need a different base rate When field personnel are conshyfronted with heavy detritus or vegshyetation aggregated larvae or a preponderance of late in star larvae they can then increase their applishycation by slowing down their pace or narrowing the swath to raise the dosage of pesticide (remembering to stay within the maximum labeled rate)

Whatever the formulation the proper application is critical to the efficiency and effectiveness of your program Larvicide labels comshymonly include only very general guidelines for application techshyniques or equipment selection This latitude allows applicators and technical staffs to choose a system that works best for their circumshystances A granular label notes the material should be applied unishyformly in conventional aerial and ground equipment

Equipment Calibration

Equipment calibrations are imshyportant for the effectiveness of your operation Consistency is born out of practice on top of more practice Failures of larvicides are often atshytributed to missed areas caused by poor applications Calibrating flows on dry application equipment is done either by timing how long it takes for a known amount to pass through the unit or by collecting all the material blown from the nozzle for a fixed period of time and then weighing it Either should be done by two people one that handles the machine and one that does the timshying The collection method retains

the material for subsequent tests but may restrict the flow on certain machines Machines with powershyful air blasts can only be checked by timing the discharge of a known quantity

Knowledge of the flow rate and of factors affecting it are critical to calibration The most common powshyered ground equipment used for dry applications is the gasolineshyengined backpack mistblower duster The units are capable of providing even coverage good throw and are simple to use They typically broadcast granules in a 40-60 ft swath width with the operator walking at 1-3 miles per hour This translates to 5-20 acres per hour of spray time Several things can be done to change the flow rate with the nozzle orifice or disc as the primary determinate Changing the pressure will also change the flow but to a much lesser degree and it has other side effects Some power dusters have movable grates that regulate flow over the normal opshyerating range Some brands have a series of replaceable orifice discs that allow discharge rate changes in small steps Blower speed also affects the throw but that should have marginal effect on the disshycharge rate

Other ground equipment that may be used include crank slinger seeders horn seeders and modishyfied ULV equipment (eg Arrow Guns mentioned above) The flow of spinning disc spreaders or othshyers with a mechanical agitator may be somewhat affected by the opshyerational speed Horn seeders which have about a 20 ft swath width when applying Bti granules are often used by our field personshynel to treat small sites They have replaced the Dipper and Bucket method where an applicator fills a dipper from a bucket of granules and then carefully and evenly broadcasts them

An Example

Assume you have determined that you can comfortably apply B ti corncob granules in 50ft swaths at 2 mph (121 acreshour) using a duster and you want to apply them at 25 to 10 lbsacre To get proper coverage in typical vegetation you will use 5 lbsacre and when conshyfronted with adverse conditions you may double or in this case with a maximum label rate of 20 lbs acre quadruple the application to get the proper dosage of pesticide to the insect

Fill the hopper with granules making sure not to get any pieces of paper or other debris mixed into the product If the unit is equipped with an air agitation system make sure that it is operational Start the engine and make sure that the granules are free flowing through the nozzle If the unit is equipped with an adjustable gate style regushylator center it for an initial trial Close the flow control For collectshying granules you need a nylon stocking and a scale that measures to ounces or grams Place the stocking over the discharge tube and secure it with a rubber band The stocking should be supported so it wont pinch the air flow off Run the blower up to speed and then open the flow valve as you start timing Have the operator open the valve as the stop watch is started

Because of the very low flows (small quantities) of granules needed take a sample over a given period in the 3-5 minute range Shut the flow off as the timer notes the end of the period Pull the colshylection into the bottom of the stockshying and remove it from the nozzle Place another stocking on the duster and collect a second sample and then a third sample Collect at least three samples weigh each and average the results Be sure to subtract the weight of the stock-

Fall1997 17

ing before calculating the average If one sample volume is much higher or lower than the other two samples then replace the odd sample with a new one Assume you collected three 5-minute samples that weigh 61 64 and 59 oz each The average is 61 3 oz5 min or 1227 ozmin

Practice

Swath tests are best done inishytially using a paved surface such as a parking lot for a practice spray plot because the granules are easshyily seen Blank granules for pracshytice and for your own formulating may be purchased from The Andersons (800-537-3370) and other sources Get 1014 grit if you use Vectobac CG or an equivalent and 58 grit if you use Vectobac G or an equivalent Fill the hopper with a weighed quantity of granules and walk over the plot trying to cover the entire area with an even dosage To determine how much was applied empty the hopper and weigh the material remaining Afshyter a good distribution has been

mast~red move onto a measured field where the terrain is more diffishycult and continue practicing Proshygressively move into more difficult areas as your skill level increases You can get to the point where you know what 5 lbsacre looks like in any habitat and then when you apshyply the real stuff you will know you have done so properly

Assume your practice spray plot is 18 of an acre Therefore to get the proper dose you want to apply 18 of 5 lbs (0625 lbs or 10 oz) to the plot You earlier calculated that your duster is putting out approxishymately 1225 oz per min The calshyculated time to put out the 1 0 oz required to treat the test plot is 082 minutes or49 seconds [determined by dividing 10 ounces by 1225] You also determined that you can treat 121 acreshour at a 2 mph walking speed At that speed you can treat about 16 of an acre in 49 seconds You have three choices to adequately cover your 18 acre practice plot 1) You can walk at your normal speed and apply at a rate slightly higher than 5 lbsacre 2) you can walk a little slower and

BVA

apply at the normal rate or 3) you can decrease the flow rate a bit to achieve the target rate at your norshymal application speed The choice is yours

If you have any questions feel free to contact the authors at Pasco County Mosquito Control District 2308 Marathon Road Odessa Fl 33556 Phone 813-376-4568 Fax 813-376-470 Email pcmcdgtenet

~

Doug middot wassmer _ _Jim middot _ Robinson middotand Jack-Frerich middotmiddot middot are-middot vyith the pascomiddotmiddotc_qun~y middot Mosquito Control bistr_ict middot

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In order to control or eradicate vector-borne disease the world Health Organization launched a substantial program of research on the screening evaluation and deshyvelopment of pesticides for the conshytrol of disease vectors and human pests in the early 1960s This proshygram of research and development continued into the 1970s Various collaboration centers and WHO regional research laboratories were involved in this multiphasic evaluashytion and research program This program was later designated as WHO-PES (WHO Pesticides Evaluation Scheme) which inshycluded laboratory screening of new pesticides and their formulations and finally small-scale and largeshyscale village field trials where effishycacy safety and feasibility of applishycation were studied Additionally whenever possible impact on the level of endemic diseases was also assessed The 41

h phase of this scheme addressed specification of pesticides and their formulations to be used in vector control

The WHO-PES program evenshytually came to a halt in the eighties and with restructuring of the vector Biology and Control Division in WHO this program came to a grinding halt It soon became apshyparent that member countries carshyrying on substantial vector control programs especially mosquito conshytrol operations soon reached the stage when appropriate tools and strategies for use in operational programs became quite scarce Member countries put forward deshymands for the development of more effective and safer chemical and

20 Fa111997

biological control measures To reshyspond to this global demand the Division of Control of Tropical Disshyeases (CTD) at WHO reinvigorated the WHO-PES Program by holding an informal consultation on the Evaluation and Testing of Insectishycides on October 1996 where I was asked to serve as the Chairperson of the consultation Copies of the report of this Consultation can be obtained from Dr Zaim Morteza whose address appears at the end of this article

As a result of the Informal Conshysultation and other discussions held at WHO regarding the future need for public health pesticides CTD recently (1996) launched the GCDPP program This is indeed a crucial program which requires colshylaboration among national and inshyternational agencies research inshystitutions industry and regulatory agencies The main objectives elshyements and scope of this program are briefly discussed below

The main objectives of the GCDPP program are

bull To facilitate the search for alternative pesticides including mishycrobial pesticides as well as applishycation methodologies

bull To advise on the relative priority of activities within the manshydate of GCDPP

bull To advise on issues related to the development and use of pesshyticides and application equipment within the context of WHOs global disease control strategies

bull To promote harmonization of activities related to pesticide deshyvelopment and safe use

bull To promote and encourage the highest quality of work through appropriate resource mobilization

bull GCDPP will serve as an advisory group to CTDWHOPES in matters of pesticide developshyment safe and proper use and apshyplication equipment

Membership and Meetings

A number of agencies organishyzations and manufacturers of pesshyticides and application equipment will become members of GCDPP as well as foundations and WHO Collaborating Centers Other groups and -organizations involved in manufacturing pest manageshyment and crop protection will also be invited Attempts will be made to maximize representation but at the same time ensure appropriate balance In addition to the above distinguished scientists and direcshytors of WHO Regional Offices may also be invited to attend the meetshyings of GCDPP

GCDPP will provide a forum for the exchange of technical informashytion and oversee the WHO-PES biennial plan and collaboration with other organizations and institutions GCDPP will meet every other year in Geneva Switzerland Informal consultation meetings on specific topics will be convened as the need arises CTD will be responsible for the organization of such meetings

continued on page 25

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How many of you know the names Norma Jean Baker Cornelius Magillicutty dichloroshydiphenyl-trichloro-ethane Haliaeetus leucocephalus and its distant relative Taxodium distichum How about Aedes albopictus Well if you are willing to bet $100 you know all six withshyout looking at the answers then you are either very bright very old well read or have too much time on your hands If you know only one I hope its the Asian tiger mosquito What if for the remaining five I gave you the hints of Some Like it Hot baseball legend insecticide whiteshyheaded bird and tree with knees The older ones amongst us and thats getting to be a higher percentshyage each year should recognize Marilyn Monroe and Connie Mack for the first two All of you should be ashamed of yourself if you dont recognized DDT The last two reshylated by name only are Bald Eagle and Bald Cypress If you got both of those you are probably psychic and also know what the point of this article is

And what is the point of this arshyticle the need for common names for mosquitoes Most of us know the birds plants and mammals by their common names Why then must we for the most part use scishyentific names for mosquitoes There are other names that would be more meaningful easier to spell and certainly easier to pronounce Ill bet my $100 right now that 50 of us couldnt spell Toxorhynchites or taeniorhynchus in a spelling bee Thank goodness Aedes abopictus had a catchy common name when

- bull bull -middot ~ bull middot- ~ bull ~ bull

it became established in the US in 1985 Never mind that the common name conjured up all sorts of wrong impressions Asian tiger mosquito was a lot easier for the public and press and I dare say most mosshyquito control practitioners to undershystand and remember Also our friends at the Entomological Socishyety had the accepted common name as Forest Day mosquito but to their credit they changed it to what every one calls it the Asian tiger mosquito

So despite their scientific bent scientists can be influenced to change their minds If common names and abbreviations too didnt have a purpose that is to help us to communicate then we would all be saying too many long boring and confusing sentences Consider the following For years Cornelius Magillicutty sprayed his back yard with dichloro-diphenylshytrichloro-ethane for Aedes abopictus and then years later with Norma Jean Baker at his side watched the thin-shelled eggs of Haliaeetus leucocephalus drop out of 500-year old Taxodium distichum that he loved so much Yawn

Its that kind of phraseology that keeps people including some scishyentists from reading the scientific literature When trying to commushynicate any word or phrase that your listener doesnt know or understand tends to confuse them annoy them or make them feel inferior and that often makes them stop listening Communicating with the public has become a major mosquito control activity in recent years When com-

municating with the public scientific terms and jargon are neither desirshyable or necessary Mosquito control activities can be explained in very simple terms We could use the term Bacillus thuringiensis var israeensis instead of BTl but how many of us do Telling the average person SLE is an arbovirus doesnt give them any more information than telling them its a virus

And whats with this italics stuff for scientific names Ask people (inshycluding you perhaps) why we italishycize scientific names and most will probably guess that its to emphashysis the term Wrong If you care why look it up Lets forget it from now on OK If you cant write Culex quinquefasciatus without italics then consider my alternative-comshymon names that dont need to be italicized

The Entomological Society of America has a committee that conshysiders and usually rejects proshyposed official common names for insects There are only 14 mosshyquitoes on that list and I dare say most of us dont use most of them The problem with this list is that it was developed by scientists and everyone knows that all scientists are mad not just those in the movshyies Scientists want to do things in a scientific manner-logical meshythodical and precise Just because the entomological journals will only let you use accepted common names in their pages doesnt mean we cant use other common names in presentations and io print and we should

Fall1997 23

What we need is a list of comshymon names that the average mosshyquito control practitioner uses No one that anyone takes seriously will say they found some Culex pipiens quinquefasciatus (note no italics) in a polluted pond Most will say quinks Sure we can capitalize Quinks if it makes you feel better it does me So why are we afraid to write Quinks in our reports or say Quinks in formal talks Most people probably dont say quinks (see I dont insist on capitalization) because they think it makes them sound unprofessional Quinks is a distinctive short easy to rememshyber and fun to say name it has a beat that you can dance to and I give it a 99 Does anyone you know call quinks the southern house mosquito the accepted common name How about northern house mosquito for pipiens

Taenies or taenys or whatshyever spelling you want to use is easily recognized by east and south coast mosquito people as the comshymon name for Aedes taeniorhynchus one of the saltmarsh mosquitoes Again its a distinctive short easy to rememshyber and fun name It also describes the size of the species somewhat small or teeny-a bonus And who doesnt use Tox as the common name for our other spelling bee example

We dont hesitate to use comshymon names for a group of mosquishytoes that breed in a particular habishytat In addition to saltmarsh mosshyquitoes we refer to floodwater mosquitoes (which incidently also describes many saltmarsh mosquishytoes) tree hole mosquitoes dirty water mosquitoes grey water mosshyquitoes freshwater mosquitoes container-breeding mosquitoes pasture mosquitoes rock hole mosshyquitoes crab hole mosquitoes and on and on These habitat names are not mutually exclusive For exshyample pasture mosquitoes are also floodwater mosquitoes and fresh-

24 Fall1997

water mosquitoes By the way the translation of floodwater mosquito according to the Entomological Soshyciety is Aedes sticticus What Habitat names are also convenient for discussions among people from different geographic areas For example nature tends to give the same qualities to mosquitoes that breed in tree holes regardless of whether they are tree holes in Calishyfornia Virginia Queensland or Borneo From an operational mosshyquito control standpoint knowing the habitat of the mosquito can be more informative than knowing its scientific name

So lets consider some common names of species that we might use One common pest and potenshytial vector species that needs a common name is Coquillettidia perturbans (I think Ive weaned myself from italics) the aggressive biter whose larvae attach to the roots of aquatic plants particularly cattails (I could have said Typha species) Cattail mosquito is a natural even though larvae may attach to a variety of plants Another name could be the salt and pepshyper mosquito or another name taken from its scientific name could be the perturbing mosquito

How about the Anopheles The accepted common name for Anopheles quadrimaculatus is the common malaria mosquito This may have been accurate when malaria was a problem in this counshytry but now neither malaria nor this mosquito is common in this counshytry Im sure most of our hypothetishycal naming committee made up of operational mosquito controllers would call them quads

We have already dealt with Quinks Another obvious common name for another Culex Cx salinarius is sally or sallys or sallies Culex restuans is a little more tricky but how about rusty Rusty is suggestive of the color of the mosquito and it is similar to

resty a name that just doesnt sound right to me

Aedes vexans a common floodshywater mosquito in much of the US needs a common name The acshycepted common name vexans mosquito would be OK if most people know what vexing means And if they do why not call it the vexing mosquito Calling Aedes aegypti in the US by its accepted name the yellowfever mosquito is misleading Yellow fever has been absent from the US since right after the turn of the century Aegypti or gyps is often used by field and lab workers so why not adopt those terms

I could go on and on but Im more interested in what you think If you will send me your common names (keep it clean please) for any species you are familiar with Ill be happy to compile them and report back in a future article in Wing Beats (Theres that italics again different reason) If they appear in Wing Beats maybe just maybe we can call them official common names You can fax me at 561-778-7204 or E-mail me at cdmognvifas ufledu By the way you can address the message to Charlie Chas or Char The only person I insist call me doctor is my ex-wife and I would rather she didnt call me at all

-C_h~ulie M~rtis middot is an Assoshy _ciate middotPi~fesso( at the Unishy versity ~f floridas Medical Eiitomology Laboratory middot hi middot middot

Verq Beach Fiorida~

continued from page 20

providing support for report prepashyration and other documents and perform secretarial functions

Funding

In order to advance the objecshytives of GCDPP a stable source of funding will be necessary WHO CTD (WHO-Division of Control of Tropical Diseases) will establish and administer a trust fund which will be designated as GCDPP-Trust Fund which will be administered according to the WHO financial rules regulations and practices

The trust fund will be used to convene meetings production and dissemination of documents exshychange and dissemination of inforshymation on the need for public health pesticides and equipment and for activities which will promote the development and use of alternative safe compounds or application equipment

1James of organizations institushytions foundations manufacturers and individuals participating and contributing to this program will be listed Each participant will be enshycouraged to make annual contribushytions to the trust fund

Further Information

For further information on WHOshyPES or GCDPP contact Dr Zaim Morteza WHO-PES CTD World Health Organ ization 1211 Geneva 27 Switzerland E-mail zaimmwhoch

Nlir smiddotMulla is a Profes-sor with the Deparfrilent of ~nt-oshy_mologyUniverslty at califor middot -nia Riversidemiddot CA92521 middot _ middot middot

-

middotMulla= Receives -middot

Recognition Awar(j _

Mir S Mulla Professor of Entoshymology Department of Entomolshyogy University of California Rivershyside CA was presented the Scishyence Society of Thailand~ Meritoshyrious Recognition Award by the Thailand Minister of Science and Technology last October

Mulla an authority on insects of medical and public health imporshytance was cited for his efforts and leadership in organizing the First International Symposium on Biopesticides convened at Naresuan University in Thailand This symposium attended by some 300 participants from 20 countries covered biodiversity safety toxicshyity efficacy and proper use of biopesticides based on natural products and pathogenic organshyisms The proceedings of this first symposium amounting to 300 pages will be published soon

Mulla informs us that the 2nd International Symposium on Biopesticides will be held in late October 1998 on Langkawi Island off the coast of Malaysia Anyone interested in receiving further inforshymation regarding the proceedings or the second symposium should contact Dr Mulla at tel (909) 787-5818 fax (909) 787-4210 and eshymail mulla mailucredu

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Notice Psotophora middotgtcyaneseens collect~d middotin Aiachua County FL

- ~

and 9 pupae of this species were collected by the author from a sunshylit small (ca 2 m diam and 20 em deep) grass-lined pool filled with rainwater at Gainesville Florida

a common identification number with their 41h instar larval and pupal exuviae On subsequent visits to the site no additional Ps cyanescens were collected

Psorophora cyanescens (Coquillett) previously has been reported in Florida from the followshying counties Bay Duval Escambia Gadsden Hillsborough Jackson Leon Okaloosa Suwannee and Union (HT Evans Florida Mosquito Control Handbook 1994) On 26 May 1997 one 4h instar larva

Also collected from the pool were numerous larvae and pupae of Psorophora columbiae (Dyar and Knab) Aedes vexans (Meigen) and Culex salinarius Coquillett and 17 4h instar larvae of Psorophora ciliata (Fabricus) All immatures were individually reared and the resulting adults were linked by

John -Fmiddotmiddoteeinert is with Jlie CeMte(for Medicental middotAgricultural

aridVet$rih~rY Entomology u s ~ Department oFAgricul~umiddotre Agri-

26

culture~ 8e$earch Service 1600 1700 SW 23dDrive Gainesvillemiddotmiddot

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REGISTRATION FOR WORLD DIRECTORY OF ARTHROPOD VECTOR RESEARCH AND CONTROL SPECIALISTS

In order to update the Directory we would appreciate your completing this form Please type or print and return it to the address listed below We would also appreciate your copying this form and supplyshying it to any colleagues who are working in this field Your cooperation will allow greater communication and efficiency within our profession

Name (Last or family name) (First or given name)

Title of present position ----------- Nationality

Present Address _______________________________ _

Telephone (Work) _____ (Home) _____ Fax ______ E-mail _______ _

DEGREES DATE UNIVERSITY

Languages understood Specialty ------------

Professional society affiliations AMCA __ SOVE __ ESA __ ASTMH __ RSTMH __ ESC __

Other ______________________ _

Please return by Air Mail to Dr Eugene Gerberg Chairman AMCA International Affairs Committee 5819 NW 57th Way Gainesville FL 32653-3257 USA

Fall1997

Date completed

Were Sales VW ampR s professional educated experienced staff knows and understands the vector control industry You can count on us to be there when you need us

Were Service VW ampR has over 70 locations across the United States and Mexico that offer convenient local vector control products Count on our professional and knowledgeable industry experts to assist you in finding solutions to your problems

Were Support bull VWampRs web site is designed to provide you with the latest

industry information Visit PestWeb for labels slides MSDSs industry news and weather reports

bull ChemCare provides you with chemical waste management solutions liSTW

bull Our licensed instructors are teaching t I~middot middotmiddot 1~ middot bull seminars in classrooms across the nation bull~middot-w~ You can count on us to he p you stay current

Were Serving the Vector Control Industry bull Btis granules liquid

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bull Larvicide oils bull UL V foggers bull Sprayers bull Fyfanon bull Natural Pyrethrin

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Call Your Local VWampR Office At

1-800-888-4VWR Van Waters amp Roge~s Inc

We re More Than Just A Distributor

The Best Products including ABATE As American

Cyanamid exits the mosquito control market we are honored to be the exclusive formulashytor and distributor of ABATE products

to only a middotWarning label The new amendshyed labels also allow 1 2 and 5 Skeeter ABATE to be used as a pre-hatch in breeding and floodplain areas And now all Skeeter

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ABATE ABATE products are regisshytered to be applied using aerial equipment as well making this reliable prodshy

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uct as versatile as it is effective

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The Finest Equipment Professionals count on the raw power of the 18 hp

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1(~~ PO Box 60005 Fort Myers FL 33906

ADDRESS CORRECTION REQUESTED

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1 bullbull )1 bullbullbull 1111 11 bullbullbullbull 11 1 bullbull 111 bullbullbull 111 bullbullbull 111 bullbullbull 11 bullbullbullbull 11 1 R1chard Da r s 1e Florida Medic a l Entomology Laborator y 200 9th St SE vera Beac h FL 32962-4657

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PAID PERMIT 198 IT MYERS FL

Page 10: Wing Beats Volume 8 Number 3wingbeats.floridamosquito.org/Wingbeats/pdfs/Vol8No3.pdf · 2014. 4. 11. · Stan Cope, Norfolk, VA Betsy Field, Vero Beach, FL John Gamble, New Smyrna

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Position middot Announcement

MOSQUITO CONTROL MANAGER

HERNANDO COUNTY FL

Responsible for the planning supervision and direct execution of environmental programs operated by the County

REQUIREMENTS Graduation from a 4-year college or university with a degree in entomology or the basic sciences Five years experishyence in the operation of mosquito control or environmental programs Certification in the category of Pubshylic Health Pest Control in conformity with Public Law 92-515 regulating the application of restricted use pesticides in the State of Florida State Certification in the category of Right-of-Way Pest Control State Certification in the category of Aquatic Weed Control Must posshysess and maintain a valid Florida drivers license and be insurable by Countys current insurance carrier

Open until filled Pay Grade 21 0 Salary $321 09annually To receive an application or send a resume write to Hernando County Human Resourses 20 North Main Street Room 260 Brooksville FL 34601 or phone (352)754-4120 EOEAAMF0V and Drug-Free Workplace

12 Fa111997

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Meetings of Interest

FMCA Annual Fall Meeting November 16-20 1997

1997 Annual Fall Meeting of the Florida Mosquito Control Associashytion Radison Ponce de Leon Reshysort in St Augustine FL

For more information contact Shelly Redovan PO Box 60837 Fort Myers FL 33906-0837 Tel (941) 694-2174 Fax (941) 694-6959

Entomological Society of America Annual Meeting December 13-18 1997 Nashville TN

Contact (301) 731-4535 or e-mail meetentosocorg

Info is available on the web at httpwwwentosocorg

MVCAC Annual Conference January 25-28 1998

661h Annual Mosquito and Vecshytor Control Association of Califorshynia Conference Tenaya Lodge Fish Camp California

Contact Don Eliason at Tel (916) 685-2600 Fax (916) 685-1768 e-mail movcacaolcom

WCMVCA Annual Meeting February 19-201998

West Central Mosquito and Vecshytor Control Association meeting at the Grand Vista Hotel in Grand Junction CO

Contact Wayne Kramer at (402)471-0506 for more informashytion

AMCA Annual Meeting March 8-12 1998 John Ascuagas The Nuggett

(800)648-1177 in Sparks Nevada

Contact AMCA Central Office (318) 47 4-2723 for more informashytion

North American Conference on Pesticide Spray Drift Management March 29-April 1 1998 Holiday Inn by the Bay Portland Maine

For further information contact Jim Dill UMCE Pest Management Office 491 College Ave Orono ME 04473-1295 Tel (207) 581-3880 Fax (207) 581-3881

Visit their Web Site at httpwwwstatelleus

agriculturedrift1htm

continued from page 10 All Im suggesting is that we have

put up with extremists and village idiots long enough and wed better settle back into down-to-earth realshyistic work in the fields of public health public safety and governshyment in general Weve allowed the inmates to run the asylum long enough Now its time for a return to normal behavior normal actions and sensible science

Daffy ideas and ideology notshywithstanding if you play around with nature it will kill you -~

~charley Ree~e i$ ~ middot synCti middot -cated columnist with the _ Orla~dQ _Sentinel lie _can ~e reached __ by email at middot -

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Charlie Reeses August 14th colshyumn proclaims that the preservashytion of wetlands and the reduction of pesticide spraying near these areas will in the near futu re lead to many cases of malaria and other diseases He states that this is environmental extremism and not realistic

Unfortuntely his sensible scishyence lacks the support of actual facts For instance the 1 200 cases of malaria per year in the United States for the past six years are almost all imported cases conshytracted in other countries where conditions are more conducive to transmission Only a handful of malaria cases transmitted within the states have been recorded within the last 40 years Although the draining of swamps and spraying of pesticides did play a role in the reduction of malaria in Florida they were only a portion of the solution Window and door screenings coupled with the spread of air conshyditioning throughout Florida played a large role in keeping mosquitoes out of houses where pesticides couldnt reach

Furthermore the mosquitoes that transmit yellow fever and dengue do not breed in swamps but in small containers (such as flower pots and rain gutters) scattered thoughout every neighborhood Pesticides are often ineffectual against these urban mosquitoes So window screening again played a major role in reducing these two diseases in Florida

Although wetlands are the known breeding grounds for many mosquitoes manipulated wetlands such as rice fields in Texas orange groves cattle pastures and cane fields in Florida actually pose a much larger threat to people in

terms of producing large numbers of disease vectors The alleged value of swamps that Mr Reese mentions lies in the functions of rain and stormwater collection and disshypersal Without such wetlands rain must go somewhere and many low-lying agricultural areas such as rice fields and orange groves turn into mosquito breeding grounds

Draining swamps and spraying pesticides are not a magic bullet for mosquito and disease control Reliance on these methods alone has taught mosquito control and health officials harsh lessons Mosshyquitoes and the diseases they spread have complicated life cycles which can intertwine with our own socioeconomic cycles

Mr Reese should contact the village idiots and extremist who work daily in mosqito control to learn the facts The difficult task of controlling mosquitoes in Florida is an ongoing challenge We have learned from others that have failed to utilize multiple control methods and relied too heavily upon one method

Pesticide resistance of malarial mosquitoes presents a real danger to public health For example the over-use of DDT for malaria conshytrol as well as crop protection in Sri Lanka failed to prevent the disease and resulted in over 400000 cases of malaria in 1975 Cotton farmers in El Salvador and Guatemala have been drenching their fields with every known insecticide These actions have produced malaria mosquitoes resistant to all chemishycals Mr Reese is right on one count If you fool around with nashyture it can kill you

middot- -zach --Prumiddotsa_~ ~Enviroomental middot As$9ciate and Fred Harderi -CQri$Jitan_t_ are with middott_ll_e Reedy middotmiddot Creek lniproverrientDistrict in -

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Fal11997 13

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Most modern mosquito control operations include larviciding as an integral part of their pest manageshyment practices Mosquito larvicides are available in a wide range of types and formulations Dry formushylations include briquets granules and pellets

Formulations usually are applied directly out of the container genershyally with no need for mixing Some sand formulations may be made on site by following instructions proshyvided on the labels There is usushyally a range of rates for each forshymulation to cover different habitats and water quality depth movement and organic content plus other facshytors discussed on product labels

Selecting the formulation and application rate that gives you the best coverage for your larval habishytats requires some thought Dryshyformulated larvicides may be apshyplied by hand with ground equipshyment and by air In this article we focus on ground applications and calibration as we have in the previshyous two articles in this series

Calibration is an encompassing principal that includes

1 determining what insecticide formulation to use

2 the rate of toxicant per acre to apply

3 the total spray volume needed to use to get good coverage

4 determining (or setting) the flow through the nozzle

5 determining the effective swath width and if appropriate the walking pace of application

14 Fall1997

After these parameters are set the applicators should practice by spraying a measured area against the clock Through practice the applicator will develop visual cues and hand-eye coordination which leads to standardizing hisher covshyerage per minute These factors apply to granular blowers horn seeders and other dry formula apshyplication tools including aerial spreaders

Choosing The Formulation

The three active ingredients most commonly used in dry larvishycide formulations are temephos sshymethoprene and delta-endotoxin (Bti) All three may be mixed with plaster (eg Altosid Briquetsreg Altosid XR Briquetsreg Altosid Pelshyletsreg and 5 Skeeter Abatereg) with food substances (Bactimos Pelshyletsreg) or with cork (Bactimos Brishyquetsreg) They also may be attached to ground-up corncob (eg Vectobac Greg and Vectobac CGreg) paper pulp waste material (eg Abadac which is liquid Abate plus Biodacreg Aitodac which is Altosid Liquid Larvicidereg plus Biodac) or sand (eg 1 Skeeter Abatereg LarvXSGreg and Aitosand which is Altosid Liquid Larvicide plus sand) Briquets generally are designed for use at rates ranging from 1 per 200 square feet (218 per acre) to 1 per 25 square feet (1742 per acre) A typical application rate is 1 per 1 00 square feet (436 per acre) in many situations Some granular products may be applied at up to 20 lbs per

acre but applicators typically used 5-10 lbs per acre

Briquets and pellets slowly reshylease toxicants to provide sustained control for one or more months The Bti toxicants are stomach poisons which must be placed in that part of the water column where the tarshyget larvae feed S-methoprene and temephos are contact poisons which mix with the entire water column Bactimos Briquets which float are primarily a mixture of Bti and cork and are often staked in place to prevent their being moved by wind waves and animals Altosid Briquets Altosid XR Brishyquets Altosid Pellets and Skeeter Abate Pelletsreg are made with plasshyter and sink to the bottom Some mosquito control agencies place briquets in fine wire mesh baskets and suspend them in storm drains just above the bottom so they are not swept away or buried Sand formulations also sink but a new Bti formulation LarvXsg is coated with vermiculite which reshyleases and carries the Bti back to the surface from which it is reshyleased Some Bti corncob granshyules in each bag will float while othshyers may sink This is also true for formulations using Biodac as a carshyrier

Briquets are most commonly dispensed by hand but Clarke Equipment Companys Arrow Gunreg is sometimes used to broadcast Altosid Briquets but not Bactimos Briquets The Arrow Gun uses compressed air captured from a non-thermal ULV aerosol generashytor to propel briquets down its barshyrel It may be used for lobbing one

or a few briquets into isolated small pools where placement is not a critishycal issue both in terms of cost and eHiciency Applicators may also use a slingshot The Arrow Gun works very well for applying pellet ground corn cob and other granushylar carrier formulations in large amounts In order for the equipment to be used properly as with any application equipment it must first be calibrated

Figure 1 shows release rates for Altosid Briquets Altosid XR Brishyquets and Altosid Pellets These curves are adapted from an article by Dr Doug Ross et a called Methoprene concentrations in freshwater microcosms treated with sustained-release Altosid formulashytions (Mosquito News 1994 Vol 1 0(2 pt 1 pp 202-21 0 They are indirect measures of release rates derived by measuring the concenshytration of active ingredients in the water Notice that the AI is not reshyleased uniformly throughout the active life of the formulations Conshysider this when you are larviciding We suspect that most solid larvishycides have characteristic release rate curves but we are not aware of any published descriptions If we could tap into the EPAs confidenshytial data files we might be able to find out more about this topic

In a large rectangular area usshying a 1 briquet1 00 sq ft applicashytion rate if briquets are placed in the recommended 1 0 foot intervals in even rows the maximum (diagoshynal) distance between two adjacent briquets is a little over 14 feet Imagshyine a square with a briquet in each corner and mosquito larvae in the center a little over 7 ft from each briquet To decrease the maximum diagonal distance between briquets to 1 0 feet while still placing briquets every 10 feet in rows stagger the rows so the briquets in the second row are between the briquets in the first row Materials science tells us this is the most efficient spacing scheme We recommend practic-

ing briquet placement in a mowed yard prior to actual field work This will allow you to get your spacing right Monroe County (Florida) Mosquito Control District field pershysonnel typically hand-apply over 20000 Altosid Briquets every year by walking their breeding sites with a 2 gallon pail full of product

STAGGERED X X X

X X X

X X X

ABREAST

X X X

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Another problematic situation occurs when treating a narrow ditch If a ditch averages 8 feet wide you would apply a briquet every 125 linear feet to get the 1 briquet per 1 00 sq feet If the ditch averaged 2 feet wide you would apply one briquet for every 50 linshyear feet In the case of a narrow ditch and in the absence of any external mixing forces such as wind or water flow the concentrashytion will be higher than expected adjacent to the briquet because the toxicants cannot disperse equal distances in all directions In addition the concentration of AI at the center point between adjacent briquets may be below the lethal dose Exposure of mosquito larvae to sublethal doses may result in resistance to the AI If the water is flowing the problem is solved but you may get accelerated briquet erosion Altosid Briquet labels provide instructions for treatshyments in moving water

East Volusia Mosquito Control District (Florida) developed a method to apply a whole seasons worth of Altosid (30-day) Briquets

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DAYS AFTER APPLICATION

Figure 1

Release rates for Altosid Briquets altosid XR Briquits and Altosid Pellets

Fall1997 15

at one time They cap a 6-8 inch section of 1-inch ID PVC pipe atshytach this (cap-side up) to an alumishynum stake (packing tape works great) and drill a 38 inch hole through it at the other end Brishyquets are inserted into the cylinder sometimes with color coded poker chips as spacers and a wire is run through the hole (or the stake is bent inward) to prevent the briquets from falling out prematurely The stake is driven into the bottom at the breeding site As the breeding site is flooded the bottom briquet erodes away releasing AI Trapped air prevents water from reaching the other briquets Another briquet falls down to take its place when it is about gone A field inspector can count poker chips to see how many Altosid Briquets have been used up

When bottom contours are highly irregular and the water depth is shallow and decreasing you may

not want to use briquet formulations at all Consider whether or not the briquet will ever be isolated from any part of the intended treatment area during its active life If so larshyvae may escape control efforts The amount of carrier material used can dictate the quality of control you achieve and is a very important consideration Unless we formulate our own pesticides we must work with a fixed amount of toxicant per pound as determined b~middot the manushyfacturer for an average situation Wouldnt it be nice to have a series of dry formulations based on the same AI that best fit different situashytions

Consider Figure 2 for a moment It shows the approximate average number of particles per square yard for four different carriers This graph is the result of investigations by students attending the weekshylong Florida Mosquito Control Asshysociation Dodd Short Courses on

Larviciding during 1996 and 1997 plus the work of Pasco CMCDs John Schaediger who washed and counted thousands of grains of sand Notice that 6 pounds of Biodac1200 contain about the same number of particles as 1 0 lbs of 1 014 grit corn cob If you have determined that 1 0 lbs of Vectobac CG (which uses 1 014 grit corn cob) is the correct application rate for you then perhaps 6 pounds of Biodac 1200 formulated with the same amount of Bti will do the same job and save you 40 in weight At these rates they both contain approximately the same number of carrier particles per pound The weight difference could increase the economics of aerial application where the lower weight translates into more acres per payshyload per flight

We apply 75 lbs of granulated 1 014 grit corncob per acre as our base rate This includes both in-

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Fall1997

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house mixes of blank granules with active ingredients and commercially finished products The 75 lbs is not just a figure that has been pulled out of the sky but one that many trials and observations have shown to be necessary to get good coverage with a variety of bottom contours and vegetation types You may need a different base rate When field personnel are conshyfronted with heavy detritus or vegshyetation aggregated larvae or a preponderance of late in star larvae they can then increase their applishycation by slowing down their pace or narrowing the swath to raise the dosage of pesticide (remembering to stay within the maximum labeled rate)

Whatever the formulation the proper application is critical to the efficiency and effectiveness of your program Larvicide labels comshymonly include only very general guidelines for application techshyniques or equipment selection This latitude allows applicators and technical staffs to choose a system that works best for their circumshystances A granular label notes the material should be applied unishyformly in conventional aerial and ground equipment

Equipment Calibration

Equipment calibrations are imshyportant for the effectiveness of your operation Consistency is born out of practice on top of more practice Failures of larvicides are often atshytributed to missed areas caused by poor applications Calibrating flows on dry application equipment is done either by timing how long it takes for a known amount to pass through the unit or by collecting all the material blown from the nozzle for a fixed period of time and then weighing it Either should be done by two people one that handles the machine and one that does the timshying The collection method retains

the material for subsequent tests but may restrict the flow on certain machines Machines with powershyful air blasts can only be checked by timing the discharge of a known quantity

Knowledge of the flow rate and of factors affecting it are critical to calibration The most common powshyered ground equipment used for dry applications is the gasolineshyengined backpack mistblower duster The units are capable of providing even coverage good throw and are simple to use They typically broadcast granules in a 40-60 ft swath width with the operator walking at 1-3 miles per hour This translates to 5-20 acres per hour of spray time Several things can be done to change the flow rate with the nozzle orifice or disc as the primary determinate Changing the pressure will also change the flow but to a much lesser degree and it has other side effects Some power dusters have movable grates that regulate flow over the normal opshyerating range Some brands have a series of replaceable orifice discs that allow discharge rate changes in small steps Blower speed also affects the throw but that should have marginal effect on the disshycharge rate

Other ground equipment that may be used include crank slinger seeders horn seeders and modishyfied ULV equipment (eg Arrow Guns mentioned above) The flow of spinning disc spreaders or othshyers with a mechanical agitator may be somewhat affected by the opshyerational speed Horn seeders which have about a 20 ft swath width when applying Bti granules are often used by our field personshynel to treat small sites They have replaced the Dipper and Bucket method where an applicator fills a dipper from a bucket of granules and then carefully and evenly broadcasts them

An Example

Assume you have determined that you can comfortably apply B ti corncob granules in 50ft swaths at 2 mph (121 acreshour) using a duster and you want to apply them at 25 to 10 lbsacre To get proper coverage in typical vegetation you will use 5 lbsacre and when conshyfronted with adverse conditions you may double or in this case with a maximum label rate of 20 lbs acre quadruple the application to get the proper dosage of pesticide to the insect

Fill the hopper with granules making sure not to get any pieces of paper or other debris mixed into the product If the unit is equipped with an air agitation system make sure that it is operational Start the engine and make sure that the granules are free flowing through the nozzle If the unit is equipped with an adjustable gate style regushylator center it for an initial trial Close the flow control For collectshying granules you need a nylon stocking and a scale that measures to ounces or grams Place the stocking over the discharge tube and secure it with a rubber band The stocking should be supported so it wont pinch the air flow off Run the blower up to speed and then open the flow valve as you start timing Have the operator open the valve as the stop watch is started

Because of the very low flows (small quantities) of granules needed take a sample over a given period in the 3-5 minute range Shut the flow off as the timer notes the end of the period Pull the colshylection into the bottom of the stockshying and remove it from the nozzle Place another stocking on the duster and collect a second sample and then a third sample Collect at least three samples weigh each and average the results Be sure to subtract the weight of the stock-

