Aract and Kill Tac.cs for SWD · 2017. 2. 21. · Steps for Developing Aract and Kill Device for...
Transcript of Aract and Kill Tac.cs for SWD · 2017. 2. 21. · Steps for Developing Aract and Kill Device for...
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A"ractandKillTac.csforSWD
JuanHuang,Ma"hewGrieshop,HaritBal&LarryGut
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Insecticide or Physical Trapping System
Sex pheromones or other semiochemical
Attract-and-Kill
+
What is Attract and Kill?
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Attract & kill provides superior control
Attract & Kill, pests removed
Primary Attraction
Mating Disruption
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http://www.123rf.com/photo_28915732_tractor-sprays-insecticide-or-fungicide-in-apple-orchard.html
• Minimize insecticide residues on the fruits/vegetables
• Low AI, reduce the cost, reduce selection pressure • Selective, safe on non-targets • Minimize secondary pest resurgence
Examples A+K formulations: Sirene®, Appeal, LastCallTM.
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Performance Characteristics of Successful Insecticide Based Devices
• Device has to attract insects from a distance • Insects must land on and interact with
the device • If the lure is too hot the insect may run • If the device is too small the insect may not
touch it
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CurrentA"ractandKillTechnology:• Wax or polymer droplets with
both pheromone and toxicant
• Insects have a very small surface to contact
• Insects have to contact semiochemicals and insecticides at the same time
• Increases the risk overloading insect sensory systems and not touching the formulation
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Provided less or equivalent control compared to reservoir dispensers Many operate via disruption, not insecticide poisoning
Unfortunately, Many A&K formulations developed to date have:
Mea
n #
of O
FM m
ales
pe
r fem
ale-
baite
d tr
ap
Control 0
1 2
3 4
5 6
Pheromone only Pheromone+Toxin
a
b b
Evenden and McLaughlin, 2004
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MSU Prototype Pyrethroid Treated
“Pouch”
Current “Droplet”
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We’ve applied attract-and-kill pouch to other insect pests of tree fruit
?
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StepsforDevelopingA1ractandKillDeviceforSWD
1. Identify attractants 2. Force contact bioassay to determine
exposure time needed for mortality 3. Lab evaluation of the device
4. Field evaluation of trap shut down and damage reduction
Baits
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Force Contact Bioassays • How long do SWD need to
contact AK pouch to achieve 100% mortality?
• Nylon fabric treated with 0.2 ml/cm2 deltamethrin
• 10 male and 10 female SWD forced to contact fabric for 2, 5, or 10 seconds.
• Mortality and knockdown assessed 10, 30, and 60 min after exposure.
• The experiment was replicated 4 times.
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a
bab
NS NS
0
20
40
60
80
100
10 30 60Corrected
%SWDKn
ockeddo
wn
PostExposure(min)
2 5 10
NS
NS NS
0
20
40
60
80
100
10 30 60PostExposure(min)
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ForceContactSummary
• 2 seconds deltamethrin exposure leads to 100% mortality in less than 1 hour!! • 40% and 20% mortality at 10
minutes for males and females, respectively
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Baits:
Yeast-sugar bait
Apple cider vinegar bait
Scentry
Trécé
Alpha Scents
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Scentry lure
Trécé lure
11
12
Bait: Brewer yeast + sugar
25
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Winevs.YeastComparison
Addredfooddye
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Winevs.YeastComparison
a
b
a
b
0
20
40
60
80
yeast-yellow
wine-red yeast-red wine-red
MeanNum
bersofS
WD
Caught
BinaryTest
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MiniWindTunnelBioassay:§ AKpouch+wine(A+K)§ pouch+wine(A)§ pouch+water(control)
32 X 19 X 18 in
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0
10
20
30
40
50
0 10 20 30 40 50 60
%Sou
rceCo
ntact
TimeaJerRelease(min)
control A AK
Mini-WindTunnelBioassays
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Mini-WindTunnelBioassays
0
20
40
60
control A AK
%M
ortality
Treatment
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TaffyBait
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BinaryChoiceTests
0
20
40
60
0 20 40 60
No.Flieso
nthe
Pouch
Timea[erRelease(min)
Wine Taffy
0
20
40
60
0 20 40 60Timea[erRelease(min)
Taffy H2O
0
20
40
60
0 20 40 60
No.Flieso
nthe
Pouch
Timea[erRelease(min)
Wine H2O
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3-doldTaffyvs.3-doldWine
0
10
20
30
40
50
60
0 20 40 60
No.Flieso
nthePo
uch
TimeaJerRelease(min)
Taffy Wine
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16AKpouchesin4×4grid(41m2=0.01ac),hungona1mtallbamboos.cksinawoodlotcontainingwildberrybushes,nearbyanorganicblueberryfield.Monitoringtrap:yeast-sugartrapfor5wksfromJuly8toAug.3,2016
AKfieldstudydonebyDr.HaritBal
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0
20
40
60
80
100
120
140
SWDmale SWDfemale SWDtotal others
Num
bersofFliesC
aptured
controlAKpouch
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SmallAKfieldtrialusingScentryluresatClarksvilleResearchSta.onfrom
7/29-9/30
Pouch density: 0, 50, 150, 450/ac in 0.25 ac plots
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0
200
400
600
800
SWDmale SWDfemale SWDtotal others
TotalFliesC
aptured control
P-50P-150P-450
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0
40
80
120
160
8/4 8/11 8/18 8/25 9/1 9/8 9/15 9/22 9/29
SWDCaptured
CKP-50P-150P-450
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PossiblereasonswhyAKisnotsoeffecNve:
• Scentrylurecouldnotcompetewithbackgrounda"ractants—billionsfruits/leafvola.les
• Treatmentsweretooclosetogether:¼ac,withnobufferzone
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Next Step: Identify effective attractants • This is our main challenge… • Sex pheromones not important to this
species…. • Food and oviposition attractants are
available throughout the environment…. • Also tend to be very volatile and short
lived. • No-target flies won’t be issue for AK
pouch
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Many thanks to: Ø Mitch Efaw Ø Thomas Gut Ø Morgan Jernstadt Ø Caleb Hayhoe Ø Megan Heil Ø Jake Treder
Acknowledgements
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Thank you