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J O D I S C O TT, M SE D U C AT I O N A N D P U B L I C R E L AT I O N S
A N A S TA S I A M O S Q U I T O C O N T R O L D I S T R I C TS T. A U G U S T I N E , F L
The Buzz About
Mosquito Control
The Good, The Bad and The Funny Looking
Good: Male Mosquitoes Food SourceBad:Female MosquitoesCan Vector Pathogens:
WNVMalariaDengueEEEDog Heart Worm
Funny Looking:Larvae
Mosquitoes VS. Bees
• Size: • Very small
• Habitats:• Larvae found in water• Adults found foraging
around people and plants
• Activity time: • Night• Most 1-2 hours after sunset
or sun rise
• Areas of activity:• Around water and
people/animals
• Size: • 10 to 20 times bigger
• Habitats:• Larvae found in hive• Adults found foraging from
flowers
• Activity time: • Day
• Areas of activity:• Around plants and
vegetative flowers
Control Methods:
AdultsPhysical & Mechanical:
Screen doors & windows
Sticky Traps
Attractive Traps
Personal Protection:
Clothing & Repellents
Chemical Control:
Permethrin
Sumithrin for Ground
Dibrom for Air
Can The Pesticides Used For Mosquito Control Kill Honey Bees?
Yes If directly applied to honey bees And in the case of overdoses
M O S Q U I T O C O N T R O L L AW ( C H A P T E R 3 8 8 ) & D A C ’ S C O D E ( % E -
1 3 ) :
U LV A P P L I C AT I O N O F P E S T I C I D E F O R A D U LT M O S Q U I T O E S H A S
T O B E J U S T I F I E D B A S E D O N:
V I R A L C A S E S O F: H U M A N S O R A N I M A L S
P O S I T I V E V I R A L C A S E S O F S E N T I N E L A N I M A L S &
M O S Q U I T O E S
H I G H N U M B E R S D U R I N G L A N D I N G R AT E C O U N T S A N D
C O L L E C T I O N S O F M O S Q U I T O E S I N A R E A S ( > 2 5 M O S Q U I T O E S )
S P E C I A L C O N D I T I O N S : F L O O D, H U R R I C A N E S A N D V I R A L
O U T B R E A K S
AMCD’S Adult Mosquito Control Operation:
GROUND ULV SPRAYING OF: PERMETHRIN
NO SMELLEFFECTIVE
0.0017 OZ PER ACREAERIAL SPRAYING FOR HOT SPOTS & EMERGENCY
SPRAYING:DIBROM
0.5-0 .6 OZ PER ACREBASED ON WEATHER, DISEASE OUTBREAK & NEED FOR IT
*WE HAVE A NO FLY LIST AND DO NOT SPRAY CONSERVATION LANDS & FEDERAL/STATE PARKS
WITHOUT DISEASE
AMCD’S Adult Mosquito Control Operation:
ASSESSMENTS OF THE IMPACT OF AERIAL ULV
APPLICATIONS OF DIBROM ON HONEY BEES IN MANATEE
COUNTY(1999-2000)
Research: Dr. Harry Zhong, FAMU
Research Location & Hive Set-Up
• Location: Palmetto, Manatee County, Florida
• Two Treatment Sites: Terra Ceira Rd & Port Manatee
• One Control Site: Manatee Fruit at Cortez Rd
• 16 Bee Hives (in a cluster of 4) were set up at each site
• 8 Hives in open and 8 hives in forest area at Terra Ceira Rd
Sample Collection
• Dibrom Residue• Yarn Samples
• Naled Concentration In Air• Filter Paper Samples
• Naled Ground Deposition
• Bee Mortality• Dead Bee Trap• Screen 1/8 Inch Hardware Cloth
With Surface Area 0.19m2 & Height 25cm
• *Dead bees collected before and after aerial ULV application
Comparison of Pre- and Post-spray Honeybee Mortality Collected by Traps in front of Bee Hives following Operational Aerial ULV Sprays of Naled via High-presure Hydraulic Nozzle
System by Manatee County MCD (September 25, 2000)
0
20
40
60
80
100
120
140
160
1 - Forest 1 - Open 2 - Open 2 _ Open 3 - Control 1 - Forest 1 - Open 2 - Open 2 _ Open 3 - Control
Pre-spray Site Post-spray
Zhong -- AMCD 2008-209/11/2008
Honey Production (1999 & 2000)
• 1999 2000 %INCREASE
• Site 1• Open 52.5 ± 23.7 lbs 73.4 ± 45.8 lbs
40%• Forest 46.8 ± 35.0 lbs 98.3 ± 49.9 Ibs
110%• Site 2 • Open 71.2 ± 24.7 lbs 107.6 ± 28.7 lbs 51%
• Site 3 (Control Site)• Open 88.6 ± 38.4 lbs 114.8 ± 38.3 lbs 30%
Zhong -- AMCD 2008-2
09/11/2008
Dibrom Residue Impact on Honeybees
Zhong -- AMCD 2008-2
09/11/2008
• Bee Mortality was correlated with Naled residue
ground deposition
• Filter Paper Data
• When Nale residue was less than 1500 μg/m2 , bee
mortality was not significantly different between
treated and control groups
• Honey Production was not significantly different
between spray and control sites
Mosquito Control District
Bee Keepers
Reduce Naled residue deposits near hives Inform Bee Keepers
when spraying will occur
Continue implementing IMM practices
Reduce number of honeybees resting in front of hive during the night Orient the hive entrance
direction to downwind to reduce the exposure
Place hive in vegetated area- trees or tall grass- low bee mortality
Minimize Honey Bee Mortality
Florida Bee Kill Investigation Report
9 Separate bee keepers in 7 counties reported kills between
September & November 2011
Investigation by DACS/DPI
Initial report by bee keepers implicated mosquito control activities
Collected samples from affected bee keepers
Inspected pesticide use: mosquito & agricultural operations
Collected dead bees, combs & honey, swabbed samples from hive
exteriors and materials found in the hives being used for control of
bee pests
Florida Bee Kill Investigation Report
Fipronil in sugar syrup used to feed colonies
most likely explanation of the bee kills
experienced in Brevard County
As the colonies that were exposed to this
material declined, foragers from neighboring
hives robbed the fipronil-tainted syrup or the
honey made from the syrup and experienced
bee deaths as well
Florida Bee Kill Investigation Report
Fipronil in sugar water has been used to eradicate
feral bee colonies in New Zealand
Bee kills outside of the Brevard /Indian River
County area have not been linked to any intentional
poisoning or pesticide misuse.
Misuse of amitraz for varron mite control, and
fipronil containing traps for hive beetle control was
observed at a number of locations.
Bee Deaths in St. Johns CountyMay 2011
• Bee keeper f rom SR 16 compla ined that mosqui to
contro l spray by a i rp lane k i l led many o f h is bees
• DACS d id invest igat ion f rom Apr i l to May
• No mosqui to spray in St . Johns in Apr i l and May by
aer ia l
• Bee keeper saw Jacksonv i l le Mosqui to Contro l
a i rp lane fl y by h is area .
• Flight was a test run, no chemicals dispensed
• The case was d ismissed in la te May
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