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Thrips Management in Blueberries Oscar E. Liburd Entomology and Nematology Department University of Florida. Background. Flower thrips, Frankliniella spp. Adults 1/16 of an inch Yellow-orange coloration Wide host range, rapid colonizers Multiple generations per year - PowerPoint PPT Presentation
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Thrips Management in Blueberries
Oscar E. Liburd
Entomology and Nematology Department University of Florida
Flower thrips, Frankliniella spp. Adults 1/16 of an inch Yellow-orange coloration Wide host range, rapid colonizers Multiple generations per year Travel along wind currentsBackground
Background - Thrips Lifecycle
MaleFemalePupanon-feedingLarvalfeeding
Flower-thrips species Florida flower thrips WesternEasternOther97%1%1%1%
Goals (2005) Track the movement of flower thrips into blueberry fields
To correlate thrips population with blueberry flower development
3) To evaluate reduced-risk and conventional insecticides for control of thrips in blueberries
Tracking the movement of flower thripsinto blueberry fields
2 Farms were selected Each farm had 49 sampling stations (white sticky traps)Traps were collected every other day for 25 daysCorrelated the number of thrips caught on traps with flower development
Day 3Max 5 thrips/trap0 - 5%40 - 50%Day 7Max 25 thrips/trapRelationship between flower developmentand movement of thrips
Movement of thrips into blueberry fieldsDay 21 Day 13Day 1670 - 80%80 90%Fruit formation100 thrips/trap190 thrips/trap35 thrips/trap
ResultsR = 0.9908; F = 107.8; df = 3,9; P < 0.0001 Size of thrips populations in relation to flower phenology107020901Percentages of opened flowers
QuestionsQ. When do I spray for thrips? Ans. It depends on several factors including history of farmIf you have a history of high thrips population you should begin to spray when 5% of the flowers have openedIf your farm usually experience low thrips population, you can wait until 50% of the flowers have opened to begin your spraying program Q. What should I spray?
Pesticide efficacy results20042005
calibration
vol (ml)ml/s(ft/s)ml/ftml/sqftml/900sqftgal/plot4plotsdistance feetdistance (m)time (s)speed (f/s)
2309.8374679213257.6211.52.1739130435
2359.9449851883257.6213.421.8628912072
23510.0599315068257.6213.161.8996960486
24510.4299702001257.6214.231.7568517217
110.0680887041110.06808870412.01361774081812.2559667450.47118655141.8847462054257.6213.671.8288222385
17013.7651821862257.6215.761.5862944162
13512.8205128205
3258.6206896552
31510.4166666667average
211.4057628321111.40576283212.28115256642053.03730978640.53378970052.1351588022
2754.94604316551.851411446
2354.9767047861
2604.9130763416
2555.0475059382
34.970832557914.97083255790.9941665116894.74986041590.23263496370.9305398548
2909.6989966555
2508.1967213115
2658.6460032626
2658.6460032626
2207.0512820513
48.447801308718.44780130871.68956026171520.60423556820.39535710121.581428405
90015*3*20
dosis/acredosis/plot (900sqft)4 plots
Malathion Yellow1pint0.020669.77583cc39.10332
Esteem White1pint0.020669.77583cc39.10332
Control Orange0
SpinTor Red6oz0.123963.66593cc14.66372
GF 968 Blue+Pink21.3g (AI)0.440058440.058mg1760.232
Assail Pink2.3oz0.0475181.34711g5.38844
Calypso Blue4oz0.082642.44396cc9.77584
