Insect Alert For

Corn Earworm

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

A cool front is expected to continue pushing southeast through the upper Midwest into the Great Lakes and southeastern corn-growing region by tomorrow. To the southeast of the front, continued southwest flow and rain chances will continue. As a result, Low corn earworm migration risks are in the forecast but with lighter overall wind speeds, any flights should be more isolated in nature. A break in the migration risk is predicted on Thursday and Friday night, with Low risks returning to fields mainly south of US 14 in South Dakota and Minnesota and mainly west of I-55 in Illinois by Saturday night into Sunday morning as a new low pressure area develops in the far western Plains and southerly winds increase in fields especially west of the Mississippi River. The Low risk expands east into eastern Illinois by Sunday night into Monday, but also shifts a little further south as a precipitation-induced frontal boundary works its way south. Growers should continue to monitor traps and take appropriate action where needed, especially in fields with non-Bt traits and fresh market growers.