Insect Alert For

Corn Earworm

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

Following a departing cold front, northwest flow is expected to lock in across much of the corn-growing region for the next few days with cooler temperatures and less humidity. With a lack of southerly winds, little to no corn earworm migration risk is predicted through Thursday. By late week and into the weekend, however, the pattern is expected to change again, and should offer the opportunity for corn earworm moths to migrate north on increasing south to southwesterly winds. Low risks are initially in place west of Lake Michigan Thursday night into Friday and then overspread much of the northern corn-growing region and into the Great Lakes and eastern corn-growing region by the weekend. Risk upgrades are likely once forecast confidence and cold front passage timing are increased, potentially as soon as tomorrow’s forecast, so stay tuned to subsequent forecasts this week.