Insect Alert For

Corn Earworm

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Alert Details

Portions of the corn-growing region are expected to see increased corn earworm activity this week as a cold front moves from northwest to southeast through the area. South to southwest winds to the east of the front may result in isolated moth flights tonight into tomorrow morning especially across the western and southern portions of the corn-growing region, or from Kansas and Nebraska east into Iowa, Missouri, Illinois, and Indiana. As the front continues moving southeast Tuesday, southwest winds are not only predicted to increase but are also expected to originate from the mid-south region where corn earworms are presently active. As a result, High migration risks are predicted across portions of northeast Missouri, central and northern Illinois, eastern Iowa, southern Wisconsin, southern Michigan, northern Indiana, and northwest Ohio. Moderate risks stretch from the I-35 corridor east into the Great Lakes and eastern Midwest. Trap counts in many areas may already increase this week with second generation moths appearing so additional migrants may increase counts further. No migration risk is predicted after Wednesday morning as high pressure settles back into the Midwest. Growers should be on the alert for new corn earworm moths especially from Iowa and Minnesota east.