Insect Alert For

Corn Earworm

Risk Level:
Affected Area:
Full page
Alert Details

A potentially active week of weather may lead to increased corn earworm migration risks, especially by the end of the week. Low risks are in place primarily west of the Great Lakes tonight into Tuesday morning and again Tuesday night into Wednesday morning as mainly light south to southeast flow on the west side of high pressure persists. A few isolated moth flights may occur during this time but weak winds precludes a higher risk at this time. By late in the week, a cold front is expected to push northwest to southeast across the whole of the corn-growing region. This front may provide a good chance for at least scattered corn earworm moth flights across much of the corn-growing region both Thursday night into Friday morning across western and northern areas and Friday night into Saturday morning in the Great Lakes region and east of the Mississippi River. Corn earworms are already numerous in many fields across the corn-growing region, and additional moths may be on the way. Growers are urged to scout their fields and take appropriate action if needed especially since crops are coming into susceptible growth stages where damage may occur.