Insect Alert For

Corn Earworm

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

Corn earworm migration risks are in the forecast tonight into tomorrow morning as a warm front currently extending from the Plains into Missouri and Illinois begins to lift north today and tonight. South to southwest winds south of this front may lead to some isolated moth flights to the north where the moths may encounter precipitation overnight tonight into tomorrow morning. Given crop stage, the risk is primarily targeted at fresh-market and vegetable growers and the overall risk level is in the Low category. Fields mainly south of I-90 and west of I-57 in eastern Illinois are at risk. Tomorrow night into Thursday morning, a cold front will likely push southeast through the corn-growing region. To the southeast of this front, southwest winds should be rather common but precipitation may also become more widespread which may limit some migration risk. Still, Low risks are warranted mainly south of a Dodge City, Kansas to Chicago line across the southern and eastern corn-growing region. The next mainly isolated corn earworm migration risk comes back into the forecast by late week and into next weekend with the next cold front – risks are found mainly west of Lake Michigan Friday night and then push into the upper Midwest and Great Lakes region in addition to points south in the Mississippi River valley by Saturday night into Sunday.