Noval Green1.67lb0.034502215.64993g62.59972
sprayer4plots (gal)3 gal
1Malathion Yellow1.884746205439.10332cc62.2417807039
2Esteem White2.135158802239.10332cc54.9420304852
2SpinTor Red2.135158802214.66372cc20.6032263058
3GF 968 Blue+Pink0.93053985481760.232mg5674.8735398874
3Assail Pink0.93053985485.62112cc18.1221254656
4Calypso Blue1.5814284059.77584cc18.5449558813
4Noval Green1.58142840562.59972g118.7528688667
map
Malathion YellowAssail Pink
Esteem WhiteNoval Green
Control OrangeMalathion Yellow
SpinTor RedControl Orange
GF 968 Blue+PinkCalypso Blue
Assail PinkEsteem White
Calypso BlueGF 968 Blue+Pink
Noval GreenSpinTor Red
Esteem WhiteGF 968 Blue+Pink
SpinTor RedControl Orange
GF 968 Blue+PinkEsteem White
Noval GreenNoval Green
Control OrangeCalypso Blue
Assail PinkSpinTor Red
Malathion YellowAssail Pink
Calypso BlueMalathion Yellow
Road
* spiontor --> control corrected in blk 3 (feb 20-2004)
North
flower
0.55252530.07933630.0793363
1.0592490.28885370.2888537
1.10138890.08723830.0872383
1.27063490.14516870.1451687
1.38383840.13145870.1314587
1.41208960.51878970.5187897
1.56049710.31594160.3159416
Average increase in thrips population
flowers
WeekBlocktrtpesticidebudsWeekBlocktrtpesticidebudsWeekBlocktrtpesticidebudsWeekBlocktrtpesticidebuds1/buds
01Assailbefore211Assailafter111Assailafter0.531Assailafter0.59090909091.6923076923
01Calypsobefore111Calypsoafter111Calypsoafter131Calypsoafter0.968751.0322580645
01Controlbefore211Controlafter011Controlafter031Controlafter1.54545454550.6470588235
01Esteembefore111Esteemafter111Esteemafter131Esteemafter11
01GF_968before411GF_968after611GF_968after1.531GF_968after1.60.625
01Malathionbefore211Malathionafter611Malathionafter331Malathionafter2.480.4032258065
01Novalbefore911Novalafter011Novalafter031Novalafter11
01SpinTorbefore311SpinTorafter811SpinTorafter2.666666666731SpinTorafter0.57142857141.75
02Assailbefore412Assailafter812Assailafter232Assailafter3.93333333330.2542372881
02Calypsobefore712Calypsoafter412Calypsoafter0.571428571432Calypsoafter2.96428571430.3373493976
02Controlbefore412Controlafter112Controlafter0.2532Controlafter1.03225806450.96875
02Esteembefore112Esteemafter412Esteemafter432Esteemafter1.59090909090.6285714286
02GF_968before412GF_968after312GF_968after0.7532GF_968after1.20.8333333333
02Malathionbefore212Malathionafter512Malathionafter2.532Malathionafter1.11111111110.9
02Novalbefore612Novalafter312Novalafter0.532Novalafter1.09259259260.9152542373
02SpinTorbefore012SpinTorafter212SpinTorafter132SpinTorafter1.14814814810.8709677419
03Assailbefore213Assailafter013Assailafter033Assailafter0.66666666671.5
03Calypsobefore213Calypsoafter313Calypsoafter1.533Calypsoafter0.79032258061.2653061224
03Controlbefore213Controlafter813Controlafter433Controlafter1.20.8333333333
03Esteembefore113Esteemafter313Esteemafter333Esteemafter1.44444444440.6923076923
03GF_968before013GF_968after613GF_968after133GF_968after0.91111111111.0975609756
03Malathionbefore313Malathionafter113Malathionafter0.333333333333Malathionafter1.46666666670.6818181818
03Novalbefore313Novalafter513Novalafter1.666666666733Novalafter0.9629629631.0384615385
03SpinTorbefore213SpinTorafter513SpinTorafter2.533SpinTorafter1.840.5434782609
04Assailbefore014Assailafter814Assailafter134Assailafter0.42.5
