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Masked Chafers

June 22, 2005

Annual white grub adults, also known as masked chafers (Cyclocephala), were observed in high numbers in Little Rock, Arkansas, on June 9. Assuming progression of emergence as one moves north, these insects should become numerous in southern Illinois during the week of June 20, which is about 10 days earlier than normal for that part of the state. Based on the flight of these beetles and Japanese beetle, along with weather patterns, decisions on white grub insecticide applications to turf can soon be made. The dry weather over most of the state combined with weather conditions last fall and winter means that white grub numbers are likely to be high. As we continue to see the size of masked chafer and Japanese beetle emergences, we will then make our recommendations for control.

Author: Phil Nixon


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