Issue 11, July 12, 2013

Japanese Beetles

Adult Japanese beetles continue to be spotty throughout the state with many areas having low numbers and correspondingly minor feeding damage on trees and shrubs. We have received reports of high numbers and damage in northwestern Illinois from New Bedford, Macomb, and Wyoming, IL. There are also reports of high numbers in north-central Illinois near Rockford.

Japanese Beetle Larven in Root Zone

Japanese Beetle Adults on Pawpaw

These beetles will continue to be present in high numbers in these areas until early to mid-August. They are effectively controlled with a spray every two weeks of carbaryl (Sevin) or a pyrethroid, such as cyfluthrin (Tempo) or permethrin (Astro).

Phil Nixon

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