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Residual and Antifeedant Activity of Landscape Insecticides Against Japanese Beetles. Rebecca Baumler, Bonny Miller, & Daniel A. Potter Department of Entomology. “ Fear No Beetle”. Managing Adult Japanese Beetles In Landscapes. Plant Selection is Priority 1!!. Highly susceptible:.
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Residual and Antifeedant Activity of Landscape Insecticides Against Japanese Beetles Rebecca Baumler, Bonny Miller, & Daniel A. Potter Department of Entomology “Fear No Beetle”
Highly susceptible: Resistant: • Most lindens • Purple leaf plum • Sassafras • Norway maple • Roses • Certain crabapples • Roses • Hibiscus • Red maples • Most oaks • Flowering dogwood • Redbud • Beech • Hickory • Tuliptree • Sweetgum
Traps contain two lures: a floral scent, and the female sex pheromone
“Homeowner” products tested • Neem-away® (azadirachtin) • Pyola® (pyrethrins + canola oil) • Hot Pepper Wax (capsaicin) • Surround® (kaolin clay particle film) • Rotenone/pyrethrins combo • Orange Guard® (limonene) • Garlic Guard® (garlic extract) • Sevin® (carbaryl)
Tagged shoots sprayed • Left in field to weather for intervals of 1 to 19 d • Shoots harvested, leaves challenged with JB
Two of the “organic” products caused severe phytotoxicity: Orange Guard Garlic Guard
Untreated Neem-away Untreated Pyola
Neem (Azadirachtin): Natural insecticide extracted from from seeds of a tropical tree
Summary • Pyrethroids (DeltaGard, Talstar, Scimitar, Tempo) gave at least 19 days’ residual protection; longer than Sevin • Most “homeowner” organic products were ineffective • Pyola® (pyrethrins & canola oil) and Neem-Away® deterred feeding for 3-7 days.
Support Provided By: • UK Nursery/Landscape Research Endowment Fund • USDA New Crops Opportunities Grant • US Dept. of Agriculture “Fear No Beetle”