Insect Alert For

Corn Earworm

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Alert Details

A cold front is expected to push through much of the corn-growing region this week. High pressure located in the eastern United States will allow south to southwest winds to persist across the Midwest and Great Lakes region until the cold front passes by the end of the week. As a result, some isolated corn earworm flights will remain possible especially in the northern reaches of the corn-growing region where some fresh market and processing crops may still be at susceptible stages to damage. The risk area is confined mainly in fields along and north of US 36 and generally west of central Michigan for tonight and then as far east as the Michigan and Ontario border by tomorrow night. The risk area does begin to shift east with the front so by Thursday night into Friday, fields mainly east of a line from north of Kansas City to Eau Claire, Wisconsin are at risk and then east of I-57 by Friday night into Saturday as the front continues east. Growers with crops still at susceptible stages to corn earworm damage should continue monitoring their fields and take appropriate action, if needed.