Insect Alert For

Corn Earworm

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Alert Details

A cold front will progress through the corn-growing region late this week and into the weekend. High pressure will move to the east and allow south to southwest winds to increase to the east of the front. There are still a few fresh market and processing growers especially in the upper Midwest and Great Lakes region that may have crops at susceptible stages to damage. As a result, Low corn earworm migration risks remain in place to the east of this front to account for the possibility of isolated moth flights into some of these fields. The risk tonight into Thursday morning is mainly west of US 65 and I-35 across the Plains and into northwest Iowa and Minnesota. The risk then expands east into Wisconsin and northwest Illinois tomorrow night into Friday morning. By Friday night into Saturday, the risk shifts further east into western Michigan and northern Indiana before the front exits the corn-growing region by late in the weekend. No risk is predicted thereafter. Growers that still have crops at susceptible stages to damage should continue to monitor their fields and take appropriate action, if needed, over the next several days.