Insect Alert For

Corn Earworm

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

Corn earworm migration risks remain in the Low category for the next five days as northwest flow is expected to dominate the weather through the weekend. A quick-moving low pressure system and cold front may bring an isolated migration threat initially to the Plains and western Midwest tomorrow night into Friday morning with the risk then shifting east and stretching from Kansas and Missouri northeast into eastern Iowa, Illinois, southern Wisconsin, Indiana, southern lower Michigan, and western Ohio by Friday night into Saturday. The source region should be focused across Texas and Oklahoma so any moth flights should remain isolated with this cold front. Once the cold front passes, no migration risk is predicted as northwest winds and cooler weather return once again to much of the corn-growing region. Growers are advised, that despite the lack of recent migration events, there are still reports of corn earworm larvae causing damage in many commercial, processing, and fresh-market fields as well as specific vegetable crops across the corn-growing region so scouting remains important as earlier moth flights this summer are now advancing into the next generation.