Fall1997 17

ing before calculating the average If one sample volume is much higher or lower than the other two samples then replace the odd sample with a new one Assume you collected three 5-minute samples that weigh 61 64 and 59 oz each The average is 61 3 oz5 min or 1227 ozmin

Practice

Swath tests are best done inishytially using a paved surface such as a parking lot for a practice spray plot because the granules are easshyily seen Blank granules for pracshytice and for your own formulating may be purchased from The Andersons (800-537-3370) and other sources Get 1014 grit if you use Vectobac CG or an equivalent and 58 grit if you use Vectobac G or an equivalent Fill the hopper with a weighed quantity of granules and walk over the plot trying to cover the entire area with an even dosage To determine how much was applied empty the hopper and weigh the material remaining Afshyter a good distribution has been

mast~red move onto a measured field where the terrain is more diffishycult and continue practicing Proshygressively move into more difficult areas as your skill level increases You can get to the point where you know what 5 lbsacre looks like in any habitat and then when you apshyply the real stuff you will know you have done so properly

Assume your practice spray plot is 18 of an acre Therefore to get the proper dose you want to apply 18 of 5 lbs (0625 lbs or 10 oz) to the plot You earlier calculated that your duster is putting out approxishymately 1225 oz per min The calshyculated time to put out the 1 0 oz required to treat the test plot is 082 minutes or49 seconds [determined by dividing 10 ounces by 1225] You also determined that you can treat 121 acreshour at a 2 mph walking speed At that speed you can treat about 16 of an acre in 49 seconds You have three choices to adequately cover your 18 acre practice plot 1) You can walk at your normal speed and apply at a rate slightly higher than 5 lbsacre 2) you can walk a little slower and

BVA

apply at the normal rate or 3) you can decrease the flow rate a bit to achieve the target rate at your norshymal application speed The choice is yours

If you have any questions feel free to contact the authors at Pasco County Mosquito Control District 2308 Marathon Road Odessa Fl 33556 Phone 813-376-4568 Fax 813-376-470 Email pcmcdgtenet

~

Doug middot wassmer _ _Jim middot _ Robinson middotand Jack-Frerich middotmiddot middot are-middot vyith the pascomiddotmiddotc_qun~y middot Mosquito Control bistr_ict middot

middot Odessa middotFiorida middotmiddot-_ middot middot middot _ middot_

MOSQUITO CONTROL PRODUCTS BVA 2 Larvicide Oil

EPA70589 Quick Kill Larvicide

Short-Term

BVA 13

EPA55206-2 The Clear Choice For ULV Diluents

BVA Maximum Flushing Oil Cleans Nozzles and Tanks

Dissolves Insecticide Residues and Sludge Deposits

BVA OILS 800-231-3376 FAX 248-348-2684

18 Fall1997

BVA Chrysalin

EPA 045987-6-55206 Botanical Long Life

Larvicide

BVA Fog OillOO Naphthenic Oil

Used for Certain Fogging Operations

E-MAIL BVAOILSAOLCOM

VectoBacreg and Bactimosreg give you the most effective mosquito larvae controlshy

whichever formulation you prefer

Now with Abbott you can choose either VectoBacreg or Bactimosreg for long-lasting and economicalcontrol

of mosquito larvae Both contain the naturally occurring active ingredient Bacillus thuringiensis israeiensis (Bti) -highly effective yet perfect for environmentally sensitive

application sites They offer the widest range of formulations available too Ask your Abbott representative about the

benefits of VectoBac and Bactimos today

VectoBacreg Bactimosreg

a Abbott l-aboratories - Quality Health Care Worldwide Public Health Products - North Chicago IL 60064 - 800-323-9597

In order to control or eradicate vector-borne disease the world Health Organization launched a substantial program of research on the screening evaluation and deshyvelopment of pesticides for the conshytrol of disease vectors and human pests in the early 1960s This proshygram of research and development continued into the 1970s Various collaboration centers and WHO regional research laboratories were involved in this multiphasic evaluashytion and research program This program was later designated as WHO-PES (WHO Pesticides Evaluation Scheme) which inshycluded laboratory screening of new pesticides and their formulations and finally small-scale and largeshyscale village field trials where effishycacy safety and feasibility of applishycation were studied Additionally whenever possible impact on the level of endemic diseases was also assessed The 41

h phase of this scheme addressed specification of pesticides and their formulations to be used in vector control

The WHO-PES program evenshytually came to a halt in the eighties and with restructuring of the vector Biology and Control Division in WHO this program came to a grinding halt It soon became apshyparent that member countries carshyrying on substantial vector control programs especially mosquito conshytrol operations soon reached the stage when appropriate tools and strategies for use in operational programs became quite scarce Member countries put forward deshymands for the development of more effective and safer chemical and

20 Fa111997

biological control measures To reshyspond to this global demand the Division of Control of Tropical Disshyeases (CTD) at WHO reinvigorated the WHO-PES Program by holding an informal consultation on the Evaluation and Testing of Insectishycides on October 1996 where I was asked to serve as the Chairperson of the consultation Copies of the report of this Consultation can be obtained from Dr Zaim Morteza whose address appears at the end of this article

As a result of the Informal Conshysultation and other discussions held at WHO regarding the future need for public health pesticides CTD recently (1996) launched the GCDPP program This is indeed a crucial program which requires colshylaboration among national and inshyternational agencies research inshystitutions industry and regulatory agencies The main objectives elshyements and scope of this program are briefly discussed below

The main objectives of the GCDPP program are

bull To facilitate the search for alternative pesticides including mishycrobial pesticides as well as applishycation methodologies

bull To advise on the relative priority of activities within the manshydate of GCDPP

bull To advise on issues related to the development and use of pesshyticides and application equipment within the context of WHOs global disease control strategies

bull To promote harmonization of activities related to pesticide deshyvelopment and safe use

bull To promote and encourage the highest quality of work through appropriate resource mobilization

bull GCDPP will serve as an advisory group to CTDWHOPES in matters of pesticide developshyment safe and proper use and apshyplication equipment

Membership and Meetings

A number of agencies organishyzations and manufacturers of pesshyticides and application equipment will become members of GCDPP as well as foundations and WHO Collaborating Centers Other groups and -organizations involved in manufacturing pest manageshyment and crop protection will also be invited Attempts will be made to maximize representation but at the same time ensure appropriate balance In addition to the above distinguished scientists and direcshytors of WHO Regional Offices may also be invited to attend the meetshyings of GCDPP

GCDPP will provide a forum for the exchange of technical informashytion and oversee the WHO-PES biennial plan and collaboration with other organizations and institutions GCDPP will meet every other year in Geneva Switzerland Informal consultation meetings on specific topics will be convened as the need arises CTD will be responsible for the organization of such meetings

continued on page 25

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How many of you know the names Norma Jean Baker Cornelius Magillicutty dichloroshydiphenyl-trichloro-ethane Haliaeetus leucocephalus and its distant relative Taxodium distichum How about Aedes albopictus Well if you are willing to bet $100 you know all six withshyout looking at the answers then you are either very bright very old well read or have too much time on your hands If you know only one I hope its the Asian tiger mosquito What if for the remaining five I gave you the hints of Some Like it Hot baseball legend insecticide whiteshyheaded bird and tree with knees The older ones amongst us and thats getting to be a higher percentshyage each year should recognize Marilyn Monroe and Connie Mack for the first two All of you should be ashamed of yourself if you dont recognized DDT The last two reshylated by name only are Bald Eagle and Bald Cypress If you got both of those you are probably psychic and also know what the point of this article is

And what is the point of this arshyticle the need for common names for mosquitoes Most of us know the birds plants and mammals by their common names Why then must we for the most part use scishyentific names for mosquitoes There are other names that would be more meaningful easier to spell and certainly easier to pronounce Ill bet my $100 right now that 50 of us couldnt spell Toxorhynchites or taeniorhynchus in a spelling bee Thank goodness Aedes abopictus had a catchy common name when

- bull bull -middot ~ bull middot- ~ bull ~ bull

it became established in the US in 1985 Never mind that the common name conjured up all sorts of wrong impressions Asian tiger mosquito was a lot easier for the public and press and I dare say most mosshyquito control practitioners to undershystand and remember Also our friends at the Entomological Socishyety had the accepted common name as Forest Day mosquito but to their credit they changed it to what every one calls it the Asian tiger mosquito

So despite their scientific bent scientists can be influenced to change their minds If common names and abbreviations too didnt have a purpose that is to help us to communicate then we would all be saying too many long boring and confusing sentences Consider the following For years Cornelius Magillicutty sprayed his back yard with dichloro-diphenylshytrichloro-ethane for Aedes abopictus and then years later with Norma Jean Baker at his side watched the thin-shelled eggs of Haliaeetus leucocephalus drop out of 500-year old Taxodium distichum that he loved so much Yawn

Its that kind of phraseology that keeps people including some scishyentists from reading the scientific literature When trying to commushynicate any word or phrase that your listener doesnt know or understand tends to confuse them annoy them or make them feel inferior and that often makes them stop listening Communicating with the public has become a major mosquito control activity in recent years When com-

municating with the public scientific terms and jargon are neither desirshyable or necessary Mosquito control activities can be explained in very simple terms We could use the term Bacillus thuringiensis var israeensis instead of BTl but how many of us do Telling the average person SLE is an arbovirus doesnt give them any more information than telling them its a virus

And whats with this italics stuff for scientific names Ask people (inshycluding you perhaps) why we italishycize scientific names and most will probably guess that its to emphashysis the term Wrong If you care why look it up Lets forget it from now on OK If you cant write Culex quinquefasciatus without italics then consider my alternative-comshymon names that dont need to be italicized

The Entomological Society of America has a committee that conshysiders and usually rejects proshyposed official common names for insects There are only 14 mosshyquitoes on that list and I dare say most of us dont use most of them The problem with this list is that it was developed by scientists and everyone knows that all scientists are mad not just those in the movshyies Scientists want to do things in a scientific manner-logical meshythodical and precise Just because the entomological journals will only let you use accepted common names in their pages doesnt mean we cant use other common names in presentations and io print and we should

Fall1997 23

What we need is a list of comshymon names that the average mosshyquito control practitioner uses No one that anyone takes seriously will say they found some Culex pipiens quinquefasciatus (note no italics) in a polluted pond Most will say quinks Sure we can capitalize Quinks if it makes you feel better it does me So why are we afraid to write Quinks in our reports or say Quinks in formal talks Most people probably dont say quinks (see I dont insist on capitalization) because they think it makes them sound unprofessional Quinks is a distinctive short easy to rememshyber and fun to say name it has a beat that you can dance to and I give it a 99 Does anyone you know call quinks the southern house mosquito the accepted common name How about northern house mosquito for pipiens

Taenies or taenys or whatshyever spelling you want to use is easily recognized by east and south coast mosquito people as the comshymon name for Aedes taeniorhynchus one of the saltmarsh mosquitoes Again its a distinctive short easy to rememshyber and fun name It also describes the size of the species somewhat small or teeny-a bonus And who doesnt use Tox as the common name for our other spelling bee example

We dont hesitate to use comshymon names for a group of mosquishytoes that breed in a particular habishytat In addition to saltmarsh mosshyquitoes we refer to floodwater mosquitoes (which incidently also describes many saltmarsh mosquishytoes) tree hole mosquitoes dirty water mosquitoes grey water mosshyquitoes freshwater mosquitoes container-breeding mosquitoes pasture mosquitoes rock hole mosshyquitoes crab hole mosquitoes and on and on These habitat names are not mutually exclusive For exshyample pasture mosquitoes are also floodwater mosquitoes and fresh-

24 Fall1997

water mosquitoes By the way the translation of floodwater mosquito according to the Entomological Soshyciety is Aedes sticticus What Habitat names are also convenient for discussions among people from different geographic areas For example nature tends to give the same qualities to mosquitoes that breed in tree holes regardless of whether they are tree holes in Calishyfornia Virginia Queensland or Borneo From an operational mosshyquito control standpoint knowing the habitat of the mosquito can be more informative than knowing its scientific name

So lets consider some common names of species that we might use One common pest and potenshytial vector species that needs a common name is Coquillettidia perturbans (I think Ive weaned myself from italics) the aggressive biter whose larvae attach to the roots of aquatic plants particularly cattails (I could have said Typha species) Cattail mosquito is a natural even though larvae may attach to a variety of plants Another name could be the salt and pepshyper mosquito or another name taken from its scientific name could be the perturbing mosquito

How about the Anopheles The accepted common name for Anopheles quadrimaculatus is the common malaria mosquito This may have been accurate when malaria was a problem in this counshytry but now neither malaria nor this mosquito is common in this counshytry Im sure most of our hypothetishycal naming committee made up of operational mosquito controllers would call them quads

We have already dealt with Quinks Another obvious common name for another Culex Cx salinarius is sally or sallys or sallies Culex restuans is a little more tricky but how about rusty Rusty is suggestive of the color of the mosquito and it is similar to

resty a name that just doesnt sound right to me

Aedes vexans a common floodshywater mosquito in much of the US needs a common name The acshycepted common name vexans mosquito would be OK if most people know what vexing means And if they do why not call it the vexing mosquito Calling Aedes aegypti in the US by its accepted name the yellowfever mosquito is misleading Yellow fever has been absent from the US since right after the turn of the century Aegypti or gyps is often used by field and lab workers so why not adopt those terms

I could go on and on but Im more interested in what you think If you will send me your common names (keep it clean please) for any species you are familiar with Ill be happy to compile them and report back in a future article in Wing Beats (Theres that italics again different reason) If they appear in Wing Beats maybe just maybe we can call them official common names You can fax me at 561-778-7204 or E-mail me at cdmognvifas ufledu By the way you can address the message to Charlie Chas or Char The only person I insist call me doctor is my ex-wife and I would rather she didnt call me at all

-C_h~ulie M~rtis middot is an Assoshy _ciate middotPi~fesso( at the Unishy versity ~f floridas Medical Eiitomology Laboratory middot hi middot middot

Verq Beach Fiorida~

continued from page 20

providing support for report prepashyration and other documents and perform secretarial functions

Funding

In order to advance the objecshytives of GCDPP a stable source of funding will be necessary WHO CTD (WHO-Division of Control of Tropical Diseases) will establish and administer a trust fund which will be designated as GCDPP-Trust Fund which will be administered according to the WHO financial rules regulations and practices

The trust fund will be used to convene meetings production and dissemination of documents exshychange and dissemination of inforshymation on the need for public health pesticides and equipment and for activities which will promote the development and use of alternative safe compounds or application equipment

1James of organizations institushytions foundations manufacturers and individuals participating and contributing to this program will be listed Each participant will be enshycouraged to make annual contribushytions to the trust fund

Further Information

For further information on WHOshyPES or GCDPP contact Dr Zaim Morteza WHO-PES CTD World Health Organ ization 1211 Geneva 27 Switzerland E-mail zaimmwhoch

Nlir smiddotMulla is a Profes-sor with the Deparfrilent of ~nt-oshy_mologyUniverslty at califor middot -nia Riversidemiddot CA92521 middot _ middot middot

-

middotMulla= Receives -middot

Recognition Awar(j _

Mir S Mulla Professor of Entoshymology Department of Entomolshyogy University of California Rivershyside CA was presented the Scishyence Society of Thailand~ Meritoshyrious Recognition Award by the Thailand Minister of Science and Technology last October

Mulla an authority on insects of medical and public health imporshytance was cited for his efforts and leadership in organizing the First International Symposium on Biopesticides convened at Naresuan University in Thailand This symposium attended by some 300 participants from 20 countries covered biodiversity safety toxicshyity efficacy and proper use of biopesticides based on natural products and pathogenic organshyisms The proceedings of this first symposium amounting to 300 pages will be published soon

Mulla informs us that the 2nd International Symposium on Biopesticides will be held in late October 1998 on Langkawi Island off the coast of Malaysia Anyone interested in receiving further inforshymation regarding the proceedings or the second symposium should contact Dr Mulla at tel (909) 787-5818 fax (909) 787-4210 and eshymail mulla mailucredu

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Notice Psotophora middotgtcyaneseens collect~d middotin Aiachua County FL

- ~

and 9 pupae of this species were collected by the author from a sunshylit small (ca 2 m diam and 20 em deep) grass-lined pool filled with rainwater at Gainesville Florida

a common identification number with their 41h instar larval and pupal exuviae On subsequent visits to the site no additional Ps cyanescens were collected

Psorophora cyanescens (Coquillett) previously has been reported in Florida from the followshying counties Bay Duval Escambia Gadsden Hillsborough Jackson Leon Okaloosa Suwannee and Union (HT Evans Florida Mosquito Control Handbook 1994) On 26 May 1997 one 4h instar larva

Also collected from the pool were numerous larvae and pupae of Psorophora columbiae (Dyar and Knab) Aedes vexans (Meigen) and Culex salinarius Coquillett and 17 4h instar larvae of Psorophora ciliata (Fabricus) All immatures were individually reared and the resulting adults were linked by

John -Fmiddotmiddoteeinert is with Jlie CeMte(for Medicental middotAgricultural

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REGISTRATION FOR WORLD DIRECTORY OF ARTHROPOD VECTOR RESEARCH AND CONTROL SPECIALISTS

In order to update the Directory we would appreciate your completing this form Please type or print and return it to the address listed below We would also appreciate your copying this form and supplyshying it to any colleagues who are working in this field Your cooperation will allow greater communication and efficiency within our profession

Name (Last or family name) (First or given name)

Title of present position ----------- Nationality

Present Address _______________________________ _

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Other ______________________ _

Please return by Air Mail to Dr Eugene Gerberg Chairman AMCA International Affairs Committee 5819 NW 57th Way Gainesville FL 32653-3257 USA

Fall1997

Date completed

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Page 11: Wing Beats Volume 8 Number 3wingbeats.floridamosquito.org/Wingbeats/pdfs/Vol8No3.pdf · 2014. 4. 11. · Stan Cope, Norfolk, VA Betsy Field, Vero Beach, FL John Gamble, New Smyrna

continued from page 10 All Im suggesting is that we have

put up with extremists and village idiots long enough and wed better settle back into down-to-earth realshyistic work in the fields of public health public safety and governshyment in general Weve allowed the inmates to run the asylum long enough Now its time for a return to normal behavior normal actions and sensible science

Daffy ideas and ideology notshywithstanding if you play around with nature it will kill you -~

~charley Ree~e i$ ~ middot synCti middot -cated columnist with the _ Orla~dQ _Sentinel lie _can ~e reached __ by email at middot -

middot - OSOre~se~aol_corn -- middot -~ middot copy 1997~ Klt-_G FEA_TURE middotsvNDICATE-INC-middot

- Editorsmiddot_Vote-Themiddot previ6middotus articent1~ - w$smiddot i ri ~~

eluded-to sHmul~te tllowght middotandmiddot hopefully elicit a -response from our readers middot- Wel i ltludn~i our -editorial procentessmiddot it was brought to my atten-middot tion -f~at a responsemiddot _to this-article had-alreadY be-E3ri submitted to __ the Orlando -sentineL - instead of pub Hshingmiddot this response lnih~ ~next i5sue of WingBeats 1-chose middotto ind~demiddot it akgtrig wi_th tflis articlemiddot -to _provfde another viewpoint wmiddotIJich -rnay h~lp to-correct a few oftlie inaccuracies

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-- Bothmiddot vlewpbi nts_~app~eEtr as stJbmitted- _without middot edjthig middot as shotild any y iewpoiot middotmiddot -lt middot -

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Charlie Reeses August 14th colshyumn proclaims that the preservashytion of wetlands and the reduction of pesticide spraying near these areas will in the near futu re lead to many cases of malaria and other diseases He states that this is environmental extremism and not realistic

Unfortuntely his sensible scishyence lacks the support of actual facts For instance the 1 200 cases of malaria per year in the United States for the past six years are almost all imported cases conshytracted in other countries where conditions are more conducive to transmission Only a handful of malaria cases transmitted within the states have been recorded within the last 40 years Although the draining of swamps and spraying of pesticides did play a role in the reduction of malaria in Florida they were only a portion of the solution Window and door screenings coupled with the spread of air conshyditioning throughout Florida played a large role in keeping mosquitoes out of houses where pesticides couldnt reach

Furthermore the mosquitoes that transmit yellow fever and dengue do not breed in swamps but in small containers (such as flower pots and rain gutters) scattered thoughout every neighborhood Pesticides are often ineffectual against these urban mosquitoes So window screening again played a major role in reducing these two diseases in Florida

Although wetlands are the known breeding grounds for many mosquitoes manipulated wetlands such as rice fields in Texas orange groves cattle pastures and cane fields in Florida actually pose a much larger threat to people in

terms of producing large numbers of disease vectors The alleged value of swamps that Mr Reese mentions lies in the functions of rain and stormwater collection and disshypersal Without such wetlands rain must go somewhere and many low-lying agricultural areas such as rice fields and orange groves turn into mosquito breeding grounds

Draining swamps and spraying pesticides are not a magic bullet for mosquito and disease control Reliance on these methods alone has taught mosquito control and health officials harsh lessons Mosshyquitoes and the diseases they spread have complicated life cycles which can intertwine with our own socioeconomic cycles

Mr Reese should contact the village idiots and extremist who work daily in mosqito control to learn the facts The difficult task of controlling mosquitoes in Florida is an ongoing challenge We have learned from others that have failed to utilize multiple control methods and relied too heavily upon one method

Pesticide resistance of malarial mosquitoes presents a real danger to public health For example the over-use of DDT for malaria conshytrol as well as crop protection in Sri Lanka failed to prevent the disease and resulted in over 400000 cases of malaria in 1975 Cotton farmers in El Salvador and Guatemala have been drenching their fields with every known insecticide These actions have produced malaria mosquitoes resistant to all chemishycals Mr Reese is right on one count If you fool around with nashyture it can kill you

middot- -zach --Prumiddotsa_~ ~Enviroomental middot As$9ciate and Fred Harderi -CQri$Jitan_t_ are with middott_ll_e Reedy middotmiddot Creek lniproverrientDistrict in -

middotmiddot Lake Buena vlst~ - FL middot- middot middot

Fal11997 13

9eat~te Applyitlg iarvietdes middot Forntulated middot With ~Dty Carriers middot middotmiddot middotmiddot middot bullmiddotmiddotmiddotbull middot

bullbull middotmiddot by J)~1f)~-~~~afladl~

Most modern mosquito control operations include larviciding as an integral part of their pest manageshyment practices Mosquito larvicides are available in a wide range of types and formulations Dry formushylations include briquets granules and pellets

Formulations usually are applied directly out of the container genershyally with no need for mixing Some sand formulations may be made on site by following instructions proshyvided on the labels There is usushyally a range of rates for each forshymulation to cover different habitats and water quality depth movement and organic content plus other facshytors discussed on product labels

Selecting the formulation and application rate that gives you the best coverage for your larval habishytats requires some thought Dryshyformulated larvicides may be apshyplied by hand with ground equipshyment and by air In this article we focus on ground applications and calibration as we have in the previshyous two articles in this series

Calibration is an encompassing principal that includes

1 determining what insecticide formulation to use

2 the rate of toxicant per acre to apply

3 the total spray volume needed to use to get good coverage

4 determining (or setting) the flow through the nozzle

5 determining the effective swath width and if appropriate the walking pace of application

14 Fall1997

After these parameters are set the applicators should practice by spraying a measured area against the clock Through practice the applicator will develop visual cues and hand-eye coordination which leads to standardizing hisher covshyerage per minute These factors apply to granular blowers horn seeders and other dry formula apshyplication tools including aerial spreaders

Choosing The Formulation

The three active ingredients most commonly used in dry larvishycide formulations are temephos sshymethoprene and delta-endotoxin (Bti) All three may be mixed with plaster (eg Altosid Briquetsreg Altosid XR Briquetsreg Altosid Pelshyletsreg and 5 Skeeter Abatereg) with food substances (Bactimos Pelshyletsreg) or with cork (Bactimos Brishyquetsreg) They also may be attached to ground-up corncob (eg Vectobac Greg and Vectobac CGreg) paper pulp waste material (eg Abadac which is liquid Abate plus Biodacreg Aitodac which is Altosid Liquid Larvicidereg plus Biodac) or sand (eg 1 Skeeter Abatereg LarvXSGreg and Aitosand which is Altosid Liquid Larvicide plus sand) Briquets generally are designed for use at rates ranging from 1 per 200 square feet (218 per acre) to 1 per 25 square feet (1742 per acre) A typical application rate is 1 per 1 00 square feet (436 per acre) in many situations Some granular products may be applied at up to 20 lbs per

acre but applicators typically used 5-10 lbs per acre

Briquets and pellets slowly reshylease toxicants to provide sustained control for one or more months The Bti toxicants are stomach poisons which must be placed in that part of the water column where the tarshyget larvae feed S-methoprene and temephos are contact poisons which mix with the entire water column Bactimos Briquets which float are primarily a mixture of Bti and cork and are often staked in place to prevent their being moved by wind waves and animals Altosid Briquets Altosid XR Brishyquets Altosid Pellets and Skeeter Abate Pelletsreg are made with plasshyter and sink to the bottom Some mosquito control agencies place briquets in fine wire mesh baskets and suspend them in storm drains just above the bottom so they are not swept away or buried Sand formulations also sink but a new Bti formulation LarvXsg is coated with vermiculite which reshyleases and carries the Bti back to the surface from which it is reshyleased Some Bti corncob granshyules in each bag will float while othshyers may sink This is also true for formulations using Biodac as a carshyrier

Briquets are most commonly dispensed by hand but Clarke Equipment Companys Arrow Gunreg is sometimes used to broadcast Altosid Briquets but not Bactimos Briquets The Arrow Gun uses compressed air captured from a non-thermal ULV aerosol generashytor to propel briquets down its barshyrel It may be used for lobbing one

or a few briquets into isolated small pools where placement is not a critishycal issue both in terms of cost and eHiciency Applicators may also use a slingshot The Arrow Gun works very well for applying pellet ground corn cob and other granushylar carrier formulations in large amounts In order for the equipment to be used properly as with any application equipment it must first be calibrated

Figure 1 shows release rates for Altosid Briquets Altosid XR Brishyquets and Altosid Pellets These curves are adapted from an article by Dr Doug Ross et a called Methoprene concentrations in freshwater microcosms treated with sustained-release Altosid formulashytions (Mosquito News 1994 Vol 1 0(2 pt 1 pp 202-21 0 They are indirect measures of release rates derived by measuring the concenshytration of active ingredients in the water Notice that the AI is not reshyleased uniformly throughout the active life of the formulations Conshysider this when you are larviciding We suspect that most solid larvishycides have characteristic release rate curves but we are not aware of any published descriptions If we could tap into the EPAs confidenshytial data files we might be able to find out more about this topic

In a large rectangular area usshying a 1 briquet1 00 sq ft applicashytion rate if briquets are placed in the recommended 1 0 foot intervals in even rows the maximum (diagoshynal) distance between two adjacent briquets is a little over 14 feet Imagshyine a square with a briquet in each corner and mosquito larvae in the center a little over 7 ft from each briquet To decrease the maximum diagonal distance between briquets to 1 0 feet while still placing briquets every 10 feet in rows stagger the rows so the briquets in the second row are between the briquets in the first row Materials science tells us this is the most efficient spacing scheme We recommend practic-

ing briquet placement in a mowed yard prior to actual field work This will allow you to get your spacing right Monroe County (Florida) Mosquito Control District field pershysonnel typically hand-apply over 20000 Altosid Briquets every year by walking their breeding sites with a 2 gallon pail full of product

STAGGERED X X X

X X X

X X X

ABREAST

X X X

X X X

X X X

Another problematic situation occurs when treating a narrow ditch If a ditch averages 8 feet wide you would apply a briquet every 125 linear feet to get the 1 briquet per 1 00 sq feet If the ditch averaged 2 feet wide you would apply one briquet for every 50 linshyear feet In the case of a narrow ditch and in the absence of any external mixing forces such as wind or water flow the concentrashytion will be higher than expected adjacent to the briquet because the toxicants cannot disperse equal distances in all directions In addition the concentration of AI at the center point between adjacent briquets may be below the lethal dose Exposure of mosquito larvae to sublethal doses may result in resistance to the AI If the water is flowing the problem is solved but you may get accelerated briquet erosion Altosid Briquet labels provide instructions for treatshyments in moving water

East Volusia Mosquito Control District (Florida) developed a method to apply a whole seasons worth of Altosid (30-day) Briquets

-ltgt-BRIQUETS

10 15 20 25 30 35

-0- XR BRIQUETS

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DAYS AFTER APPLICATION

Figure 1

Release rates for Altosid Briquets altosid XR Briquits and Altosid Pellets

Fall1997 15

at one time They cap a 6-8 inch section of 1-inch ID PVC pipe atshytach this (cap-side up) to an alumishynum stake (packing tape works great) and drill a 38 inch hole through it at the other end Brishyquets are inserted into the cylinder sometimes with color coded poker chips as spacers and a wire is run through the hole (or the stake is bent inward) to prevent the briquets from falling out prematurely The stake is driven into the bottom at the breeding site As the breeding site is flooded the bottom briquet erodes away releasing AI Trapped air prevents water from reaching the other briquets Another briquet falls down to take its place when it is about gone A field inspector can count poker chips to see how many Altosid Briquets have been used up

When bottom contours are highly irregular and the water depth is shallow and decreasing you may

not want to use briquet formulations at all Consider whether or not the briquet will ever be isolated from any part of the intended treatment area during its active life If so larshyvae may escape control efforts The amount of carrier material used can dictate the quality of control you achieve and is a very important consideration Unless we formulate our own pesticides we must work with a fixed amount of toxicant per pound as determined b~middot the manushyfacturer for an average situation Wouldnt it be nice to have a series of dry formulations based on the same AI that best fit different situashytions

Consider Figure 2 for a moment It shows the approximate average number of particles per square yard for four different carriers This graph is the result of investigations by students attending the weekshylong Florida Mosquito Control Asshysociation Dodd Short Courses on

Larviciding during 1996 and 1997 plus the work of Pasco CMCDs John Schaediger who washed and counted thousands of grains of sand Notice that 6 pounds of Biodac1200 contain about the same number of particles as 1 0 lbs of 1 014 grit corn cob If you have determined that 1 0 lbs of Vectobac CG (which uses 1 014 grit corn cob) is the correct application rate for you then perhaps 6 pounds of Biodac 1200 formulated with the same amount of Bti will do the same job and save you 40 in weight At these rates they both contain approximately the same number of carrier particles per pound The weight difference could increase the economics of aerial application where the lower weight translates into more acres per payshyload per flight

We apply 75 lbs of granulated 1 014 grit corncob per acre as our base rate This includes both in-

200 --------------------------------------------------------------~

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1 2 3

Fall1997

4

daC 1200 BlO

1014 corncob

5 6

Pounds per acre Figure 2

7

58 corncob

8 9 I

10

house mixes of blank granules with active ingredients and commercially finished products The 75 lbs is not just a figure that has been pulled out of the sky but one that many trials and observations have shown to be necessary to get good coverage with a variety of bottom contours and vegetation types You may need a different base rate When field personnel are conshyfronted with heavy detritus or vegshyetation aggregated larvae or a preponderance of late in star larvae they can then increase their applishycation by slowing down their pace or narrowing the swath to raise the dosage of pesticide (remembering to stay within the maximum labeled rate)

Whatever the formulation the proper application is critical to the efficiency and effectiveness of your program Larvicide labels comshymonly include only very general guidelines for application techshyniques or equipment selection This latitude allows applicators and technical staffs to choose a system that works best for their circumshystances A granular label notes the material should be applied unishyformly in conventional aerial and ground equipment

Equipment Calibration

Equipment calibrations are imshyportant for the effectiveness of your operation Consistency is born out of practice on top of more practice Failures of larvicides are often atshytributed to missed areas caused by poor applications Calibrating flows on dry application equipment is done either by timing how long it takes for a known amount to pass through the unit or by collecting all the material blown from the nozzle for a fixed period of time and then weighing it Either should be done by two people one that handles the machine and one that does the timshying The collection method retains

the material for subsequent tests but may restrict the flow on certain machines Machines with powershyful air blasts can only be checked by timing the discharge of a known quantity

Knowledge of the flow rate and of factors affecting it are critical to calibration The most common powshyered ground equipment used for dry applications is the gasolineshyengined backpack mistblower duster The units are capable of providing even coverage good throw and are simple to use They typically broadcast granules in a 40-60 ft swath width with the operator walking at 1-3 miles per hour This translates to 5-20 acres per hour of spray time Several things can be done to change the flow rate with the nozzle orifice or disc as the primary determinate Changing the pressure will also change the flow but to a much lesser degree and it has other side effects Some power dusters have movable grates that regulate flow over the normal opshyerating range Some brands have a series of replaceable orifice discs that allow discharge rate changes in small steps Blower speed also affects the throw but that should have marginal effect on the disshycharge rate

Other ground equipment that may be used include crank slinger seeders horn seeders and modishyfied ULV equipment (eg Arrow Guns mentioned above) The flow of spinning disc spreaders or othshyers with a mechanical agitator may be somewhat affected by the opshyerational speed Horn seeders which have about a 20 ft swath width when applying Bti granules are often used by our field personshynel to treat small sites They have replaced the Dipper and Bucket method where an applicator fills a dipper from a bucket of granules and then carefully and evenly broadcasts them

An Example

Assume you have determined that you can comfortably apply B ti corncob granules in 50ft swaths at 2 mph (121 acreshour) using a duster and you want to apply them at 25 to 10 lbsacre To get proper coverage in typical vegetation you will use 5 lbsacre and when conshyfronted with adverse conditions you may double or in this case with a maximum label rate of 20 lbs acre quadruple the application to get the proper dosage of pesticide to the insect

Fill the hopper with granules making sure not to get any pieces of paper or other debris mixed into the product If the unit is equipped with an air agitation system make sure that it is operational Start the engine and make sure that the granules are free flowing through the nozzle If the unit is equipped with an adjustable gate style regushylator center it for an initial trial Close the flow control For collectshying granules you need a nylon stocking and a scale that measures to ounces or grams Place the stocking over the discharge tube and secure it with a rubber band The stocking should be supported so it wont pinch the air flow off Run the blower up to speed and then open the flow valve as you start timing Have the operator open the valve as the stop watch is started

Because of the very low flows (small quantities) of granules needed take a sample over a given period in the 3-5 minute range Shut the flow off as the timer notes the end of the period Pull the colshylection into the bottom of the stockshying and remove it from the nozzle Place another stocking on the duster and collect a second sample and then a third sample Collect at least three samples weigh each and average the results Be sure to subtract the weight of the stock-

Fall1997 17

ing before calculating the average If one sample volume is much higher or lower than the other two samples then replace the odd sample with a new one Assume you collected three 5-minute samples that weigh 61 64 and 59 oz each The average is 61 3 oz5 min or 1227 ozmin

Practice

Swath tests are best done inishytially using a paved surface such as a parking lot for a practice spray plot because the granules are easshyily seen Blank granules for pracshytice and for your own formulating may be purchased from The Andersons (800-537-3370) and other sources Get 1014 grit if you use Vectobac CG or an equivalent and 58 grit if you use Vectobac G or an equivalent Fill the hopper with a weighed quantity of granules and walk over the plot trying to cover the entire area with an even dosage To determine how much was applied empty the hopper and weigh the material remaining Afshyter a good distribution has been

mast~red move onto a measured field where the terrain is more diffishycult and continue practicing Proshygressively move into more difficult areas as your skill level increases You can get to the point where you know what 5 lbsacre looks like in any habitat and then when you apshyply the real stuff you will know you have done so properly

Assume your practice spray plot is 18 of an acre Therefore to get the proper dose you want to apply 18 of 5 lbs (0625 lbs or 10 oz) to the plot You earlier calculated that your duster is putting out approxishymately 1225 oz per min The calshyculated time to put out the 1 0 oz required to treat the test plot is 082 minutes or49 seconds [determined by dividing 10 ounces by 1225] You also determined that you can treat 121 acreshour at a 2 mph walking speed At that speed you can treat about 16 of an acre in 49 seconds You have three choices to adequately cover your 18 acre practice plot 1) You can walk at your normal speed and apply at a rate slightly higher than 5 lbsacre 2) you can walk a little slower and

BVA

apply at the normal rate or 3) you can decrease the flow rate a bit to achieve the target rate at your norshymal application speed The choice is yours

If you have any questions feel free to contact the authors at Pasco County Mosquito Control District 2308 Marathon Road Odessa Fl 33556 Phone 813-376-4568 Fax 813-376-470 Email pcmcdgtenet

~

Doug middot wassmer _ _Jim middot _ Robinson middotand Jack-Frerich middotmiddot middot are-middot vyith the pascomiddotmiddotc_qun~y middot Mosquito Control bistr_ict middot

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In order to control or eradicate vector-borne disease the world Health Organization launched a substantial program of research on the screening evaluation and deshyvelopment of pesticides for the conshytrol of disease vectors and human pests in the early 1960s This proshygram of research and development continued into the 1970s Various collaboration centers and WHO regional research laboratories were involved in this multiphasic evaluashytion and research program This program was later designated as WHO-PES (WHO Pesticides Evaluation Scheme) which inshycluded laboratory screening of new pesticides and their formulations and finally small-scale and largeshyscale village field trials where effishycacy safety and feasibility of applishycation were studied Additionally whenever possible impact on the level of endemic diseases was also assessed The 41

h phase of this scheme addressed specification of pesticides and their formulations to be used in vector control

The WHO-PES program evenshytually came to a halt in the eighties and with restructuring of the vector Biology and Control Division in WHO this program came to a grinding halt It soon became apshyparent that member countries carshyrying on substantial vector control programs especially mosquito conshytrol operations soon reached the stage when appropriate tools and strategies for use in operational programs became quite scarce Member countries put forward deshymands for the development of more effective and safer chemical and

20 Fa111997

biological control measures To reshyspond to this global demand the Division of Control of Tropical Disshyeases (CTD) at WHO reinvigorated the WHO-PES Program by holding an informal consultation on the Evaluation and Testing of Insectishycides on October 1996 where I was asked to serve as the Chairperson of the consultation Copies of the report of this Consultation can be obtained from Dr Zaim Morteza whose address appears at the end of this article

As a result of the Informal Conshysultation and other discussions held at WHO regarding the future need for public health pesticides CTD recently (1996) launched the GCDPP program This is indeed a crucial program which requires colshylaboration among national and inshyternational agencies research inshystitutions industry and regulatory agencies The main objectives elshyements and scope of this program are briefly discussed below

The main objectives of the GCDPP program are

bull To facilitate the search for alternative pesticides including mishycrobial pesticides as well as applishycation methodologies

bull To advise on the relative priority of activities within the manshydate of GCDPP

bull To advise on issues related to the development and use of pesshyticides and application equipment within the context of WHOs global disease control strategies

bull To promote harmonization of activities related to pesticide deshyvelopment and safe use

bull To promote and encourage the highest quality of work through appropriate resource mobilization

bull GCDPP will serve as an advisory group to CTDWHOPES in matters of pesticide developshyment safe and proper use and apshyplication equipment

Membership and Meetings

A number of agencies organishyzations and manufacturers of pesshyticides and application equipment will become members of GCDPP as well as foundations and WHO Collaborating Centers Other groups and -organizations involved in manufacturing pest manageshyment and crop protection will also be invited Attempts will be made to maximize representation but at the same time ensure appropriate balance In addition to the above distinguished scientists and direcshytors of WHO Regional Offices may also be invited to attend the meetshyings of GCDPP

