Insect Alert For

Corn Earworm

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

Increased corn earworm migration risks are in the forecast tonight into tomorrow morning as a favorable pattern for long-distance migration will be in place. Moderate risks are found across portions of the upper Midwest from Minnesota south into northern Iowa and east into northwest and north central Illinois as well as Wisconsin. Low risks extend from the Plains east into Indiana and southwest lower Michigan, and as far north as the I-94 corridor in North Dakota. South to southwest winds will be rather common and scattered moth flights are possible especially into active growing areas in the upper Midwest where some processing and fresh-market crops are still at susceptible stages to damage. Low risks continue in the forecast through midday Saturday with the risk eventually shifting into the Great Lakes and eastern Midwest regions. The Low risk area tomorrow night into Thursday morning is essentially the same as the Low risk tonight into tomorrow morning, or from the Plains east into southwest lower Michigan and Indiana. The Low risk then shifts east into Ohio and southwest Ontario, Canada by Thursday night into Friday, and then focuses to the east of I-35 into the Great Lakes region and eastern Midwest by Friday night into Saturday as another wave of low pressure moves northeast along the front by that time. Growers with crops still at susceptible stages to damage should continue to monitor traps and scout fields, especially from the upper Midwest east into the Great Lakes region.