Insect Alert For

Corn Earworm

Risk Level:
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Alert Details

An extended period of southerly to southwesterly winds encompassing much of the Corn Belt that may lead to isolated corn earworm migration risks is predicted the next five days. Low pressure will slowly develop in the western and southern Plains region the next 24 hours and then advance northeast into the Great Lakes region by early next week. High pressure is expected to remain in the southeast United States so a rather persistent south to eventually southwest wind is likely to occur between the two pressure centers for the duration of the forecasting period. Low corn earworm migration risks initially reside across the Plains and into the western Midwest through midday Friday before moving east into the Mississippi River valley for Friday night into Saturday morning. The risk area becomes oriented from southwest to northeast as a cold front settles into the Corn Belt next week, and the greatest migration risk may lie in the eastern Corn Belt especially from Illinois into Ohio and potentially as far north as southeast Wisconsin, southern Michigan, and potentially into southwest Ontario, Canada by next Monday and Tuesday. Low trap counts in the source region in addition to the time of year continues to preclude increased risks at this time.