GCDPP will provide a forum for the exchange of technical informashytion and oversee the WHO-PES biennial plan and collaboration with other organizations and institutions GCDPP will meet every other year in Geneva Switzerland Informal consultation meetings on specific topics will be convened as the need arises CTD will be responsible for the organization of such meetings

continued on page 25

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How many of you know the names Norma Jean Baker Cornelius Magillicutty dichloroshydiphenyl-trichloro-ethane Haliaeetus leucocephalus and its distant relative Taxodium distichum How about Aedes albopictus Well if you are willing to bet $100 you know all six withshyout looking at the answers then you are either very bright very old well read or have too much time on your hands If you know only one I hope its the Asian tiger mosquito What if for the remaining five I gave you the hints of Some Like it Hot baseball legend insecticide whiteshyheaded bird and tree with knees The older ones amongst us and thats getting to be a higher percentshyage each year should recognize Marilyn Monroe and Connie Mack for the first two All of you should be ashamed of yourself if you dont recognized DDT The last two reshylated by name only are Bald Eagle and Bald Cypress If you got both of those you are probably psychic and also know what the point of this article is

And what is the point of this arshyticle the need for common names for mosquitoes Most of us know the birds plants and mammals by their common names Why then must we for the most part use scishyentific names for mosquitoes There are other names that would be more meaningful easier to spell and certainly easier to pronounce Ill bet my $100 right now that 50 of us couldnt spell Toxorhynchites or taeniorhynchus in a spelling bee Thank goodness Aedes abopictus had a catchy common name when

- bull bull -middot ~ bull middot- ~ bull ~ bull

it became established in the US in 1985 Never mind that the common name conjured up all sorts of wrong impressions Asian tiger mosquito was a lot easier for the public and press and I dare say most mosshyquito control practitioners to undershystand and remember Also our friends at the Entomological Socishyety had the accepted common name as Forest Day mosquito but to their credit they changed it to what every one calls it the Asian tiger mosquito

So despite their scientific bent scientists can be influenced to change their minds If common names and abbreviations too didnt have a purpose that is to help us to communicate then we would all be saying too many long boring and confusing sentences Consider the following For years Cornelius Magillicutty sprayed his back yard with dichloro-diphenylshytrichloro-ethane for Aedes abopictus and then years later with Norma Jean Baker at his side watched the thin-shelled eggs of Haliaeetus leucocephalus drop out of 500-year old Taxodium distichum that he loved so much Yawn

Its that kind of phraseology that keeps people including some scishyentists from reading the scientific literature When trying to commushynicate any word or phrase that your listener doesnt know or understand tends to confuse them annoy them or make them feel inferior and that often makes them stop listening Communicating with the public has become a major mosquito control activity in recent years When com-

municating with the public scientific terms and jargon are neither desirshyable or necessary Mosquito control activities can be explained in very simple terms We could use the term Bacillus thuringiensis var israeensis instead of BTl but how many of us do Telling the average person SLE is an arbovirus doesnt give them any more information than telling them its a virus

And whats with this italics stuff for scientific names Ask people (inshycluding you perhaps) why we italishycize scientific names and most will probably guess that its to emphashysis the term Wrong If you care why look it up Lets forget it from now on OK If you cant write Culex quinquefasciatus without italics then consider my alternative-comshymon names that dont need to be italicized

The Entomological Society of America has a committee that conshysiders and usually rejects proshyposed official common names for insects There are only 14 mosshyquitoes on that list and I dare say most of us dont use most of them The problem with this list is that it was developed by scientists and everyone knows that all scientists are mad not just those in the movshyies Scientists want to do things in a scientific manner-logical meshythodical and precise Just because the entomological journals will only let you use accepted common names in their pages doesnt mean we cant use other common names in presentations and io print and we should

Fall1997 23

What we need is a list of comshymon names that the average mosshyquito control practitioner uses No one that anyone takes seriously will say they found some Culex pipiens quinquefasciatus (note no italics) in a polluted pond Most will say quinks Sure we can capitalize Quinks if it makes you feel better it does me So why are we afraid to write Quinks in our reports or say Quinks in formal talks Most people probably dont say quinks (see I dont insist on capitalization) because they think it makes them sound unprofessional Quinks is a distinctive short easy to rememshyber and fun to say name it has a beat that you can dance to and I give it a 99 Does anyone you know call quinks the southern house mosquito the accepted common name How about northern house mosquito for pipiens

Taenies or taenys or whatshyever spelling you want to use is easily recognized by east and south coast mosquito people as the comshymon name for Aedes taeniorhynchus one of the saltmarsh mosquitoes Again its a distinctive short easy to rememshyber and fun name It also describes the size of the species somewhat small or teeny-a bonus And who doesnt use Tox as the common name for our other spelling bee example

We dont hesitate to use comshymon names for a group of mosquishytoes that breed in a particular habishytat In addition to saltmarsh mosshyquitoes we refer to floodwater mosquitoes (which incidently also describes many saltmarsh mosquishytoes) tree hole mosquitoes dirty water mosquitoes grey water mosshyquitoes freshwater mosquitoes container-breeding mosquitoes pasture mosquitoes rock hole mosshyquitoes crab hole mosquitoes and on and on These habitat names are not mutually exclusive For exshyample pasture mosquitoes are also floodwater mosquitoes and fresh-

24 Fall1997

water mosquitoes By the way the translation of floodwater mosquito according to the Entomological Soshyciety is Aedes sticticus What Habitat names are also convenient for discussions among people from different geographic areas For example nature tends to give the same qualities to mosquitoes that breed in tree holes regardless of whether they are tree holes in Calishyfornia Virginia Queensland or Borneo From an operational mosshyquito control standpoint knowing the habitat of the mosquito can be more informative than knowing its scientific name

So lets consider some common names of species that we might use One common pest and potenshytial vector species that needs a common name is Coquillettidia perturbans (I think Ive weaned myself from italics) the aggressive biter whose larvae attach to the roots of aquatic plants particularly cattails (I could have said Typha species) Cattail mosquito is a natural even though larvae may attach to a variety of plants Another name could be the salt and pepshyper mosquito or another name taken from its scientific name could be the perturbing mosquito

How about the Anopheles The accepted common name for Anopheles quadrimaculatus is the common malaria mosquito This may have been accurate when malaria was a problem in this counshytry but now neither malaria nor this mosquito is common in this counshytry Im sure most of our hypothetishycal naming committee made up of operational mosquito controllers would call them quads

We have already dealt with Quinks Another obvious common name for another Culex Cx salinarius is sally or sallys or sallies Culex restuans is a little more tricky but how about rusty Rusty is suggestive of the color of the mosquito and it is similar to

resty a name that just doesnt sound right to me

Aedes vexans a common floodshywater mosquito in much of the US needs a common name The acshycepted common name vexans mosquito would be OK if most people know what vexing means And if they do why not call it the vexing mosquito Calling Aedes aegypti in the US by its accepted name the yellowfever mosquito is misleading Yellow fever has been absent from the US since right after the turn of the century Aegypti or gyps is often used by field and lab workers so why not adopt those terms

I could go on and on but Im more interested in what you think If you will send me your common names (keep it clean please) for any species you are familiar with Ill be happy to compile them and report back in a future article in Wing Beats (Theres that italics again different reason) If they appear in Wing Beats maybe just maybe we can call them official common names You can fax me at 561-778-7204 or E-mail me at cdmognvifas ufledu By the way you can address the message to Charlie Chas or Char The only person I insist call me doctor is my ex-wife and I would rather she didnt call me at all

-C_h~ulie M~rtis middot is an Assoshy _ciate middotPi~fesso( at the Unishy versity ~f floridas Medical Eiitomology Laboratory middot hi middot middot

Verq Beach Fiorida~

continued from page 20

providing support for report prepashyration and other documents and perform secretarial functions

Funding

In order to advance the objecshytives of GCDPP a stable source of funding will be necessary WHO CTD (WHO-Division of Control of Tropical Diseases) will establish and administer a trust fund which will be designated as GCDPP-Trust Fund which will be administered according to the WHO financial rules regulations and practices

The trust fund will be used to convene meetings production and dissemination of documents exshychange and dissemination of inforshymation on the need for public health pesticides and equipment and for activities which will promote the development and use of alternative safe compounds or application equipment

1James of organizations institushytions foundations manufacturers and individuals participating and contributing to this program will be listed Each participant will be enshycouraged to make annual contribushytions to the trust fund

Further Information

For further information on WHOshyPES or GCDPP contact Dr Zaim Morteza WHO-PES CTD World Health Organ ization 1211 Geneva 27 Switzerland E-mail zaimmwhoch

Nlir smiddotMulla is a Profes-sor with the Deparfrilent of ~nt-oshy_mologyUniverslty at califor middot -nia Riversidemiddot CA92521 middot _ middot middot

-

middotMulla= Receives -middot

Recognition Awar(j _

Mir S Mulla Professor of Entoshymology Department of Entomolshyogy University of California Rivershyside CA was presented the Scishyence Society of Thailand~ Meritoshyrious Recognition Award by the Thailand Minister of Science and Technology last October

Mulla an authority on insects of medical and public health imporshytance was cited for his efforts and leadership in organizing the First International Symposium on Biopesticides convened at Naresuan University in Thailand This symposium attended by some 300 participants from 20 countries covered biodiversity safety toxicshyity efficacy and proper use of biopesticides based on natural products and pathogenic organshyisms The proceedings of this first symposium amounting to 300 pages will be published soon

Mulla informs us that the 2nd International Symposium on Biopesticides will be held in late October 1998 on Langkawi Island off the coast of Malaysia Anyone interested in receiving further inforshymation regarding the proceedings or the second symposium should contact Dr Mulla at tel (909) 787-5818 fax (909) 787-4210 and eshymail mulla mailucredu

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Notice Psotophora middotgtcyaneseens collect~d middotin Aiachua County FL

- ~

and 9 pupae of this species were collected by the author from a sunshylit small (ca 2 m diam and 20 em deep) grass-lined pool filled with rainwater at Gainesville Florida

a common identification number with their 41h instar larval and pupal exuviae On subsequent visits to the site no additional Ps cyanescens were collected

Psorophora cyanescens (Coquillett) previously has been reported in Florida from the followshying counties Bay Duval Escambia Gadsden Hillsborough Jackson Leon Okaloosa Suwannee and Union (HT Evans Florida Mosquito Control Handbook 1994) On 26 May 1997 one 4h instar larva

Also collected from the pool were numerous larvae and pupae of Psorophora columbiae (Dyar and Knab) Aedes vexans (Meigen) and Culex salinarius Coquillett and 17 4h instar larvae of Psorophora ciliata (Fabricus) All immatures were individually reared and the resulting adults were linked by

John -Fmiddotmiddoteeinert is with Jlie CeMte(for Medicental middotAgricultural

aridVet$rih~rY Entomology u s ~ Department oFAgricul~umiddotre Agri-

26

culture~ 8e$earch Service 1600 1700 SW 23dDrive Gainesvillemiddotmiddot

bull lt middot bullbullbull _ bull bull middot J

Florida 32604 middot middot middot

REGISTRATION FOR WORLD DIRECTORY OF ARTHROPOD VECTOR RESEARCH AND CONTROL SPECIALISTS

In order to update the Directory we would appreciate your completing this form Please type or print and return it to the address listed below We would also appreciate your copying this form and supplyshying it to any colleagues who are working in this field Your cooperation will allow greater communication and efficiency within our profession

Name (Last or family name) (First or given name)

Title of present position ----------- Nationality

Present Address _______________________________ _

Telephone (Work) _____ (Home) _____ Fax ______ E-mail _______ _

DEGREES DATE UNIVERSITY

Languages understood Specialty ------------

Professional society affiliations AMCA __ SOVE __ ESA __ ASTMH __ RSTMH __ ESC __

Other ______________________ _

Please return by Air Mail to Dr Eugene Gerberg Chairman AMCA International Affairs Committee 5819 NW 57th Way Gainesville FL 32653-3257 USA

Fall1997

Date completed

Were Sales VW ampR s professional educated experienced staff knows and understands the vector control industry You can count on us to be there when you need us

Were Service VW ampR has over 70 locations across the United States and Mexico that offer convenient local vector control products Count on our professional and knowledgeable industry experts to assist you in finding solutions to your problems

Were Support bull VWampRs web site is designed to provide you with the latest

industry information Visit PestWeb for labels slides MSDSs industry news and weather reports

bull ChemCare provides you with chemical waste management solutions liSTW

bull Our licensed instructors are teaching t I~middot middotmiddot 1~ middot bull seminars in classrooms across the nation bull~middot-w~ You can count on us to he p you stay current

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The Best Products including ABATE As American

Cyanamid exits the mosquito control market we are honored to be the exclusive formulashytor and distributor of ABATE products

to only a middotWarning label The new amendshyed labels also allow 1 2 and 5 Skeeter ABATE to be used as a pre-hatch in breeding and floodplain areas And now all Skeeter

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1 bullbull )1 bullbullbull 1111 11 bullbullbullbull 11 1 bullbull 111 bullbullbull 111 bullbullbull 111 bullbullbull 11 bullbullbullbull 11 1 R1chard Da r s 1e Florida Medic a l Entomology Laborator y 200 9th St SE vera Beac h FL 32962-4657

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Page 12: Wing Beats Volume 8 Number 3wingbeats.floridamosquito.org/Wingbeats/pdfs/Vol8No3.pdf · 2014. 4. 11. · Stan Cope, Norfolk, VA Betsy Field, Vero Beach, FL John Gamble, New Smyrna

9eat~te Applyitlg iarvietdes middot Forntulated middot With ~Dty Carriers middot middotmiddot middotmiddot middot bullmiddotmiddotmiddotbull middot

bullbull middotmiddot by J)~1f)~-~~~afladl~

Most modern mosquito control operations include larviciding as an integral part of their pest manageshyment practices Mosquito larvicides are available in a wide range of types and formulations Dry formushylations include briquets granules and pellets

Formulations usually are applied directly out of the container genershyally with no need for mixing Some sand formulations may be made on site by following instructions proshyvided on the labels There is usushyally a range of rates for each forshymulation to cover different habitats and water quality depth movement and organic content plus other facshytors discussed on product labels

Selecting the formulation and application rate that gives you the best coverage for your larval habishytats requires some thought Dryshyformulated larvicides may be apshyplied by hand with ground equipshyment and by air In this article we focus on ground applications and calibration as we have in the previshyous two articles in this series

Calibration is an encompassing principal that includes

1 determining what insecticide formulation to use

2 the rate of toxicant per acre to apply

3 the total spray volume needed to use to get good coverage

4 determining (or setting) the flow through the nozzle

5 determining the effective swath width and if appropriate the walking pace of application

14 Fall1997

After these parameters are set the applicators should practice by spraying a measured area against the clock Through practice the applicator will develop visual cues and hand-eye coordination which leads to standardizing hisher covshyerage per minute These factors apply to granular blowers horn seeders and other dry formula apshyplication tools including aerial spreaders

Choosing The Formulation

The three active ingredients most commonly used in dry larvishycide formulations are temephos sshymethoprene and delta-endotoxin (Bti) All three may be mixed with plaster (eg Altosid Briquetsreg Altosid XR Briquetsreg Altosid Pelshyletsreg and 5 Skeeter Abatereg) with food substances (Bactimos Pelshyletsreg) or with cork (Bactimos Brishyquetsreg) They also may be attached to ground-up corncob (eg Vectobac Greg and Vectobac CGreg) paper pulp waste material (eg Abadac which is liquid Abate plus Biodacreg Aitodac which is Altosid Liquid Larvicidereg plus Biodac) or sand (eg 1 Skeeter Abatereg LarvXSGreg and Aitosand which is Altosid Liquid Larvicide plus sand) Briquets generally are designed for use at rates ranging from 1 per 200 square feet (218 per acre) to 1 per 25 square feet (1742 per acre) A typical application rate is 1 per 1 00 square feet (436 per acre) in many situations Some granular products may be applied at up to 20 lbs per

acre but applicators typically used 5-10 lbs per acre

Briquets and pellets slowly reshylease toxicants to provide sustained control for one or more months The Bti toxicants are stomach poisons which must be placed in that part of the water column where the tarshyget larvae feed S-methoprene and temephos are contact poisons which mix with the entire water column Bactimos Briquets which float are primarily a mixture of Bti and cork and are often staked in place to prevent their being moved by wind waves and animals Altosid Briquets Altosid XR Brishyquets Altosid Pellets and Skeeter Abate Pelletsreg are made with plasshyter and sink to the bottom Some mosquito control agencies place briquets in fine wire mesh baskets and suspend them in storm drains just above the bottom so they are not swept away or buried Sand formulations also sink but a new Bti formulation LarvXsg is coated with vermiculite which reshyleases and carries the Bti back to the surface from which it is reshyleased Some Bti corncob granshyules in each bag will float while othshyers may sink This is also true for formulations using Biodac as a carshyrier

Briquets are most commonly dispensed by hand but Clarke Equipment Companys Arrow Gunreg is sometimes used to broadcast Altosid Briquets but not Bactimos Briquets The Arrow Gun uses compressed air captured from a non-thermal ULV aerosol generashytor to propel briquets down its barshyrel It may be used for lobbing one

or a few briquets into isolated small pools where placement is not a critishycal issue both in terms of cost and eHiciency Applicators may also use a slingshot The Arrow Gun works very well for applying pellet ground corn cob and other granushylar carrier formulations in large amounts In order for the equipment to be used properly as with any application equipment it must first be calibrated

Figure 1 shows release rates for Altosid Briquets Altosid XR Brishyquets and Altosid Pellets These curves are adapted from an article by Dr Doug Ross et a called Methoprene concentrations in freshwater microcosms treated with sustained-release Altosid formulashytions (Mosquito News 1994 Vol 1 0(2 pt 1 pp 202-21 0 They are indirect measures of release rates derived by measuring the concenshytration of active ingredients in the water Notice that the AI is not reshyleased uniformly throughout the active life of the formulations Conshysider this when you are larviciding We suspect that most solid larvishycides have characteristic release rate curves but we are not aware of any published descriptions If we could tap into the EPAs confidenshytial data files we might be able to find out more about this topic

In a large rectangular area usshying a 1 briquet1 00 sq ft applicashytion rate if briquets are placed in the recommended 1 0 foot intervals in even rows the maximum (diagoshynal) distance between two adjacent briquets is a little over 14 feet Imagshyine a square with a briquet in each corner and mosquito larvae in the center a little over 7 ft from each briquet To decrease the maximum diagonal distance between briquets to 1 0 feet while still placing briquets every 10 feet in rows stagger the rows so the briquets in the second row are between the briquets in the first row Materials science tells us this is the most efficient spacing scheme We recommend practic-

ing briquet placement in a mowed yard prior to actual field work This will allow you to get your spacing right Monroe County (Florida) Mosquito Control District field pershysonnel typically hand-apply over 20000 Altosid Briquets every year by walking their breeding sites with a 2 gallon pail full of product

STAGGERED X X X

X X X

X X X

ABREAST

X X X

X X X

X X X

Another problematic situation occurs when treating a narrow ditch If a ditch averages 8 feet wide you would apply a briquet every 125 linear feet to get the 1 briquet per 1 00 sq feet If the ditch averaged 2 feet wide you would apply one briquet for every 50 linshyear feet In the case of a narrow ditch and in the absence of any external mixing forces such as wind or water flow the concentrashytion will be higher than expected adjacent to the briquet because the toxicants cannot disperse equal distances in all directions In addition the concentration of AI at the center point between adjacent briquets may be below the lethal dose Exposure of mosquito larvae to sublethal doses may result in resistance to the AI If the water is flowing the problem is solved but you may get accelerated briquet erosion Altosid Briquet labels provide instructions for treatshyments in moving water

East Volusia Mosquito Control District (Florida) developed a method to apply a whole seasons worth of Altosid (30-day) Briquets

-ltgt-BRIQUETS

10 15 20 25 30 35

-0- XR BRIQUETS

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DAYS AFTER APPLICATION

Figure 1

Release rates for Altosid Briquets altosid XR Briquits and Altosid Pellets

Fall1997 15

at one time They cap a 6-8 inch section of 1-inch ID PVC pipe atshytach this (cap-side up) to an alumishynum stake (packing tape works great) and drill a 38 inch hole through it at the other end Brishyquets are inserted into the cylinder sometimes with color coded poker chips as spacers and a wire is run through the hole (or the stake is bent inward) to prevent the briquets from falling out prematurely The stake is driven into the bottom at the breeding site As the breeding site is flooded the bottom briquet erodes away releasing AI Trapped air prevents water from reaching the other briquets Another briquet falls down to take its place when it is about gone A field inspector can count poker chips to see how many Altosid Briquets have been used up

When bottom contours are highly irregular and the water depth is shallow and decreasing you may

not want to use briquet formulations at all Consider whether or not the briquet will ever be isolated from any part of the intended treatment area during its active life If so larshyvae may escape control efforts The amount of carrier material used can dictate the quality of control you achieve and is a very important consideration Unless we formulate our own pesticides we must work with a fixed amount of toxicant per pound as determined b~middot the manushyfacturer for an average situation Wouldnt it be nice to have a series of dry formulations based on the same AI that best fit different situashytions

Consider Figure 2 for a moment It shows the approximate average number of particles per square yard for four different carriers This graph is the result of investigations by students attending the weekshylong Florida Mosquito Control Asshysociation Dodd Short Courses on

Larviciding during 1996 and 1997 plus the work of Pasco CMCDs John Schaediger who washed and counted thousands of grains of sand Notice that 6 pounds of Biodac1200 contain about the same number of particles as 1 0 lbs of 1 014 grit corn cob If you have determined that 1 0 lbs of Vectobac CG (which uses 1 014 grit corn cob) is the correct application rate for you then perhaps 6 pounds of Biodac 1200 formulated with the same amount of Bti will do the same job and save you 40 in weight At these rates they both contain approximately the same number of carrier particles per pound The weight difference could increase the economics of aerial application where the lower weight translates into more acres per payshyload per flight

We apply 75 lbs of granulated 1 014 grit corncob per acre as our base rate This includes both in-

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4

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1014 corncob

5 6

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7

58 corncob

8 9 I

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house mixes of blank granules with active ingredients and commercially finished products The 75 lbs is not just a figure that has been pulled out of the sky but one that many trials and observations have shown to be necessary to get good coverage with a variety of bottom contours and vegetation types You may need a different base rate When field personnel are conshyfronted with heavy detritus or vegshyetation aggregated larvae or a preponderance of late in star larvae they can then increase their applishycation by slowing down their pace or narrowing the swath to raise the dosage of pesticide (remembering to stay within the maximum labeled rate)

Whatever the formulation the proper application is critical to the efficiency and effectiveness of your program Larvicide labels comshymonly include only very general guidelines for application techshyniques or equipment selection This latitude allows applicators and technical staffs to choose a system that works best for their circumshystances A granular label notes the material should be applied unishyformly in conventional aerial and ground equipment

Equipment Calibration

Equipment calibrations are imshyportant for the effectiveness of your operation Consistency is born out of practice on top of more practice Failures of larvicides are often atshytributed to missed areas caused by poor applications Calibrating flows on dry application equipment is done either by timing how long it takes for a known amount to pass through the unit or by collecting all the material blown from the nozzle for a fixed period of time and then weighing it Either should be done by two people one that handles the machine and one that does the timshying The collection method retains

the material for subsequent tests but may restrict the flow on certain machines Machines with powershyful air blasts can only be checked by timing the discharge of a known quantity

Knowledge of the flow rate and of factors affecting it are critical to calibration The most common powshyered ground equipment used for dry applications is the gasolineshyengined backpack mistblower duster The units are capable of providing even coverage good throw and are simple to use They typically broadcast granules in a 40-60 ft swath width with the operator walking at 1-3 miles per hour This translates to 5-20 acres per hour of spray time Several things can be done to change the flow rate with the nozzle orifice or disc as the primary determinate Changing the pressure will also change the flow but to a much lesser degree and it has other side effects Some power dusters have movable grates that regulate flow over the normal opshyerating range Some brands have a series of replaceable orifice discs that allow discharge rate changes in small steps Blower speed also affects the throw but that should have marginal effect on the disshycharge rate

Other ground equipment that may be used include crank slinger seeders horn seeders and modishyfied ULV equipment (eg Arrow Guns mentioned above) The flow of spinning disc spreaders or othshyers with a mechanical agitator may be somewhat affected by the opshyerational speed Horn seeders which have about a 20 ft swath width when applying Bti granules are often used by our field personshynel to treat small sites They have replaced the Dipper and Bucket method where an applicator fills a dipper from a bucket of granules and then carefully and evenly broadcasts them

An Example

Assume you have determined that you can comfortably apply B ti corncob granules in 50ft swaths at 2 mph (121 acreshour) using a duster and you want to apply them at 25 to 10 lbsacre To get proper coverage in typical vegetation you will use 5 lbsacre and when conshyfronted with adverse conditions you may double or in this case with a maximum label rate of 20 lbs acre quadruple the application to get the proper dosage of pesticide to the insect

Fill the hopper with granules making sure not to get any pieces of paper or other debris mixed into the product If the unit is equipped with an air agitation system make sure that it is operational Start the engine and make sure that the granules are free flowing through the nozzle If the unit is equipped with an adjustable gate style regushylator center it for an initial trial Close the flow control For collectshying granules you need a nylon stocking and a scale that measures to ounces or grams Place the stocking over the discharge tube and secure it with a rubber band The stocking should be supported so it wont pinch the air flow off Run the blower up to speed and then open the flow valve as you start timing Have the operator open the valve as the stop watch is started

Because of the very low flows (small quantities) of granules needed take a sample over a given period in the 3-5 minute range Shut the flow off as the timer notes the end of the period Pull the colshylection into the bottom of the stockshying and remove it from the nozzle Place another stocking on the duster and collect a second sample and then a third sample Collect at least three samples weigh each and average the results Be sure to subtract the weight of the stock-

Fall1997 17

ing before calculating the average If one sample volume is much higher or lower than the other two samples then replace the odd sample with a new one Assume you collected three 5-minute samples that weigh 61 64 and 59 oz each The average is 61 3 oz5 min or 1227 ozmin

Practice

Swath tests are best done inishytially using a paved surface such as a parking lot for a practice spray plot because the granules are easshyily seen Blank granules for pracshytice and for your own formulating may be purchased from The Andersons (800-537-3370) and other sources Get 1014 grit if you use Vectobac CG or an equivalent and 58 grit if you use Vectobac G or an equivalent Fill the hopper with a weighed quantity of granules and walk over the plot trying to cover the entire area with an even dosage To determine how much was applied empty the hopper and weigh the material remaining Afshyter a good distribution has been

mast~red move onto a measured field where the terrain is more diffishycult and continue practicing Proshygressively move into more difficult areas as your skill level increases You can get to the point where you know what 5 lbsacre looks like in any habitat and then when you apshyply the real stuff you will know you have done so properly

Assume your practice spray plot is 18 of an acre Therefore to get the proper dose you want to apply 18 of 5 lbs (0625 lbs or 10 oz) to the plot You earlier calculated that your duster is putting out approxishymately 1225 oz per min The calshyculated time to put out the 1 0 oz required to treat the test plot is 082 minutes or49 seconds [determined by dividing 10 ounces by 1225] You also determined that you can treat 121 acreshour at a 2 mph walking speed At that speed you can treat about 16 of an acre in 49 seconds You have three choices to adequately cover your 18 acre practice plot 1) You can walk at your normal speed and apply at a rate slightly higher than 5 lbsacre 2) you can walk a little slower and

BVA

apply at the normal rate or 3) you can decrease the flow rate a bit to achieve the target rate at your norshymal application speed The choice is yours

If you have any questions feel free to contact the authors at Pasco County Mosquito Control District 2308 Marathon Road Odessa Fl 33556 Phone 813-376-4568 Fax 813-376-470 Email pcmcdgtenet

~

Doug middot wassmer _ _Jim middot _ Robinson middotand Jack-Frerich middotmiddot middot are-middot vyith the pascomiddotmiddotc_qun~y middot Mosquito Control bistr_ict middot

middot Odessa middotFiorida middotmiddot-_ middot middot middot _ middot_

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In order to control or eradicate vector-borne disease the world Health Organization launched a substantial program of research on the screening evaluation and deshyvelopment of pesticides for the conshytrol of disease vectors and human pests in the early 1960s This proshygram of research and development continued into the 1970s Various collaboration centers and WHO regional research laboratories were involved in this multiphasic evaluashytion and research program This program was later designated as WHO-PES (WHO Pesticides Evaluation Scheme) which inshycluded laboratory screening of new pesticides and their formulations and finally small-scale and largeshyscale village field trials where effishycacy safety and feasibility of applishycation were studied Additionally whenever possible impact on the level of endemic diseases was also assessed The 41

h phase of this scheme addressed specification of pesticides and their formulations to be used in vector control

The WHO-PES program evenshytually came to a halt in the eighties and with restructuring of the vector Biology and Control Division in WHO this program came to a grinding halt It soon became apshyparent that member countries carshyrying on substantial vector control programs especially mosquito conshytrol operations soon reached the stage when appropriate tools and strategies for use in operational programs became quite scarce Member countries put forward deshymands for the development of more effective and safer chemical and

20 Fa111997

biological control measures To reshyspond to this global demand the Division of Control of Tropical Disshyeases (CTD) at WHO reinvigorated the WHO-PES Program by holding an informal consultation on the Evaluation and Testing of Insectishycides on October 1996 where I was asked to serve as the Chairperson of the consultation Copies of the report of this Consultation can be obtained from Dr Zaim Morteza whose address appears at the end of this article

As a result of the Informal Conshysultation and other discussions held at WHO regarding the future need for public health pesticides CTD recently (1996) launched the GCDPP program This is indeed a crucial program which requires colshylaboration among national and inshyternational agencies research inshystitutions industry and regulatory agencies The main objectives elshyements and scope of this program are briefly discussed below

The main objectives of the GCDPP program are

bull To facilitate the search for alternative pesticides including mishycrobial pesticides as well as applishycation methodologies

bull To advise on the relative priority of activities within the manshydate of GCDPP

bull To advise on issues related to the development and use of pesshyticides and application equipment within the context of WHOs global disease control strategies

bull To promote harmonization of activities related to pesticide deshyvelopment and safe use

bull To promote and encourage the highest quality of work through appropriate resource mobilization

bull GCDPP will serve as an advisory group to CTDWHOPES in matters of pesticide developshyment safe and proper use and apshyplication equipment

Membership and Meetings

A number of agencies organishyzations and manufacturers of pesshyticides and application equipment will become members of GCDPP as well as foundations and WHO Collaborating Centers Other groups and -organizations involved in manufacturing pest manageshyment and crop protection will also be invited Attempts will be made to maximize representation but at the same time ensure appropriate balance In addition to the above distinguished scientists and direcshytors of WHO Regional Offices may also be invited to attend the meetshyings of GCDPP

GCDPP will provide a forum for the exchange of technical informashytion and oversee the WHO-PES biennial plan and collaboration with other organizations and institutions GCDPP will meet every other year in Geneva Switzerland Informal consultation meetings on specific topics will be convened as the need arises CTD will be responsible for the organization of such meetings

continued on page 25

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How many of you know the names Norma Jean Baker Cornelius Magillicutty dichloroshydiphenyl-trichloro-ethane Haliaeetus leucocephalus and its distant relative Taxodium distichum How about Aedes albopictus Well if you are willing to bet $100 you know all six withshyout looking at the answers then you are either very bright very old well read or have too much time on your hands If you know only one I hope its the Asian tiger mosquito What if for the remaining five I gave you the hints of Some Like it Hot baseball legend insecticide whiteshyheaded bird and tree with knees The older ones amongst us and thats getting to be a higher percentshyage each year should recognize Marilyn Monroe and Connie Mack for the first two All of you should be ashamed of yourself if you dont recognized DDT The last two reshylated by name only are Bald Eagle and Bald Cypress If you got both of those you are probably psychic and also know what the point of this article is

And what is the point of this arshyticle the need for common names for mosquitoes Most of us know the birds plants and mammals by their common names Why then must we for the most part use scishyentific names for mosquitoes There are other names that would be more meaningful easier to spell and certainly easier to pronounce Ill bet my $100 right now that 50 of us couldnt spell Toxorhynchites or taeniorhynchus in a spelling bee Thank goodness Aedes abopictus had a catchy common name when

- bull bull -middot ~ bull middot- ~ bull ~ bull

it became established in the US in 1985 Never mind that the common name conjured up all sorts of wrong impressions Asian tiger mosquito was a lot easier for the public and press and I dare say most mosshyquito control practitioners to undershystand and remember Also our friends at the Entomological Socishyety had the accepted common name as Forest Day mosquito but to their credit they changed it to what every one calls it the Asian tiger mosquito

So despite their scientific bent scientists can be influenced to change their minds If common names and abbreviations too didnt have a purpose that is to help us to communicate then we would all be saying too many long boring and confusing sentences Consider the following For years Cornelius Magillicutty sprayed his back yard with dichloro-diphenylshytrichloro-ethane for Aedes abopictus and then years later with Norma Jean Baker at his side watched the thin-shelled eggs of Haliaeetus leucocephalus drop out of 500-year old Taxodium distichum that he loved so much Yawn

Its that kind of phraseology that keeps people including some scishyentists from reading the scientific literature When trying to commushynicate any word or phrase that your listener doesnt know or understand tends to confuse them annoy them or make them feel inferior and that often makes them stop listening Communicating with the public has become a major mosquito control activity in recent years When com-

municating with the public scientific terms and jargon are neither desirshyable or necessary Mosquito control activities can be explained in very simple terms We could use the term Bacillus thuringiensis var israeensis instead of BTl but how many of us do Telling the average person SLE is an arbovirus doesnt give them any more information than telling them its a virus

And whats with this italics stuff for scientific names Ask people (inshycluding you perhaps) why we italishycize scientific names and most will probably guess that its to emphashysis the term Wrong If you care why look it up Lets forget it from now on OK If you cant write Culex quinquefasciatus without italics then consider my alternative-comshymon names that dont need to be italicized

The Entomological Society of America has a committee that conshysiders and usually rejects proshyposed official common names for insects There are only 14 mosshyquitoes on that list and I dare say most of us dont use most of them The problem with this list is that it was developed by scientists and everyone knows that all scientists are mad not just those in the movshyies Scientists want to do things in a scientific manner-logical meshythodical and precise Just because the entomological journals will only let you use accepted common names in their pages doesnt mean we cant use other common names in presentations and io print and we should

Fall1997 23

What we need is a list of comshymon names that the average mosshyquito control practitioner uses No one that anyone takes seriously will say they found some Culex pipiens quinquefasciatus (note no italics) in a polluted pond Most will say quinks Sure we can capitalize Quinks if it makes you feel better it does me So why are we afraid to write Quinks in our reports or say Quinks in formal talks Most people probably dont say quinks (see I dont insist on capitalization) because they think it makes them sound unprofessional Quinks is a distinctive short easy to rememshyber and fun to say name it has a beat that you can dance to and I give it a 99 Does anyone you know call quinks the southern house mosquito the accepted common name How about northern house mosquito for pipiens

Taenies or taenys or whatshyever spelling you want to use is easily recognized by east and south coast mosquito people as the comshymon name for Aedes taeniorhynchus one of the saltmarsh mosquitoes Again its a distinctive short easy to rememshyber and fun name It also describes the size of the species somewhat small or teeny-a bonus And who doesnt use Tox as the common name for our other spelling bee example

We dont hesitate to use comshymon names for a group of mosquishytoes that breed in a particular habishytat In addition to saltmarsh mosshyquitoes we refer to floodwater mosquitoes (which incidently also describes many saltmarsh mosquishytoes) tree hole mosquitoes dirty water mosquitoes grey water mosshyquitoes freshwater mosquitoes container-breeding mosquitoes pasture mosquitoes rock hole mosshyquitoes crab hole mosquitoes and on and on These habitat names are not mutually exclusive For exshyample pasture mosquitoes are also floodwater mosquitoes and fresh-

24 Fall1997

water mosquitoes By the way the translation of floodwater mosquito according to the Entomological Soshyciety is Aedes sticticus What Habitat names are also convenient for discussions among people from different geographic areas For example nature tends to give the same qualities to mosquitoes that breed in tree holes regardless of whether they are tree holes in Calishyfornia Virginia Queensland or Borneo From an operational mosshyquito control standpoint knowing the habitat of the mosquito can be more informative than knowing its scientific name

So lets consider some common names of species that we might use One common pest and potenshytial vector species that needs a common name is Coquillettidia perturbans (I think Ive weaned myself from italics) the aggressive biter whose larvae attach to the roots of aquatic plants particularly cattails (I could have said Typha species) Cattail mosquito is a natural even though larvae may attach to a variety of plants Another name could be the salt and pepshyper mosquito or another name taken from its scientific name could be the perturbing mosquito

How about the Anopheles The accepted common name for Anopheles quadrimaculatus is the common malaria mosquito This may have been accurate when malaria was a problem in this counshytry but now neither malaria nor this mosquito is common in this counshytry Im sure most of our hypothetishycal naming committee made up of operational mosquito controllers would call them quads

We have already dealt with Quinks Another obvious common name for another Culex Cx salinarius is sally or sallys or sallies Culex restuans is a little more tricky but how about rusty Rusty is suggestive of the color of the mosquito and it is similar to

resty a name that just doesnt sound right to me

Aedes vexans a common floodshywater mosquito in much of the US needs a common name The acshycepted common name vexans mosquito would be OK if most people know what vexing means And if they do why not call it the vexing mosquito Calling Aedes aegypti in the US by its accepted name the yellowfever mosquito is misleading Yellow fever has been absent from the US since right after the turn of the century Aegypti or gyps is often used by field and lab workers so why not adopt those terms

I could go on and on but Im more interested in what you think If you will send me your common names (keep it clean please) for any species you are familiar with Ill be happy to compile them and report back in a future article in Wing Beats (Theres that italics again different reason) If they appear in Wing Beats maybe just maybe we can call them official common names You can fax me at 561-778-7204 or E-mail me at cdmognvifas ufledu By the way you can address the message to Charlie Chas or Char The only person I insist call me doctor is my ex-wife and I would rather she didnt call me at all

-C_h~ulie M~rtis middot is an Assoshy _ciate middotPi~fesso( at the Unishy versity ~f floridas Medical Eiitomology Laboratory middot hi middot middot

Verq Beach Fiorida~

continued from page 20

providing support for report prepashyration and other documents and perform secretarial functions

Funding

In order to advance the objecshytives of GCDPP a stable source of funding will be necessary WHO CTD (WHO-Division of Control of Tropical Diseases) will establish and administer a trust fund which will be designated as GCDPP-Trust Fund which will be administered according to the WHO financial rules regulations and practices

The trust fund will be used to convene meetings production and dissemination of documents exshychange and dissemination of inforshymation on the need for public health pesticides and equipment and for activities which will promote the development and use of alternative safe compounds or application equipment

1James of organizations institushytions foundations manufacturers and individuals participating and contributing to this program will be listed Each participant will be enshycouraged to make annual contribushytions to the trust fund

Further Information

For further information on WHOshyPES or GCDPP contact Dr Zaim Morteza WHO-PES CTD World Health Organ ization 1211 Geneva 27 Switzerland E-mail zaimmwhoch

Nlir smiddotMulla is a Profes-sor with the Deparfrilent of ~nt-oshy_mologyUniverslty at califor middot -nia Riversidemiddot CA92521 middot _ middot middot

-

middotMulla= Receives -middot

Recognition Awar(j _

Mir S Mulla Professor of Entoshymology Department of Entomolshyogy University of California Rivershyside CA was presented the Scishyence Society of Thailand~ Meritoshyrious Recognition Award by the Thailand Minister of Science and Technology last October

Mulla an authority on insects of medical and public health imporshytance was cited for his efforts and leadership in organizing the First International Symposium on Biopesticides convened at Naresuan University in Thailand This symposium attended by some 300 participants from 20 countries covered biodiversity safety toxicshyity efficacy and proper use of biopesticides based on natural products and pathogenic organshyisms The proceedings of this first symposium amounting to 300 pages will be published soon

Mulla informs us that the 2nd International Symposium on Biopesticides will be held in late October 1998 on Langkawi Island off the coast of Malaysia Anyone interested in receiving further inforshymation regarding the proceedings or the second symposium should contact Dr Mulla at tel (909) 787-5818 fax (909) 787-4210 and eshymail mulla mailucredu

