Insect Alert For

Corn Earworm

Risk Level:
No Risk
Affected Area:
No risk Full page
Alert Details

Southwest flow is expected to return to the corn-growing region by late this week and into the upcoming weekend. As a result, corn earworm migration risks will be on the increase, as well, with Moderate risks now in the forecast across a large portion of the northern corn-growing region over the weekend prior to a cold front passage early next week. Growers with crops still at susceptible stages to damage should monitor traps and scout fields regularly beginning this weekend and continuing into next week. Low risks are initially in place across the Plains states tomorrow night into Friday morning as southerly winds initially increase, but then Moderate risks are found from Nebraska and eastern South Dakota into Minnesota and Iowa Friday night into Saturday morning, then from Iowa, far northern Missouri, northern/central Illinois, and Wisconsin Saturday night into Sunday morning, and finally from eastern Illinois into northern Indiana, Ohio, and southern lower Michigan Sunday night into Monday morning. There are still some discrepancies with regards to the speed of the cold front early next week, so future forecasts may adjust the elevated risk areas but the underlying theme is a potential corn earworm moth flight is possible across a large portion of especially the northern corn-growing region this weekend.