Effects of novel insecticides on spotted wing drosophila ... · –Mary Rogers, Bill Hutchison,...
Transcript of Effects of novel insecticides on spotted wing drosophila ... · –Mary Rogers, Bill Hutchison,...
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Effects of novel insecticides on spotted wing drosophila (Drosophila suzukii)
Matthew Gullickson, Mary Rogers, Department of Horticultural Science;Eric Burkness, William Hutchison, Department of Entomology October 17, 2018
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Outline
• Background– Spotted wing drosophila– Chemical management
• Research• Conclusion
Photo Credit: Michigan State University Extension
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Spotted wing drosophila (Drosophila suzukii; SWD)
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Hosts
Cultivated WildAucubaAkamonoAshBarberryBayberryBlackberryBlackthornBlueberryBryonyBuckthornCherryCotoneasterRibesDewberryDogwoodElderberryFigFirethornHawthornHerb-parisHoneysuckleHuckleberryIvy fruitJuneberryLaurelMistletoeMulberryNightshadePokeweedRaspberryRoseOleasterSalmonberrySalalServiceberrySnowberrySolomon’s sealSpicebushStrawberrySweet boxTorreyaViburnumVirginia creeperWineberryWintergreenYew
ApricotBlackberryBlueberryCherryCranberryCurrantElderberryFigGooseberryKiwiLingonberryMulberryPeachPlumRaspberryServiceberryStrawberry
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Morphology Morphology
D. melanogaster
D. suzukii
Male
FemaleBrown bodies
Female
Spotted wing
Serrated ovipositor
Smoothovipositor
Large, red eyes
Matusmura, 1931; Liburd & Iglesias, 2013; Atallah et al. 2014Photo Credits: Shutterstock, Michigan State University
Extension
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Photo Credit: Martin Hauser
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Oviposition
Photo Credit: Joel Atallah, UC Davis
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Life cycle
Egg(350+ per adult!)
Larvae
PupaeAdult
Kanzawa, 1939
Egg to adult
10.8 days
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SWD Summary
• Recently established• Modified ovipositor• Wide host range• Rapid generation time
Photo Credit: Michigan State University Extension
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Chemical Control
• Maximum residue limits• Re-entry intervals• Cost – especially for organic sprays• Detrimental to beneficial insects• Insecticide resistance• Concerns about the environment and human health
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Bioinsecticides
• Naturally occurring substances
US EPA, 2016; Martos et al., 2017; Sampson et al., 2016Photo credits: Australian Museum
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Feeding Stimulants
• Entice the pest to ingest more of the chemical
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Questions
• Which products work against SWD?• Are there ways to increase efficacy?
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Laboratory bioassays
• Objective– Determine the lethal and sub-lethal effects of novel
insecticides• Methods
– Maintain a D. suzukii colony– Apply insecticides to raspberry fruit– Introduce flies to treated raspberry fruit– Record mortality, eggs, larvae, pupae, and adults
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D. suzukii colony
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Products testedTrade name Chemical name ClassLI700® Soyal phospholipids + propionic acid AdjuvantSpearTM GS-omega/kappa-Hxtx-Hv1a ConventionalRimon® Novaluron ConventionalMustang MaxxTM 0.8 EC Zeta-cypermethrin ConventionalErythritol Erythritol Feeding stimulantAzera® Azadirachtin and pyrethrin OrganicGrandevo® Chromobacterium subtsugae OrganicPyganic® Pyrethrin OrganicEntrust® SC Spinosad OrganicOroboost® Alcohol ethoxylate SurfactantSilwet®L-77 Trisiloxane ethoxylate SurfactantJet-Ag® Hydrogen peroxide + peroxyacetic acid Sterilant
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Materials & Methods
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Mortality
• Entrust® SC + Erythtitol• Mustang MaxxTM
• Entrust ® SC• SpearTM + Erythritol• SpearTM + Silwet 77 ®
• SpearTM + LI700 ®
• Grandevo ® + Erythritol
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Oviposition
• Mustang MaxxTM
• SpearTM + Silwet 77®
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Incubation: 1 week
Control without flies Control with flies
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Larvae
• Mustang MaxxTM
• Entrust ® SC + Erythritol• Entrust ® SC• SpearTM + Silwet 77 ®
• Grandevo ® + Erythritol• SpearTM 10 ppt
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Pupae
• Mustang MaxxTM
• Entrust ® SC + Erythritol• Entrust ® SC• Grandevo® + Erythritol• Azera® + Erythritol
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Incubation: 2 weeks
Control without flies Control with flies
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Adults
• Mustang MaxxTM
• Entrust ® SC + Erythritol• Entrust ® SC• Pyganic ®
• Azera ® + Erythritol
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Feeding Stimulants
• Improved efficacy– Grandevo ®
– SpearTM
– Jet Ag ®
– Entrust ® SC
• Decreased efficacy– Rimon ®
– Azera ®
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Bioassay Summary
• Mustang MaxxTM and Entrust ® SC are still the most effective products
• Few products decreased oviposition
• Efficacy varied by life stage• Feeding stimulants improved
some products
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Next Steps
• Testing these products in the field
• In combination with cultural controls– High tunnels
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Acknowledgements• The Rogers Lab
– Mary Rogers, Andy Petran, Claire Flavin, Jared Rubinstein, Nathan Hecht, Ignasi ‘Naxo’ Riera Vila, Heidi Anderson, Truong Nguyen, Sam Villella, Sadie Green, Kenna Ryan
• Advisory Committee– Mary Rogers, Bill Hutchison, Emily Hoover
• The Hutchison Lab– Bill Hutchison, Eric Burkness, Anh Tran,
Dominique Ebbenga
NOTES: Please incorporate one of the provided acknowledgment language options in your presentation, and optional logos as you see fit.
Photo credit: Thanwalee (JiJY) Sooksa-nguan
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Acknowledgements
• Funding for this project was provided by the Minnesota Invasive Terrestrial Plants and Pests Center through the Environment and Natural Resources Trust Fund as recommended by the Legislative-Citizen Commission on Minnesota Resources (LCCMR).