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Notice Psotophora middotgtcyaneseens collect~d middotin Aiachua County FL

- ~

and 9 pupae of this species were collected by the author from a sunshylit small (ca 2 m diam and 20 em deep) grass-lined pool filled with rainwater at Gainesville Florida

a common identification number with their 41h instar larval and pupal exuviae On subsequent visits to the site no additional Ps cyanescens were collected

Psorophora cyanescens (Coquillett) previously has been reported in Florida from the followshying counties Bay Duval Escambia Gadsden Hillsborough Jackson Leon Okaloosa Suwannee and Union (HT Evans Florida Mosquito Control Handbook 1994) On 26 May 1997 one 4h instar larva

Also collected from the pool were numerous larvae and pupae of Psorophora columbiae (Dyar and Knab) Aedes vexans (Meigen) and Culex salinarius Coquillett and 17 4h instar larvae of Psorophora ciliata (Fabricus) All immatures were individually reared and the resulting adults were linked by

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Page 13: Wing Beats Volume 8 Number 3wingbeats.floridamosquito.org/Wingbeats/pdfs/Vol8No3.pdf · 2014. 4. 11. · Stan Cope, Norfolk, VA Betsy Field, Vero Beach, FL John Gamble, New Smyrna

or a few briquets into isolated small pools where placement is not a critishycal issue both in terms of cost and eHiciency Applicators may also use a slingshot The Arrow Gun works very well for applying pellet ground corn cob and other granushylar carrier formulations in large amounts In order for the equipment to be used properly as with any application equipment it must first be calibrated

Figure 1 shows release rates for Altosid Briquets Altosid XR Brishyquets and Altosid Pellets These curves are adapted from an article by Dr Doug Ross et a called Methoprene concentrations in freshwater microcosms treated with sustained-release Altosid formulashytions (Mosquito News 1994 Vol 1 0(2 pt 1 pp 202-21 0 They are indirect measures of release rates derived by measuring the concenshytration of active ingredients in the water Notice that the AI is not reshyleased uniformly throughout the active life of the formulations Conshysider this when you are larviciding We suspect that most solid larvishycides have characteristic release rate curves but we are not aware of any published descriptions If we could tap into the EPAs confidenshytial data files we might be able to find out more about this topic

In a large rectangular area usshying a 1 briquet1 00 sq ft applicashytion rate if briquets are placed in the recommended 1 0 foot intervals in even rows the maximum (diagoshynal) distance between two adjacent briquets is a little over 14 feet Imagshyine a square with a briquet in each corner and mosquito larvae in the center a little over 7 ft from each briquet To decrease the maximum diagonal distance between briquets to 1 0 feet while still placing briquets every 10 feet in rows stagger the rows so the briquets in the second row are between the briquets in the first row Materials science tells us this is the most efficient spacing scheme We recommend practic-

ing briquet placement in a mowed yard prior to actual field work This will allow you to get your spacing right Monroe County (Florida) Mosquito Control District field pershysonnel typically hand-apply over 20000 Altosid Briquets every year by walking their breeding sites with a 2 gallon pail full of product

STAGGERED X X X

X X X

X X X

ABREAST

X X X

X X X

X X X

Another problematic situation occurs when treating a narrow ditch If a ditch averages 8 feet wide you would apply a briquet every 125 linear feet to get the 1 briquet per 1 00 sq feet If the ditch averaged 2 feet wide you would apply one briquet for every 50 linshyear feet In the case of a narrow ditch and in the absence of any external mixing forces such as wind or water flow the concentrashytion will be higher than expected adjacent to the briquet because the toxicants cannot disperse equal distances in all directions In addition the concentration of AI at the center point between adjacent briquets may be below the lethal dose Exposure of mosquito larvae to sublethal doses may result in resistance to the AI If the water is flowing the problem is solved but you may get accelerated briquet erosion Altosid Briquet labels provide instructions for treatshyments in moving water

East Volusia Mosquito Control District (Florida) developed a method to apply a whole seasons worth of Altosid (30-day) Briquets

-ltgt-BRIQUETS

10 15 20 25 30 35

-0- XR BRIQUETS

0 ~2 02 022 02 02 02 0 ()~-~~ Q~-oCltJliID~ middot Ult1=r-n0~n~erJl -U~U=()

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DAYS AFTER APPLICATION

Figure 1

Release rates for Altosid Briquets altosid XR Briquits and Altosid Pellets

Fall1997 15

at one time They cap a 6-8 inch section of 1-inch ID PVC pipe atshytach this (cap-side up) to an alumishynum stake (packing tape works great) and drill a 38 inch hole through it at the other end Brishyquets are inserted into the cylinder sometimes with color coded poker chips as spacers and a wire is run through the hole (or the stake is bent inward) to prevent the briquets from falling out prematurely The stake is driven into the bottom at the breeding site As the breeding site is flooded the bottom briquet erodes away releasing AI Trapped air prevents water from reaching the other briquets Another briquet falls down to take its place when it is about gone A field inspector can count poker chips to see how many Altosid Briquets have been used up

When bottom contours are highly irregular and the water depth is shallow and decreasing you may

not want to use briquet formulations at all Consider whether or not the briquet will ever be isolated from any part of the intended treatment area during its active life If so larshyvae may escape control efforts The amount of carrier material used can dictate the quality of control you achieve and is a very important consideration Unless we formulate our own pesticides we must work with a fixed amount of toxicant per pound as determined b~middot the manushyfacturer for an average situation Wouldnt it be nice to have a series of dry formulations based on the same AI that best fit different situashytions

Consider Figure 2 for a moment It shows the approximate average number of particles per square yard for four different carriers This graph is the result of investigations by students attending the weekshylong Florida Mosquito Control Asshysociation Dodd Short Courses on

Larviciding during 1996 and 1997 plus the work of Pasco CMCDs John Schaediger who washed and counted thousands of grains of sand Notice that 6 pounds of Biodac1200 contain about the same number of particles as 1 0 lbs of 1 014 grit corn cob If you have determined that 1 0 lbs of Vectobac CG (which uses 1 014 grit corn cob) is the correct application rate for you then perhaps 6 pounds of Biodac 1200 formulated with the same amount of Bti will do the same job and save you 40 in weight At these rates they both contain approximately the same number of carrier particles per pound The weight difference could increase the economics of aerial application where the lower weight translates into more acres per payshyload per flight

We apply 75 lbs of granulated 1 014 grit corncob per acre as our base rate This includes both in-

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Fall1997

4

daC 1200 BlO

1014 corncob

5 6

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7

58 corncob

8 9 I

10

house mixes of blank granules with active ingredients and commercially finished products The 75 lbs is not just a figure that has been pulled out of the sky but one that many trials and observations have shown to be necessary to get good coverage with a variety of bottom contours and vegetation types You may need a different base rate When field personnel are conshyfronted with heavy detritus or vegshyetation aggregated larvae or a preponderance of late in star larvae they can then increase their applishycation by slowing down their pace or narrowing the swath to raise the dosage of pesticide (remembering to stay within the maximum labeled rate)

Whatever the formulation the proper application is critical to the efficiency and effectiveness of your program Larvicide labels comshymonly include only very general guidelines for application techshyniques or equipment selection This latitude allows applicators and technical staffs to choose a system that works best for their circumshystances A granular label notes the material should be applied unishyformly in conventional aerial and ground equipment

Equipment Calibration

Equipment calibrations are imshyportant for the effectiveness of your operation Consistency is born out of practice on top of more practice Failures of larvicides are often atshytributed to missed areas caused by poor applications Calibrating flows on dry application equipment is done either by timing how long it takes for a known amount to pass through the unit or by collecting all the material blown from the nozzle for a fixed period of time and then weighing it Either should be done by two people one that handles the machine and one that does the timshying The collection method retains

the material for subsequent tests but may restrict the flow on certain machines Machines with powershyful air blasts can only be checked by timing the discharge of a known quantity

Knowledge of the flow rate and of factors affecting it are critical to calibration The most common powshyered ground equipment used for dry applications is the gasolineshyengined backpack mistblower duster The units are capable of providing even coverage good throw and are simple to use They typically broadcast granules in a 40-60 ft swath width with the operator walking at 1-3 miles per hour This translates to 5-20 acres per hour of spray time Several things can be done to change the flow rate with the nozzle orifice or disc as the primary determinate Changing the pressure will also change the flow but to a much lesser degree and it has other side effects Some power dusters have movable grates that regulate flow over the normal opshyerating range Some brands have a series of replaceable orifice discs that allow discharge rate changes in small steps Blower speed also affects the throw but that should have marginal effect on the disshycharge rate

Other ground equipment that may be used include crank slinger seeders horn seeders and modishyfied ULV equipment (eg Arrow Guns mentioned above) The flow of spinning disc spreaders or othshyers with a mechanical agitator may be somewhat affected by the opshyerational speed Horn seeders which have about a 20 ft swath width when applying Bti granules are often used by our field personshynel to treat small sites They have replaced the Dipper and Bucket method where an applicator fills a dipper from a bucket of granules and then carefully and evenly broadcasts them

An Example

Assume you have determined that you can comfortably apply B ti corncob granules in 50ft swaths at 2 mph (121 acreshour) using a duster and you want to apply them at 25 to 10 lbsacre To get proper coverage in typical vegetation you will use 5 lbsacre and when conshyfronted with adverse conditions you may double or in this case with a maximum label rate of 20 lbs acre quadruple the application to get the proper dosage of pesticide to the insect

Fill the hopper with granules making sure not to get any pieces of paper or other debris mixed into the product If the unit is equipped with an air agitation system make sure that it is operational Start the engine and make sure that the granules are free flowing through the nozzle If the unit is equipped with an adjustable gate style regushylator center it for an initial trial Close the flow control For collectshying granules you need a nylon stocking and a scale that measures to ounces or grams Place the stocking over the discharge tube and secure it with a rubber band The stocking should be supported so it wont pinch the air flow off Run the blower up to speed and then open the flow valve as you start timing Have the operator open the valve as the stop watch is started

Because of the very low flows (small quantities) of granules needed take a sample over a given period in the 3-5 minute range Shut the flow off as the timer notes the end of the period Pull the colshylection into the bottom of the stockshying and remove it from the nozzle Place another stocking on the duster and collect a second sample and then a third sample Collect at least three samples weigh each and average the results Be sure to subtract the weight of the stock-

Fall1997 17

ing before calculating the average If one sample volume is much higher or lower than the other two samples then replace the odd sample with a new one Assume you collected three 5-minute samples that weigh 61 64 and 59 oz each The average is 61 3 oz5 min or 1227 ozmin

Practice

Swath tests are best done inishytially using a paved surface such as a parking lot for a practice spray plot because the granules are easshyily seen Blank granules for pracshytice and for your own formulating may be purchased from The Andersons (800-537-3370) and other sources Get 1014 grit if you use Vectobac CG or an equivalent and 58 grit if you use Vectobac G or an equivalent Fill the hopper with a weighed quantity of granules and walk over the plot trying to cover the entire area with an even dosage To determine how much was applied empty the hopper and weigh the material remaining Afshyter a good distribution has been

mast~red move onto a measured field where the terrain is more diffishycult and continue practicing Proshygressively move into more difficult areas as your skill level increases You can get to the point where you know what 5 lbsacre looks like in any habitat and then when you apshyply the real stuff you will know you have done so properly

Assume your practice spray plot is 18 of an acre Therefore to get the proper dose you want to apply 18 of 5 lbs (0625 lbs or 10 oz) to the plot You earlier calculated that your duster is putting out approxishymately 1225 oz per min The calshyculated time to put out the 1 0 oz required to treat the test plot is 082 minutes or49 seconds [determined by dividing 10 ounces by 1225] You also determined that you can treat 121 acreshour at a 2 mph walking speed At that speed you can treat about 16 of an acre in 49 seconds You have three choices to adequately cover your 18 acre practice plot 1) You can walk at your normal speed and apply at a rate slightly higher than 5 lbsacre 2) you can walk a little slower and

BVA

apply at the normal rate or 3) you can decrease the flow rate a bit to achieve the target rate at your norshymal application speed The choice is yours

If you have any questions feel free to contact the authors at Pasco County Mosquito Control District 2308 Marathon Road Odessa Fl 33556 Phone 813-376-4568 Fax 813-376-470 Email pcmcdgtenet

~

Doug middot wassmer _ _Jim middot _ Robinson middotand Jack-Frerich middotmiddot middot are-middot vyith the pascomiddotmiddotc_qun~y middot Mosquito Control bistr_ict middot

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In order to control or eradicate vector-borne disease the world Health Organization launched a substantial program of research on the screening evaluation and deshyvelopment of pesticides for the conshytrol of disease vectors and human pests in the early 1960s This proshygram of research and development continued into the 1970s Various collaboration centers and WHO regional research laboratories were involved in this multiphasic evaluashytion and research program This program was later designated as WHO-PES (WHO Pesticides Evaluation Scheme) which inshycluded laboratory screening of new pesticides and their formulations and finally small-scale and largeshyscale village field trials where effishycacy safety and feasibility of applishycation were studied Additionally whenever possible impact on the level of endemic diseases was also assessed The 41

h phase of this scheme addressed specification of pesticides and their formulations to be used in vector control

The WHO-PES program evenshytually came to a halt in the eighties and with restructuring of the vector Biology and Control Division in WHO this program came to a grinding halt It soon became apshyparent that member countries carshyrying on substantial vector control programs especially mosquito conshytrol operations soon reached the stage when appropriate tools and strategies for use in operational programs became quite scarce Member countries put forward deshymands for the development of more effective and safer chemical and

20 Fa111997

biological control measures To reshyspond to this global demand the Division of Control of Tropical Disshyeases (CTD) at WHO reinvigorated the WHO-PES Program by holding an informal consultation on the Evaluation and Testing of Insectishycides on October 1996 where I was asked to serve as the Chairperson of the consultation Copies of the report of this Consultation can be obtained from Dr Zaim Morteza whose address appears at the end of this article

As a result of the Informal Conshysultation and other discussions held at WHO regarding the future need for public health pesticides CTD recently (1996) launched the GCDPP program This is indeed a crucial program which requires colshylaboration among national and inshyternational agencies research inshystitutions industry and regulatory agencies The main objectives elshyements and scope of this program are briefly discussed below

The main objectives of the GCDPP program are

bull To facilitate the search for alternative pesticides including mishycrobial pesticides as well as applishycation methodologies

bull To advise on the relative priority of activities within the manshydate of GCDPP

bull To advise on issues related to the development and use of pesshyticides and application equipment within the context of WHOs global disease control strategies

bull To promote harmonization of activities related to pesticide deshyvelopment and safe use

bull To promote and encourage the highest quality of work through appropriate resource mobilization

bull GCDPP will serve as an advisory group to CTDWHOPES in matters of pesticide developshyment safe and proper use and apshyplication equipment

Membership and Meetings

A number of agencies organishyzations and manufacturers of pesshyticides and application equipment will become members of GCDPP as well as foundations and WHO Collaborating Centers Other groups and -organizations involved in manufacturing pest manageshyment and crop protection will also be invited Attempts will be made to maximize representation but at the same time ensure appropriate balance In addition to the above distinguished scientists and direcshytors of WHO Regional Offices may also be invited to attend the meetshyings of GCDPP

GCDPP will provide a forum for the exchange of technical informashytion and oversee the WHO-PES biennial plan and collaboration with other organizations and institutions GCDPP will meet every other year in Geneva Switzerland Informal consultation meetings on specific topics will be convened as the need arises CTD will be responsible for the organization of such meetings

continued on page 25

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How many of you know the names Norma Jean Baker Cornelius Magillicutty dichloroshydiphenyl-trichloro-ethane Haliaeetus leucocephalus and its distant relative Taxodium distichum How about Aedes albopictus Well if you are willing to bet $100 you know all six withshyout looking at the answers then you are either very bright very old well read or have too much time on your hands If you know only one I hope its the Asian tiger mosquito What if for the remaining five I gave you the hints of Some Like it Hot baseball legend insecticide whiteshyheaded bird and tree with knees The older ones amongst us and thats getting to be a higher percentshyage each year should recognize Marilyn Monroe and Connie Mack for the first two All of you should be ashamed of yourself if you dont recognized DDT The last two reshylated by name only are Bald Eagle and Bald Cypress If you got both of those you are probably psychic and also know what the point of this article is

And what is the point of this arshyticle the need for common names for mosquitoes Most of us know the birds plants and mammals by their common names Why then must we for the most part use scishyentific names for mosquitoes There are other names that would be more meaningful easier to spell and certainly easier to pronounce Ill bet my $100 right now that 50 of us couldnt spell Toxorhynchites or taeniorhynchus in a spelling bee Thank goodness Aedes abopictus had a catchy common name when

- bull bull -middot ~ bull middot- ~ bull ~ bull

it became established in the US in 1985 Never mind that the common name conjured up all sorts of wrong impressions Asian tiger mosquito was a lot easier for the public and press and I dare say most mosshyquito control practitioners to undershystand and remember Also our friends at the Entomological Socishyety had the accepted common name as Forest Day mosquito but to their credit they changed it to what every one calls it the Asian tiger mosquito

So despite their scientific bent scientists can be influenced to change their minds If common names and abbreviations too didnt have a purpose that is to help us to communicate then we would all be saying too many long boring and confusing sentences Consider the following For years Cornelius Magillicutty sprayed his back yard with dichloro-diphenylshytrichloro-ethane for Aedes abopictus and then years later with Norma Jean Baker at his side watched the thin-shelled eggs of Haliaeetus leucocephalus drop out of 500-year old Taxodium distichum that he loved so much Yawn

Its that kind of phraseology that keeps people including some scishyentists from reading the scientific literature When trying to commushynicate any word or phrase that your listener doesnt know or understand tends to confuse them annoy them or make them feel inferior and that often makes them stop listening Communicating with the public has become a major mosquito control activity in recent years When com-

municating with the public scientific terms and jargon are neither desirshyable or necessary Mosquito control activities can be explained in very simple terms We could use the term Bacillus thuringiensis var israeensis instead of BTl but how many of us do Telling the average person SLE is an arbovirus doesnt give them any more information than telling them its a virus

And whats with this italics stuff for scientific names Ask people (inshycluding you perhaps) why we italishycize scientific names and most will probably guess that its to emphashysis the term Wrong If you care why look it up Lets forget it from now on OK If you cant write Culex quinquefasciatus without italics then consider my alternative-comshymon names that dont need to be italicized

The Entomological Society of America has a committee that conshysiders and usually rejects proshyposed official common names for insects There are only 14 mosshyquitoes on that list and I dare say most of us dont use most of them The problem with this list is that it was developed by scientists and everyone knows that all scientists are mad not just those in the movshyies Scientists want to do things in a scientific manner-logical meshythodical and precise Just because the entomological journals will only let you use accepted common names in their pages doesnt mean we cant use other common names in presentations and io print and we should

Fall1997 23

What we need is a list of comshymon names that the average mosshyquito control practitioner uses No one that anyone takes seriously will say they found some Culex pipiens quinquefasciatus (note no italics) in a polluted pond Most will say quinks Sure we can capitalize Quinks if it makes you feel better it does me So why are we afraid to write Quinks in our reports or say Quinks in formal talks Most people probably dont say quinks (see I dont insist on capitalization) because they think it makes them sound unprofessional Quinks is a distinctive short easy to rememshyber and fun to say name it has a beat that you can dance to and I give it a 99 Does anyone you know call quinks the southern house mosquito the accepted common name How about northern house mosquito for pipiens

Taenies or taenys or whatshyever spelling you want to use is easily recognized by east and south coast mosquito people as the comshymon name for Aedes taeniorhynchus one of the saltmarsh mosquitoes Again its a distinctive short easy to rememshyber and fun name It also describes the size of the species somewhat small or teeny-a bonus And who doesnt use Tox as the common name for our other spelling bee example

We dont hesitate to use comshymon names for a group of mosquishytoes that breed in a particular habishytat In addition to saltmarsh mosshyquitoes we refer to floodwater mosquitoes (which incidently also describes many saltmarsh mosquishytoes) tree hole mosquitoes dirty water mosquitoes grey water mosshyquitoes freshwater mosquitoes container-breeding mosquitoes pasture mosquitoes rock hole mosshyquitoes crab hole mosquitoes and on and on These habitat names are not mutually exclusive For exshyample pasture mosquitoes are also floodwater mosquitoes and fresh-

24 Fall1997

water mosquitoes By the way the translation of floodwater mosquito according to the Entomological Soshyciety is Aedes sticticus What Habitat names are also convenient for discussions among people from different geographic areas For example nature tends to give the same qualities to mosquitoes that breed in tree holes regardless of whether they are tree holes in Calishyfornia Virginia Queensland or Borneo From an operational mosshyquito control standpoint knowing the habitat of the mosquito can be more informative than knowing its scientific name

So lets consider some common names of species that we might use One common pest and potenshytial vector species that needs a common name is Coquillettidia perturbans (I think Ive weaned myself from italics) the aggressive biter whose larvae attach to the roots of aquatic plants particularly cattails (I could have said Typha species) Cattail mosquito is a natural even though larvae may attach to a variety of plants Another name could be the salt and pepshyper mosquito or another name taken from its scientific name could be the perturbing mosquito

How about the Anopheles The accepted common name for Anopheles quadrimaculatus is the common malaria mosquito This may have been accurate when malaria was a problem in this counshytry but now neither malaria nor this mosquito is common in this counshytry Im sure most of our hypothetishycal naming committee made up of operational mosquito controllers would call them quads

We have already dealt with Quinks Another obvious common name for another Culex Cx salinarius is sally or sallys or sallies Culex restuans is a little more tricky but how about rusty Rusty is suggestive of the color of the mosquito and it is similar to

resty a name that just doesnt sound right to me

Aedes vexans a common floodshywater mosquito in much of the US needs a common name The acshycepted common name vexans mosquito would be OK if most people know what vexing means And if they do why not call it the vexing mosquito Calling Aedes aegypti in the US by its accepted name the yellowfever mosquito is misleading Yellow fever has been absent from the US since right after the turn of the century Aegypti or gyps is often used by field and lab workers so why not adopt those terms

I could go on and on but Im more interested in what you think If you will send me your common names (keep it clean please) for any species you are familiar with Ill be happy to compile them and report back in a future article in Wing Beats (Theres that italics again different reason) If they appear in Wing Beats maybe just maybe we can call them official common names You can fax me at 561-778-7204 or E-mail me at cdmognvifas ufledu By the way you can address the message to Charlie Chas or Char The only person I insist call me doctor is my ex-wife and I would rather she didnt call me at all

-C_h~ulie M~rtis middot is an Assoshy _ciate middotPi~fesso( at the Unishy versity ~f floridas Medical Eiitomology Laboratory middot hi middot middot

Verq Beach Fiorida~

continued from page 20

providing support for report prepashyration and other documents and perform secretarial functions

Funding

In order to advance the objecshytives of GCDPP a stable source of funding will be necessary WHO CTD (WHO-Division of Control of Tropical Diseases) will establish and administer a trust fund which will be designated as GCDPP-Trust Fund which will be administered according to the WHO financial rules regulations and practices

The trust fund will be used to convene meetings production and dissemination of documents exshychange and dissemination of inforshymation on the need for public health pesticides and equipment and for activities which will promote the development and use of alternative safe compounds or application equipment

1James of organizations institushytions foundations manufacturers and individuals participating and contributing to this program will be listed Each participant will be enshycouraged to make annual contribushytions to the trust fund

Further Information

For further information on WHOshyPES or GCDPP contact Dr Zaim Morteza WHO-PES CTD World Health Organ ization 1211 Geneva 27 Switzerland E-mail zaimmwhoch

Nlir smiddotMulla is a Profes-sor with the Deparfrilent of ~nt-oshy_mologyUniverslty at califor middot -nia Riversidemiddot CA92521 middot _ middot middot

-

middotMulla= Receives -middot

Recognition Awar(j _

Mir S Mulla Professor of Entoshymology Department of Entomolshyogy University of California Rivershyside CA was presented the Scishyence Society of Thailand~ Meritoshyrious Recognition Award by the Thailand Minister of Science and Technology last October

Mulla an authority on insects of medical and public health imporshytance was cited for his efforts and leadership in organizing the First International Symposium on Biopesticides convened at Naresuan University in Thailand This symposium attended by some 300 participants from 20 countries covered biodiversity safety toxicshyity efficacy and proper use of biopesticides based on natural products and pathogenic organshyisms The proceedings of this first symposium amounting to 300 pages will be published soon

Mulla informs us that the 2nd International Symposium on Biopesticides will be held in late October 1998 on Langkawi Island off the coast of Malaysia Anyone interested in receiving further inforshymation regarding the proceedings or the second symposium should contact Dr Mulla at tel (909) 787-5818 fax (909) 787-4210 and eshymail mulla mailucredu

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Notice Psotophora middotgtcyaneseens collect~d middotin Aiachua County FL

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and 9 pupae of this species were collected by the author from a sunshylit small (ca 2 m diam and 20 em deep) grass-lined pool filled with rainwater at Gainesville Florida

a common identification number with their 41h instar larval and pupal exuviae On subsequent visits to the site no additional Ps cyanescens were collected

Psorophora cyanescens (Coquillett) previously has been reported in Florida from the followshying counties Bay Duval Escambia Gadsden Hillsborough Jackson Leon Okaloosa Suwannee and Union (HT Evans Florida Mosquito Control Handbook 1994) On 26 May 1997 one 4h instar larva

Also collected from the pool were numerous larvae and pupae of Psorophora columbiae (Dyar and Knab) Aedes vexans (Meigen) and Culex salinarius Coquillett and 17 4h instar larvae of Psorophora ciliata (Fabricus) All immatures were individually reared and the resulting adults were linked by

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Date completed

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Page 14: Wing Beats Volume 8 Number 3wingbeats.floridamosquito.org/Wingbeats/pdfs/Vol8No3.pdf · 2014. 4. 11. · Stan Cope, Norfolk, VA Betsy Field, Vero Beach, FL John Gamble, New Smyrna

at one time They cap a 6-8 inch section of 1-inch ID PVC pipe atshytach this (cap-side up) to an alumishynum stake (packing tape works great) and drill a 38 inch hole through it at the other end Brishyquets are inserted into the cylinder sometimes with color coded poker chips as spacers and a wire is run through the hole (or the stake is bent inward) to prevent the briquets from falling out prematurely The stake is driven into the bottom at the breeding site As the breeding site is flooded the bottom briquet erodes away releasing AI Trapped air prevents water from reaching the other briquets Another briquet falls down to take its place when it is about gone A field inspector can count poker chips to see how many Altosid Briquets have been used up

When bottom contours are highly irregular and the water depth is shallow and decreasing you may

not want to use briquet formulations at all Consider whether or not the briquet will ever be isolated from any part of the intended treatment area during its active life If so larshyvae may escape control efforts The amount of carrier material used can dictate the quality of control you achieve and is a very important consideration Unless we formulate our own pesticides we must work with a fixed amount of toxicant per pound as determined b~middot the manushyfacturer for an average situation Wouldnt it be nice to have a series of dry formulations based on the same AI that best fit different situashytions

Consider Figure 2 for a moment It shows the approximate average number of particles per square yard for four different carriers This graph is the result of investigations by students attending the weekshylong Florida Mosquito Control Asshysociation Dodd Short Courses on

Larviciding during 1996 and 1997 plus the work of Pasco CMCDs John Schaediger who washed and counted thousands of grains of sand Notice that 6 pounds of Biodac1200 contain about the same number of particles as 1 0 lbs of 1 014 grit corn cob If you have determined that 1 0 lbs of Vectobac CG (which uses 1 014 grit corn cob) is the correct application rate for you then perhaps 6 pounds of Biodac 1200 formulated with the same amount of Bti will do the same job and save you 40 in weight At these rates they both contain approximately the same number of carrier particles per pound The weight difference could increase the economics of aerial application where the lower weight translates into more acres per payshyload per flight

We apply 75 lbs of granulated 1 014 grit corncob per acre as our base rate This includes both in-

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Fall1997

4

daC 1200 BlO

1014 corncob

5 6

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7

58 corncob

8 9 I

10

house mixes of blank granules with active ingredients and commercially finished products The 75 lbs is not just a figure that has been pulled out of the sky but one that many trials and observations have shown to be necessary to get good coverage with a variety of bottom contours and vegetation types You may need a different base rate When field personnel are conshyfronted with heavy detritus or vegshyetation aggregated larvae or a preponderance of late in star larvae they can then increase their applishycation by slowing down their pace or narrowing the swath to raise the dosage of pesticide (remembering to stay within the maximum labeled rate)

Whatever the formulation the proper application is critical to the efficiency and effectiveness of your program Larvicide labels comshymonly include only very general guidelines for application techshyniques or equipment selection This latitude allows applicators and technical staffs to choose a system that works best for their circumshystances A granular label notes the material should be applied unishyformly in conventional aerial and ground equipment

Equipment Calibration

Equipment calibrations are imshyportant for the effectiveness of your operation Consistency is born out of practice on top of more practice Failures of larvicides are often atshytributed to missed areas caused by poor applications Calibrating flows on dry application equipment is done either by timing how long it takes for a known amount to pass through the unit or by collecting all the material blown from the nozzle for a fixed period of time and then weighing it Either should be done by two people one that handles the machine and one that does the timshying The collection method retains

the material for subsequent tests but may restrict the flow on certain machines Machines with powershyful air blasts can only be checked by timing the discharge of a known quantity

Knowledge of the flow rate and of factors affecting it are critical to calibration The most common powshyered ground equipment used for dry applications is the gasolineshyengined backpack mistblower duster The units are capable of providing even coverage good throw and are simple to use They typically broadcast granules in a 40-60 ft swath width with the operator walking at 1-3 miles per hour This translates to 5-20 acres per hour of spray time Several things can be done to change the flow rate with the nozzle orifice or disc as the primary determinate Changing the pressure will also change the flow but to a much lesser degree and it has other side effects Some power dusters have movable grates that regulate flow over the normal opshyerating range Some brands have a series of replaceable orifice discs that allow discharge rate changes in small steps Blower speed also affects the throw but that should have marginal effect on the disshycharge rate

Other ground equipment that may be used include crank slinger seeders horn seeders and modishyfied ULV equipment (eg Arrow Guns mentioned above) The flow of spinning disc spreaders or othshyers with a mechanical agitator may be somewhat affected by the opshyerational speed Horn seeders which have about a 20 ft swath width when applying Bti granules are often used by our field personshynel to treat small sites They have replaced the Dipper and Bucket method where an applicator fills a dipper from a bucket of granules and then carefully and evenly broadcasts them

An Example

Assume you have determined that you can comfortably apply B ti corncob granules in 50ft swaths at 2 mph (121 acreshour) using a duster and you want to apply them at 25 to 10 lbsacre To get proper coverage in typical vegetation you will use 5 lbsacre and when conshyfronted with adverse conditions you may double or in this case with a maximum label rate of 20 lbs acre quadruple the application to get the proper dosage of pesticide to the insect

Fill the hopper with granules making sure not to get any pieces of paper or other debris mixed into the product If the unit is equipped with an air agitation system make sure that it is operational Start the engine and make sure that the granules are free flowing through the nozzle If the unit is equipped with an adjustable gate style regushylator center it for an initial trial Close the flow control For collectshying granules you need a nylon stocking and a scale that measures to ounces or grams Place the stocking over the discharge tube and secure it with a rubber band The stocking should be supported so it wont pinch the air flow off Run the blower up to speed and then open the flow valve as you start timing Have the operator open the valve as the stop watch is started

Because of the very low flows (small quantities) of granules needed take a sample over a given period in the 3-5 minute range Shut the flow off as the timer notes the end of the period Pull the colshylection into the bottom of the stockshying and remove it from the nozzle Place another stocking on the duster and collect a second sample and then a third sample Collect at least three samples weigh each and average the results Be sure to subtract the weight of the stock-

Fall1997 17

ing before calculating the average If one sample volume is much higher or lower than the other two samples then replace the odd sample with a new one Assume you collected three 5-minute samples that weigh 61 64 and 59 oz each The average is 61 3 oz5 min or 1227 ozmin

Practice

Swath tests are best done inishytially using a paved surface such as a parking lot for a practice spray plot because the granules are easshyily seen Blank granules for pracshytice and for your own formulating may be purchased from The Andersons (800-537-3370) and other sources Get 1014 grit if you use Vectobac CG or an equivalent and 58 grit if you use Vectobac G or an equivalent Fill the hopper with a weighed quantity of granules and walk over the plot trying to cover the entire area with an even dosage To determine how much was applied empty the hopper and weigh the material remaining Afshyter a good distribution has been

mast~red move onto a measured field where the terrain is more diffishycult and continue practicing Proshygressively move into more difficult areas as your skill level increases You can get to the point where you know what 5 lbsacre looks like in any habitat and then when you apshyply the real stuff you will know you have done so properly

Assume your practice spray plot is 18 of an acre Therefore to get the proper dose you want to apply 18 of 5 lbs (0625 lbs or 10 oz) to the plot You earlier calculated that your duster is putting out approxishymately 1225 oz per min The calshyculated time to put out the 1 0 oz required to treat the test plot is 082 minutes or49 seconds [determined by dividing 10 ounces by 1225] You also determined that you can treat 121 acreshour at a 2 mph walking speed At that speed you can treat about 16 of an acre in 49 seconds You have three choices to adequately cover your 18 acre practice plot 1) You can walk at your normal speed and apply at a rate slightly higher than 5 lbsacre 2) you can walk a little slower and

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apply at the normal rate or 3) you can decrease the flow rate a bit to achieve the target rate at your norshymal application speed The choice is yours

If you have any questions feel free to contact the authors at Pasco County Mosquito Control District 2308 Marathon Road Odessa Fl 33556 Phone 813-376-4568 Fax 813-376-470 Email pcmcdgtenet

~

Doug middot wassmer _ _Jim middot _ Robinson middotand Jack-Frerich middotmiddot middot are-middot vyith the pascomiddotmiddotc_qun~y middot Mosquito Control bistr_ict middot

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In order to control or eradicate vector-borne disease the world Health Organization launched a substantial program of research on the screening evaluation and deshyvelopment of pesticides for the conshytrol of disease vectors and human pests in the early 1960s This proshygram of research and development continued into the 1970s Various collaboration centers and WHO regional research laboratories were involved in this multiphasic evaluashytion and research program This program was later designated as WHO-PES (WHO Pesticides Evaluation Scheme) which inshycluded laboratory screening of new pesticides and their formulations and finally small-scale and largeshyscale village field trials where effishycacy safety and feasibility of applishycation were studied Additionally whenever possible impact on the level of endemic diseases was also assessed The 41

h phase of this scheme addressed specification of pesticides and their formulations to be used in vector control

The WHO-PES program evenshytually came to a halt in the eighties and with restructuring of the vector Biology and Control Division in WHO this program came to a grinding halt It soon became apshyparent that member countries carshyrying on substantial vector control programs especially mosquito conshytrol operations soon reached the stage when appropriate tools and strategies for use in operational programs became quite scarce Member countries put forward deshymands for the development of more effective and safer chemical and

20 Fa111997

biological control measures To reshyspond to this global demand the Division of Control of Tropical Disshyeases (CTD) at WHO reinvigorated the WHO-PES Program by holding an informal consultation on the Evaluation and Testing of Insectishycides on October 1996 where I was asked to serve as the Chairperson of the consultation Copies of the report of this Consultation can be obtained from Dr Zaim Morteza whose address appears at the end of this article

As a result of the Informal Conshysultation and other discussions held at WHO regarding the future need for public health pesticides CTD recently (1996) launched the GCDPP program This is indeed a crucial program which requires colshylaboration among national and inshyternational agencies research inshystitutions industry and regulatory agencies The main objectives elshyements and scope of this program are briefly discussed below

The main objectives of the GCDPP program are

bull To facilitate the search for alternative pesticides including mishycrobial pesticides as well as applishycation methodologies

bull To advise on the relative priority of activities within the manshydate of GCDPP

bull To advise on issues related to the development and use of pesshyticides and application equipment within the context of WHOs global disease control strategies

bull To promote harmonization of activities related to pesticide deshyvelopment and safe use

bull To promote and encourage the highest quality of work through appropriate resource mobilization

bull GCDPP will serve as an advisory group to CTDWHOPES in matters of pesticide developshyment safe and proper use and apshyplication equipment

Membership and Meetings

A number of agencies organishyzations and manufacturers of pesshyticides and application equipment will become members of GCDPP as well as foundations and WHO Collaborating Centers Other groups and -organizations involved in manufacturing pest manageshyment and crop protection will also be invited Attempts will be made to maximize representation but at the same time ensure appropriate balance In addition to the above distinguished scientists and direcshytors of WHO Regional Offices may also be invited to attend the meetshyings of GCDPP

GCDPP will provide a forum for the exchange of technical informashytion and oversee the WHO-PES biennial plan and collaboration with other organizations and institutions GCDPP will meet every other year in Geneva Switzerland Informal consultation meetings on specific topics will be convened as the need arises CTD will be responsible for the organization of such meetings

continued on page 25

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How many of you know the names Norma Jean Baker Cornelius Magillicutty dichloroshydiphenyl-trichloro-ethane Haliaeetus leucocephalus and its distant relative Taxodium distichum How about Aedes albopictus Well if you are willing to bet $100 you know all six withshyout looking at the answers then you are either very bright very old well read or have too much time on your hands If you know only one I hope its the Asian tiger mosquito What if for the remaining five I gave you the hints of Some Like it Hot baseball legend insecticide whiteshyheaded bird and tree with knees The older ones amongst us and thats getting to be a higher percentshyage each year should recognize Marilyn Monroe and Connie Mack for the first two All of you should be ashamed of yourself if you dont recognized DDT The last two reshylated by name only are Bald Eagle and Bald Cypress If you got both of those you are probably psychic and also know what the point of this article is

And what is the point of this arshyticle the need for common names for mosquitoes Most of us know the birds plants and mammals by their common names Why then must we for the most part use scishyentific names for mosquitoes There are other names that would be more meaningful easier to spell and certainly easier to pronounce Ill bet my $100 right now that 50 of us couldnt spell Toxorhynchites or taeniorhynchus in a spelling bee Thank goodness Aedes abopictus had a catchy common name when

- bull bull -middot ~ bull middot- ~ bull ~ bull

it became established in the US in 1985 Never mind that the common name conjured up all sorts of wrong impressions Asian tiger mosquito was a lot easier for the public and press and I dare say most mosshyquito control practitioners to undershystand and remember Also our friends at the Entomological Socishyety had the accepted common name as Forest Day mosquito but to their credit they changed it to what every one calls it the Asian tiger mosquito

So despite their scientific bent scientists can be influenced to change their minds If common names and abbreviations too didnt have a purpose that is to help us to communicate then we would all be saying too many long boring and confusing sentences Consider the following For years Cornelius Magillicutty sprayed his back yard with dichloro-diphenylshytrichloro-ethane for Aedes abopictus and then years later with Norma Jean Baker at his side watched the thin-shelled eggs of Haliaeetus leucocephalus drop out of 500-year old Taxodium distichum that he loved so much Yawn

Its that kind of phraseology that keeps people including some scishyentists from reading the scientific literature When trying to commushynicate any word or phrase that your listener doesnt know or understand tends to confuse them annoy them or make them feel inferior and that often makes them stop listening Communicating with the public has become a major mosquito control activity in recent years When com-

municating with the public scientific terms and jargon are neither desirshyable or necessary Mosquito control activities can be explained in very simple terms We could use the term Bacillus thuringiensis var israeensis instead of BTl but how many of us do Telling the average person SLE is an arbovirus doesnt give them any more information than telling them its a virus

And whats with this italics stuff for scientific names Ask people (inshycluding you perhaps) why we italishycize scientific names and most will probably guess that its to emphashysis the term Wrong If you care why look it up Lets forget it from now on OK If you cant write Culex quinquefasciatus without italics then consider my alternative-comshymon names that dont need to be italicized

