Insect Alert For

Corn Earworm

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

A rather strong cold front for this time of year is predicted to push southeast through the middle of the corn-growing region over the next 24 hours. Eventually, this front will likely push all of the way out of the eastern corn-growing region by tomorrow. Before it does so, however, an increased Moderate corn earworm migration risk is predicted for tonight into tomorrow morning from southeast Missouri into southern and eastern Illinois, western and central Kentucky, Indiana, western Ohio, and southern lower Michigan. Low risks extend back to near the Mississippi River and north into southeastern Wisconsin, but the greatest migration threat does appear to be in the eastern corn-growing region and southern Great Lakes area. A break in the migration risk is then predicted tomorrow night into Saturday morning as northwest flow briefly visits much of the corn-growing region. By Saturday night into Sunday, however, southerly winds are likely to return to the Plains so Low risks are back in the forecast, and this Low risk spreads east with each night. By next Tuesday morning, the Low risk envelops fields as far east as southwest lower Michigan and Indiana, and north to the I-94 corridor west of Lake Michigan. Growers with crops at susceptible stages to damage from corn earworm are encouraged to monitor traps closely as some scattered flights are expected overnight tonight into tomorrow morning especially east of the I-55 corridor from southeast Missouri through central Illinois and points east.