Insect Alert For

Corn Earworm

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

As a cold front continues to push east through the Great Lakes region today and tonight, south to southwest winds are predicted to the east of the front along with scattered to numerous areas of precipitation. Moderate corn earworm migration risks are in place mainly to the east of I-69 and US 127 in Indiana and southern Michigan which includes southeast lower Michigan, northeast Indiana, northern Ohio, and southwest Ontario, Canada. Growers in this region should be prepared for some scattered corn earworm flights in the next 24 hours. Much of the corn-growing region should be in between weather systems tomorrow into tomorrow night, but southerly winds across a portion of the Plains and western Midwest may provide enough of a chance of some isolated moth flights that a Low risk is in place across Nebraska, Kansas, western Iowa, and far western Missouri. Moderate risks return to the forecast mainly west of I-35 across Nebraska, western Iowa, southern Minnesota, eastern South Dakota, and also just east of I-35 into western Wisconsin by Friday night into Saturday as southerly winds really increase and precipitation chances return which may serve as insect drop zones ahead of a cold front. The Moderate risk area shifts east of I-35 Saturday night into Sunday as the front moves east, and includes southeast Minnesota, eastern Iowa, northern Illinois, and central/southern Wisconsin. Growers especially north of I-80 should monitor traps closely in the next week, especially if crops are at a susceptible stage to corn earworm damage as at least scattered moth flights are predicted in the next week across much of the upper Midwest into the Great Lakes region.