04Calypsobefore114Calypsoafter214Calypsoafter234Calypsoafter0.9251.0810810811
04Controlbefore214Controlafter514Controlafter2.534Controlafter2.2758620690.4393939394
04Esteembefore314Esteemafter814Esteemafter2.666666666734Esteemafter1.50.6666666667
04GF_968before214GF_968after814GF_968after434GF_968after1.37142857140.7291666667
04Malathionbefore214Malathionafter414Malathionafter234Malathionafter1.18421052630.8444444444
04Novalbefore214Novalafter314Novalafter1.534Novalafter1.350.7407407407
04SpinTorbefore014SpinTorafter414SpinTorafter134SpinTorafter0.67741935481.4761904762
21Assailbefore2231Assailafter1331Assailafter0.5909090909
21Calypsobefore3231Calypsoafter3131Calypsoafter0.96875
21Controlbefore3331Controlafter5131Controlafter1.5454545455
21Esteembefore6231Esteemafter6231Esteemafter1
21GF_968before3031GF_968after4831GF_968after1.6meanvarianceerr
21Malathionbefore2531Malathionafter6231Malathionafter2.48Assail0.55252530.01888280.0793363
21Novalbefore3731Novalafter3731Novalafter1SpinTor1.0592490.33374590.2888537
21SpinTorbefore5631SpinTorafter3231SpinTorafter0.5714285714Novaluron1.10138890.03044210.0872383
22Assailbefore1532Assailafter5932Assailafter3.9333333333GF9681.27063490.08429580.1451687
22Calypsobefore2832Calypsoafter8332Calypsoafter2.9642857143Knack1.38383840.06912560.1314587
22Controlbefore6232Controlafter6432Controlafter1.0322580645Calypso1.41208961.07657110.5187897
22Esteembefore4432Esteemafter7032Esteemafter1.5909090909Malathion1.56049710.39927640.3159416
22GF_968before5032GF_968after6032GF_968after1.2
22Malathionbefore5432Malathionafter6032Malathionafter1.1111111111
22Novalbefore5432Novalafter5932Novalafter1.0925925926
22SpinTorbefore5432SpinTorafter6232SpinTorafter1.1481481481
23Assailbefore3033Assailafter2033Assailafter0.6666666667
23Calypsobefore6233Calypsoafter4933Calypsoafter0.7903225806
23Controlbefore5033Controlafter6033Controlafter1.2
23Esteembefore4533Esteemafter6533Esteemafter1.4444444444
23GF_968before4533GF_968after4133GF_968after0.9111111111
23Malathionbefore3033Malathionafter4433Malathionafter1.4666666667
23Novalbefore5433Novalafter5233Novalafter0.962962963
23SpinTorbefore5033SpinTorafter9233SpinTorafter1.84
24Assailbefore4534Assailafter1834Assailafter0.4
24Calypsobefore4034Calypsoafter3734Calypsoafter0.925
24Controlbefore2934Controlafter6634Controlafter2.275862069
24Esteembefore4634Esteemafter6934Esteemafter1.5
24GF_968before3534GF_968after4834GF_968after1.3714285714
24Malathionbefore3834Malathionafter4534Malathionafter1.1842105263
24Novalbefore4034Novalafter5434Novalafter1.35
24SpinTorbefore6234SpinTorafter4234SpinTorafter0.6774193548
Data
WeekBlocktrttrapspesticidebudsWeek 1= feb 5-2004
01Assail5before
01Calypso4before
01Control6before
01Esteem5before
01GF_9689before
01Malathion1before
01Noval7before
01SpinTor1before
02Assail2before
02Calypso2before
02Control6before
02Esteem3before
02GF_9682before
02Malathion0before
02Noval9before
02SpinTor1before
03Assail6before
03Calypso4before
03Control1before
03Esteem13before
03GF_9682before
03Malathion2before
03Noval1before
03SpinTor10before
04Assail5before
04Calypso8before
04Control1before
04Esteem8before
04GF_9682before
04Malathion4before
04Noval3before
04SpinTor4before
11Assail54after
11Calypso26after
11Control17after
11Esteem82after
11GF_96874after
11Malathion34after
11Noval23after