The Entomological Society of America has a committee that conshysiders and usually rejects proshyposed official common names for insects There are only 14 mosshyquitoes on that list and I dare say most of us dont use most of them The problem with this list is that it was developed by scientists and everyone knows that all scientists are mad not just those in the movshyies Scientists want to do things in a scientific manner-logical meshythodical and precise Just because the entomological journals will only let you use accepted common names in their pages doesnt mean we cant use other common names in presentations and io print and we should

Fall1997 23

What we need is a list of comshymon names that the average mosshyquito control practitioner uses No one that anyone takes seriously will say they found some Culex pipiens quinquefasciatus (note no italics) in a polluted pond Most will say quinks Sure we can capitalize Quinks if it makes you feel better it does me So why are we afraid to write Quinks in our reports or say Quinks in formal talks Most people probably dont say quinks (see I dont insist on capitalization) because they think it makes them sound unprofessional Quinks is a distinctive short easy to rememshyber and fun to say name it has a beat that you can dance to and I give it a 99 Does anyone you know call quinks the southern house mosquito the accepted common name How about northern house mosquito for pipiens

Taenies or taenys or whatshyever spelling you want to use is easily recognized by east and south coast mosquito people as the comshymon name for Aedes taeniorhynchus one of the saltmarsh mosquitoes Again its a distinctive short easy to rememshyber and fun name It also describes the size of the species somewhat small or teeny-a bonus And who doesnt use Tox as the common name for our other spelling bee example

We dont hesitate to use comshymon names for a group of mosquishytoes that breed in a particular habishytat In addition to saltmarsh mosshyquitoes we refer to floodwater mosquitoes (which incidently also describes many saltmarsh mosquishytoes) tree hole mosquitoes dirty water mosquitoes grey water mosshyquitoes freshwater mosquitoes container-breeding mosquitoes pasture mosquitoes rock hole mosshyquitoes crab hole mosquitoes and on and on These habitat names are not mutually exclusive For exshyample pasture mosquitoes are also floodwater mosquitoes and fresh-

24 Fall1997

water mosquitoes By the way the translation of floodwater mosquito according to the Entomological Soshyciety is Aedes sticticus What Habitat names are also convenient for discussions among people from different geographic areas For example nature tends to give the same qualities to mosquitoes that breed in tree holes regardless of whether they are tree holes in Calishyfornia Virginia Queensland or Borneo From an operational mosshyquito control standpoint knowing the habitat of the mosquito can be more informative than knowing its scientific name

So lets consider some common names of species that we might use One common pest and potenshytial vector species that needs a common name is Coquillettidia perturbans (I think Ive weaned myself from italics) the aggressive biter whose larvae attach to the roots of aquatic plants particularly cattails (I could have said Typha species) Cattail mosquito is a natural even though larvae may attach to a variety of plants Another name could be the salt and pepshyper mosquito or another name taken from its scientific name could be the perturbing mosquito

How about the Anopheles The accepted common name for Anopheles quadrimaculatus is the common malaria mosquito This may have been accurate when malaria was a problem in this counshytry but now neither malaria nor this mosquito is common in this counshytry Im sure most of our hypothetishycal naming committee made up of operational mosquito controllers would call them quads

We have already dealt with Quinks Another obvious common name for another Culex Cx salinarius is sally or sallys or sallies Culex restuans is a little more tricky but how about rusty Rusty is suggestive of the color of the mosquito and it is similar to

resty a name that just doesnt sound right to me

Aedes vexans a common floodshywater mosquito in much of the US needs a common name The acshycepted common name vexans mosquito would be OK if most people know what vexing means And if they do why not call it the vexing mosquito Calling Aedes aegypti in the US by its accepted name the yellowfever mosquito is misleading Yellow fever has been absent from the US since right after the turn of the century Aegypti or gyps is often used by field and lab workers so why not adopt those terms

I could go on and on but Im more interested in what you think If you will send me your common names (keep it clean please) for any species you are familiar with Ill be happy to compile them and report back in a future article in Wing Beats (Theres that italics again different reason) If they appear in Wing Beats maybe just maybe we can call them official common names You can fax me at 561-778-7204 or E-mail me at cdmognvifas ufledu By the way you can address the message to Charlie Chas or Char The only person I insist call me doctor is my ex-wife and I would rather she didnt call me at all

-C_h~ulie M~rtis middot is an Assoshy _ciate middotPi~fesso( at the Unishy versity ~f floridas Medical Eiitomology Laboratory middot hi middot middot

Verq Beach Fiorida~

continued from page 20

providing support for report prepashyration and other documents and perform secretarial functions

Funding

In order to advance the objecshytives of GCDPP a stable source of funding will be necessary WHO CTD (WHO-Division of Control of Tropical Diseases) will establish and administer a trust fund which will be designated as GCDPP-Trust Fund which will be administered according to the WHO financial rules regulations and practices

The trust fund will be used to convene meetings production and dissemination of documents exshychange and dissemination of inforshymation on the need for public health pesticides and equipment and for activities which will promote the development and use of alternative safe compounds or application equipment

1James of organizations institushytions foundations manufacturers and individuals participating and contributing to this program will be listed Each participant will be enshycouraged to make annual contribushytions to the trust fund

Further Information

For further information on WHOshyPES or GCDPP contact Dr Zaim Morteza WHO-PES CTD World Health Organ ization 1211 Geneva 27 Switzerland E-mail zaimmwhoch

Nlir smiddotMulla is a Profes-sor with the Deparfrilent of ~nt-oshy_mologyUniverslty at califor middot -nia Riversidemiddot CA92521 middot _ middot middot

-

middotMulla= Receives -middot

Recognition Awar(j _

Mir S Mulla Professor of Entoshymology Department of Entomolshyogy University of California Rivershyside CA was presented the Scishyence Society of Thailand~ Meritoshyrious Recognition Award by the Thailand Minister of Science and Technology last October

Mulla an authority on insects of medical and public health imporshytance was cited for his efforts and leadership in organizing the First International Symposium on Biopesticides convened at Naresuan University in Thailand This symposium attended by some 300 participants from 20 countries covered biodiversity safety toxicshyity efficacy and proper use of biopesticides based on natural products and pathogenic organshyisms The proceedings of this first symposium amounting to 300 pages will be published soon

Mulla informs us that the 2nd International Symposium on Biopesticides will be held in late October 1998 on Langkawi Island off the coast of Malaysia Anyone interested in receiving further inforshymation regarding the proceedings or the second symposium should contact Dr Mulla at tel (909) 787-5818 fax (909) 787-4210 and eshymail mulla mailucredu

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Notice Psotophora middotgtcyaneseens collect~d middotin Aiachua County FL

- ~

and 9 pupae of this species were collected by the author from a sunshylit small (ca 2 m diam and 20 em deep) grass-lined pool filled with rainwater at Gainesville Florida

a common identification number with their 41h instar larval and pupal exuviae On subsequent visits to the site no additional Ps cyanescens were collected

Psorophora cyanescens (Coquillett) previously has been reported in Florida from the followshying counties Bay Duval Escambia Gadsden Hillsborough Jackson Leon Okaloosa Suwannee and Union (HT Evans Florida Mosquito Control Handbook 1994) On 26 May 1997 one 4h instar larva

Also collected from the pool were numerous larvae and pupae of Psorophora columbiae (Dyar and Knab) Aedes vexans (Meigen) and Culex salinarius Coquillett and 17 4h instar larvae of Psorophora ciliata (Fabricus) All immatures were individually reared and the resulting adults were linked by

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In order to update the Directory we would appreciate your completing this form Please type or print and return it to the address listed below We would also appreciate your copying this form and supplyshying it to any colleagues who are working in this field Your cooperation will allow greater communication and efficiency within our profession

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Fall1997

Date completed

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Page 15: Wing Beats Volume 8 Number 3wingbeats.floridamosquito.org/Wingbeats/pdfs/Vol8No3.pdf · 2014. 4. 11. · Stan Cope, Norfolk, VA Betsy Field, Vero Beach, FL John Gamble, New Smyrna

house mixes of blank granules with active ingredients and commercially finished products The 75 lbs is not just a figure that has been pulled out of the sky but one that many trials and observations have shown to be necessary to get good coverage with a variety of bottom contours and vegetation types You may need a different base rate When field personnel are conshyfronted with heavy detritus or vegshyetation aggregated larvae or a preponderance of late in star larvae they can then increase their applishycation by slowing down their pace or narrowing the swath to raise the dosage of pesticide (remembering to stay within the maximum labeled rate)

Whatever the formulation the proper application is critical to the efficiency and effectiveness of your program Larvicide labels comshymonly include only very general guidelines for application techshyniques or equipment selection This latitude allows applicators and technical staffs to choose a system that works best for their circumshystances A granular label notes the material should be applied unishyformly in conventional aerial and ground equipment

Equipment Calibration

Equipment calibrations are imshyportant for the effectiveness of your operation Consistency is born out of practice on top of more practice Failures of larvicides are often atshytributed to missed areas caused by poor applications Calibrating flows on dry application equipment is done either by timing how long it takes for a known amount to pass through the unit or by collecting all the material blown from the nozzle for a fixed period of time and then weighing it Either should be done by two people one that handles the machine and one that does the timshying The collection method retains

the material for subsequent tests but may restrict the flow on certain machines Machines with powershyful air blasts can only be checked by timing the discharge of a known quantity

Knowledge of the flow rate and of factors affecting it are critical to calibration The most common powshyered ground equipment used for dry applications is the gasolineshyengined backpack mistblower duster The units are capable of providing even coverage good throw and are simple to use They typically broadcast granules in a 40-60 ft swath width with the operator walking at 1-3 miles per hour This translates to 5-20 acres per hour of spray time Several things can be done to change the flow rate with the nozzle orifice or disc as the primary determinate Changing the pressure will also change the flow but to a much lesser degree and it has other side effects Some power dusters have movable grates that regulate flow over the normal opshyerating range Some brands have a series of replaceable orifice discs that allow discharge rate changes in small steps Blower speed also affects the throw but that should have marginal effect on the disshycharge rate

Other ground equipment that may be used include crank slinger seeders horn seeders and modishyfied ULV equipment (eg Arrow Guns mentioned above) The flow of spinning disc spreaders or othshyers with a mechanical agitator may be somewhat affected by the opshyerational speed Horn seeders which have about a 20 ft swath width when applying Bti granules are often used by our field personshynel to treat small sites They have replaced the Dipper and Bucket method where an applicator fills a dipper from a bucket of granules and then carefully and evenly broadcasts them

An Example

Assume you have determined that you can comfortably apply B ti corncob granules in 50ft swaths at 2 mph (121 acreshour) using a duster and you want to apply them at 25 to 10 lbsacre To get proper coverage in typical vegetation you will use 5 lbsacre and when conshyfronted with adverse conditions you may double or in this case with a maximum label rate of 20 lbs acre quadruple the application to get the proper dosage of pesticide to the insect

Fill the hopper with granules making sure not to get any pieces of paper or other debris mixed into the product If the unit is equipped with an air agitation system make sure that it is operational Start the engine and make sure that the granules are free flowing through the nozzle If the unit is equipped with an adjustable gate style regushylator center it for an initial trial Close the flow control For collectshying granules you need a nylon stocking and a scale that measures to ounces or grams Place the stocking over the discharge tube and secure it with a rubber band The stocking should be supported so it wont pinch the air flow off Run the blower up to speed and then open the flow valve as you start timing Have the operator open the valve as the stop watch is started

Because of the very low flows (small quantities) of granules needed take a sample over a given period in the 3-5 minute range Shut the flow off as the timer notes the end of the period Pull the colshylection into the bottom of the stockshying and remove it from the nozzle Place another stocking on the duster and collect a second sample and then a third sample Collect at least three samples weigh each and average the results Be sure to subtract the weight of the stock-

Fall1997 17

ing before calculating the average If one sample volume is much higher or lower than the other two samples then replace the odd sample with a new one Assume you collected three 5-minute samples that weigh 61 64 and 59 oz each The average is 61 3 oz5 min or 1227 ozmin

Practice

Swath tests are best done inishytially using a paved surface such as a parking lot for a practice spray plot because the granules are easshyily seen Blank granules for pracshytice and for your own formulating may be purchased from The Andersons (800-537-3370) and other sources Get 1014 grit if you use Vectobac CG or an equivalent and 58 grit if you use Vectobac G or an equivalent Fill the hopper with a weighed quantity of granules and walk over the plot trying to cover the entire area with an even dosage To determine how much was applied empty the hopper and weigh the material remaining Afshyter a good distribution has been

mast~red move onto a measured field where the terrain is more diffishycult and continue practicing Proshygressively move into more difficult areas as your skill level increases You can get to the point where you know what 5 lbsacre looks like in any habitat and then when you apshyply the real stuff you will know you have done so properly

Assume your practice spray plot is 18 of an acre Therefore to get the proper dose you want to apply 18 of 5 lbs (0625 lbs or 10 oz) to the plot You earlier calculated that your duster is putting out approxishymately 1225 oz per min The calshyculated time to put out the 1 0 oz required to treat the test plot is 082 minutes or49 seconds [determined by dividing 10 ounces by 1225] You also determined that you can treat 121 acreshour at a 2 mph walking speed At that speed you can treat about 16 of an acre in 49 seconds You have three choices to adequately cover your 18 acre practice plot 1) You can walk at your normal speed and apply at a rate slightly higher than 5 lbsacre 2) you can walk a little slower and

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If you have any questions feel free to contact the authors at Pasco County Mosquito Control District 2308 Marathon Road Odessa Fl 33556 Phone 813-376-4568 Fax 813-376-470 Email pcmcdgtenet

~

Doug middot wassmer _ _Jim middot _ Robinson middotand Jack-Frerich middotmiddot middot are-middot vyith the pascomiddotmiddotc_qun~y middot Mosquito Control bistr_ict middot

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In order to control or eradicate vector-borne disease the world Health Organization launched a substantial program of research on the screening evaluation and deshyvelopment of pesticides for the conshytrol of disease vectors and human pests in the early 1960s This proshygram of research and development continued into the 1970s Various collaboration centers and WHO regional research laboratories were involved in this multiphasic evaluashytion and research program This program was later designated as WHO-PES (WHO Pesticides Evaluation Scheme) which inshycluded laboratory screening of new pesticides and their formulations and finally small-scale and largeshyscale village field trials where effishycacy safety and feasibility of applishycation were studied Additionally whenever possible impact on the level of endemic diseases was also assessed The 41

h phase of this scheme addressed specification of pesticides and their formulations to be used in vector control

The WHO-PES program evenshytually came to a halt in the eighties and with restructuring of the vector Biology and Control Division in WHO this program came to a grinding halt It soon became apshyparent that member countries carshyrying on substantial vector control programs especially mosquito conshytrol operations soon reached the stage when appropriate tools and strategies for use in operational programs became quite scarce Member countries put forward deshymands for the development of more effective and safer chemical and

20 Fa111997

biological control measures To reshyspond to this global demand the Division of Control of Tropical Disshyeases (CTD) at WHO reinvigorated the WHO-PES Program by holding an informal consultation on the Evaluation and Testing of Insectishycides on October 1996 where I was asked to serve as the Chairperson of the consultation Copies of the report of this Consultation can be obtained from Dr Zaim Morteza whose address appears at the end of this article

As a result of the Informal Conshysultation and other discussions held at WHO regarding the future need for public health pesticides CTD recently (1996) launched the GCDPP program This is indeed a crucial program which requires colshylaboration among national and inshyternational agencies research inshystitutions industry and regulatory agencies The main objectives elshyements and scope of this program are briefly discussed below

The main objectives of the GCDPP program are

bull To facilitate the search for alternative pesticides including mishycrobial pesticides as well as applishycation methodologies

bull To advise on the relative priority of activities within the manshydate of GCDPP

bull To advise on issues related to the development and use of pesshyticides and application equipment within the context of WHOs global disease control strategies

bull To promote harmonization of activities related to pesticide deshyvelopment and safe use

bull To promote and encourage the highest quality of work through appropriate resource mobilization

bull GCDPP will serve as an advisory group to CTDWHOPES in matters of pesticide developshyment safe and proper use and apshyplication equipment

Membership and Meetings

A number of agencies organishyzations and manufacturers of pesshyticides and application equipment will become members of GCDPP as well as foundations and WHO Collaborating Centers Other groups and -organizations involved in manufacturing pest manageshyment and crop protection will also be invited Attempts will be made to maximize representation but at the same time ensure appropriate balance In addition to the above distinguished scientists and direcshytors of WHO Regional Offices may also be invited to attend the meetshyings of GCDPP

GCDPP will provide a forum for the exchange of technical informashytion and oversee the WHO-PES biennial plan and collaboration with other organizations and institutions GCDPP will meet every other year in Geneva Switzerland Informal consultation meetings on specific topics will be convened as the need arises CTD will be responsible for the organization of such meetings

continued on page 25

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WJtclt~s ~111 bull bull 1ame bull

How many of you know the names Norma Jean Baker Cornelius Magillicutty dichloroshydiphenyl-trichloro-ethane Haliaeetus leucocephalus and its distant relative Taxodium distichum How about Aedes albopictus Well if you are willing to bet $100 you know all six withshyout looking at the answers then you are either very bright very old well read or have too much time on your hands If you know only one I hope its the Asian tiger mosquito What if for the remaining five I gave you the hints of Some Like it Hot baseball legend insecticide whiteshyheaded bird and tree with knees The older ones amongst us and thats getting to be a higher percentshyage each year should recognize Marilyn Monroe and Connie Mack for the first two All of you should be ashamed of yourself if you dont recognized DDT The last two reshylated by name only are Bald Eagle and Bald Cypress If you got both of those you are probably psychic and also know what the point of this article is

And what is the point of this arshyticle the need for common names for mosquitoes Most of us know the birds plants and mammals by their common names Why then must we for the most part use scishyentific names for mosquitoes There are other names that would be more meaningful easier to spell and certainly easier to pronounce Ill bet my $100 right now that 50 of us couldnt spell Toxorhynchites or taeniorhynchus in a spelling bee Thank goodness Aedes abopictus had a catchy common name when

- bull bull -middot ~ bull middot- ~ bull ~ bull

it became established in the US in 1985 Never mind that the common name conjured up all sorts of wrong impressions Asian tiger mosquito was a lot easier for the public and press and I dare say most mosshyquito control practitioners to undershystand and remember Also our friends at the Entomological Socishyety had the accepted common name as Forest Day mosquito but to their credit they changed it to what every one calls it the Asian tiger mosquito

So despite their scientific bent scientists can be influenced to change their minds If common names and abbreviations too didnt have a purpose that is to help us to communicate then we would all be saying too many long boring and confusing sentences Consider the following For years Cornelius Magillicutty sprayed his back yard with dichloro-diphenylshytrichloro-ethane for Aedes abopictus and then years later with Norma Jean Baker at his side watched the thin-shelled eggs of Haliaeetus leucocephalus drop out of 500-year old Taxodium distichum that he loved so much Yawn

Its that kind of phraseology that keeps people including some scishyentists from reading the scientific literature When trying to commushynicate any word or phrase that your listener doesnt know or understand tends to confuse them annoy them or make them feel inferior and that often makes them stop listening Communicating with the public has become a major mosquito control activity in recent years When com-

municating with the public scientific terms and jargon are neither desirshyable or necessary Mosquito control activities can be explained in very simple terms We could use the term Bacillus thuringiensis var israeensis instead of BTl but how many of us do Telling the average person SLE is an arbovirus doesnt give them any more information than telling them its a virus

And whats with this italics stuff for scientific names Ask people (inshycluding you perhaps) why we italishycize scientific names and most will probably guess that its to emphashysis the term Wrong If you care why look it up Lets forget it from now on OK If you cant write Culex quinquefasciatus without italics then consider my alternative-comshymon names that dont need to be italicized

The Entomological Society of America has a committee that conshysiders and usually rejects proshyposed official common names for insects There are only 14 mosshyquitoes on that list and I dare say most of us dont use most of them The problem with this list is that it was developed by scientists and everyone knows that all scientists are mad not just those in the movshyies Scientists want to do things in a scientific manner-logical meshythodical and precise Just because the entomological journals will only let you use accepted common names in their pages doesnt mean we cant use other common names in presentations and io print and we should

Fall1997 23

What we need is a list of comshymon names that the average mosshyquito control practitioner uses No one that anyone takes seriously will say they found some Culex pipiens quinquefasciatus (note no italics) in a polluted pond Most will say quinks Sure we can capitalize Quinks if it makes you feel better it does me So why are we afraid to write Quinks in our reports or say Quinks in formal talks Most people probably dont say quinks (see I dont insist on capitalization) because they think it makes them sound unprofessional Quinks is a distinctive short easy to rememshyber and fun to say name it has a beat that you can dance to and I give it a 99 Does anyone you know call quinks the southern house mosquito the accepted common name How about northern house mosquito for pipiens

Taenies or taenys or whatshyever spelling you want to use is easily recognized by east and south coast mosquito people as the comshymon name for Aedes taeniorhynchus one of the saltmarsh mosquitoes Again its a distinctive short easy to rememshyber and fun name It also describes the size of the species somewhat small or teeny-a bonus And who doesnt use Tox as the common name for our other spelling bee example

We dont hesitate to use comshymon names for a group of mosquishytoes that breed in a particular habishytat In addition to saltmarsh mosshyquitoes we refer to floodwater mosquitoes (which incidently also describes many saltmarsh mosquishytoes) tree hole mosquitoes dirty water mosquitoes grey water mosshyquitoes freshwater mosquitoes container-breeding mosquitoes pasture mosquitoes rock hole mosshyquitoes crab hole mosquitoes and on and on These habitat names are not mutually exclusive For exshyample pasture mosquitoes are also floodwater mosquitoes and fresh-

24 Fall1997

water mosquitoes By the way the translation of floodwater mosquito according to the Entomological Soshyciety is Aedes sticticus What Habitat names are also convenient for discussions among people from different geographic areas For example nature tends to give the same qualities to mosquitoes that breed in tree holes regardless of whether they are tree holes in Calishyfornia Virginia Queensland or Borneo From an operational mosshyquito control standpoint knowing the habitat of the mosquito can be more informative than knowing its scientific name

So lets consider some common names of species that we might use One common pest and potenshytial vector species that needs a common name is Coquillettidia perturbans (I think Ive weaned myself from italics) the aggressive biter whose larvae attach to the roots of aquatic plants particularly cattails (I could have said Typha species) Cattail mosquito is a natural even though larvae may attach to a variety of plants Another name could be the salt and pepshyper mosquito or another name taken from its scientific name could be the perturbing mosquito

How about the Anopheles The accepted common name for Anopheles quadrimaculatus is the common malaria mosquito This may have been accurate when malaria was a problem in this counshytry but now neither malaria nor this mosquito is common in this counshytry Im sure most of our hypothetishycal naming committee made up of operational mosquito controllers would call them quads

We have already dealt with Quinks Another obvious common name for another Culex Cx salinarius is sally or sallys or sallies Culex restuans is a little more tricky but how about rusty Rusty is suggestive of the color of the mosquito and it is similar to

resty a name that just doesnt sound right to me

Aedes vexans a common floodshywater mosquito in much of the US needs a common name The acshycepted common name vexans mosquito would be OK if most people know what vexing means And if they do why not call it the vexing mosquito Calling Aedes aegypti in the US by its accepted name the yellowfever mosquito is misleading Yellow fever has been absent from the US since right after the turn of the century Aegypti or gyps is often used by field and lab workers so why not adopt those terms

I could go on and on but Im more interested in what you think If you will send me your common names (keep it clean please) for any species you are familiar with Ill be happy to compile them and report back in a future article in Wing Beats (Theres that italics again different reason) If they appear in Wing Beats maybe just maybe we can call them official common names You can fax me at 561-778-7204 or E-mail me at cdmognvifas ufledu By the way you can address the message to Charlie Chas or Char The only person I insist call me doctor is my ex-wife and I would rather she didnt call me at all

-C_h~ulie M~rtis middot is an Assoshy _ciate middotPi~fesso( at the Unishy versity ~f floridas Medical Eiitomology Laboratory middot hi middot middot

Verq Beach Fiorida~

continued from page 20

providing support for report prepashyration and other documents and perform secretarial functions

Funding

In order to advance the objecshytives of GCDPP a stable source of funding will be necessary WHO CTD (WHO-Division of Control of Tropical Diseases) will establish and administer a trust fund which will be designated as GCDPP-Trust Fund which will be administered according to the WHO financial rules regulations and practices

The trust fund will be used to convene meetings production and dissemination of documents exshychange and dissemination of inforshymation on the need for public health pesticides and equipment and for activities which will promote the development and use of alternative safe compounds or application equipment

1James of organizations institushytions foundations manufacturers and individuals participating and contributing to this program will be listed Each participant will be enshycouraged to make annual contribushytions to the trust fund

Further Information

For further information on WHOshyPES or GCDPP contact Dr Zaim Morteza WHO-PES CTD World Health Organ ization 1211 Geneva 27 Switzerland E-mail zaimmwhoch

Nlir smiddotMulla is a Profes-sor with the Deparfrilent of ~nt-oshy_mologyUniverslty at califor middot -nia Riversidemiddot CA92521 middot _ middot middot

-

middotMulla= Receives -middot

Recognition Awar(j _

Mir S Mulla Professor of Entoshymology Department of Entomolshyogy University of California Rivershyside CA was presented the Scishyence Society of Thailand~ Meritoshyrious Recognition Award by the Thailand Minister of Science and Technology last October

Mulla an authority on insects of medical and public health imporshytance was cited for his efforts and leadership in organizing the First International Symposium on Biopesticides convened at Naresuan University in Thailand This symposium attended by some 300 participants from 20 countries covered biodiversity safety toxicshyity efficacy and proper use of biopesticides based on natural products and pathogenic organshyisms The proceedings of this first symposium amounting to 300 pages will be published soon

Mulla informs us that the 2nd International Symposium on Biopesticides will be held in late October 1998 on Langkawi Island off the coast of Malaysia Anyone interested in receiving further inforshymation regarding the proceedings or the second symposium should contact Dr Mulla at tel (909) 787-5818 fax (909) 787-4210 and eshymail mulla mailucredu

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Fall1997 25

Notice Psotophora middotgtcyaneseens collect~d middotin Aiachua County FL

- ~

and 9 pupae of this species were collected by the author from a sunshylit small (ca 2 m diam and 20 em deep) grass-lined pool filled with rainwater at Gainesville Florida

a common identification number with their 41h instar larval and pupal exuviae On subsequent visits to the site no additional Ps cyanescens were collected

Psorophora cyanescens (Coquillett) previously has been reported in Florida from the followshying counties Bay Duval Escambia Gadsden Hillsborough Jackson Leon Okaloosa Suwannee and Union (HT Evans Florida Mosquito Control Handbook 1994) On 26 May 1997 one 4h instar larva

Also collected from the pool were numerous larvae and pupae of Psorophora columbiae (Dyar and Knab) Aedes vexans (Meigen) and Culex salinarius Coquillett and 17 4h instar larvae of Psorophora ciliata (Fabricus) All immatures were individually reared and the resulting adults were linked by

John -Fmiddotmiddoteeinert is with Jlie CeMte(for Medicental middotAgricultural

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REGISTRATION FOR WORLD DIRECTORY OF ARTHROPOD VECTOR RESEARCH AND CONTROL SPECIALISTS

In order to update the Directory we would appreciate your completing this form Please type or print and return it to the address listed below We would also appreciate your copying this form and supplyshying it to any colleagues who are working in this field Your cooperation will allow greater communication and efficiency within our profession

Name (Last or family name) (First or given name)

Title of present position ----------- Nationality

Present Address _______________________________ _

Telephone (Work) _____ (Home) _____ Fax ______ E-mail _______ _

DEGREES DATE UNIVERSITY

Languages understood Specialty ------------

Professional society affiliations AMCA __ SOVE __ ESA __ ASTMH __ RSTMH __ ESC __

Other ______________________ _

Please return by Air Mail to Dr Eugene Gerberg Chairman AMCA International Affairs Committee 5819 NW 57th Way Gainesville FL 32653-3257 USA

Fall1997

Date completed

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Page 16: Wing Beats Volume 8 Number 3wingbeats.floridamosquito.org/Wingbeats/pdfs/Vol8No3.pdf · 2014. 4. 11. · Stan Cope, Norfolk, VA Betsy Field, Vero Beach, FL John Gamble, New Smyrna

ing before calculating the average If one sample volume is much higher or lower than the other two samples then replace the odd sample with a new one Assume you collected three 5-minute samples that weigh 61 64 and 59 oz each The average is 61 3 oz5 min or 1227 ozmin

Practice

Swath tests are best done inishytially using a paved surface such as a parking lot for a practice spray plot because the granules are easshyily seen Blank granules for pracshytice and for your own formulating may be purchased from The Andersons (800-537-3370) and other sources Get 1014 grit if you use Vectobac CG or an equivalent and 58 grit if you use Vectobac G or an equivalent Fill the hopper with a weighed quantity of granules and walk over the plot trying to cover the entire area with an even dosage To determine how much was applied empty the hopper and weigh the material remaining Afshyter a good distribution has been

mast~red move onto a measured field where the terrain is more diffishycult and continue practicing Proshygressively move into more difficult areas as your skill level increases You can get to the point where you know what 5 lbsacre looks like in any habitat and then when you apshyply the real stuff you will know you have done so properly

Assume your practice spray plot is 18 of an acre Therefore to get the proper dose you want to apply 18 of 5 lbs (0625 lbs or 10 oz) to the plot You earlier calculated that your duster is putting out approxishymately 1225 oz per min The calshyculated time to put out the 1 0 oz required to treat the test plot is 082 minutes or49 seconds [determined by dividing 10 ounces by 1225] You also determined that you can treat 121 acreshour at a 2 mph walking speed At that speed you can treat about 16 of an acre in 49 seconds You have three choices to adequately cover your 18 acre practice plot 1) You can walk at your normal speed and apply at a rate slightly higher than 5 lbsacre 2) you can walk a little slower and

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apply at the normal rate or 3) you can decrease the flow rate a bit to achieve the target rate at your norshymal application speed The choice is yours

If you have any questions feel free to contact the authors at Pasco County Mosquito Control District 2308 Marathon Road Odessa Fl 33556 Phone 813-376-4568 Fax 813-376-470 Email pcmcdgtenet

~

Doug middot wassmer _ _Jim middot _ Robinson middotand Jack-Frerich middotmiddot middot are-middot vyith the pascomiddotmiddotc_qun~y middot Mosquito Control bistr_ict middot

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In order to control or eradicate vector-borne disease the world Health Organization launched a substantial program of research on the screening evaluation and deshyvelopment of pesticides for the conshytrol of disease vectors and human pests in the early 1960s This proshygram of research and development continued into the 1970s Various collaboration centers and WHO regional research laboratories were involved in this multiphasic evaluashytion and research program This program was later designated as WHO-PES (WHO Pesticides Evaluation Scheme) which inshycluded laboratory screening of new pesticides and their formulations and finally small-scale and largeshyscale village field trials where effishycacy safety and feasibility of applishycation were studied Additionally whenever possible impact on the level of endemic diseases was also assessed The 41

h phase of this scheme addressed specification of pesticides and their formulations to be used in vector control

The WHO-PES program evenshytually came to a halt in the eighties and with restructuring of the vector Biology and Control Division in WHO this program came to a grinding halt It soon became apshyparent that member countries carshyrying on substantial vector control programs especially mosquito conshytrol operations soon reached the stage when appropriate tools and strategies for use in operational programs became quite scarce Member countries put forward deshymands for the development of more effective and safer chemical and

20 Fa111997

biological control measures To reshyspond to this global demand the Division of Control of Tropical Disshyeases (CTD) at WHO reinvigorated the WHO-PES Program by holding an informal consultation on the Evaluation and Testing of Insectishycides on October 1996 where I was asked to serve as the Chairperson of the consultation Copies of the report of this Consultation can be obtained from Dr Zaim Morteza whose address appears at the end of this article

As a result of the Informal Conshysultation and other discussions held at WHO regarding the future need for public health pesticides CTD recently (1996) launched the GCDPP program This is indeed a crucial program which requires colshylaboration among national and inshyternational agencies research inshystitutions industry and regulatory agencies The main objectives elshyements and scope of this program are briefly discussed below

The main objectives of the GCDPP program are

bull To facilitate the search for alternative pesticides including mishycrobial pesticides as well as applishycation methodologies

bull To advise on the relative priority of activities within the manshydate of GCDPP

bull To advise on issues related to the development and use of pesshyticides and application equipment within the context of WHOs global disease control strategies

bull To promote harmonization of activities related to pesticide deshyvelopment and safe use

bull To promote and encourage the highest quality of work through appropriate resource mobilization

bull GCDPP will serve as an advisory group to CTDWHOPES in matters of pesticide developshyment safe and proper use and apshyplication equipment

Membership and Meetings

A number of agencies organishyzations and manufacturers of pesshyticides and application equipment will become members of GCDPP as well as foundations and WHO Collaborating Centers Other groups and -organizations involved in manufacturing pest manageshyment and crop protection will also be invited Attempts will be made to maximize representation but at the same time ensure appropriate balance In addition to the above distinguished scientists and direcshytors of WHO Regional Offices may also be invited to attend the meetshyings of GCDPP

GCDPP will provide a forum for the exchange of technical informashytion and oversee the WHO-PES biennial plan and collaboration with other organizations and institutions GCDPP will meet every other year in Geneva Switzerland Informal consultation meetings on specific topics will be convened as the need arises CTD will be responsible for the organization of such meetings

continued on page 25

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How many of you know the names Norma Jean Baker Cornelius Magillicutty dichloroshydiphenyl-trichloro-ethane Haliaeetus leucocephalus and its distant relative Taxodium distichum How about Aedes albopictus Well if you are willing to bet $100 you know all six withshyout looking at the answers then you are either very bright very old well read or have too much time on your hands If you know only one I hope its the Asian tiger mosquito What if for the remaining five I gave you the hints of Some Like it Hot baseball legend insecticide whiteshyheaded bird and tree with knees The older ones amongst us and thats getting to be a higher percentshyage each year should recognize Marilyn Monroe and Connie Mack for the first two All of you should be ashamed of yourself if you dont recognized DDT The last two reshylated by name only are Bald Eagle and Bald Cypress If you got both of those you are probably psychic and also know what the point of this article is

And what is the point of this arshyticle the need for common names for mosquitoes Most of us know the birds plants and mammals by their common names Why then must we for the most part use scishyentific names for mosquitoes There are other names that would be more meaningful easier to spell and certainly easier to pronounce Ill bet my $100 right now that 50 of us couldnt spell Toxorhynchites or taeniorhynchus in a spelling bee Thank goodness Aedes abopictus had a catchy common name when

- bull bull -middot ~ bull middot- ~ bull ~ bull

it became established in the US in 1985 Never mind that the common name conjured up all sorts of wrong impressions Asian tiger mosquito was a lot easier for the public and press and I dare say most mosshyquito control practitioners to undershystand and remember Also our friends at the Entomological Socishyety had the accepted common name as Forest Day mosquito but to their credit they changed it to what every one calls it the Asian tiger mosquito

So despite their scientific bent scientists can be influenced to change their minds If common names and abbreviations too didnt have a purpose that is to help us to communicate then we would all be saying too many long boring and confusing sentences Consider the following For years Cornelius Magillicutty sprayed his back yard with dichloro-diphenylshytrichloro-ethane for Aedes abopictus and then years later with Norma Jean Baker at his side watched the thin-shelled eggs of Haliaeetus leucocephalus drop out of 500-year old Taxodium distichum that he loved so much Yawn

Its that kind of phraseology that keeps people including some scishyentists from reading the scientific literature When trying to commushynicate any word or phrase that your listener doesnt know or understand tends to confuse them annoy them or make them feel inferior and that often makes them stop listening Communicating with the public has become a major mosquito control activity in recent years When com-

municating with the public scientific terms and jargon are neither desirshyable or necessary Mosquito control activities can be explained in very simple terms We could use the term Bacillus thuringiensis var israeensis instead of BTl but how many of us do Telling the average person SLE is an arbovirus doesnt give them any more information than telling them its a virus

And whats with this italics stuff for scientific names Ask people (inshycluding you perhaps) why we italishycize scientific names and most will probably guess that its to emphashysis the term Wrong If you care why look it up Lets forget it from now on OK If you cant write Culex quinquefasciatus without italics then consider my alternative-comshymon names that dont need to be italicized

The Entomological Society of America has a committee that conshysiders and usually rejects proshyposed official common names for insects There are only 14 mosshyquitoes on that list and I dare say most of us dont use most of them The problem with this list is that it was developed by scientists and everyone knows that all scientists are mad not just those in the movshyies Scientists want to do things in a scientific manner-logical meshythodical and precise Just because the entomological journals will only let you use accepted common names in their pages doesnt mean we cant use other common names in presentations and io print and we should

Fall1997 23

What we need is a list of comshymon names that the average mosshyquito control practitioner uses No one that anyone takes seriously will say they found some Culex pipiens quinquefasciatus (note no italics) in a polluted pond Most will say quinks Sure we can capitalize Quinks if it makes you feel better it does me So why are we afraid to write Quinks in our reports or say Quinks in formal talks Most people probably dont say quinks (see I dont insist on capitalization) because they think it makes them sound unprofessional Quinks is a distinctive short easy to rememshyber and fun to say name it has a beat that you can dance to and I give it a 99 Does anyone you know call quinks the southern house mosquito the accepted common name How about northern house mosquito for pipiens

Taenies or taenys or whatshyever spelling you want to use is easily recognized by east and south coast mosquito people as the comshymon name for Aedes taeniorhynchus one of the saltmarsh mosquitoes Again its a distinctive short easy to rememshyber and fun name It also describes the size of the species somewhat small or teeny-a bonus And who doesnt use Tox as the common name for our other spelling bee example

We dont hesitate to use comshymon names for a group of mosquishytoes that breed in a particular habishytat In addition to saltmarsh mosshyquitoes we refer to floodwater mosquitoes (which incidently also describes many saltmarsh mosquishytoes) tree hole mosquitoes dirty water mosquitoes grey water mosshyquitoes freshwater mosquitoes container-breeding mosquitoes pasture mosquitoes rock hole mosshyquitoes crab hole mosquitoes and on and on These habitat names are not mutually exclusive For exshyample pasture mosquitoes are also floodwater mosquitoes and fresh-

24 Fall1997

water mosquitoes By the way the translation of floodwater mosquito according to the Entomological Soshyciety is Aedes sticticus What Habitat names are also convenient for discussions among people from different geographic areas For example nature tends to give the same qualities to mosquitoes that breed in tree holes regardless of whether they are tree holes in Calishyfornia Virginia Queensland or Borneo From an operational mosshyquito control standpoint knowing the habitat of the mosquito can be more informative than knowing its scientific name

So lets consider some common names of species that we might use One common pest and potenshytial vector species that needs a common name is Coquillettidia perturbans (I think Ive weaned myself from italics) the aggressive biter whose larvae attach to the roots of aquatic plants particularly cattails (I could have said Typha species) Cattail mosquito is a natural even though larvae may attach to a variety of plants Another name could be the salt and pepshyper mosquito or another name taken from its scientific name could be the perturbing mosquito

How about the Anopheles The accepted common name for Anopheles quadrimaculatus is the common malaria mosquito This may have been accurate when malaria was a problem in this counshytry but now neither malaria nor this mosquito is common in this counshytry Im sure most of our hypothetishycal naming committee made up of operational mosquito controllers would call them quads

We have already dealt with Quinks Another obvious common name for another Culex Cx salinarius is sally or sallys or sallies Culex restuans is a little more tricky but how about rusty Rusty is suggestive of the color of the mosquito and it is similar to

resty a name that just doesnt sound right to me

Aedes vexans a common floodshywater mosquito in much of the US needs a common name The acshycepted common name vexans mosquito would be OK if most people know what vexing means And if they do why not call it the vexing mosquito Calling Aedes aegypti in the US by its accepted name the yellowfever mosquito is misleading Yellow fever has been absent from the US since right after the turn of the century Aegypti or gyps is often used by field and lab workers so why not adopt those terms

