Insect Alert For

Corn Earworm

Risk Level:
Moderate Risk Level
Affected Area:
Full page
Alert Details

A strong cold front will continue to push southeast through the corn-growing region in the next 24-48 hours. Ahead of the front, south to southwest winds along with scattered to widespread precipitation may lead to scattered corn earworm moth flights especially from source regions in southern Missouri and Arkansas north into far northern Missouri, eastern Iowa, far southeast Minnesota, central and southern Wisconsin, and northwest Illinois where a Moderate migration risk is in the forecast tonight into early tomorrow morning. Low risks extend as far north as northern Wisconsin and east into the western lower Michigan peninsula and also into Indiana. Growers especially west of Lake Michigan should monitor traps and moth activity in fields as some migrants may already have or could be arriving in these areas through tomorrow morning. Once the front clears the corn-growing region, northwest flow once again takes hold across much of the area and effectively ends the migration risk through the rest of this forecast period (into next weekend).