11SpinTor20after
12Assail40after
12Calypso37after
12Control48after
12Esteem32after
12GF_96868after
12Malathion38after
12Noval64after
12SpinTor21after
13Assail15after
13Calypso32after
13Control36after
13Esteem71after
13GF_96822after
13Malathion35after
13Noval12after
13SpinTor35after
14Assail17after
14Calypso65after
14Control26after
14Esteem96after
14GF_96852after
14Malathion70after
14Noval66after
14SpinTor59after
21Assail115before1
21Calypso39before
21Control104before0
21Esteem214before1
21GF_968191before
21Malathion74before6
21Noval149before0
21SpinTor40before
22Assail167before
22Calypso115before4
22Control210before
22Esteem7before4
22GF_968236before
22Malathion95before
22Noval323before
22SpinTor72before2
23Assail81before
23Calypso251before3
23Control211before8
23Esteem362before3
23GF_96895before6
23Malathion113before1
23Noval45before5
23SpinTor280before5
24Assail77before
24Calypso266before2
24Control129before5
24Esteem286before8
24GF_96895before
24Malathion193before4
24Noval437before3
24SpinTor30beforeon the ground
31Assail41after
31Calypso63after
31Control55after
31Esteem215after
31GF_96881after
31Malathion49after
31Noval103after
31SpinTor54after
32Assail77after
32Calypso55after
32Control267after
32Esteem201after
32GF_968191after
32Malathion46after
32Noval175after
32SpinTor104after
33Assail23after
33Calypso174after
33Control136after
33Esteem292after
33GF_96858after
33Malathion50after
33Noval66after
33SpinTor142after
34Assail43after
34Calypso256after
34Control189after
34Esteem248after
34GF_968193after
34Malathion153after
34Noval222after
34SpinTor194after
Sheet1
dateaft-beftrtblkthips-traps3-Marafteractara1170.9444444444
10-Febbeforeactara11524-Febbeforeactara118
10-Febbeforeactara2363-Marafteractara21673.4081632653
10-Febbeforeactara31924-Febbeforeactara249
10-Febbeforeactara4203-Marafteractara3291.5263157895
10-Febbeforeassail11224-Febbeforeactara319
10-Febbeforeassail2123-Marafteractara4641.2549019608
10-Febbeforeassail31924-Febbeforeactara451
10-Febbeforeassail4393-Marafterassail1291.2608695652
10-Febbeforecontrol12224-Febbeforeassail123
10-Febbeforecontrol2133-Marafterassail2510.8947368421
10-Febbeforecontrol31724-Febbeforeassail257
10-Febbeforecontrol4403-Marafterassail3371.6818181818
10-Febbeforemalath11324-Febbeforeassail322
10-Febbeforemalath2143-Marafterassail4841.5
10-Febbeforemalath32524-Febbeforeassail456
10-Febbeforemalath4223-Maraftercontrol1281.4
10-Febbeforenoval11524-Febbeforecontrol120
10-Febbeforenoval2143-Maraftercontrol21445.5384615385
10-Febbeforenoval33624-Febbeforecontrol226
10-Febbeforenoval4273-Maraftercontrol3381.5833333333
10-Febbeforespintor1724-Febbeforecontrol324
10-Febbeforespintor2203-Maraftercontrol41111.734375
10-Febbeforespintor31724-Febbeforecontrol464
10-Febbeforespintor4213-Maraftermalath1664.125
10-FebbeforeTD11624-Febbeforemalath116
10-FebbeforeTD2163-Maraftermalath21493.725
10-FebbeforeTD31824-Febbeforemalath240
10-FebbeforeTD4173-Maraftermalath3652.3214285714
24-Febafteractara11824-Febbeforemalath328
24-Febafteractara2493-Maraftermalath4902.5714285714
24-Febafteractara31924-Febbeforemalath435
24-Febafteractara4513-Marafternoval1190.6551724138
24-Febafterassail12324-Febbeforenoval129
24-Febafterassail257++3-Marafternoval21223.4857142857
24-Febafterassail32224-Febbeforenoval235