I could go on and on but Im more interested in what you think If you will send me your common names (keep it clean please) for any species you are familiar with Ill be happy to compile them and report back in a future article in Wing Beats (Theres that italics again different reason) If they appear in Wing Beats maybe just maybe we can call them official common names You can fax me at 561-778-7204 or E-mail me at cdmognvifas ufledu By the way you can address the message to Charlie Chas or Char The only person I insist call me doctor is my ex-wife and I would rather she didnt call me at all

-C_h~ulie M~rtis middot is an Assoshy _ciate middotPi~fesso( at the Unishy versity ~f floridas Medical Eiitomology Laboratory middot hi middot middot

Verq Beach Fiorida~

continued from page 20

providing support for report prepashyration and other documents and perform secretarial functions

Funding

In order to advance the objecshytives of GCDPP a stable source of funding will be necessary WHO CTD (WHO-Division of Control of Tropical Diseases) will establish and administer a trust fund which will be designated as GCDPP-Trust Fund which will be administered according to the WHO financial rules regulations and practices

The trust fund will be used to convene meetings production and dissemination of documents exshychange and dissemination of inforshymation on the need for public health pesticides and equipment and for activities which will promote the development and use of alternative safe compounds or application equipment

1James of organizations institushytions foundations manufacturers and individuals participating and contributing to this program will be listed Each participant will be enshycouraged to make annual contribushytions to the trust fund

Further Information

For further information on WHOshyPES or GCDPP contact Dr Zaim Morteza WHO-PES CTD World Health Organ ization 1211 Geneva 27 Switzerland E-mail zaimmwhoch

Nlir smiddotMulla is a Profes-sor with the Deparfrilent of ~nt-oshy_mologyUniverslty at califor middot -nia Riversidemiddot CA92521 middot _ middot middot

-

middotMulla= Receives -middot

Recognition Awar(j _

Mir S Mulla Professor of Entoshymology Department of Entomolshyogy University of California Rivershyside CA was presented the Scishyence Society of Thailand~ Meritoshyrious Recognition Award by the Thailand Minister of Science and Technology last October

Mulla an authority on insects of medical and public health imporshytance was cited for his efforts and leadership in organizing the First International Symposium on Biopesticides convened at Naresuan University in Thailand This symposium attended by some 300 participants from 20 countries covered biodiversity safety toxicshyity efficacy and proper use of biopesticides based on natural products and pathogenic organshyisms The proceedings of this first symposium amounting to 300 pages will be published soon

Mulla informs us that the 2nd International Symposium on Biopesticides will be held in late October 1998 on Langkawi Island off the coast of Malaysia Anyone interested in receiving further inforshymation regarding the proceedings or the second symposium should contact Dr Mulla at tel (909) 787-5818 fax (909) 787-4210 and eshymail mulla mailucredu

AMMIA INC ~

lOUt citie4 ~ ~ and ~ COVERAGES OFFERED

(a~ ~ CtJfte and~ ~ ~ C(4t General Liability

at ~ ~ ~- Public Officials Liabili ty

PROGRAM ADMINISTRATOR SOUTHWEST ASSURANCE CORPORATION 12730 NEW BRITTANY BLVD SUITE 304 FORT MYERS FLORIDA 33907-3646

(941) 939-7303 FAX (941) 939 -1485

Automobile Liability

Aviation Liability

Aviation Hull (including theft)

Aviation Chemical Liability

Fall1997 25

Notice Psotophora middotgtcyaneseens collect~d middotin Aiachua County FL

- ~

and 9 pupae of this species were collected by the author from a sunshylit small (ca 2 m diam and 20 em deep) grass-lined pool filled with rainwater at Gainesville Florida

a common identification number with their 41h instar larval and pupal exuviae On subsequent visits to the site no additional Ps cyanescens were collected

Psorophora cyanescens (Coquillett) previously has been reported in Florida from the followshying counties Bay Duval Escambia Gadsden Hillsborough Jackson Leon Okaloosa Suwannee and Union (HT Evans Florida Mosquito Control Handbook 1994) On 26 May 1997 one 4h instar larva

Also collected from the pool were numerous larvae and pupae of Psorophora columbiae (Dyar and Knab) Aedes vexans (Meigen) and Culex salinarius Coquillett and 17 4h instar larvae of Psorophora ciliata (Fabricus) All immatures were individually reared and the resulting adults were linked by

John -Fmiddotmiddoteeinert is with Jlie CeMte(for Medicental middotAgricultural

aridVet$rih~rY Entomology u s ~ Department oFAgricul~umiddotre Agri-

26

culture~ 8e$earch Service 1600 1700 SW 23dDrive Gainesvillemiddotmiddot

bull lt middot bullbullbull _ bull bull middot J

Florida 32604 middot middot middot

REGISTRATION FOR WORLD DIRECTORY OF ARTHROPOD VECTOR RESEARCH AND CONTROL SPECIALISTS

In order to update the Directory we would appreciate your completing this form Please type or print and return it to the address listed below We would also appreciate your copying this form and supplyshying it to any colleagues who are working in this field Your cooperation will allow greater communication and efficiency within our profession

Name (Last or family name) (First or given name)

Title of present position ----------- Nationality

Present Address _______________________________ _

Telephone (Work) _____ (Home) _____ Fax ______ E-mail _______ _

DEGREES DATE UNIVERSITY

Languages understood Specialty ------------

Professional society affiliations AMCA __ SOVE __ ESA __ ASTMH __ RSTMH __ ESC __

Other ______________________ _

Please return by Air Mail to Dr Eugene Gerberg Chairman AMCA International Affairs Committee 5819 NW 57th Way Gainesville FL 32653-3257 USA

Fall1997

Date completed

Were Sales VW ampR s professional educated experienced staff knows and understands the vector control industry You can count on us to be there when you need us

Were Service VW ampR has over 70 locations across the United States and Mexico that offer convenient local vector control products Count on our professional and knowledgeable industry experts to assist you in finding solutions to your problems

Were Support bull VWampRs web site is designed to provide you with the latest

industry information Visit PestWeb for labels slides MSDSs industry news and weather reports

bull ChemCare provides you with chemical waste management solutions liSTW

bull Our licensed instructors are teaching t I~middot middotmiddot 1~ middot bull seminars in classrooms across the nation bull~middot-w~ You can count on us to he p you stay current

Were Serving the Vector Control Industry bull Btis granules liquid

sand wettable powder b1iquettes dunks

bull Larvicide oils bull UL V foggers bull Sprayers bull Fyfanon bull Natural Pyrethrin

WereVWampR

bull Resmethrin bullDibrom bull Hantavirus live traps bull Diluent oils bull Safety equipment bull Light traps bull Thermal foggers

Call Your Local VWampR Office At

1-800-888-4VWR Van Waters amp Roge~s Inc

We re More Than Just A Distributor

The Best Products including ABATE As American

Cyanamid exits the mosquito control market we are honored to be the exclusive formulashytor and distributor of ABATE products

to only a middotWarning label The new amendshyed labels also allow 1 2 and 5 Skeeter ABATE to be used as a pre-hatch in breeding and floodplain areas And now all Skeeter

in the United States ABATE has always been a

great choice for effective conshytrol and now its even better

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Page 17: Wing Beats Volume 8 Number 3wingbeats.floridamosquito.org/Wingbeats/pdfs/Vol8No3.pdf · 2014. 4. 11. · Stan Cope, Norfolk, VA Betsy Field, Vero Beach, FL John Gamble, New Smyrna

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In order to control or eradicate vector-borne disease the world Health Organization launched a substantial program of research on the screening evaluation and deshyvelopment of pesticides for the conshytrol of disease vectors and human pests in the early 1960s This proshygram of research and development continued into the 1970s Various collaboration centers and WHO regional research laboratories were involved in this multiphasic evaluashytion and research program This program was later designated as WHO-PES (WHO Pesticides Evaluation Scheme) which inshycluded laboratory screening of new pesticides and their formulations and finally small-scale and largeshyscale village field trials where effishycacy safety and feasibility of applishycation were studied Additionally whenever possible impact on the level of endemic diseases was also assessed The 41

h phase of this scheme addressed specification of pesticides and their formulations to be used in vector control

The WHO-PES program evenshytually came to a halt in the eighties and with restructuring of the vector Biology and Control Division in WHO this program came to a grinding halt It soon became apshyparent that member countries carshyrying on substantial vector control programs especially mosquito conshytrol operations soon reached the stage when appropriate tools and strategies for use in operational programs became quite scarce Member countries put forward deshymands for the development of more effective and safer chemical and

20 Fa111997

biological control measures To reshyspond to this global demand the Division of Control of Tropical Disshyeases (CTD) at WHO reinvigorated the WHO-PES Program by holding an informal consultation on the Evaluation and Testing of Insectishycides on October 1996 where I was asked to serve as the Chairperson of the consultation Copies of the report of this Consultation can be obtained from Dr Zaim Morteza whose address appears at the end of this article

As a result of the Informal Conshysultation and other discussions held at WHO regarding the future need for public health pesticides CTD recently (1996) launched the GCDPP program This is indeed a crucial program which requires colshylaboration among national and inshyternational agencies research inshystitutions industry and regulatory agencies The main objectives elshyements and scope of this program are briefly discussed below

The main objectives of the GCDPP program are

bull To facilitate the search for alternative pesticides including mishycrobial pesticides as well as applishycation methodologies

bull To advise on the relative priority of activities within the manshydate of GCDPP

bull To advise on issues related to the development and use of pesshyticides and application equipment within the context of WHOs global disease control strategies

bull To promote harmonization of activities related to pesticide deshyvelopment and safe use

bull To promote and encourage the highest quality of work through appropriate resource mobilization

bull GCDPP will serve as an advisory group to CTDWHOPES in matters of pesticide developshyment safe and proper use and apshyplication equipment

Membership and Meetings

A number of agencies organishyzations and manufacturers of pesshyticides and application equipment will become members of GCDPP as well as foundations and WHO Collaborating Centers Other groups and -organizations involved in manufacturing pest manageshyment and crop protection will also be invited Attempts will be made to maximize representation but at the same time ensure appropriate balance In addition to the above distinguished scientists and direcshytors of WHO Regional Offices may also be invited to attend the meetshyings of GCDPP

GCDPP will provide a forum for the exchange of technical informashytion and oversee the WHO-PES biennial plan and collaboration with other organizations and institutions GCDPP will meet every other year in Geneva Switzerland Informal consultation meetings on specific topics will be convened as the need arises CTD will be responsible for the organization of such meetings

continued on page 25

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How many of you know the names Norma Jean Baker Cornelius Magillicutty dichloroshydiphenyl-trichloro-ethane Haliaeetus leucocephalus and its distant relative Taxodium distichum How about Aedes albopictus Well if you are willing to bet $100 you know all six withshyout looking at the answers then you are either very bright very old well read or have too much time on your hands If you know only one I hope its the Asian tiger mosquito What if for the remaining five I gave you the hints of Some Like it Hot baseball legend insecticide whiteshyheaded bird and tree with knees The older ones amongst us and thats getting to be a higher percentshyage each year should recognize Marilyn Monroe and Connie Mack for the first two All of you should be ashamed of yourself if you dont recognized DDT The last two reshylated by name only are Bald Eagle and Bald Cypress If you got both of those you are probably psychic and also know what the point of this article is

And what is the point of this arshyticle the need for common names for mosquitoes Most of us know the birds plants and mammals by their common names Why then must we for the most part use scishyentific names for mosquitoes There are other names that would be more meaningful easier to spell and certainly easier to pronounce Ill bet my $100 right now that 50 of us couldnt spell Toxorhynchites or taeniorhynchus in a spelling bee Thank goodness Aedes abopictus had a catchy common name when

- bull bull -middot ~ bull middot- ~ bull ~ bull

it became established in the US in 1985 Never mind that the common name conjured up all sorts of wrong impressions Asian tiger mosquito was a lot easier for the public and press and I dare say most mosshyquito control practitioners to undershystand and remember Also our friends at the Entomological Socishyety had the accepted common name as Forest Day mosquito but to their credit they changed it to what every one calls it the Asian tiger mosquito

So despite their scientific bent scientists can be influenced to change their minds If common names and abbreviations too didnt have a purpose that is to help us to communicate then we would all be saying too many long boring and confusing sentences Consider the following For years Cornelius Magillicutty sprayed his back yard with dichloro-diphenylshytrichloro-ethane for Aedes abopictus and then years later with Norma Jean Baker at his side watched the thin-shelled eggs of Haliaeetus leucocephalus drop out of 500-year old Taxodium distichum that he loved so much Yawn

Its that kind of phraseology that keeps people including some scishyentists from reading the scientific literature When trying to commushynicate any word or phrase that your listener doesnt know or understand tends to confuse them annoy them or make them feel inferior and that often makes them stop listening Communicating with the public has become a major mosquito control activity in recent years When com-

municating with the public scientific terms and jargon are neither desirshyable or necessary Mosquito control activities can be explained in very simple terms We could use the term Bacillus thuringiensis var israeensis instead of BTl but how many of us do Telling the average person SLE is an arbovirus doesnt give them any more information than telling them its a virus

And whats with this italics stuff for scientific names Ask people (inshycluding you perhaps) why we italishycize scientific names and most will probably guess that its to emphashysis the term Wrong If you care why look it up Lets forget it from now on OK If you cant write Culex quinquefasciatus without italics then consider my alternative-comshymon names that dont need to be italicized

The Entomological Society of America has a committee that conshysiders and usually rejects proshyposed official common names for insects There are only 14 mosshyquitoes on that list and I dare say most of us dont use most of them The problem with this list is that it was developed by scientists and everyone knows that all scientists are mad not just those in the movshyies Scientists want to do things in a scientific manner-logical meshythodical and precise Just because the entomological journals will only let you use accepted common names in their pages doesnt mean we cant use other common names in presentations and io print and we should

Fall1997 23

What we need is a list of comshymon names that the average mosshyquito control practitioner uses No one that anyone takes seriously will say they found some Culex pipiens quinquefasciatus (note no italics) in a polluted pond Most will say quinks Sure we can capitalize Quinks if it makes you feel better it does me So why are we afraid to write Quinks in our reports or say Quinks in formal talks Most people probably dont say quinks (see I dont insist on capitalization) because they think it makes them sound unprofessional Quinks is a distinctive short easy to rememshyber and fun to say name it has a beat that you can dance to and I give it a 99 Does anyone you know call quinks the southern house mosquito the accepted common name How about northern house mosquito for pipiens

Taenies or taenys or whatshyever spelling you want to use is easily recognized by east and south coast mosquito people as the comshymon name for Aedes taeniorhynchus one of the saltmarsh mosquitoes Again its a distinctive short easy to rememshyber and fun name It also describes the size of the species somewhat small or teeny-a bonus And who doesnt use Tox as the common name for our other spelling bee example

We dont hesitate to use comshymon names for a group of mosquishytoes that breed in a particular habishytat In addition to saltmarsh mosshyquitoes we refer to floodwater mosquitoes (which incidently also describes many saltmarsh mosquishytoes) tree hole mosquitoes dirty water mosquitoes grey water mosshyquitoes freshwater mosquitoes container-breeding mosquitoes pasture mosquitoes rock hole mosshyquitoes crab hole mosquitoes and on and on These habitat names are not mutually exclusive For exshyample pasture mosquitoes are also floodwater mosquitoes and fresh-

24 Fall1997

water mosquitoes By the way the translation of floodwater mosquito according to the Entomological Soshyciety is Aedes sticticus What Habitat names are also convenient for discussions among people from different geographic areas For example nature tends to give the same qualities to mosquitoes that breed in tree holes regardless of whether they are tree holes in Calishyfornia Virginia Queensland or Borneo From an operational mosshyquito control standpoint knowing the habitat of the mosquito can be more informative than knowing its scientific name

So lets consider some common names of species that we might use One common pest and potenshytial vector species that needs a common name is Coquillettidia perturbans (I think Ive weaned myself from italics) the aggressive biter whose larvae attach to the roots of aquatic plants particularly cattails (I could have said Typha species) Cattail mosquito is a natural even though larvae may attach to a variety of plants Another name could be the salt and pepshyper mosquito or another name taken from its scientific name could be the perturbing mosquito

How about the Anopheles The accepted common name for Anopheles quadrimaculatus is the common malaria mosquito This may have been accurate when malaria was a problem in this counshytry but now neither malaria nor this mosquito is common in this counshytry Im sure most of our hypothetishycal naming committee made up of operational mosquito controllers would call them quads

We have already dealt with Quinks Another obvious common name for another Culex Cx salinarius is sally or sallys or sallies Culex restuans is a little more tricky but how about rusty Rusty is suggestive of the color of the mosquito and it is similar to

resty a name that just doesnt sound right to me

Aedes vexans a common floodshywater mosquito in much of the US needs a common name The acshycepted common name vexans mosquito would be OK if most people know what vexing means And if they do why not call it the vexing mosquito Calling Aedes aegypti in the US by its accepted name the yellowfever mosquito is misleading Yellow fever has been absent from the US since right after the turn of the century Aegypti or gyps is often used by field and lab workers so why not adopt those terms

I could go on and on but Im more interested in what you think If you will send me your common names (keep it clean please) for any species you are familiar with Ill be happy to compile them and report back in a future article in Wing Beats (Theres that italics again different reason) If they appear in Wing Beats maybe just maybe we can call them official common names You can fax me at 561-778-7204 or E-mail me at cdmognvifas ufledu By the way you can address the message to Charlie Chas or Char The only person I insist call me doctor is my ex-wife and I would rather she didnt call me at all

-C_h~ulie M~rtis middot is an Assoshy _ciate middotPi~fesso( at the Unishy versity ~f floridas Medical Eiitomology Laboratory middot hi middot middot

Verq Beach Fiorida~

continued from page 20

providing support for report prepashyration and other documents and perform secretarial functions

Funding

In order to advance the objecshytives of GCDPP a stable source of funding will be necessary WHO CTD (WHO-Division of Control of Tropical Diseases) will establish and administer a trust fund which will be designated as GCDPP-Trust Fund which will be administered according to the WHO financial rules regulations and practices

The trust fund will be used to convene meetings production and dissemination of documents exshychange and dissemination of inforshymation on the need for public health pesticides and equipment and for activities which will promote the development and use of alternative safe compounds or application equipment

1James of organizations institushytions foundations manufacturers and individuals participating and contributing to this program will be listed Each participant will be enshycouraged to make annual contribushytions to the trust fund

Further Information

For further information on WHOshyPES or GCDPP contact Dr Zaim Morteza WHO-PES CTD World Health Organ ization 1211 Geneva 27 Switzerland E-mail zaimmwhoch

Nlir smiddotMulla is a Profes-sor with the Deparfrilent of ~nt-oshy_mologyUniverslty at califor middot -nia Riversidemiddot CA92521 middot _ middot middot

-

middotMulla= Receives -middot

Recognition Awar(j _

Mir S Mulla Professor of Entoshymology Department of Entomolshyogy University of California Rivershyside CA was presented the Scishyence Society of Thailand~ Meritoshyrious Recognition Award by the Thailand Minister of Science and Technology last October

Mulla an authority on insects of medical and public health imporshytance was cited for his efforts and leadership in organizing the First International Symposium on Biopesticides convened at Naresuan University in Thailand This symposium attended by some 300 participants from 20 countries covered biodiversity safety toxicshyity efficacy and proper use of biopesticides based on natural products and pathogenic organshyisms The proceedings of this first symposium amounting to 300 pages will be published soon

Mulla informs us that the 2nd International Symposium on Biopesticides will be held in late October 1998 on Langkawi Island off the coast of Malaysia Anyone interested in receiving further inforshymation regarding the proceedings or the second symposium should contact Dr Mulla at tel (909) 787-5818 fax (909) 787-4210 and eshymail mulla mailucredu

AMMIA INC ~

lOUt citie4 ~ ~ and ~ COVERAGES OFFERED

(a~ ~ CtJfte and~ ~ ~ C(4t General Liability

at ~ ~ ~- Public Officials Liabili ty

PROGRAM ADMINISTRATOR SOUTHWEST ASSURANCE CORPORATION 12730 NEW BRITTANY BLVD SUITE 304 FORT MYERS FLORIDA 33907-3646

(941) 939-7303 FAX (941) 939 -1485

Automobile Liability

Aviation Liability

Aviation Hull (including theft)

Aviation Chemical Liability

Fall1997 25

Notice Psotophora middotgtcyaneseens collect~d middotin Aiachua County FL

- ~

and 9 pupae of this species were collected by the author from a sunshylit small (ca 2 m diam and 20 em deep) grass-lined pool filled with rainwater at Gainesville Florida

a common identification number with their 41h instar larval and pupal exuviae On subsequent visits to the site no additional Ps cyanescens were collected

Psorophora cyanescens (Coquillett) previously has been reported in Florida from the followshying counties Bay Duval Escambia Gadsden Hillsborough Jackson Leon Okaloosa Suwannee and Union (HT Evans Florida Mosquito Control Handbook 1994) On 26 May 1997 one 4h instar larva

Also collected from the pool were numerous larvae and pupae of Psorophora columbiae (Dyar and Knab) Aedes vexans (Meigen) and Culex salinarius Coquillett and 17 4h instar larvae of Psorophora ciliata (Fabricus) All immatures were individually reared and the resulting adults were linked by

John -Fmiddotmiddoteeinert is with Jlie CeMte(for Medicental middotAgricultural

aridVet$rih~rY Entomology u s ~ Department oFAgricul~umiddotre Agri-

26

culture~ 8e$earch Service 1600 1700 SW 23dDrive Gainesvillemiddotmiddot

bull lt middot bullbullbull _ bull bull middot J

Florida 32604 middot middot middot

REGISTRATION FOR WORLD DIRECTORY OF ARTHROPOD VECTOR RESEARCH AND CONTROL SPECIALISTS

In order to update the Directory we would appreciate your completing this form Please type or print and return it to the address listed below We would also appreciate your copying this form and supplyshying it to any colleagues who are working in this field Your cooperation will allow greater communication and efficiency within our profession

Name (Last or family name) (First or given name)

Title of present position ----------- Nationality

Present Address _______________________________ _

Telephone (Work) _____ (Home) _____ Fax ______ E-mail _______ _

DEGREES DATE UNIVERSITY

Languages understood Specialty ------------

Professional society affiliations AMCA __ SOVE __ ESA __ ASTMH __ RSTMH __ ESC __

Other ______________________ _

Please return by Air Mail to Dr Eugene Gerberg Chairman AMCA International Affairs Committee 5819 NW 57th Way Gainesville FL 32653-3257 USA

Fall1997

Date completed

Were Sales VW ampR s professional educated experienced staff knows and understands the vector control industry You can count on us to be there when you need us

Were Service VW ampR has over 70 locations across the United States and Mexico that offer convenient local vector control products Count on our professional and knowledgeable industry experts to assist you in finding solutions to your problems

Were Support bull VWampRs web site is designed to provide you with the latest

industry information Visit PestWeb for labels slides MSDSs industry news and weather reports

bull ChemCare provides you with chemical waste management solutions liSTW

bull Our licensed instructors are teaching t I~middot middotmiddot 1~ middot bull seminars in classrooms across the nation bull~middot-w~ You can count on us to he p you stay current

Were Serving the Vector Control Industry bull Btis granules liquid

sand wettable powder b1iquettes dunks

bull Larvicide oils bull UL V foggers bull Sprayers bull Fyfanon bull Natural Pyrethrin

WereVWampR

bull Resmethrin bullDibrom bull Hantavirus live traps bull Diluent oils bull Safety equipment bull Light traps bull Thermal foggers

Call Your Local VWampR Office At

1-800-888-4VWR Van Waters amp Roge~s Inc

We re More Than Just A Distributor

The Best Products including ABATE As American

Cyanamid exits the mosquito control market we are honored to be the exclusive formulashytor and distributor of ABATE products

to only a middotWarning label The new amendshyed labels also allow 1 2 and 5 Skeeter ABATE to be used as a pre-hatch in breeding and floodplain areas And now all Skeeter

in the United States ABATE has always been a

great choice for effective conshytrol and now its even better

ABATE ABATE products are regisshytered to be applied using aerial equipment as well making this reliable prodshy

All 5 Skeeter ABATE labels have been amended down from a Danger classification

uct as versatile as it is effective

Call for a copy of the new label

The Finest Equipment Professionals count on the raw power of the 18 hp

GRIZZLY to get tough jobs done right the first time Fully loaded everything is standard on this workhorse

bull High Performance IHPLAT nozzle bull Electric start bull Fully remote operation

THE WORLD NEEDS

-bull Automatic engine idle-back MOSQUITO CONTROL-

(iCLARKE 1-800-323-5727

Clarke Mosquito Control Products Inc bull Clarke Engineering Technologies Inc

1(~~ PO Box 60005 Fort Myers FL 33906

ADDRESS CORRECTION REQUESTED

email clarkecmosquitocom web wwwcmosquitocom

1 bullbull )1 bullbullbull 1111 11 bullbullbullbull 11 1 bullbull 111 bullbullbull 111 bullbullbull 111 bullbullbull 11 bullbullbullbull 11 1 R1chard Da r s 1e Florida Medic a l Entomology Laborator y 200 9th St SE vera Beac h FL 32962-4657

BULK RATE US POSTAGE

PAID PERMIT 198 IT MYERS FL

Page 18: Wing Beats Volume 8 Number 3wingbeats.floridamosquito.org/Wingbeats/pdfs/Vol8No3.pdf · 2014. 4. 11. · Stan Cope, Norfolk, VA Betsy Field, Vero Beach, FL John Gamble, New Smyrna

In order to control or eradicate vector-borne disease the world Health Organization launched a substantial program of research on the screening evaluation and deshyvelopment of pesticides for the conshytrol of disease vectors and human pests in the early 1960s This proshygram of research and development continued into the 1970s Various collaboration centers and WHO regional research laboratories were involved in this multiphasic evaluashytion and research program This program was later designated as WHO-PES (WHO Pesticides Evaluation Scheme) which inshycluded laboratory screening of new pesticides and their formulations and finally small-scale and largeshyscale village field trials where effishycacy safety and feasibility of applishycation were studied Additionally whenever possible impact on the level of endemic diseases was also assessed The 41

h phase of this scheme addressed specification of pesticides and their formulations to be used in vector control

The WHO-PES program evenshytually came to a halt in the eighties and with restructuring of the vector Biology and Control Division in WHO this program came to a grinding halt It soon became apshyparent that member countries carshyrying on substantial vector control programs especially mosquito conshytrol operations soon reached the stage when appropriate tools and strategies for use in operational programs became quite scarce Member countries put forward deshymands for the development of more effective and safer chemical and

20 Fa111997

biological control measures To reshyspond to this global demand the Division of Control of Tropical Disshyeases (CTD) at WHO reinvigorated the WHO-PES Program by holding an informal consultation on the Evaluation and Testing of Insectishycides on October 1996 where I was asked to serve as the Chairperson of the consultation Copies of the report of this Consultation can be obtained from Dr Zaim Morteza whose address appears at the end of this article

As a result of the Informal Conshysultation and other discussions held at WHO regarding the future need for public health pesticides CTD recently (1996) launched the GCDPP program This is indeed a crucial program which requires colshylaboration among national and inshyternational agencies research inshystitutions industry and regulatory agencies The main objectives elshyements and scope of this program are briefly discussed below

The main objectives of the GCDPP program are

bull To facilitate the search for alternative pesticides including mishycrobial pesticides as well as applishycation methodologies

bull To advise on the relative priority of activities within the manshydate of GCDPP

bull To advise on issues related to the development and use of pesshyticides and application equipment within the context of WHOs global disease control strategies

bull To promote harmonization of activities related to pesticide deshyvelopment and safe use

bull To promote and encourage the highest quality of work through appropriate resource mobilization

bull GCDPP will serve as an advisory group to CTDWHOPES in matters of pesticide developshyment safe and proper use and apshyplication equipment

Membership and Meetings

A number of agencies organishyzations and manufacturers of pesshyticides and application equipment will become members of GCDPP as well as foundations and WHO Collaborating Centers Other groups and -organizations involved in manufacturing pest manageshyment and crop protection will also be invited Attempts will be made to maximize representation but at the same time ensure appropriate balance In addition to the above distinguished scientists and direcshytors of WHO Regional Offices may also be invited to attend the meetshyings of GCDPP

GCDPP will provide a forum for the exchange of technical informashytion and oversee the WHO-PES biennial plan and collaboration with other organizations and institutions GCDPP will meet every other year in Geneva Switzerland Informal consultation meetings on specific topics will be convened as the need arises CTD will be responsible for the organization of such meetings

continued on page 25

We re global leaders in of mosquito adulticide our most important mission is maintainshying the very high standards of quality you demand to protect the health of the people in your charge

In the war agai nst mosquitoes

were w1nn1ng

middot AgrEvo UClaf we spe lion each year on research and develshyopment The fruits of this effort have included the highly successful Scourge and Permanonereg brands as well as the active ingredients for many other high-

reveal n compounds you can rely on us to bring the best of them to market in the shortshyest safest time Its what being a world leader is all about

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bull Dust-free means less waste during formulation and application and a cleaner end product- something your customers will appreciate

bull Chemically neutral BIODAC can be used with a wide range of pesticides

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Virtually Dust-Free

BIODACreg

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How many of you know the names Norma Jean Baker Cornelius Magillicutty dichloroshydiphenyl-trichloro-ethane Haliaeetus leucocephalus and its distant relative Taxodium distichum How about Aedes albopictus Well if you are willing to bet $100 you know all six withshyout looking at the answers then you are either very bright very old well read or have too much time on your hands If you know only one I hope its the Asian tiger mosquito What if for the remaining five I gave you the hints of Some Like it Hot baseball legend insecticide whiteshyheaded bird and tree with knees The older ones amongst us and thats getting to be a higher percentshyage each year should recognize Marilyn Monroe and Connie Mack for the first two All of you should be ashamed of yourself if you dont recognized DDT The last two reshylated by name only are Bald Eagle and Bald Cypress If you got both of those you are probably psychic and also know what the point of this article is

And what is the point of this arshyticle the need for common names for mosquitoes Most of us know the birds plants and mammals by their common names Why then must we for the most part use scishyentific names for mosquitoes There are other names that would be more meaningful easier to spell and certainly easier to pronounce Ill bet my $100 right now that 50 of us couldnt spell Toxorhynchites or taeniorhynchus in a spelling bee Thank goodness Aedes abopictus had a catchy common name when

- bull bull -middot ~ bull middot- ~ bull ~ bull

it became established in the US in 1985 Never mind that the common name conjured up all sorts of wrong impressions Asian tiger mosquito was a lot easier for the public and press and I dare say most mosshyquito control practitioners to undershystand and remember Also our friends at the Entomological Socishyety had the accepted common name as Forest Day mosquito but to their credit they changed it to what every one calls it the Asian tiger mosquito

So despite their scientific bent scientists can be influenced to change their minds If common names and abbreviations too didnt have a purpose that is to help us to communicate then we would all be saying too many long boring and confusing sentences Consider the following For years Cornelius Magillicutty sprayed his back yard with dichloro-diphenylshytrichloro-ethane for Aedes abopictus and then years later with Norma Jean Baker at his side watched the thin-shelled eggs of Haliaeetus leucocephalus drop out of 500-year old Taxodium distichum that he loved so much Yawn

Its that kind of phraseology that keeps people including some scishyentists from reading the scientific literature When trying to commushynicate any word or phrase that your listener doesnt know or understand tends to confuse them annoy them or make them feel inferior and that often makes them stop listening Communicating with the public has become a major mosquito control activity in recent years When com-

municating with the public scientific terms and jargon are neither desirshyable or necessary Mosquito control activities can be explained in very simple terms We could use the term Bacillus thuringiensis var israeensis instead of BTl but how many of us do Telling the average person SLE is an arbovirus doesnt give them any more information than telling them its a virus

And whats with this italics stuff for scientific names Ask people (inshycluding you perhaps) why we italishycize scientific names and most will probably guess that its to emphashysis the term Wrong If you care why look it up Lets forget it from now on OK If you cant write Culex quinquefasciatus without italics then consider my alternative-comshymon names that dont need to be italicized

The Entomological Society of America has a committee that conshysiders and usually rejects proshyposed official common names for insects There are only 14 mosshyquitoes on that list and I dare say most of us dont use most of them The problem with this list is that it was developed by scientists and everyone knows that all scientists are mad not just those in the movshyies Scientists want to do things in a scientific manner-logical meshythodical and precise Just because the entomological journals will only let you use accepted common names in their pages doesnt mean we cant use other common names in presentations and io print and we should

Fall1997 23

What we need is a list of comshymon names that the average mosshyquito control practitioner uses No one that anyone takes seriously will say they found some Culex pipiens quinquefasciatus (note no italics) in a polluted pond Most will say quinks Sure we can capitalize Quinks if it makes you feel better it does me So why are we afraid to write Quinks in our reports or say Quinks in formal talks Most people probably dont say quinks (see I dont insist on capitalization) because they think it makes them sound unprofessional Quinks is a distinctive short easy to rememshyber and fun to say name it has a beat that you can dance to and I give it a 99 Does anyone you know call quinks the southern house mosquito the accepted common name How about northern house mosquito for pipiens

Taenies or taenys or whatshyever spelling you want to use is easily recognized by east and south coast mosquito people as the comshymon name for Aedes taeniorhynchus one of the saltmarsh mosquitoes Again its a distinctive short easy to rememshyber and fun name It also describes the size of the species somewhat small or teeny-a bonus And who doesnt use Tox as the common name for our other spelling bee example

We dont hesitate to use comshymon names for a group of mosquishytoes that breed in a particular habishytat In addition to saltmarsh mosshyquitoes we refer to floodwater mosquitoes (which incidently also describes many saltmarsh mosquishytoes) tree hole mosquitoes dirty water mosquitoes grey water mosshyquitoes freshwater mosquitoes container-breeding mosquitoes pasture mosquitoes rock hole mosshyquitoes crab hole mosquitoes and on and on These habitat names are not mutually exclusive For exshyample pasture mosquitoes are also floodwater mosquitoes and fresh-

24 Fall1997

water mosquitoes By the way the translation of floodwater mosquito according to the Entomological Soshyciety is Aedes sticticus What Habitat names are also convenient for discussions among people from different geographic areas For example nature tends to give the same qualities to mosquitoes that breed in tree holes regardless of whether they are tree holes in Calishyfornia Virginia Queensland or Borneo From an operational mosshyquito control standpoint knowing the habitat of the mosquito can be more informative than knowing its scientific name

So lets consider some common names of species that we might use One common pest and potenshytial vector species that needs a common name is Coquillettidia perturbans (I think Ive weaned myself from italics) the aggressive biter whose larvae attach to the roots of aquatic plants particularly cattails (I could have said Typha species) Cattail mosquito is a natural even though larvae may attach to a variety of plants Another name could be the salt and pepshyper mosquito or another name taken from its scientific name could be the perturbing mosquito

How about the Anopheles The accepted common name for Anopheles quadrimaculatus is the common malaria mosquito This may have been accurate when malaria was a problem in this counshytry but now neither malaria nor this mosquito is common in this counshytry Im sure most of our hypothetishycal naming committee made up of operational mosquito controllers would call them quads

We have already dealt with Quinks Another obvious common name for another Culex Cx salinarius is sally or sallys or sallies Culex restuans is a little more tricky but how about rusty Rusty is suggestive of the color of the mosquito and it is similar to

resty a name that just doesnt sound right to me

Aedes vexans a common floodshywater mosquito in much of the US needs a common name The acshycepted common name vexans mosquito would be OK if most people know what vexing means And if they do why not call it the vexing mosquito Calling Aedes aegypti in the US by its accepted name the yellowfever mosquito is misleading Yellow fever has been absent from the US since right after the turn of the century Aegypti or gyps is often used by field and lab workers so why not adopt those terms

I could go on and on but Im more interested in what you think If you will send me your common names (keep it clean please) for any species you are familiar with Ill be happy to compile them and report back in a future article in Wing Beats (Theres that italics again different reason) If they appear in Wing Beats maybe just maybe we can call them official common names You can fax me at 561-778-7204 or E-mail me at cdmognvifas ufledu By the way you can address the message to Charlie Chas or Char The only person I insist call me doctor is my ex-wife and I would rather she didnt call me at all

-C_h~ulie M~rtis middot is an Assoshy _ciate middotPi~fesso( at the Unishy versity ~f floridas Medical Eiitomology Laboratory middot hi middot middot

Verq Beach Fiorida~

continued from page 20

providing support for report prepashyration and other documents and perform secretarial functions

Funding

In order to advance the objecshytives of GCDPP a stable source of funding will be necessary WHO CTD (WHO-Division of Control of Tropical Diseases) will establish and administer a trust fund which will be designated as GCDPP-Trust Fund which will be administered according to the WHO financial rules regulations and practices

The trust fund will be used to convene meetings production and dissemination of documents exshychange and dissemination of inforshymation on the need for public health pesticides and equipment and for activities which will promote the development and use of alternative safe compounds or application equipment

1James of organizations institushytions foundations manufacturers and individuals participating and contributing to this program will be listed Each participant will be enshycouraged to make annual contribushytions to the trust fund

Further Information

For further information on WHOshyPES or GCDPP contact Dr Zaim Morteza WHO-PES CTD World Health Organ ization 1211 Geneva 27 Switzerland E-mail zaimmwhoch

Nlir smiddotMulla is a Profes-sor with the Deparfrilent of ~nt-oshy_mologyUniverslty at califor middot -nia Riversidemiddot CA92521 middot _ middot middot

-

middotMulla= Receives -middot

Recognition Awar(j _

Mir S Mulla Professor of Entoshymology Department of Entomolshyogy University of California Rivershyside CA was presented the Scishyence Society of Thailand~ Meritoshyrious Recognition Award by the Thailand Minister of Science and Technology last October

Mulla an authority on insects of medical and public health imporshytance was cited for his efforts and leadership in organizing the First International Symposium on Biopesticides convened at Naresuan University in Thailand This symposium attended by some 300 participants from 20 countries covered biodiversity safety toxicshyity efficacy and proper use of biopesticides based on natural products and pathogenic organshyisms The proceedings of this first symposium amounting to 300 pages will be published soon

Mulla informs us that the 2nd International Symposium on Biopesticides will be held in late October 1998 on Langkawi Island off the coast of Malaysia Anyone interested in receiving further inforshymation regarding the proceedings or the second symposium should contact Dr Mulla at tel (909) 787-5818 fax (909) 787-4210 and eshymail mulla mailucredu

AMMIA INC ~

lOUt citie4 ~ ~ and ~ COVERAGES OFFERED

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Aviation Chemical Liability

Fall1997 25

Notice Psotophora middotgtcyaneseens collect~d middotin Aiachua County FL

- ~

and 9 pupae of this species were collected by the author from a sunshylit small (ca 2 m diam and 20 em deep) grass-lined pool filled with rainwater at Gainesville Florida

a common identification number with their 41h instar larval and pupal exuviae On subsequent visits to the site no additional Ps cyanescens were collected

Psorophora cyanescens (Coquillett) previously has been reported in Florida from the followshying counties Bay Duval Escambia Gadsden Hillsborough Jackson Leon Okaloosa Suwannee and Union (HT Evans Florida Mosquito Control Handbook 1994) On 26 May 1997 one 4h instar larva

Also collected from the pool were numerous larvae and pupae of Psorophora columbiae (Dyar and Knab) Aedes vexans (Meigen) and Culex salinarius Coquillett and 17 4h instar larvae of Psorophora ciliata (Fabricus) All immatures were individually reared and the resulting adults were linked by

