Residual and Antifeedant Activity of Landscape

Insecticides Against Japanese Beetles

Rebecca Baumler, Bonny Miller, & Daniel A. PotterDepartment of Entomology

“Fear No Beetle”

Managing Adult Japanese Beetles In Landscapes

Plant Selection is Priority 1!!

Highly susceptible:

Most lindens Purple leaf plum Sassafras Norway maple Roses Certain crabapples Roses Hibiscus

Resistant:

Red maples Most oaks Flowering

dogwood Redbud Beech Hickory Tuliptree Sweetgum

Traps contain two lures: a floral scent, and the female sex pheromone

Traps were evaluated in home landscapes and on golf courses

No trap 3.1m 9.3m 3.1m 9.3m0

20

40

60

80

100M

ean

% d

efol

iatio

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Upwind Downwind

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Professional / HomeownerProfessional Active ingredient HomeTalstarOne bifenthrin Ortho Onyx bifenthrin Bug-B-GonAstro permethrin ManyScimitar GC L-cyhalothrin Spec - TriaDeltaGard T&O deltamethrin Tempo SC cyfluthrin Multi-

Insect Bayer Advanced cyfl./imidacloprid Rose &

FlowerSevin SL carbaryl Bayer

“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)

Tilia cordata (littleleaf linden) used for all trials

Tagged shoots sprayed

Left in field to weather for intervals of 1 to 19 d

Shoots harvested, leaves challenged with JB

7d 14d 19dResidue Age

0

400

800

1200

1600

2000

Feed

ing

dam

age

(mm

2 )

Sevin Talstar Deltagard Tempo Scimitar Untreated

Pyrethroids Provide at least 19 Days Control!

Orange Guard

Garlic Guard

Two of the “organic” products caused severe phytotoxicity:

0 300 600 900 1200 1500

Feeding Damage (mm 2)

No-choice feeding on 1d residuesSevin

Pyola

Neem-Away

Rotenone-Pyrethrins

Pepper Wax

Untreated

Surround

Surround® (kaolin clay) did not deter feeding

Neem-away

Untreated

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”