24-Febafterassail4563-Marafternoval3341.5454545455
24-Febaftercontrol124-Febbeforenoval322
24-Febaftercontrol2263-Marafternoval4573
24-Febaftercontrol32424-Febbeforenoval419
24-Febaftercontrol4643-Marafterspintor1532.12
24-Febaftermalath11624-Febbeforespintor125
24-Febaftermalath2403-Marafterspintor21254.8076923077
24-Febaftermalath32824-Febbeforespintor226
24-Febaftermalath4353-Marafterspintor3120.5
24-Febafternoval12924-Febbeforespintor324
24-Febafternoval2353-Marafterspintor4753.125
24-Febafternoval32224-Febbeforespintor424
24-Febafternoval419++3-MarafterTD1572.7142857143
24-Febafterspintor12524-FebbeforeTD121
24-Febafterspintor2263-MarafterTD2891.328358209
24-Febafterspintor32424-FebbeforeTD267
24-Febafterspintor4243-MarafterTD3292.0714285714
24-FebafterTD12124-FebbeforeTD314
24-FebafterTD2673-MarafterTD4611.3555555556
24-FebafterTD31424-FebbeforeTD445
24-FebafterTD445
3-Marbeforeactara117
3-Marbeforeactara2167
3-Marbeforeactara329
3-Marbeforeactara464
3-Marbeforeassail129
3-Marbeforeassail251
3-Marbeforeassail337
3-Marbeforeassail484
3-Marbeforecontrol128
3-Marbeforecontrol2144
3-Marbeforecontrol338
3-Marbeforecontrol4111
3-Marbeforemalath166
3-Marbeforemalath2149
3-Marbeforemalath365
3-Marbeforemalath490
3-Marbeforenoval119
3-Marbeforenoval2122
3-Marbeforenoval334
3-Marbeforenoval457
3-Marbeforespintor153
3-Marbeforespintor2125
3-Marbeforespintor312
3-Marbeforespintor475
3-MarbeforeTD157
3-MarbeforeTD289
3-MarbeforeTD329
3-MarbeforeTD461
Chart1
1.2
1.3611111111
1
2.55
1.9166666667
4.75
1.1578947368
1.4358974359
2
2
1.4117647059
1.6
1.2307692308
2.8571428571
1.12
1.5909090909
1.9333333333
2.5
0.6111111111
0.7037037037
3.5714285714
1.3
1.4117647059
1.1428571429
1.3125
4.1875
0.7777777778
2.6470588235
Sheet2
actara11.20.9819330446trtblkaverage
actara21.36111111110.9696402661actara11.0722222222
actara311actara22.3846371882
actara42.550.9106384465actara31.2631578947
assail11.91666666670.9370124061actara41.9024509804
assail24.750.855717944assail11.5887681159
assail31.15789473680.9854465922assail22.8223684211
assail41.43589743590.964467634assail31.4198564593
control120.9330329915assail41.4679487179
control220.9330329915control11.7
control31.41176470590.9661037502control23.7692307692
control41.60.9540870513control31.4975490196
malath11.23076923080.9794501497control41.6671875
malath22.85714285710.9003405373malath12.6778846154
malath31.120.9887311065malath23.2910714286
malath41.59090909090.9546308471malath31.7207142857
noval11.93333333330.936201486malath42.0811688312
noval22.50.9124435366noval11.2942528736
noval30.61111111111.0504804685noval22.9928571429
noval40.70370370371.0357644868noval31.0782828283
spintor13.57142857140.8804725143noval41.8518518519
spintor21.30.9741047583spintor12.8457142857
spintor31.41176470590.9661037502spintor23.0538461538
spintor41.14285714290.9867356184spintor30.9558823529
TD11.31250.9731730394spintor42.1339285714
TD24.18750.8665717319TD12.0133928571
TD30.77777777781.0254498997TD22.7579291045
TD42.64705882350.9072430308TD31.4246031746
actara10.94444444441.005732208TD42.0013071895
actara23.40816326530.8846020895
actara31.52631578950.9585958849
actara41.25490196080.9775500904
assail11.26086956520.9770864346
assail20.89473684211.0111846492
assail31.68181818180.9493406899
assail41.50.9602645008
control11.40.9669125483
control25.53846153850.8426768935