John -Fmiddotmiddoteeinert is with Jlie CeMte(for Medicental middotAgricultural

aridVet$rih~rY Entomology u s ~ Department oFAgricul~umiddotre Agri-

26

culture~ 8e$earch Service 1600 1700 SW 23dDrive Gainesvillemiddotmiddot

bull lt middot bullbullbull _ bull bull middot J

Florida 32604 middot middot middot

REGISTRATION FOR WORLD DIRECTORY OF ARTHROPOD VECTOR RESEARCH AND CONTROL SPECIALISTS

In order to update the Directory we would appreciate your completing this form Please type or print and return it to the address listed below We would also appreciate your copying this form and supplyshying it to any colleagues who are working in this field Your cooperation will allow greater communication and efficiency within our profession

Name (Last or family name) (First or given name)

Title of present position ----------- Nationality

Present Address _______________________________ _

Telephone (Work) _____ (Home) _____ Fax ______ E-mail _______ _

DEGREES DATE UNIVERSITY

Languages understood Specialty ------------

Professional society affiliations AMCA __ SOVE __ ESA __ ASTMH __ RSTMH __ ESC __

Other ______________________ _

Please return by Air Mail to Dr Eugene Gerberg Chairman AMCA International Affairs Committee 5819 NW 57th Way Gainesville FL 32653-3257 USA

Fall1997

Date completed

Were Sales VW ampR s professional educated experienced staff knows and understands the vector control industry You can count on us to be there when you need us

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to only a middotWarning label The new amendshyed labels also allow 1 2 and 5 Skeeter ABATE to be used as a pre-hatch in breeding and floodplain areas And now all Skeeter

in the United States ABATE has always been a

great choice for effective conshytrol and now its even better

ABATE ABATE products are regisshytered to be applied using aerial equipment as well making this reliable prodshy

All 5 Skeeter ABATE labels have been amended down from a Danger classification

uct as versatile as it is effective

Call for a copy of the new label

The Finest Equipment Professionals count on the raw power of the 18 hp

GRIZZLY to get tough jobs done right the first time Fully loaded everything is standard on this workhorse

bull High Performance IHPLAT nozzle bull Electric start bull Fully remote operation

THE WORLD NEEDS

-bull Automatic engine idle-back MOSQUITO CONTROL-

(iCLARKE 1-800-323-5727

Clarke Mosquito Control Products Inc bull Clarke Engineering Technologies Inc

1(~~ PO Box 60005 Fort Myers FL 33906

ADDRESS CORRECTION REQUESTED

email clarkecmosquitocom web wwwcmosquitocom

1 bullbull )1 bullbullbull 1111 11 bullbullbullbull 11 1 bullbull 111 bullbullbull 111 bullbullbull 111 bullbullbull 11 bullbullbullbull 11 1 R1chard Da r s 1e Florida Medic a l Entomology Laborator y 200 9th St SE vera Beac h FL 32962-4657

BULK RATE US POSTAGE

PAID PERMIT 198 IT MYERS FL

Page 19: Wing Beats Volume 8 Number 3wingbeats.floridamosquito.org/Wingbeats/pdfs/Vol8No3.pdf · 2014. 4. 11. · Stan Cope, Norfolk, VA Betsy Field, Vero Beach, FL John Gamble, New Smyrna

We re global leaders in of mosquito adulticide our most important mission is maintainshying the very high standards of quality you demand to protect the health of the people in your charge

In the war agai nst mosquitoes

were w1nn1ng

middot AgrEvo UClaf we spe lion each year on research and develshyopment The fruits of this effort have included the highly successful Scourge and Permanonereg brands as well as the active ingredients for many other high-

reveal n compounds you can rely on us to bring the best of them to market in the shortshyest safest time Its what being a world leader is all about

AgrEvo Environmental Health bull 95 Chestnut Ridge Road bull Montvale NJ 07645 bull 1-800-843-1702

Knowing youre using BIODACreg the only virtually dust-free carrier

bull BIODACreg delivers a cleaner more productive work environment

bull Dust-free means less waste during formulation and application and a cleaner end product- something your customers will appreciate

bull Chemically neutral BIODAC can be used with a wide range of pesticides

Put BIODAC to work in your environment Call today at 2192725303 or fax at 219272661 0

Virtually Dust-Free

BIODACreg

GranTekmc ISO 9002 certified

A subs idiary of Thermo Fibergen I nc a Thermo Fibertek compa ny

Pro-Mist UL V Sprayers

A Different

Breed Of

_ __

Sprayer All Electric bull Ultra Quiet Light Weightmiddot Modular

Rugged bull Chemically Efficient ~-----F-r ~-

FACTORY DIRECT

Beecomist SALES amp SERVICE

Beecomist Systems 3255 Meetinghouse Rd bull Telford PA bull18969 USA

IN US 800-220-0787 OTHER CALLS 215-721-9424

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~ ~

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WJtclt~s ~111 bull bull 1ame bull

How many of you know the names Norma Jean Baker Cornelius Magillicutty dichloroshydiphenyl-trichloro-ethane Haliaeetus leucocephalus and its distant relative Taxodium distichum How about Aedes albopictus Well if you are willing to bet $100 you know all six withshyout looking at the answers then you are either very bright very old well read or have too much time on your hands If you know only one I hope its the Asian tiger mosquito What if for the remaining five I gave you the hints of Some Like it Hot baseball legend insecticide whiteshyheaded bird and tree with knees The older ones amongst us and thats getting to be a higher percentshyage each year should recognize Marilyn Monroe and Connie Mack for the first two All of you should be ashamed of yourself if you dont recognized DDT The last two reshylated by name only are Bald Eagle and Bald Cypress If you got both of those you are probably psychic and also know what the point of this article is

And what is the point of this arshyticle the need for common names for mosquitoes Most of us know the birds plants and mammals by their common names Why then must we for the most part use scishyentific names for mosquitoes There are other names that would be more meaningful easier to spell and certainly easier to pronounce Ill bet my $100 right now that 50 of us couldnt spell Toxorhynchites or taeniorhynchus in a spelling bee Thank goodness Aedes abopictus had a catchy common name when

- bull bull -middot ~ bull middot- ~ bull ~ bull

it became established in the US in 1985 Never mind that the common name conjured up all sorts of wrong impressions Asian tiger mosquito was a lot easier for the public and press and I dare say most mosshyquito control practitioners to undershystand and remember Also our friends at the Entomological Socishyety had the accepted common name as Forest Day mosquito but to their credit they changed it to what every one calls it the Asian tiger mosquito

So despite their scientific bent scientists can be influenced to change their minds If common names and abbreviations too didnt have a purpose that is to help us to communicate then we would all be saying too many long boring and confusing sentences Consider the following For years Cornelius Magillicutty sprayed his back yard with dichloro-diphenylshytrichloro-ethane for Aedes abopictus and then years later with Norma Jean Baker at his side watched the thin-shelled eggs of Haliaeetus leucocephalus drop out of 500-year old Taxodium distichum that he loved so much Yawn

Its that kind of phraseology that keeps people including some scishyentists from reading the scientific literature When trying to commushynicate any word or phrase that your listener doesnt know or understand tends to confuse them annoy them or make them feel inferior and that often makes them stop listening Communicating with the public has become a major mosquito control activity in recent years When com-

municating with the public scientific terms and jargon are neither desirshyable or necessary Mosquito control activities can be explained in very simple terms We could use the term Bacillus thuringiensis var israeensis instead of BTl but how many of us do Telling the average person SLE is an arbovirus doesnt give them any more information than telling them its a virus

And whats with this italics stuff for scientific names Ask people (inshycluding you perhaps) why we italishycize scientific names and most will probably guess that its to emphashysis the term Wrong If you care why look it up Lets forget it from now on OK If you cant write Culex quinquefasciatus without italics then consider my alternative-comshymon names that dont need to be italicized

The Entomological Society of America has a committee that conshysiders and usually rejects proshyposed official common names for insects There are only 14 mosshyquitoes on that list and I dare say most of us dont use most of them The problem with this list is that it was developed by scientists and everyone knows that all scientists are mad not just those in the movshyies Scientists want to do things in a scientific manner-logical meshythodical and precise Just because the entomological journals will only let you use accepted common names in their pages doesnt mean we cant use other common names in presentations and io print and we should

Fall1997 23

What we need is a list of comshymon names that the average mosshyquito control practitioner uses No one that anyone takes seriously will say they found some Culex pipiens quinquefasciatus (note no italics) in a polluted pond Most will say quinks Sure we can capitalize Quinks if it makes you feel better it does me So why are we afraid to write Quinks in our reports or say Quinks in formal talks Most people probably dont say quinks (see I dont insist on capitalization) because they think it makes them sound unprofessional Quinks is a distinctive short easy to rememshyber and fun to say name it has a beat that you can dance to and I give it a 99 Does anyone you know call quinks the southern house mosquito the accepted common name How about northern house mosquito for pipiens

Taenies or taenys or whatshyever spelling you want to use is easily recognized by east and south coast mosquito people as the comshymon name for Aedes taeniorhynchus one of the saltmarsh mosquitoes Again its a distinctive short easy to rememshyber and fun name It also describes the size of the species somewhat small or teeny-a bonus And who doesnt use Tox as the common name for our other spelling bee example

We dont hesitate to use comshymon names for a group of mosquishytoes that breed in a particular habishytat In addition to saltmarsh mosshyquitoes we refer to floodwater mosquitoes (which incidently also describes many saltmarsh mosquishytoes) tree hole mosquitoes dirty water mosquitoes grey water mosshyquitoes freshwater mosquitoes container-breeding mosquitoes pasture mosquitoes rock hole mosshyquitoes crab hole mosquitoes and on and on These habitat names are not mutually exclusive For exshyample pasture mosquitoes are also floodwater mosquitoes and fresh-

24 Fall1997

water mosquitoes By the way the translation of floodwater mosquito according to the Entomological Soshyciety is Aedes sticticus What Habitat names are also convenient for discussions among people from different geographic areas For example nature tends to give the same qualities to mosquitoes that breed in tree holes regardless of whether they are tree holes in Calishyfornia Virginia Queensland or Borneo From an operational mosshyquito control standpoint knowing the habitat of the mosquito can be more informative than knowing its scientific name

So lets consider some common names of species that we might use One common pest and potenshytial vector species that needs a common name is Coquillettidia perturbans (I think Ive weaned myself from italics) the aggressive biter whose larvae attach to the roots of aquatic plants particularly cattails (I could have said Typha species) Cattail mosquito is a natural even though larvae may attach to a variety of plants Another name could be the salt and pepshyper mosquito or another name taken from its scientific name could be the perturbing mosquito

How about the Anopheles The accepted common name for Anopheles quadrimaculatus is the common malaria mosquito This may have been accurate when malaria was a problem in this counshytry but now neither malaria nor this mosquito is common in this counshytry Im sure most of our hypothetishycal naming committee made up of operational mosquito controllers would call them quads

We have already dealt with Quinks Another obvious common name for another Culex Cx salinarius is sally or sallys or sallies Culex restuans is a little more tricky but how about rusty Rusty is suggestive of the color of the mosquito and it is similar to

resty a name that just doesnt sound right to me

Aedes vexans a common floodshywater mosquito in much of the US needs a common name The acshycepted common name vexans mosquito would be OK if most people know what vexing means And if they do why not call it the vexing mosquito Calling Aedes aegypti in the US by its accepted name the yellowfever mosquito is misleading Yellow fever has been absent from the US since right after the turn of the century Aegypti or gyps is often used by field and lab workers so why not adopt those terms

I could go on and on but Im more interested in what you think If you will send me your common names (keep it clean please) for any species you are familiar with Ill be happy to compile them and report back in a future article in Wing Beats (Theres that italics again different reason) If they appear in Wing Beats maybe just maybe we can call them official common names You can fax me at 561-778-7204 or E-mail me at cdmognvifas ufledu By the way you can address the message to Charlie Chas or Char The only person I insist call me doctor is my ex-wife and I would rather she didnt call me at all

-C_h~ulie M~rtis middot is an Assoshy _ciate middotPi~fesso( at the Unishy versity ~f floridas Medical Eiitomology Laboratory middot hi middot middot

Verq Beach Fiorida~

continued from page 20

providing support for report prepashyration and other documents and perform secretarial functions

Funding

In order to advance the objecshytives of GCDPP a stable source of funding will be necessary WHO CTD (WHO-Division of Control of Tropical Diseases) will establish and administer a trust fund which will be designated as GCDPP-Trust Fund which will be administered according to the WHO financial rules regulations and practices

The trust fund will be used to convene meetings production and dissemination of documents exshychange and dissemination of inforshymation on the need for public health pesticides and equipment and for activities which will promote the development and use of alternative safe compounds or application equipment

1James of organizations institushytions foundations manufacturers and individuals participating and contributing to this program will be listed Each participant will be enshycouraged to make annual contribushytions to the trust fund

Further Information

For further information on WHOshyPES or GCDPP contact Dr Zaim Morteza WHO-PES CTD World Health Organ ization 1211 Geneva 27 Switzerland E-mail zaimmwhoch

Nlir smiddotMulla is a Profes-sor with the Deparfrilent of ~nt-oshy_mologyUniverslty at califor middot -nia Riversidemiddot CA92521 middot _ middot middot

-

middotMulla= Receives -middot

Recognition Awar(j _

Mir S Mulla Professor of Entoshymology Department of Entomolshyogy University of California Rivershyside CA was presented the Scishyence Society of Thailand~ Meritoshyrious Recognition Award by the Thailand Minister of Science and Technology last October

Mulla an authority on insects of medical and public health imporshytance was cited for his efforts and leadership in organizing the First International Symposium on Biopesticides convened at Naresuan University in Thailand This symposium attended by some 300 participants from 20 countries covered biodiversity safety toxicshyity efficacy and proper use of biopesticides based on natural products and pathogenic organshyisms The proceedings of this first symposium amounting to 300 pages will be published soon

Mulla informs us that the 2nd International Symposium on Biopesticides will be held in late October 1998 on Langkawi Island off the coast of Malaysia Anyone interested in receiving further inforshymation regarding the proceedings or the second symposium should contact Dr Mulla at tel (909) 787-5818 fax (909) 787-4210 and eshymail mulla mailucredu

AMMIA INC ~

lOUt citie4 ~ ~ and ~ COVERAGES OFFERED

(a~ ~ CtJfte and~ ~ ~ C(4t General Liability

at ~ ~ ~- Public Officials Liabili ty

PROGRAM ADMINISTRATOR SOUTHWEST ASSURANCE CORPORATION 12730 NEW BRITTANY BLVD SUITE 304 FORT MYERS FLORIDA 33907-3646

(941) 939-7303 FAX (941) 939 -1485

Automobile Liability

Aviation Liability

Aviation Hull (including theft)

Aviation Chemical Liability

Fall1997 25

Notice Psotophora middotgtcyaneseens collect~d middotin Aiachua County FL

- ~

and 9 pupae of this species were collected by the author from a sunshylit small (ca 2 m diam and 20 em deep) grass-lined pool filled with rainwater at Gainesville Florida

a common identification number with their 41h instar larval and pupal exuviae On subsequent visits to the site no additional Ps cyanescens were collected

Psorophora cyanescens (Coquillett) previously has been reported in Florida from the followshying counties Bay Duval Escambia Gadsden Hillsborough Jackson Leon Okaloosa Suwannee and Union (HT Evans Florida Mosquito Control Handbook 1994) On 26 May 1997 one 4h instar larva

Also collected from the pool were numerous larvae and pupae of Psorophora columbiae (Dyar and Knab) Aedes vexans (Meigen) and Culex salinarius Coquillett and 17 4h instar larvae of Psorophora ciliata (Fabricus) All immatures were individually reared and the resulting adults were linked by

John -Fmiddotmiddoteeinert is with Jlie CeMte(for Medicental middotAgricultural

aridVet$rih~rY Entomology u s ~ Department oFAgricul~umiddotre Agri-

26

culture~ 8e$earch Service 1600 1700 SW 23dDrive Gainesvillemiddotmiddot

bull lt middot bullbullbull _ bull bull middot J

Florida 32604 middot middot middot

REGISTRATION FOR WORLD DIRECTORY OF ARTHROPOD VECTOR RESEARCH AND CONTROL SPECIALISTS

In order to update the Directory we would appreciate your completing this form Please type or print and return it to the address listed below We would also appreciate your copying this form and supplyshying it to any colleagues who are working in this field Your cooperation will allow greater communication and efficiency within our profession

Name (Last or family name) (First or given name)

Title of present position ----------- Nationality

Present Address _______________________________ _

Telephone (Work) _____ (Home) _____ Fax ______ E-mail _______ _

DEGREES DATE UNIVERSITY

Languages understood Specialty ------------

Professional society affiliations AMCA __ SOVE __ ESA __ ASTMH __ RSTMH __ ESC __

Other ______________________ _

Please return by Air Mail to Dr Eugene Gerberg Chairman AMCA International Affairs Committee 5819 NW 57th Way Gainesville FL 32653-3257 USA

Fall1997

Date completed

Were Sales VW ampR s professional educated experienced staff knows and understands the vector control industry You can count on us to be there when you need us

Were Service VW ampR has over 70 locations across the United States and Mexico that offer convenient local vector control products Count on our professional and knowledgeable industry experts to assist you in finding solutions to your problems

Were Support bull VWampRs web site is designed to provide you with the latest

industry information Visit PestWeb for labels slides MSDSs industry news and weather reports

bull ChemCare provides you with chemical waste management solutions liSTW

bull Our licensed instructors are teaching t I~middot middotmiddot 1~ middot bull seminars in classrooms across the nation bull~middot-w~ You can count on us to he p you stay current

Were Serving the Vector Control Industry bull Btis granules liquid

sand wettable powder b1iquettes dunks

bull Larvicide oils bull UL V foggers bull Sprayers bull Fyfanon bull Natural Pyrethrin

WereVWampR

bull Resmethrin bullDibrom bull Hantavirus live traps bull Diluent oils bull Safety equipment bull Light traps bull Thermal foggers

Call Your Local VWampR Office At

1-800-888-4VWR Van Waters amp Roge~s Inc

We re More Than Just A Distributor

The Best Products including ABATE As American

Cyanamid exits the mosquito control market we are honored to be the exclusive formulashytor and distributor of ABATE products

to only a middotWarning label The new amendshyed labels also allow 1 2 and 5 Skeeter ABATE to be used as a pre-hatch in breeding and floodplain areas And now all Skeeter

in the United States ABATE has always been a

great choice for effective conshytrol and now its even better

ABATE ABATE products are regisshytered to be applied using aerial equipment as well making this reliable prodshy

All 5 Skeeter ABATE labels have been amended down from a Danger classification

uct as versatile as it is effective

Call for a copy of the new label

The Finest Equipment Professionals count on the raw power of the 18 hp

GRIZZLY to get tough jobs done right the first time Fully loaded everything is standard on this workhorse

bull High Performance IHPLAT nozzle bull Electric start bull Fully remote operation

THE WORLD NEEDS

-bull Automatic engine idle-back MOSQUITO CONTROL-

(iCLARKE 1-800-323-5727

Clarke Mosquito Control Products Inc bull Clarke Engineering Technologies Inc

1(~~ PO Box 60005 Fort Myers FL 33906

ADDRESS CORRECTION REQUESTED

email clarkecmosquitocom web wwwcmosquitocom

1 bullbull )1 bullbullbull 1111 11 bullbullbullbull 11 1 bullbull 111 bullbullbull 111 bullbullbull 111 bullbullbull 11 bullbullbullbull 11 1 R1chard Da r s 1e Florida Medic a l Entomology Laborator y 200 9th St SE vera Beac h FL 32962-4657

BULK RATE US POSTAGE

PAID PERMIT 198 IT MYERS FL

Page 20: Wing Beats Volume 8 Number 3wingbeats.floridamosquito.org/Wingbeats/pdfs/Vol8No3.pdf · 2014. 4. 11. · Stan Cope, Norfolk, VA Betsy Field, Vero Beach, FL John Gamble, New Smyrna

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IN US 800-220-0787 OTHER CALLS 215-721-9424

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~ ~

middotmiddot~ ~ middot middot ~ middot~middot- middotmiddot bull middot middot ~ middott ~ - ~

WJtclt~s ~111 bull bull 1ame bull

How many of you know the names Norma Jean Baker Cornelius Magillicutty dichloroshydiphenyl-trichloro-ethane Haliaeetus leucocephalus and its distant relative Taxodium distichum How about Aedes albopictus Well if you are willing to bet $100 you know all six withshyout looking at the answers then you are either very bright very old well read or have too much time on your hands If you know only one I hope its the Asian tiger mosquito What if for the remaining five I gave you the hints of Some Like it Hot baseball legend insecticide whiteshyheaded bird and tree with knees The older ones amongst us and thats getting to be a higher percentshyage each year should recognize Marilyn Monroe and Connie Mack for the first two All of you should be ashamed of yourself if you dont recognized DDT The last two reshylated by name only are Bald Eagle and Bald Cypress If you got both of those you are probably psychic and also know what the point of this article is

And what is the point of this arshyticle the need for common names for mosquitoes Most of us know the birds plants and mammals by their common names Why then must we for the most part use scishyentific names for mosquitoes There are other names that would be more meaningful easier to spell and certainly easier to pronounce Ill bet my $100 right now that 50 of us couldnt spell Toxorhynchites or taeniorhynchus in a spelling bee Thank goodness Aedes abopictus had a catchy common name when

- bull bull -middot ~ bull middot- ~ bull ~ bull

it became established in the US in 1985 Never mind that the common name conjured up all sorts of wrong impressions Asian tiger mosquito was a lot easier for the public and press and I dare say most mosshyquito control practitioners to undershystand and remember Also our friends at the Entomological Socishyety had the accepted common name as Forest Day mosquito but to their credit they changed it to what every one calls it the Asian tiger mosquito

So despite their scientific bent scientists can be influenced to change their minds If common names and abbreviations too didnt have a purpose that is to help us to communicate then we would all be saying too many long boring and confusing sentences Consider the following For years Cornelius Magillicutty sprayed his back yard with dichloro-diphenylshytrichloro-ethane for Aedes abopictus and then years later with Norma Jean Baker at his side watched the thin-shelled eggs of Haliaeetus leucocephalus drop out of 500-year old Taxodium distichum that he loved so much Yawn

Its that kind of phraseology that keeps people including some scishyentists from reading the scientific literature When trying to commushynicate any word or phrase that your listener doesnt know or understand tends to confuse them annoy them or make them feel inferior and that often makes them stop listening Communicating with the public has become a major mosquito control activity in recent years When com-

municating with the public scientific terms and jargon are neither desirshyable or necessary Mosquito control activities can be explained in very simple terms We could use the term Bacillus thuringiensis var israeensis instead of BTl but how many of us do Telling the average person SLE is an arbovirus doesnt give them any more information than telling them its a virus

And whats with this italics stuff for scientific names Ask people (inshycluding you perhaps) why we italishycize scientific names and most will probably guess that its to emphashysis the term Wrong If you care why look it up Lets forget it from now on OK If you cant write Culex quinquefasciatus without italics then consider my alternative-comshymon names that dont need to be italicized

The Entomological Society of America has a committee that conshysiders and usually rejects proshyposed official common names for insects There are only 14 mosshyquitoes on that list and I dare say most of us dont use most of them The problem with this list is that it was developed by scientists and everyone knows that all scientists are mad not just those in the movshyies Scientists want to do things in a scientific manner-logical meshythodical and precise Just because the entomological journals will only let you use accepted common names in their pages doesnt mean we cant use other common names in presentations and io print and we should

Fall1997 23

What we need is a list of comshymon names that the average mosshyquito control practitioner uses No one that anyone takes seriously will say they found some Culex pipiens quinquefasciatus (note no italics) in a polluted pond Most will say quinks Sure we can capitalize Quinks if it makes you feel better it does me So why are we afraid to write Quinks in our reports or say Quinks in formal talks Most people probably dont say quinks (see I dont insist on capitalization) because they think it makes them sound unprofessional Quinks is a distinctive short easy to rememshyber and fun to say name it has a beat that you can dance to and I give it a 99 Does anyone you know call quinks the southern house mosquito the accepted common name How about northern house mosquito for pipiens

Taenies or taenys or whatshyever spelling you want to use is easily recognized by east and south coast mosquito people as the comshymon name for Aedes taeniorhynchus one of the saltmarsh mosquitoes Again its a distinctive short easy to rememshyber and fun name It also describes the size of the species somewhat small or teeny-a bonus And who doesnt use Tox as the common name for our other spelling bee example

We dont hesitate to use comshymon names for a group of mosquishytoes that breed in a particular habishytat In addition to saltmarsh mosshyquitoes we refer to floodwater mosquitoes (which incidently also describes many saltmarsh mosquishytoes) tree hole mosquitoes dirty water mosquitoes grey water mosshyquitoes freshwater mosquitoes container-breeding mosquitoes pasture mosquitoes rock hole mosshyquitoes crab hole mosquitoes and on and on These habitat names are not mutually exclusive For exshyample pasture mosquitoes are also floodwater mosquitoes and fresh-

24 Fall1997

water mosquitoes By the way the translation of floodwater mosquito according to the Entomological Soshyciety is Aedes sticticus What Habitat names are also convenient for discussions among people from different geographic areas For example nature tends to give the same qualities to mosquitoes that breed in tree holes regardless of whether they are tree holes in Calishyfornia Virginia Queensland or Borneo From an operational mosshyquito control standpoint knowing the habitat of the mosquito can be more informative than knowing its scientific name

So lets consider some common names of species that we might use One common pest and potenshytial vector species that needs a common name is Coquillettidia perturbans (I think Ive weaned myself from italics) the aggressive biter whose larvae attach to the roots of aquatic plants particularly cattails (I could have said Typha species) Cattail mosquito is a natural even though larvae may attach to a variety of plants Another name could be the salt and pepshyper mosquito or another name taken from its scientific name could be the perturbing mosquito

How about the Anopheles The accepted common name for Anopheles quadrimaculatus is the common malaria mosquito This may have been accurate when malaria was a problem in this counshytry but now neither malaria nor this mosquito is common in this counshytry Im sure most of our hypothetishycal naming committee made up of operational mosquito controllers would call them quads

We have already dealt with Quinks Another obvious common name for another Culex Cx salinarius is sally or sallys or sallies Culex restuans is a little more tricky but how about rusty Rusty is suggestive of the color of the mosquito and it is similar to

resty a name that just doesnt sound right to me

Aedes vexans a common floodshywater mosquito in much of the US needs a common name The acshycepted common name vexans mosquito would be OK if most people know what vexing means And if they do why not call it the vexing mosquito Calling Aedes aegypti in the US by its accepted name the yellowfever mosquito is misleading Yellow fever has been absent from the US since right after the turn of the century Aegypti or gyps is often used by field and lab workers so why not adopt those terms

I could go on and on but Im more interested in what you think If you will send me your common names (keep it clean please) for any species you are familiar with Ill be happy to compile them and report back in a future article in Wing Beats (Theres that italics again different reason) If they appear in Wing Beats maybe just maybe we can call them official common names You can fax me at 561-778-7204 or E-mail me at cdmognvifas ufledu By the way you can address the message to Charlie Chas or Char The only person I insist call me doctor is my ex-wife and I would rather she didnt call me at all

-C_h~ulie M~rtis middot is an Assoshy _ciate middotPi~fesso( at the Unishy versity ~f floridas Medical Eiitomology Laboratory middot hi middot middot

Verq Beach Fiorida~

continued from page 20

providing support for report prepashyration and other documents and perform secretarial functions

Funding

In order to advance the objecshytives of GCDPP a stable source of funding will be necessary WHO CTD (WHO-Division of Control of Tropical Diseases) will establish and administer a trust fund which will be designated as GCDPP-Trust Fund which will be administered according to the WHO financial rules regulations and practices

The trust fund will be used to convene meetings production and dissemination of documents exshychange and dissemination of inforshymation on the need for public health pesticides and equipment and for activities which will promote the development and use of alternative safe compounds or application equipment

1James of organizations institushytions foundations manufacturers and individuals participating and contributing to this program will be listed Each participant will be enshycouraged to make annual contribushytions to the trust fund

Further Information

For further information on WHOshyPES or GCDPP contact Dr Zaim Morteza WHO-PES CTD World Health Organ ization 1211 Geneva 27 Switzerland E-mail zaimmwhoch

Nlir smiddotMulla is a Profes-sor with the Deparfrilent of ~nt-oshy_mologyUniverslty at califor middot -nia Riversidemiddot CA92521 middot _ middot middot

-

middotMulla= Receives -middot

Recognition Awar(j _

Mir S Mulla Professor of Entoshymology Department of Entomolshyogy University of California Rivershyside CA was presented the Scishyence Society of Thailand~ Meritoshyrious Recognition Award by the Thailand Minister of Science and Technology last October

Mulla an authority on insects of medical and public health imporshytance was cited for his efforts and leadership in organizing the First International Symposium on Biopesticides convened at Naresuan University in Thailand This symposium attended by some 300 participants from 20 countries covered biodiversity safety toxicshyity efficacy and proper use of biopesticides based on natural products and pathogenic organshyisms The proceedings of this first symposium amounting to 300 pages will be published soon

Mulla informs us that the 2nd International Symposium on Biopesticides will be held in late October 1998 on Langkawi Island off the coast of Malaysia Anyone interested in receiving further inforshymation regarding the proceedings or the second symposium should contact Dr Mulla at tel (909) 787-5818 fax (909) 787-4210 and eshymail mulla mailucredu

AMMIA INC ~

lOUt citie4 ~ ~ and ~ COVERAGES OFFERED

(a~ ~ CtJfte and~ ~ ~ C(4t General Liability

at ~ ~ ~- Public Officials Liabili ty

PROGRAM ADMINISTRATOR SOUTHWEST ASSURANCE CORPORATION 12730 NEW BRITTANY BLVD SUITE 304 FORT MYERS FLORIDA 33907-3646

(941) 939-7303 FAX (941) 939 -1485

Automobile Liability

Aviation Liability

Aviation Hull (including theft)

Aviation Chemical Liability

Fall1997 25

Notice Psotophora middotgtcyaneseens collect~d middotin Aiachua County FL

- ~

and 9 pupae of this species were collected by the author from a sunshylit small (ca 2 m diam and 20 em deep) grass-lined pool filled with rainwater at Gainesville Florida

a common identification number with their 41h instar larval and pupal exuviae On subsequent visits to the site no additional Ps cyanescens were collected

Psorophora cyanescens (Coquillett) previously has been reported in Florida from the followshying counties Bay Duval Escambia Gadsden Hillsborough Jackson Leon Okaloosa Suwannee and Union (HT Evans Florida Mosquito Control Handbook 1994) On 26 May 1997 one 4h instar larva

Also collected from the pool were numerous larvae and pupae of Psorophora columbiae (Dyar and Knab) Aedes vexans (Meigen) and Culex salinarius Coquillett and 17 4h instar larvae of Psorophora ciliata (Fabricus) All immatures were individually reared and the resulting adults were linked by

John -Fmiddotmiddoteeinert is with Jlie CeMte(for Medicental middotAgricultural

aridVet$rih~rY Entomology u s ~ Department oFAgricul~umiddotre Agri-

26

culture~ 8e$earch Service 1600 1700 SW 23dDrive Gainesvillemiddotmiddot

bull lt middot bullbullbull _ bull bull middot J

Florida 32604 middot middot middot

REGISTRATION FOR WORLD DIRECTORY OF ARTHROPOD VECTOR RESEARCH AND CONTROL SPECIALISTS

In order to update the Directory we would appreciate your completing this form Please type or print and return it to the address listed below We would also appreciate your copying this form and supplyshying it to any colleagues who are working in this field Your cooperation will allow greater communication and efficiency within our profession

Name (Last or family name) (First or given name)

Title of present position ----------- Nationality

Present Address _______________________________ _

Telephone (Work) _____ (Home) _____ Fax ______ E-mail _______ _

DEGREES DATE UNIVERSITY

Languages understood Specialty ------------

Professional society affiliations AMCA __ SOVE __ ESA __ ASTMH __ RSTMH __ ESC __

Other ______________________ _

Please return by Air Mail to Dr Eugene Gerberg Chairman AMCA International Affairs Committee 5819 NW 57th Way Gainesville FL 32653-3257 USA

Fall1997

Date completed

Were Sales VW ampR s professional educated experienced staff knows and understands the vector control industry You can count on us to be there when you need us

Were Service VW ampR has over 70 locations across the United States and Mexico that offer convenient local vector control products Count on our professional and knowledgeable industry experts to assist you in finding solutions to your problems

Were Support bull VWampRs web site is designed to provide you with the latest

industry information Visit PestWeb for labels slides MSDSs industry news and weather reports

bull ChemCare provides you with chemical waste management solutions liSTW

bull Our licensed instructors are teaching t I~middot middotmiddot 1~ middot bull seminars in classrooms across the nation bull~middot-w~ You can count on us to he p you stay current

Were Serving the Vector Control Industry bull Btis granules liquid

sand wettable powder b1iquettes dunks

bull Larvicide oils bull UL V foggers bull Sprayers bull Fyfanon bull Natural Pyrethrin

WereVWampR

bull Resmethrin bullDibrom bull Hantavirus live traps bull Diluent oils bull Safety equipment bull Light traps bull Thermal foggers

Call Your Local VWampR Office At

1-800-888-4VWR Van Waters amp Roge~s Inc

We re More Than Just A Distributor

The Best Products including ABATE As American

Cyanamid exits the mosquito control market we are honored to be the exclusive formulashytor and distributor of ABATE products

to only a middotWarning label The new amendshyed labels also allow 1 2 and 5 Skeeter ABATE to be used as a pre-hatch in breeding and floodplain areas And now all Skeeter

in the United States ABATE has always been a

great choice for effective conshytrol and now its even better

ABATE ABATE products are regisshytered to be applied using aerial equipment as well making this reliable prodshy

All 5 Skeeter ABATE labels have been amended down from a Danger classification

uct as versatile as it is effective

Call for a copy of the new label

The Finest Equipment Professionals count on the raw power of the 18 hp

GRIZZLY to get tough jobs done right the first time Fully loaded everything is standard on this workhorse

bull High Performance IHPLAT nozzle bull Electric start bull Fully remote operation

THE WORLD NEEDS

-bull Automatic engine idle-back MOSQUITO CONTROL-

(iCLARKE 1-800-323-5727

Clarke Mosquito Control Products Inc bull Clarke Engineering Technologies Inc

1(~~ PO Box 60005 Fort Myers FL 33906

ADDRESS CORRECTION REQUESTED

email clarkecmosquitocom web wwwcmosquitocom

1 bullbull )1 bullbullbull 1111 11 bullbullbullbull 11 1 bullbull 111 bullbullbull 111 bullbullbull 111 bullbullbull 11 bullbullbullbull 11 1 R1chard Da r s 1e Florida Medic a l Entomology Laborator y 200 9th St SE vera Beac h FL 32962-4657

BULK RATE US POSTAGE

PAID PERMIT 198 IT MYERS FL

Page 21: Wing Beats Volume 8 Number 3wingbeats.floridamosquito.org/Wingbeats/pdfs/Vol8No3.pdf · 2014. 4. 11. · Stan Cope, Norfolk, VA Betsy Field, Vero Beach, FL John Gamble, New Smyrna

~ ~

middotmiddot~ ~ middot middot ~ middot~middot- middotmiddot bull middot middot ~ middott ~ - ~

WJtclt~s ~111 bull bull 1ame bull

How many of you know the names Norma Jean Baker Cornelius Magillicutty dichloroshydiphenyl-trichloro-ethane Haliaeetus leucocephalus and its distant relative Taxodium distichum How about Aedes albopictus Well if you are willing to bet $100 you know all six withshyout looking at the answers then you are either very bright very old well read or have too much time on your hands If you know only one I hope its the Asian tiger mosquito What if for the remaining five I gave you the hints of Some Like it Hot baseball legend insecticide whiteshyheaded bird and tree with knees The older ones amongst us and thats getting to be a higher percentshyage each year should recognize Marilyn Monroe and Connie Mack for the first two All of you should be ashamed of yourself if you dont recognized DDT The last two reshylated by name only are Bald Eagle and Bald Cypress If you got both of those you are probably psychic and also know what the point of this article is

And what is the point of this arshyticle the need for common names for mosquitoes Most of us know the birds plants and mammals by their common names Why then must we for the most part use scishyentific names for mosquitoes There are other names that would be more meaningful easier to spell and certainly easier to pronounce Ill bet my $100 right now that 50 of us couldnt spell Toxorhynchites or taeniorhynchus in a spelling bee Thank goodness Aedes abopictus had a catchy common name when

- bull bull -middot ~ bull middot- ~ bull ~ bull

it became established in the US in 1985 Never mind that the common name conjured up all sorts of wrong impressions Asian tiger mosquito was a lot easier for the public and press and I dare say most mosshyquito control practitioners to undershystand and remember Also our friends at the Entomological Socishyety had the accepted common name as Forest Day mosquito but to their credit they changed it to what every one calls it the Asian tiger mosquito

So despite their scientific bent scientists can be influenced to change their minds If common names and abbreviations too didnt have a purpose that is to help us to communicate then we would all be saying too many long boring and confusing sentences Consider the following For years Cornelius Magillicutty sprayed his back yard with dichloro-diphenylshytrichloro-ethane for Aedes abopictus and then years later with Norma Jean Baker at his side watched the thin-shelled eggs of Haliaeetus leucocephalus drop out of 500-year old Taxodium distichum that he loved so much Yawn

Its that kind of phraseology that keeps people including some scishyentists from reading the scientific literature When trying to commushynicate any word or phrase that your listener doesnt know or understand tends to confuse them annoy them or make them feel inferior and that often makes them stop listening Communicating with the public has become a major mosquito control activity in recent years When com-

municating with the public scientific terms and jargon are neither desirshyable or necessary Mosquito control activities can be explained in very simple terms We could use the term Bacillus thuringiensis var israeensis instead of BTl but how many of us do Telling the average person SLE is an arbovirus doesnt give them any more information than telling them its a virus

And whats with this italics stuff for scientific names Ask people (inshycluding you perhaps) why we italishycize scientific names and most will probably guess that its to emphashysis the term Wrong If you care why look it up Lets forget it from now on OK If you cant write Culex quinquefasciatus without italics then consider my alternative-comshymon names that dont need to be italicized

The Entomological Society of America has a committee that conshysiders and usually rejects proshyposed official common names for insects There are only 14 mosshyquitoes on that list and I dare say most of us dont use most of them The problem with this list is that it was developed by scientists and everyone knows that all scientists are mad not just those in the movshyies Scientists want to do things in a scientific manner-logical meshythodical and precise Just because the entomological journals will only let you use accepted common names in their pages doesnt mean we cant use other common names in presentations and io print and we should

Fall1997 23

What we need is a list of comshymon names that the average mosshyquito control practitioner uses No one that anyone takes seriously will say they found some Culex pipiens quinquefasciatus (note no italics) in a polluted pond Most will say quinks Sure we can capitalize Quinks if it makes you feel better it does me So why are we afraid to write Quinks in our reports or say Quinks in formal talks Most people probably dont say quinks (see I dont insist on capitalization) because they think it makes them sound unprofessional Quinks is a distinctive short easy to rememshyber and fun to say name it has a beat that you can dance to and I give it a 99 Does anyone you know call quinks the southern house mosquito the accepted common name How about northern house mosquito for pipiens

Taenies or taenys or whatshyever spelling you want to use is easily recognized by east and south coast mosquito people as the comshymon name for Aedes taeniorhynchus one of the saltmarsh mosquitoes Again its a distinctive short easy to rememshyber and fun name It also describes the size of the species somewhat small or teeny-a bonus And who doesnt use Tox as the common name for our other spelling bee example

We dont hesitate to use comshymon names for a group of mosquishytoes that breed in a particular habishytat In addition to saltmarsh mosshyquitoes we refer to floodwater mosquitoes (which incidently also describes many saltmarsh mosquishytoes) tree hole mosquitoes dirty water mosquitoes grey water mosshyquitoes freshwater mosquitoes container-breeding mosquitoes pasture mosquitoes rock hole mosshyquitoes crab hole mosquitoes and on and on These habitat names are not mutually exclusive For exshyample pasture mosquitoes are also floodwater mosquitoes and fresh-

