Insect Alert For

Corn Earworm

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

A cold front is predicted to pass through the majority of the corn-growing region between now and Saturday. As the cold front moves southeast, southwest winds in advance of the front may pose a scattered corn earworm moth migration risk in fields especially northwest of a line from extreme southeast Kansas to the western shores of Lake Michigan tonight into Friday morning. A Moderate corn earworm migration risk is in place in this area. The cold front continues southeast Friday into Saturday and the migration risk shifts southeast with the front. A Moderate risk continues across portions of Missouri, Illinois, Kentucky, Indiana, Ohio, Michigan, and southwest Ontario, Canada tomorrow night into Saturday morning. After this cold front moves through, another low pressure system is predicted to develop in the Plains. Increasing south to southwest winds to the east of this low pressure system may result in additional corn earworm migration risks for much of the corn-growing region in the extended forecast period. There are still some uncertainties in the placement of critical weather features and eventual precipitation chances that may lead to insect drop-out, so broad-brushed Low risk are in place for now. Higher risks will likely be needed for next week once forecast confidence increases.