No. 5 Article 2/May 7, 2010

Black Cutworm Spraying Under Way in Some Central and Southern Illinois Areas

Over the past week I have received a few reports of fields being sprayed for black cutworms. On May 4 a field near Sherman (Sangamon County) was treated. Black cutworm activity also has been reported in some areas of southern Illinois, including St. Clair County. Intense flights continue to be reported in some areas of the state. John Fulton, county extension director for Logan County, indicated that an intense flight occurred there on April 29. Growers are encouraged to carefully scout any cornfields that were planted late (relative to nearby fields), especially those with an abundance of winter annual weeds and heavy residue. As corn matures beyond the 4-leaf stage of development, it will become less susceptible to cutting. Often small pinhole leaf feeding by black cutworms is an early indicator of potentially more significant cutting that may occur later. If fields are being treated in your area, please let me know and I will share this information with our readers.

Black cutworm leaf feeding injury.

--Mike Gray

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