Insect Alert For

Corn Earworm

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

Isolated corn earworm migration risks remain in the forecast especially west of Lake Michigan for the next 4-5 days as a rather persistent weather pattern remains in place. South to southwest winds are anticipated to blow north from the Plains and southern corn-growing region into the remaining processing and fresh market fields in the northern corn-growing region through early next week. Low risks are in place tonight into tomorrow morning from northeast Nebraska and far southeast South Dakota into northern Iowa, southern Minnesota, and far southwest Wisconsin. Low risks continue tomorrow night into Thursday morning from roughly the same risk area as tonight but potentially further northeast into eastern Minnesota and Wisconsin as well as far northwest Illinois. A brief break in the risk is then anticipated by late week and into the first part of the weekend as southerly winds focus further west in the Plains states, but Low risks are back in the forecast across mainly northern Iowa and Minnesota Saturday night into Sunday as a cold front begins moving east. Growers with crops still at a critical stage of growth should continue to monitor traps and take action where needed as moth flights remain possible even this late in the growing season given the overall weather pattern.