Insect Alert For

Corn Earworm

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

An active late-growing season weather pattern is predicted across the corn-growing region this week as a cold front slowly moves east through the area. High pressure will be located across the eastern United States, so southerly winds will be prevalent across a large portion of the corn-growing region until the cold front passes through. As a result, corn earworm migration risks are in the forecast daily through early next weekend. Low risks are found mainly from the eastern Plains into the southwest Great Lakes region tonight into tomorrow morning. A Moderate risk is in the forecast across Minnesota, Wisconsin, northern Iowa, and northern Illinois tomorrow night into Wednesday morning as southerly winds are predicted to be their strongest during this time. Scattered moth flights may impact especially fresh-market and processing fields in the upper Midwest during this time. Low risks are then found mainly across the central and eastern portion of the corn-growing region for the extended portion of the forecast period as the front slowly moves east. Growers with crops still at susceptible stages to damage, especially in the upper Midwest, should monitor traps and scout fields as some additional moth flights are predicted this week.