control31.58333333330.9550866277
control41.7343750.9464239012
malath14.1250.8678758522
malath23.7250.8767734137
malath32.32142857140.9192305882
malath42.57142857140.9098767203
noval10.65517241381.0431924607
noval23.48571428570.8826140192
noval31.54545454550.9574021014
noval430.8959584598
spintor12.120.9276121189
spintor24.80769230770.8546854949
spintor30.51.0717734625
spintor43.1250.8923084338
TD12.71428571430.9049705448
TD21.3283582090.9720049567
TD32.07142857140.9297645936
TD41.35555555560.9700369286
final
1.620.30.3
1.80.420.42
1.820.330.33
2.040.270.27
2.240.470.47
2.4420.270.27
Actara 25 WG Diamond .83EC Assail 70W TD 2480 SpinTor 2SC Malathion 5EC
Average population increase rate
Sheet3
Actara 25 WG1.620.3
Diamond .83EC1.80.42
Assail 70W1.820.33
TD 24802.040.27
SpinTor 2SC2.240.47
Malathion 5EC2.4420.27
Effect of SpinTor on thrips population over 48 hours
Chart1
25231721.5
53128
9141714
Rep 1
Rep2
Rep3
Rep4
Hours after Application
No. of Thrips
Chart2
27.62
7
13.5
Aver. no. of Thrips
Hours after Application
Mean # of Thrips
Sheet2
Untreated24Hours48Hours72 HoursUntreated24 Hours48 Hours72 ours
Rep 1255973Aver. no. of Thrips27.62713.530.5
Rep22331474
Rep317121720
Rep421.581415
Average21.62713.545.5
Sheet3
QuestionWhat is the relationship between thrips numbers and injury?
Thrips Injury Flower protection Hand pollination Thrips release Flower protection Fruit formation counting
Thrips Injury fruits0 thrips /flower
Thrips Injury fruitsOviposition Injury(5 to 10 thrips / flower)
Thrips Injury Fruit dehydration 20 thrips /flower
Thrips Injury Average S.E.M.
regresion #
1
4
3
3
4
1
4
4
3
4
3
2
3
4
3
3
3
3
4
3
regresion %
70.29655.15662
65.509658.329662
62.90454.48460
58.92250.40254
No. of thrips per flower
% of fruit formed
Chart3
627.577.57
623.593.59
604.214.21
544.264.26
data
thripsthreefruitsper**1.7ono
01120162.8362126148219.7121086612fracasinastw
024801718.90936564382664.1702636860.20.20135792080.463647609104857600000000000000000000
033601054.04008087881587.34837119910.80.9272952181.1071487178115292150460684700000000000000000000000
043601054.04008087881587.34837119910.60.64350110880.8860771238365615844006297640000000000000000000
054801718.90936564382664.1702636860.60.64350110880.8860771238365615844006297640000000000000000000
01120162.8362126148219.71210866120.80.9272952181.1071487178115292150460684700000000000000000000000
024801718.90936564382664.1702636860.20.20135792080.463647609104857600000000000000000000
034801718.90936564382664.1702636860.80.9272952181.1071487178115292150460684700000000000000000000000
043601054.04008087881587.34837119910.80.9272952181.1071487178115292150460684700000000000000000000000
054801718.90936564382664.1702636860.60.64350110880.8860771238365615844006297640000000000000000000
213601054.04008087881587.34837119910.80.9272952181.1071487178115292150460684700000000000000000000000
22240529.0564156397765.0819998320.60.64350110880.8860771238365615844006297640000000000000000000
233601054.04008087881587.34837119910.40.41151684610.684719203109951162777600000000000000000000
244801718.90936564382664.1702636860.60.64350110880.8860771238365615844006297640000000000000000000
253601054.04008087881587.34837119910.80.9272952181.1071487178115292150460684700000000000000000000000