24 Fall1997

water mosquitoes By the way the translation of floodwater mosquito according to the Entomological Soshyciety is Aedes sticticus What Habitat names are also convenient for discussions among people from different geographic areas For example nature tends to give the same qualities to mosquitoes that breed in tree holes regardless of whether they are tree holes in Calishyfornia Virginia Queensland or Borneo From an operational mosshyquito control standpoint knowing the habitat of the mosquito can be more informative than knowing its scientific name

So lets consider some common names of species that we might use One common pest and potenshytial vector species that needs a common name is Coquillettidia perturbans (I think Ive weaned myself from italics) the aggressive biter whose larvae attach to the roots of aquatic plants particularly cattails (I could have said Typha species) Cattail mosquito is a natural even though larvae may attach to a variety of plants Another name could be the salt and pepshyper mosquito or another name taken from its scientific name could be the perturbing mosquito

How about the Anopheles The accepted common name for Anopheles quadrimaculatus is the common malaria mosquito This may have been accurate when malaria was a problem in this counshytry but now neither malaria nor this mosquito is common in this counshytry Im sure most of our hypothetishycal naming committee made up of operational mosquito controllers would call them quads

We have already dealt with Quinks Another obvious common name for another Culex Cx salinarius is sally or sallys or sallies Culex restuans is a little more tricky but how about rusty Rusty is suggestive of the color of the mosquito and it is similar to

resty a name that just doesnt sound right to me

Aedes vexans a common floodshywater mosquito in much of the US needs a common name The acshycepted common name vexans mosquito would be OK if most people know what vexing means And if they do why not call it the vexing mosquito Calling Aedes aegypti in the US by its accepted name the yellowfever mosquito is misleading Yellow fever has been absent from the US since right after the turn of the century Aegypti or gyps is often used by field and lab workers so why not adopt those terms

I could go on and on but Im more interested in what you think If you will send me your common names (keep it clean please) for any species you are familiar with Ill be happy to compile them and report back in a future article in Wing Beats (Theres that italics again different reason) If they appear in Wing Beats maybe just maybe we can call them official common names You can fax me at 561-778-7204 or E-mail me at cdmognvifas ufledu By the way you can address the message to Charlie Chas or Char The only person I insist call me doctor is my ex-wife and I would rather she didnt call me at all

-C_h~ulie M~rtis middot is an Assoshy _ciate middotPi~fesso( at the Unishy versity ~f floridas Medical Eiitomology Laboratory middot hi middot middot

Verq Beach Fiorida~

continued from page 20

providing support for report prepashyration and other documents and perform secretarial functions

Funding

In order to advance the objecshytives of GCDPP a stable source of funding will be necessary WHO CTD (WHO-Division of Control of Tropical Diseases) will establish and administer a trust fund which will be designated as GCDPP-Trust Fund which will be administered according to the WHO financial rules regulations and practices

The trust fund will be used to convene meetings production and dissemination of documents exshychange and dissemination of inforshymation on the need for public health pesticides and equipment and for activities which will promote the development and use of alternative safe compounds or application equipment

1James of organizations institushytions foundations manufacturers and individuals participating and contributing to this program will be listed Each participant will be enshycouraged to make annual contribushytions to the trust fund

Further Information

For further information on WHOshyPES or GCDPP contact Dr Zaim Morteza WHO-PES CTD World Health Organ ization 1211 Geneva 27 Switzerland E-mail zaimmwhoch

Nlir smiddotMulla is a Profes-sor with the Deparfrilent of ~nt-oshy_mologyUniverslty at califor middot -nia Riversidemiddot CA92521 middot _ middot middot

-

middotMulla= Receives -middot

Recognition Awar(j _

Mir S Mulla Professor of Entoshymology Department of Entomolshyogy University of California Rivershyside CA was presented the Scishyence Society of Thailand~ Meritoshyrious Recognition Award by the Thailand Minister of Science and Technology last October

Mulla an authority on insects of medical and public health imporshytance was cited for his efforts and leadership in organizing the First International Symposium on Biopesticides convened at Naresuan University in Thailand This symposium attended by some 300 participants from 20 countries covered biodiversity safety toxicshyity efficacy and proper use of biopesticides based on natural products and pathogenic organshyisms The proceedings of this first symposium amounting to 300 pages will be published soon

Mulla informs us that the 2nd International Symposium on Biopesticides will be held in late October 1998 on Langkawi Island off the coast of Malaysia Anyone interested in receiving further inforshymation regarding the proceedings or the second symposium should contact Dr Mulla at tel (909) 787-5818 fax (909) 787-4210 and eshymail mulla mailucredu

AMMIA INC ~

lOUt citie4 ~ ~ and ~ COVERAGES OFFERED

(a~ ~ CtJfte and~ ~ ~ C(4t General Liability

at ~ ~ ~- Public Officials Liabili ty

PROGRAM ADMINISTRATOR SOUTHWEST ASSURANCE CORPORATION 12730 NEW BRITTANY BLVD SUITE 304 FORT MYERS FLORIDA 33907-3646

(941) 939-7303 FAX (941) 939 -1485

Automobile Liability

Aviation Liability

Aviation Hull (including theft)

Aviation Chemical Liability

Fall1997 25

Notice Psotophora middotgtcyaneseens collect~d middotin Aiachua County FL

- ~

and 9 pupae of this species were collected by the author from a sunshylit small (ca 2 m diam and 20 em deep) grass-lined pool filled with rainwater at Gainesville Florida

a common identification number with their 41h instar larval and pupal exuviae On subsequent visits to the site no additional Ps cyanescens were collected

Psorophora cyanescens (Coquillett) previously has been reported in Florida from the followshying counties Bay Duval Escambia Gadsden Hillsborough Jackson Leon Okaloosa Suwannee and Union (HT Evans Florida Mosquito Control Handbook 1994) On 26 May 1997 one 4h instar larva

Also collected from the pool were numerous larvae and pupae of Psorophora columbiae (Dyar and Knab) Aedes vexans (Meigen) and Culex salinarius Coquillett and 17 4h instar larvae of Psorophora ciliata (Fabricus) All immatures were individually reared and the resulting adults were linked by

John -Fmiddotmiddoteeinert is with Jlie CeMte(for Medicental middotAgricultural

aridVet$rih~rY Entomology u s ~ Department oFAgricul~umiddotre Agri-

26

culture~ 8e$earch Service 1600 1700 SW 23dDrive Gainesvillemiddotmiddot

bull lt middot bullbullbull _ bull bull middot J

Florida 32604 middot middot middot

REGISTRATION FOR WORLD DIRECTORY OF ARTHROPOD VECTOR RESEARCH AND CONTROL SPECIALISTS

In order to update the Directory we would appreciate your completing this form Please type or print and return it to the address listed below We would also appreciate your copying this form and supplyshying it to any colleagues who are working in this field Your cooperation will allow greater communication and efficiency within our profession

Name (Last or family name) (First or given name)

Title of present position ----------- Nationality

Present Address _______________________________ _

Telephone (Work) _____ (Home) _____ Fax ______ E-mail _______ _

DEGREES DATE UNIVERSITY

Languages understood Specialty ------------

Professional society affiliations AMCA __ SOVE __ ESA __ ASTMH __ RSTMH __ ESC __

Other ______________________ _

Please return by Air Mail to Dr Eugene Gerberg Chairman AMCA International Affairs Committee 5819 NW 57th Way Gainesville FL 32653-3257 USA

Fall1997

Date completed

Were Sales VW ampR s professional educated experienced staff knows and understands the vector control industry You can count on us to be there when you need us

Were Service VW ampR has over 70 locations across the United States and Mexico that offer convenient local vector control products Count on our professional and knowledgeable industry experts to assist you in finding solutions to your problems

Were Support bull VWampRs web site is designed to provide you with the latest

industry information Visit PestWeb for labels slides MSDSs industry news and weather reports

bull ChemCare provides you with chemical waste management solutions liSTW

bull Our licensed instructors are teaching t I~middot middotmiddot 1~ middot bull seminars in classrooms across the nation bull~middot-w~ You can count on us to he p you stay current

Were Serving the Vector Control Industry bull Btis granules liquid

sand wettable powder b1iquettes dunks

bull Larvicide oils bull UL V foggers bull Sprayers bull Fyfanon bull Natural Pyrethrin

WereVWampR

bull Resmethrin bullDibrom bull Hantavirus live traps bull Diluent oils bull Safety equipment bull Light traps bull Thermal foggers

Call Your Local VWampR Office At

1-800-888-4VWR Van Waters amp Roge~s Inc

We re More Than Just A Distributor

The Best Products including ABATE As American

Cyanamid exits the mosquito control market we are honored to be the exclusive formulashytor and distributor of ABATE products

to only a middotWarning label The new amendshyed labels also allow 1 2 and 5 Skeeter ABATE to be used as a pre-hatch in breeding and floodplain areas And now all Skeeter

in the United States ABATE has always been a

great choice for effective conshytrol and now its even better

ABATE ABATE products are regisshytered to be applied using aerial equipment as well making this reliable prodshy

All 5 Skeeter ABATE labels have been amended down from a Danger classification

uct as versatile as it is effective

Call for a copy of the new label

The Finest Equipment Professionals count on the raw power of the 18 hp

GRIZZLY to get tough jobs done right the first time Fully loaded everything is standard on this workhorse

bull High Performance IHPLAT nozzle bull Electric start bull Fully remote operation

THE WORLD NEEDS

-bull Automatic engine idle-back MOSQUITO CONTROL-

(iCLARKE 1-800-323-5727

Clarke Mosquito Control Products Inc bull Clarke Engineering Technologies Inc

1(~~ PO Box 60005 Fort Myers FL 33906

ADDRESS CORRECTION REQUESTED

email clarkecmosquitocom web wwwcmosquitocom

1 bullbull )1 bullbullbull 1111 11 bullbullbullbull 11 1 bullbull 111 bullbullbull 111 bullbullbull 111 bullbullbull 11 bullbullbullbull 11 1 R1chard Da r s 1e Florida Medic a l Entomology Laborator y 200 9th St SE vera Beac h FL 32962-4657

BULK RATE US POSTAGE

PAID PERMIT 198 IT MYERS FL

Page 22: Wing Beats Volume 8 Number 3wingbeats.floridamosquito.org/Wingbeats/pdfs/Vol8No3.pdf · 2014. 4. 11. · Stan Cope, Norfolk, VA Betsy Field, Vero Beach, FL John Gamble, New Smyrna

What we need is a list of comshymon names that the average mosshyquito control practitioner uses No one that anyone takes seriously will say they found some Culex pipiens quinquefasciatus (note no italics) in a polluted pond Most will say quinks Sure we can capitalize Quinks if it makes you feel better it does me So why are we afraid to write Quinks in our reports or say Quinks in formal talks Most people probably dont say quinks (see I dont insist on capitalization) because they think it makes them sound unprofessional Quinks is a distinctive short easy to rememshyber and fun to say name it has a beat that you can dance to and I give it a 99 Does anyone you know call quinks the southern house mosquito the accepted common name How about northern house mosquito for pipiens

Taenies or taenys or whatshyever spelling you want to use is easily recognized by east and south coast mosquito people as the comshymon name for Aedes taeniorhynchus one of the saltmarsh mosquitoes Again its a distinctive short easy to rememshyber and fun name It also describes the size of the species somewhat small or teeny-a bonus And who doesnt use Tox as the common name for our other spelling bee example

We dont hesitate to use comshymon names for a group of mosquishytoes that breed in a particular habishytat In addition to saltmarsh mosshyquitoes we refer to floodwater mosquitoes (which incidently also describes many saltmarsh mosquishytoes) tree hole mosquitoes dirty water mosquitoes grey water mosshyquitoes freshwater mosquitoes container-breeding mosquitoes pasture mosquitoes rock hole mosshyquitoes crab hole mosquitoes and on and on These habitat names are not mutually exclusive For exshyample pasture mosquitoes are also floodwater mosquitoes and fresh-

24 Fall1997

water mosquitoes By the way the translation of floodwater mosquito according to the Entomological Soshyciety is Aedes sticticus What Habitat names are also convenient for discussions among people from different geographic areas For example nature tends to give the same qualities to mosquitoes that breed in tree holes regardless of whether they are tree holes in Calishyfornia Virginia Queensland or Borneo From an operational mosshyquito control standpoint knowing the habitat of the mosquito can be more informative than knowing its scientific name

So lets consider some common names of species that we might use One common pest and potenshytial vector species that needs a common name is Coquillettidia perturbans (I think Ive weaned myself from italics) the aggressive biter whose larvae attach to the roots of aquatic plants particularly cattails (I could have said Typha species) Cattail mosquito is a natural even though larvae may attach to a variety of plants Another name could be the salt and pepshyper mosquito or another name taken from its scientific name could be the perturbing mosquito

How about the Anopheles The accepted common name for Anopheles quadrimaculatus is the common malaria mosquito This may have been accurate when malaria was a problem in this counshytry but now neither malaria nor this mosquito is common in this counshytry Im sure most of our hypothetishycal naming committee made up of operational mosquito controllers would call them quads

We have already dealt with Quinks Another obvious common name for another Culex Cx salinarius is sally or sallys or sallies Culex restuans is a little more tricky but how about rusty Rusty is suggestive of the color of the mosquito and it is similar to

resty a name that just doesnt sound right to me

Aedes vexans a common floodshywater mosquito in much of the US needs a common name The acshycepted common name vexans mosquito would be OK if most people know what vexing means And if they do why not call it the vexing mosquito Calling Aedes aegypti in the US by its accepted name the yellowfever mosquito is misleading Yellow fever has been absent from the US since right after the turn of the century Aegypti or gyps is often used by field and lab workers so why not adopt those terms

I could go on and on but Im more interested in what you think If you will send me your common names (keep it clean please) for any species you are familiar with Ill be happy to compile them and report back in a future article in Wing Beats (Theres that italics again different reason) If they appear in Wing Beats maybe just maybe we can call them official common names You can fax me at 561-778-7204 or E-mail me at cdmognvifas ufledu By the way you can address the message to Charlie Chas or Char The only person I insist call me doctor is my ex-wife and I would rather she didnt call me at all

-C_h~ulie M~rtis middot is an Assoshy _ciate middotPi~fesso( at the Unishy versity ~f floridas Medical Eiitomology Laboratory middot hi middot middot

Verq Beach Fiorida~

continued from page 20

providing support for report prepashyration and other documents and perform secretarial functions

Funding

In order to advance the objecshytives of GCDPP a stable source of funding will be necessary WHO CTD (WHO-Division of Control of Tropical Diseases) will establish and administer a trust fund which will be designated as GCDPP-Trust Fund which will be administered according to the WHO financial rules regulations and practices

The trust fund will be used to convene meetings production and dissemination of documents exshychange and dissemination of inforshymation on the need for public health pesticides and equipment and for activities which will promote the development and use of alternative safe compounds or application equipment

1James of organizations institushytions foundations manufacturers and individuals participating and contributing to this program will be listed Each participant will be enshycouraged to make annual contribushytions to the trust fund

Further Information

For further information on WHOshyPES or GCDPP contact Dr Zaim Morteza WHO-PES CTD World Health Organ ization 1211 Geneva 27 Switzerland E-mail zaimmwhoch

Nlir smiddotMulla is a Profes-sor with the Deparfrilent of ~nt-oshy_mologyUniverslty at califor middot -nia Riversidemiddot CA92521 middot _ middot middot

-

middotMulla= Receives -middot

Recognition Awar(j _

Mir S Mulla Professor of Entoshymology Department of Entomolshyogy University of California Rivershyside CA was presented the Scishyence Society of Thailand~ Meritoshyrious Recognition Award by the Thailand Minister of Science and Technology last October

Mulla an authority on insects of medical and public health imporshytance was cited for his efforts and leadership in organizing the First International Symposium on Biopesticides convened at Naresuan University in Thailand This symposium attended by some 300 participants from 20 countries covered biodiversity safety toxicshyity efficacy and proper use of biopesticides based on natural products and pathogenic organshyisms The proceedings of this first symposium amounting to 300 pages will be published soon

Mulla informs us that the 2nd International Symposium on Biopesticides will be held in late October 1998 on Langkawi Island off the coast of Malaysia Anyone interested in receiving further inforshymation regarding the proceedings or the second symposium should contact Dr Mulla at tel (909) 787-5818 fax (909) 787-4210 and eshymail mulla mailucredu

AMMIA INC ~

lOUt citie4 ~ ~ and ~ COVERAGES OFFERED

(a~ ~ CtJfte and~ ~ ~ C(4t General Liability

at ~ ~ ~- Public Officials Liabili ty

PROGRAM ADMINISTRATOR SOUTHWEST ASSURANCE CORPORATION 12730 NEW BRITTANY BLVD SUITE 304 FORT MYERS FLORIDA 33907-3646

(941) 939-7303 FAX (941) 939 -1485

Automobile Liability

Aviation Liability

Aviation Hull (including theft)

Aviation Chemical Liability

Fall1997 25

Notice Psotophora middotgtcyaneseens collect~d middotin Aiachua County FL

- ~

and 9 pupae of this species were collected by the author from a sunshylit small (ca 2 m diam and 20 em deep) grass-lined pool filled with rainwater at Gainesville Florida

a common identification number with their 41h instar larval and pupal exuviae On subsequent visits to the site no additional Ps cyanescens were collected

Psorophora cyanescens (Coquillett) previously has been reported in Florida from the followshying counties Bay Duval Escambia Gadsden Hillsborough Jackson Leon Okaloosa Suwannee and Union (HT Evans Florida Mosquito Control Handbook 1994) On 26 May 1997 one 4h instar larva

Also collected from the pool were numerous larvae and pupae of Psorophora columbiae (Dyar and Knab) Aedes vexans (Meigen) and Culex salinarius Coquillett and 17 4h instar larvae of Psorophora ciliata (Fabricus) All immatures were individually reared and the resulting adults were linked by

John -Fmiddotmiddoteeinert is with Jlie CeMte(for Medicental middotAgricultural

aridVet$rih~rY Entomology u s ~ Department oFAgricul~umiddotre Agri-

26

culture~ 8e$earch Service 1600 1700 SW 23dDrive Gainesvillemiddotmiddot

bull lt middot bullbullbull _ bull bull middot J

Florida 32604 middot middot middot

REGISTRATION FOR WORLD DIRECTORY OF ARTHROPOD VECTOR RESEARCH AND CONTROL SPECIALISTS

In order to update the Directory we would appreciate your completing this form Please type or print and return it to the address listed below We would also appreciate your copying this form and supplyshying it to any colleagues who are working in this field Your cooperation will allow greater communication and efficiency within our profession

Name (Last or family name) (First or given name)

Title of present position ----------- Nationality

Present Address _______________________________ _

Telephone (Work) _____ (Home) _____ Fax ______ E-mail _______ _

DEGREES DATE UNIVERSITY

Languages understood Specialty ------------

Professional society affiliations AMCA __ SOVE __ ESA __ ASTMH __ RSTMH __ ESC __

Other ______________________ _

Please return by Air Mail to Dr Eugene Gerberg Chairman AMCA International Affairs Committee 5819 NW 57th Way Gainesville FL 32653-3257 USA

Fall1997

Date completed

Were Sales VW ampR s professional educated experienced staff knows and understands the vector control industry You can count on us to be there when you need us

Were Service VW ampR has over 70 locations across the United States and Mexico that offer convenient local vector control products Count on our professional and knowledgeable industry experts to assist you in finding solutions to your problems

Were Support bull VWampRs web site is designed to provide you with the latest

industry information Visit PestWeb for labels slides MSDSs industry news and weather reports

bull ChemCare provides you with chemical waste management solutions liSTW

bull Our licensed instructors are teaching t I~middot middotmiddot 1~ middot bull seminars in classrooms across the nation bull~middot-w~ You can count on us to he p you stay current

Were Serving the Vector Control Industry bull Btis granules liquid

sand wettable powder b1iquettes dunks

bull Larvicide oils bull UL V foggers bull Sprayers bull Fyfanon bull Natural Pyrethrin

WereVWampR

bull Resmethrin bullDibrom bull Hantavirus live traps bull Diluent oils bull Safety equipment bull Light traps bull Thermal foggers

Call Your Local VWampR Office At

1-800-888-4VWR Van Waters amp Roge~s Inc

We re More Than Just A Distributor

The Best Products including ABATE As American

Cyanamid exits the mosquito control market we are honored to be the exclusive formulashytor and distributor of ABATE products

to only a middotWarning label The new amendshyed labels also allow 1 2 and 5 Skeeter ABATE to be used as a pre-hatch in breeding and floodplain areas And now all Skeeter

in the United States ABATE has always been a

great choice for effective conshytrol and now its even better

ABATE ABATE products are regisshytered to be applied using aerial equipment as well making this reliable prodshy

All 5 Skeeter ABATE labels have been amended down from a Danger classification

uct as versatile as it is effective

Call for a copy of the new label

The Finest Equipment Professionals count on the raw power of the 18 hp

GRIZZLY to get tough jobs done right the first time Fully loaded everything is standard on this workhorse

bull High Performance IHPLAT nozzle bull Electric start bull Fully remote operation

THE WORLD NEEDS

-bull Automatic engine idle-back MOSQUITO CONTROL-

(iCLARKE 1-800-323-5727

Clarke Mosquito Control Products Inc bull Clarke Engineering Technologies Inc

1(~~ PO Box 60005 Fort Myers FL 33906

ADDRESS CORRECTION REQUESTED

email clarkecmosquitocom web wwwcmosquitocom

1 bullbull )1 bullbullbull 1111 11 bullbullbullbull 11 1 bullbull 111 bullbullbull 111 bullbullbull 111 bullbullbull 11 bullbullbullbull 11 1 R1chard Da r s 1e Florida Medic a l Entomology Laborator y 200 9th St SE vera Beac h FL 32962-4657

BULK RATE US POSTAGE

PAID PERMIT 198 IT MYERS FL

Page 23: Wing Beats Volume 8 Number 3wingbeats.floridamosquito.org/Wingbeats/pdfs/Vol8No3.pdf · 2014. 4. 11. · Stan Cope, Norfolk, VA Betsy Field, Vero Beach, FL John Gamble, New Smyrna

continued from page 20

providing support for report prepashyration and other documents and perform secretarial functions

Funding

In order to advance the objecshytives of GCDPP a stable source of funding will be necessary WHO CTD (WHO-Division of Control of Tropical Diseases) will establish and administer a trust fund which will be designated as GCDPP-Trust Fund which will be administered according to the WHO financial rules regulations and practices

The trust fund will be used to convene meetings production and dissemination of documents exshychange and dissemination of inforshymation on the need for public health pesticides and equipment and for activities which will promote the development and use of alternative safe compounds or application equipment

1James of organizations institushytions foundations manufacturers and individuals participating and contributing to this program will be listed Each participant will be enshycouraged to make annual contribushytions to the trust fund

Further Information

For further information on WHOshyPES or GCDPP contact Dr Zaim Morteza WHO-PES CTD World Health Organ ization 1211 Geneva 27 Switzerland E-mail zaimmwhoch

Nlir smiddotMulla is a Profes-sor with the Deparfrilent of ~nt-oshy_mologyUniverslty at califor middot -nia Riversidemiddot CA92521 middot _ middot middot

-

middotMulla= Receives -middot

Recognition Awar(j _

Mir S Mulla Professor of Entoshymology Department of Entomolshyogy University of California Rivershyside CA was presented the Scishyence Society of Thailand~ Meritoshyrious Recognition Award by the Thailand Minister of Science and Technology last October

Mulla an authority on insects of medical and public health imporshytance was cited for his efforts and leadership in organizing the First International Symposium on Biopesticides convened at Naresuan University in Thailand This symposium attended by some 300 participants from 20 countries covered biodiversity safety toxicshyity efficacy and proper use of biopesticides based on natural products and pathogenic organshyisms The proceedings of this first symposium amounting to 300 pages will be published soon

Mulla informs us that the 2nd International Symposium on Biopesticides will be held in late October 1998 on Langkawi Island off the coast of Malaysia Anyone interested in receiving further inforshymation regarding the proceedings or the second symposium should contact Dr Mulla at tel (909) 787-5818 fax (909) 787-4210 and eshymail mulla mailucredu

AMMIA INC ~

lOUt citie4 ~ ~ and ~ COVERAGES OFFERED

(a~ ~ CtJfte and~ ~ ~ C(4t General Liability

at ~ ~ ~- Public Officials Liabili ty

PROGRAM ADMINISTRATOR SOUTHWEST ASSURANCE CORPORATION 12730 NEW BRITTANY BLVD SUITE 304 FORT MYERS FLORIDA 33907-3646

(941) 939-7303 FAX (941) 939 -1485

Automobile Liability

Aviation Liability

Aviation Hull (including theft)

Aviation Chemical Liability

Fall1997 25

Notice Psotophora middotgtcyaneseens collect~d middotin Aiachua County FL

- ~

and 9 pupae of this species were collected by the author from a sunshylit small (ca 2 m diam and 20 em deep) grass-lined pool filled with rainwater at Gainesville Florida

a common identification number with their 41h instar larval and pupal exuviae On subsequent visits to the site no additional Ps cyanescens were collected

Psorophora cyanescens (Coquillett) previously has been reported in Florida from the followshying counties Bay Duval Escambia Gadsden Hillsborough Jackson Leon Okaloosa Suwannee and Union (HT Evans Florida Mosquito Control Handbook 1994) On 26 May 1997 one 4h instar larva

Also collected from the pool were numerous larvae and pupae of Psorophora columbiae (Dyar and Knab) Aedes vexans (Meigen) and Culex salinarius Coquillett and 17 4h instar larvae of Psorophora ciliata (Fabricus) All immatures were individually reared and the resulting adults were linked by

John -Fmiddotmiddoteeinert is with Jlie CeMte(for Medicental middotAgricultural

aridVet$rih~rY Entomology u s ~ Department oFAgricul~umiddotre Agri-

26

culture~ 8e$earch Service 1600 1700 SW 23dDrive Gainesvillemiddotmiddot

bull lt middot bullbullbull _ bull bull middot J

Florida 32604 middot middot middot

REGISTRATION FOR WORLD DIRECTORY OF ARTHROPOD VECTOR RESEARCH AND CONTROL SPECIALISTS

In order to update the Directory we would appreciate your completing this form Please type or print and return it to the address listed below We would also appreciate your copying this form and supplyshying it to any colleagues who are working in this field Your cooperation will allow greater communication and efficiency within our profession

Name (Last or family name) (First or given name)

Title of present position ----------- Nationality

Present Address _______________________________ _

Telephone (Work) _____ (Home) _____ Fax ______ E-mail _______ _

DEGREES DATE UNIVERSITY

Languages understood Specialty ------------

Professional society affiliations AMCA __ SOVE __ ESA __ ASTMH __ RSTMH __ ESC __

Other ______________________ _

Please return by Air Mail to Dr Eugene Gerberg Chairman AMCA International Affairs Committee 5819 NW 57th Way Gainesville FL 32653-3257 USA

Fall1997

Date completed

Were Sales VW ampR s professional educated experienced staff knows and understands the vector control industry You can count on us to be there when you need us

Were Service VW ampR has over 70 locations across the United States and Mexico that offer convenient local vector control products Count on our professional and knowledgeable industry experts to assist you in finding solutions to your problems

Were Support bull VWampRs web site is designed to provide you with the latest

industry information Visit PestWeb for labels slides MSDSs industry news and weather reports

bull ChemCare provides you with chemical waste management solutions liSTW

bull Our licensed instructors are teaching t I~middot middotmiddot 1~ middot bull seminars in classrooms across the nation bull~middot-w~ You can count on us to he p you stay current

Were Serving the Vector Control Industry bull Btis granules liquid

sand wettable powder b1iquettes dunks

bull Larvicide oils bull UL V foggers bull Sprayers bull Fyfanon bull Natural Pyrethrin

WereVWampR

bull Resmethrin bullDibrom bull Hantavirus live traps bull Diluent oils bull Safety equipment bull Light traps bull Thermal foggers

Call Your Local VWampR Office At

1-800-888-4VWR Van Waters amp Roge~s Inc

We re More Than Just A Distributor

The Best Products including ABATE As American

Cyanamid exits the mosquito control market we are honored to be the exclusive formulashytor and distributor of ABATE products

to only a middotWarning label The new amendshyed labels also allow 1 2 and 5 Skeeter ABATE to be used as a pre-hatch in breeding and floodplain areas And now all Skeeter

in the United States ABATE has always been a

great choice for effective conshytrol and now its even better

ABATE ABATE products are regisshytered to be applied using aerial equipment as well making this reliable prodshy

All 5 Skeeter ABATE labels have been amended down from a Danger classification

uct as versatile as it is effective

Call for a copy of the new label

The Finest Equipment Professionals count on the raw power of the 18 hp

GRIZZLY to get tough jobs done right the first time Fully loaded everything is standard on this workhorse

bull High Performance IHPLAT nozzle bull Electric start bull Fully remote operation

THE WORLD NEEDS

-bull Automatic engine idle-back MOSQUITO CONTROL-

(iCLARKE 1-800-323-5727

Clarke Mosquito Control Products Inc bull Clarke Engineering Technologies Inc

1(~~ PO Box 60005 Fort Myers FL 33906

ADDRESS CORRECTION REQUESTED

email clarkecmosquitocom web wwwcmosquitocom

1 bullbull )1 bullbullbull 1111 11 bullbullbullbull 11 1 bullbull 111 bullbullbull 111 bullbullbull 111 bullbullbull 11 bullbullbullbull 11 1 R1chard Da r s 1e Florida Medic a l Entomology Laborator y 200 9th St SE vera Beac h FL 32962-4657

BULK RATE US POSTAGE

PAID PERMIT 198 IT MYERS FL

Page 24: Wing Beats Volume 8 Number 3wingbeats.floridamosquito.org/Wingbeats/pdfs/Vol8No3.pdf · 2014. 4. 11. · Stan Cope, Norfolk, VA Betsy Field, Vero Beach, FL John Gamble, New Smyrna

Notice Psotophora middotgtcyaneseens collect~d middotin Aiachua County FL

- ~

and 9 pupae of this species were collected by the author from a sunshylit small (ca 2 m diam and 20 em deep) grass-lined pool filled with rainwater at Gainesville Florida

a common identification number with their 41h instar larval and pupal exuviae On subsequent visits to the site no additional Ps cyanescens were collected

Psorophora cyanescens (Coquillett) previously has been reported in Florida from the followshying counties Bay Duval Escambia Gadsden Hillsborough Jackson Leon Okaloosa Suwannee and Union (HT Evans Florida Mosquito Control Handbook 1994) On 26 May 1997 one 4h instar larva

Also collected from the pool were numerous larvae and pupae of Psorophora columbiae (Dyar and Knab) Aedes vexans (Meigen) and Culex salinarius Coquillett and 17 4h instar larvae of Psorophora ciliata (Fabricus) All immatures were individually reared and the resulting adults were linked by

John -Fmiddotmiddoteeinert is with Jlie CeMte(for Medicental middotAgricultural

aridVet$rih~rY Entomology u s ~ Department oFAgricul~umiddotre Agri-

26

culture~ 8e$earch Service 1600 1700 SW 23dDrive Gainesvillemiddotmiddot

bull lt middot bullbullbull _ bull bull middot J

Florida 32604 middot middot middot

REGISTRATION FOR WORLD DIRECTORY OF ARTHROPOD VECTOR RESEARCH AND CONTROL SPECIALISTS

In order to update the Directory we would appreciate your completing this form Please type or print and return it to the address listed below We would also appreciate your copying this form and supplyshying it to any colleagues who are working in this field Your cooperation will allow greater communication and efficiency within our profession

Name (Last or family name) (First or given name)

Title of present position ----------- Nationality

Present Address _______________________________ _

Telephone (Work) _____ (Home) _____ Fax ______ E-mail _______ _

DEGREES DATE UNIVERSITY

Languages understood Specialty ------------

Professional society affiliations AMCA __ SOVE __ ESA __ ASTMH __ RSTMH __ ESC __

Other ______________________ _

Please return by Air Mail to Dr Eugene Gerberg Chairman AMCA International Affairs Committee 5819 NW 57th Way Gainesville FL 32653-3257 USA

Fall1997

Date completed

Were Sales VW ampR s professional educated experienced staff knows and understands the vector control industry You can count on us to be there when you need us

Were Service VW ampR has over 70 locations across the United States and Mexico that offer convenient local vector control products Count on our professional and knowledgeable industry experts to assist you in finding solutions to your problems

Were Support bull VWampRs web site is designed to provide you with the latest

industry information Visit PestWeb for labels slides MSDSs industry news and weather reports

bull ChemCare provides you with chemical waste management solutions liSTW

bull Our licensed instructors are teaching t I~middot middotmiddot 1~ middot bull seminars in classrooms across the nation bull~middot-w~ You can count on us to he p you stay current

Were Serving the Vector Control Industry bull Btis granules liquid

sand wettable powder b1iquettes dunks

bull Larvicide oils bull UL V foggers bull Sprayers bull Fyfanon bull Natural Pyrethrin

WereVWampR

bull Resmethrin bullDibrom bull Hantavirus live traps bull Diluent oils bull Safety equipment bull Light traps bull Thermal foggers

Call Your Local VWampR Office At

1-800-888-4VWR Van Waters amp Roge~s Inc

We re More Than Just A Distributor

The Best Products including ABATE As American

Cyanamid exits the mosquito control market we are honored to be the exclusive formulashytor and distributor of ABATE products

to only a middotWarning label The new amendshyed labels also allow 1 2 and 5 Skeeter ABATE to be used as a pre-hatch in breeding and floodplain areas And now all Skeeter

in the United States ABATE has always been a

great choice for effective conshytrol and now its even better

ABATE ABATE products are regisshytered to be applied using aerial equipment as well making this reliable prodshy

All 5 Skeeter ABATE labels have been amended down from a Danger classification

uct as versatile as it is effective

Call for a copy of the new label

The Finest Equipment Professionals count on the raw power of the 18 hp

GRIZZLY to get tough jobs done right the first time Fully loaded everything is standard on this workhorse

bull High Performance IHPLAT nozzle bull Electric start bull Fully remote operation

THE WORLD NEEDS

-bull Automatic engine idle-back MOSQUITO CONTROL-

(iCLARKE 1-800-323-5727

Clarke Mosquito Control Products Inc bull Clarke Engineering Technologies Inc

1(~~ PO Box 60005 Fort Myers FL 33906

ADDRESS CORRECTION REQUESTED

email clarkecmosquitocom web wwwcmosquitocom

1 bullbull )1 bullbullbull 1111 11 bullbullbullbull 11 1 bullbull 111 bullbullbull 111 bullbullbull 111 bullbullbull 11 bullbullbullbull 11 1 R1chard Da r s 1e Florida Medic a l Entomology Laborator y 200 9th St SE vera Beac h FL 32962-4657

BULK RATE US POSTAGE

PAID PERMIT 198 IT MYERS FL

Page 25: Wing Beats Volume 8 Number 3wingbeats.floridamosquito.org/Wingbeats/pdfs/Vol8No3.pdf · 2014. 4. 11. · Stan Cope, Norfolk, VA Betsy Field, Vero Beach, FL John Gamble, New Smyrna

Were Sales VW ampR s professional educated experienced staff knows and understands the vector control industry You can count on us to be there when you need us

Were Service VW ampR has over 70 locations across the United States and Mexico that offer convenient local vector control products Count on our professional and knowledgeable industry experts to assist you in finding solutions to your problems

Were Support bull VWampRs web site is designed to provide you with the latest

industry information Visit PestWeb for labels slides MSDSs industry news and weather reports

bull ChemCare provides you with chemical waste management solutions liSTW

bull Our licensed instructors are teaching t I~middot middotmiddot 1~ middot bull seminars in classrooms across the nation bull~middot-w~ You can count on us to he p you stay current

Were Serving the Vector Control Industry bull Btis granules liquid

sand wettable powder b1iquettes dunks

bull Larvicide oils bull UL V foggers bull Sprayers bull Fyfanon bull Natural Pyrethrin

WereVWampR

bull Resmethrin bullDibrom bull Hantavirus live traps bull Diluent oils bull Safety equipment bull Light traps bull Thermal foggers

Call Your Local VWampR Office At

1-800-888-4VWR Van Waters amp Roge~s Inc

We re More Than Just A Distributor

The Best Products including ABATE As American

Cyanamid exits the mosquito control market we are honored to be the exclusive formulashytor and distributor of ABATE products

to only a middotWarning label The new amendshyed labels also allow 1 2 and 5 Skeeter ABATE to be used as a pre-hatch in breeding and floodplain areas And now all Skeeter

in the United States ABATE has always been a

great choice for effective conshytrol and now its even better

ABATE ABATE products are regisshytered to be applied using aerial equipment as well making this reliable prodshy

All 5 Skeeter ABATE labels have been amended down from a Danger classification

uct as versatile as it is effective

Call for a copy of the new label

The Finest Equipment Professionals count on the raw power of the 18 hp

GRIZZLY to get tough jobs done right the first time Fully loaded everything is standard on this workhorse

bull High Performance IHPLAT nozzle bull Electric start bull Fully remote operation

THE WORLD NEEDS

-bull Automatic engine idle-back MOSQUITO CONTROL-

(iCLARKE 1-800-323-5727

Clarke Mosquito Control Products Inc bull Clarke Engineering Technologies Inc

1(~~ PO Box 60005 Fort Myers FL 33906

ADDRESS CORRECTION REQUESTED

email clarkecmosquitocom web wwwcmosquitocom

1 bullbull )1 bullbullbull 1111 11 bullbullbullbull 11 1 bullbull 111 bullbullbull 111 bullbullbull 111 bullbullbull 11 bullbullbullbull 11 1 R1chard Da r s 1e Florida Medic a l Entomology Laborator y 200 9th St SE vera Beac h FL 32962-4657

BULK RATE US POSTAGE

PAID PERMIT 198 IT MYERS FL

Page 26: Wing Beats Volume 8 Number 3wingbeats.floridamosquito.org/Wingbeats/pdfs/Vol8No3.pdf · 2014. 4. 11. · Stan Cope, Norfolk, VA Betsy Field, Vero Beach, FL John Gamble, New Smyrna

The Best Products including ABATE As American

Cyanamid exits the mosquito control market we are honored to be the exclusive formulashytor and distributor of ABATE products

to only a middotWarning label The new amendshyed labels also allow 1 2 and 5 Skeeter ABATE to be used as a pre-hatch in breeding and floodplain areas And now all Skeeter

in the United States ABATE has always been a

great choice for effective conshytrol and now its even better

ABATE ABATE products are regisshytered to be applied using aerial equipment as well making this reliable prodshy

All 5 Skeeter ABATE labels have been amended down from a Danger classification

uct as versatile as it is effective

Call for a copy of the new label

The Finest Equipment Professionals count on the raw power of the 18 hp

GRIZZLY to get tough jobs done right the first time Fully loaded everything is standard on this workhorse

bull High Performance IHPLAT nozzle bull Electric start bull Fully remote operation

THE WORLD NEEDS

-bull Automatic engine idle-back MOSQUITO CONTROL-

(iCLARKE 1-800-323-5727

Clarke Mosquito Control Products Inc bull Clarke Engineering Technologies Inc

1(~~ PO Box 60005 Fort Myers FL 33906

ADDRESS CORRECTION REQUESTED

email clarkecmosquitocom web wwwcmosquitocom

1 bullbull )1 bullbullbull 1111 11 bullbullbullbull 11 1 bullbull 111 bullbullbull 111 bullbullbull 111 bullbullbull 11 bullbullbullbull 11 1 R1chard Da r s 1e Florida Medic a l Entomology Laborator y 200 9th St SE vera Beac h FL 32962-4657

BULK RATE US POSTAGE

PAID PERMIT 198 IT MYERS FL