213601054.04008087881587.34837119910.60.64350110880.8860771238365615844006297640000000000000000000
223601054.04008087881587.34837119910.60.64350110880.8860771238365615844006297640000000000000000000
233601054.04008087881587.34837119910.60.64350110880.8860771238365615844006297640000000000000000000
244801718.90936564382664.1702636860.60.64350110880.8860771238365615844006297640000000000000000000
253601054.04008087881587.34837119910.80.9272952181.1071487178115292150460684700000000000000000000000
101240529.0564156397765.0819998320.60.64350110880.8860771238365615844006297640000000000000000000
1023601054.04008087881587.34837119910.40.41151684610.684719203109951162777600000000000000000000
1034801718.90936564382664.1702636860.60.64350110880.8860771238365615844006297640000000000000000000
1043601054.04008087881587.34837119910.80.9272952181.1071487178115292150460684700000000000000000000000
1053601054.04008087881587.34837119910.60.64350110880.8860771238365615844006297640000000000000000000
101240529.0564156397765.0819998320.60.64350110880.8860771238365615844006297640000000000000000000
1023601054.04008087881587.34837119910.40.41151684610.684719203109951162777600000000000000000000
1034801718.90936564382664.1702636860.60.64350110880.8860771238365615844006297640000000000000000000
1043601054.04008087881587.34837119910.80.9272952181.1071487178115292150460684700000000000000000000000
1053601054.04008087881587.34837119910.60.64350110880.8860771238365615844006297640000000000000000000
201240529.0564156397765.0819998320.60.64350110880.8860771238365615844006297640000000000000000000
202240529.0564156397765.0819998320.40.41151684610.684719203109951162777600000000000000000000
203240529.0564156397765.0819998320.40.41151684610.684719203109951162777600000000000000000000
2043601054.04008087881587.34837119910.40.41151684610.684719203109951162777600000000000000000000
2053601054.04008087881587.34837119910.60.64350110880.8860771238365615844006297640000000000000000000
201240529.0564156397765.0819998320.60.64350110880.8860771238365615844006297640000000000000000000
2023601054.04008087881587.34837119910.40.41151684610.684719203109951162777600000000000000000000
2033601054.04008087881587.34837119910.60.64350110880.8860771238365615844006297640000000000000000000
2043601054.04008087881587.34837119910.60.64350110880.8860771238365615844006297640000000000000000000
2054801718.90936564382664.1702636860.60.64350110880.8860771238365615844006297640000000000000000000
0.80.9272952181.1071487178115292150460684700000000000000000000000
avesem.+sem.-sem
0627.5762.72670.29655.156
2623.5961.919665.509658.3296
10604.2158.69462.90454.484
20544.2654.66258.92250.402
-0.4032258065m
thrips/hathrips/plantthrips/flower
c40$/haELI2204444.444444442204.44444444440.2204444444
v6000$/ton
d0.000000003ton/ha
k054269942
-0.403
thrips/hathrips/plantthrips/flower
c617.43$/haELI54300349.71630954300.3497163095.4300349716
v6000$/ton
d0.000000003ton/ha
k0.373(1-60%)54269942
IFAS Entomology & Nematology:3 $/lb
like the idea but your estimated number of flowers per plant is muchtoo low. To make an estimate, I would work backward from the expectedberry yield on a mature rabbiteye blueberry planting in Georgia orFlorida. My yield estimate may seem high but a lot of fruit is lostduring mechanical harvest and during fruit sorting that happens in thepacking house.
Assume average berry weight of rabbiteye is 1.2 grams.
Assume yield per acre at 15,000 pounds, with a planting rate of 1,000plants per acre. 37065.
This would be 15 pounds per plant or 6,800 grams.
Berries per bush would be 6,800 / 1.2 = 5,675.
Assuming a 60% fruit set, which is high for rabbiteye, there would be9,458 flowers per bush.
So I would estimate about 10,000 flowers per bush.
d= (%/100)* (Lb/plant)/(lb/Ton)/10000flowers/bush
IFAS Entomology & Nematology:3 $/lb
Sheet2
Sheet3
Thrips Injury oviposition 2 blueberry species in FL
250 flower per species
27C and 80% RH
15 days
Style Fruits Petals Ovaries
Thrips Injury ovipositionabccF = 19.16; df = 3,46; P < 0.001
Sheet1
PlaceTissuereplarvassqeggstype
Haines_CityPetals1265.0990195136highbush
Haines_CityPetals2386.164414003highbush
Haines_CityPetals311highbush
Haines_CityPetals4244.8989794856highbush
Haines_CityOvary1174.1231056256highbush
Haines_CityOvary2164highbush
Haines_CityOvary352.2360679775highbush
Haines_CityOvary421.4142135624highbush
Haines_CityStile111highbush
Haines_CityStile211highbush
Haines_CityStile300highbush
Haines_CityStile400highbush
Haines_CityFruit100highbush
Haines_CityFruit200highbush
Haines_CityFruit300highbush
Haines_CityFruit400highbush
Haines_CityFruit500highbush
GainesvillePetals121.4142135624highbush
GainesvillePetals200highbush
GainesvillePetals311highbush
GainesvillePetals411highbush
GainesvilleOvary100highbush
GainesvilleOvary221.4142135624highbush
GainesvilleOvary300highbush
GainesvilleOvary400highbush
GainesvilleStile100highbush
GainesvilleStile200highbush
GainesvilleStile300highbush
GainesvilleStile400highbush
GainesvilleFruit100highbush
GainesvilleFruit200highbush
GainesvilleFruit300highbush
GainesvilleFruit400highbush
GainesvilleFruit500highbush
GainesvillePetals193rabiteye
GainesvillePetals262.4494897428rabiteye
GainesvillePetals3133.6055512755rabiteye
GainesvillePetals4143.7416573868rabiteye
GainesvilleOvary111rabiteye
GainesvilleOvary211rabiteye
GainesvilleOvary311rabiteye
GainesvilleOvary482.8284271247rabiteye
GainesvilleStile100rabiteye
GainesvilleStile200rabiteye
GainesvilleStile300rabiteye
GainesvilleStile400rabiteye
GainesvilleFruit100rabiteye
GainesvilleFruit200rabiteye
GainesvilleFruit300rabiteye
GainesvilleFruit400rabiteye
GainesvilleFruit500rabiteye
Chart1
11.253.553.55
4.411.761.76
0.160.110.11
000
Flower tissues
Average No. of thrips emerging / 10 flowers
Sheet2
Petals11.253.55
Ovary4.411.76
Style0.160.11
Fruit00
Sheet3
Conclusions Flower-thrips reduce the quality and quantity of the blueberries7 days after bloom the initiation of hot-spots are definedThrips are present in blueberry fields for about 25 days from flower opening to petal fall In cases where there are high populations of thrips, insecticides could be more effective if applied when the hot-spots are defined (5-10 days after bloom) Assail, Diamond and Actara have shown to be significantly more effective than Malathion in controlling thrips population in blueberry fields
AcknowledgementsFlorida Blueberry Growers Association (FBGA)Michigan Blueberry Growers Association (MBG)Florida and Georgia blueberry growers Southern Region EPA grant #: X8-96424405-0Small Fruit and Vegetable Lab at UF