Insect Alert For

Corn Earworm

Risk Level:
Moderate Risk Level
Affected Area:
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Alert Details

A cold front is predicted to advance from northwest to southeast through the corn-growing region in the next several days. A rather strong area of high pressure in the eastern United States will provide the necessary pressure gradient in between the front and high pressure center to result in fairly strong low-level south to southwest winds. Scattered corn earworm moth flights will be possible in this southerly wind corridor and a Moderate migration risk is in place tonight into Wednesday morning across portions of northeast Kansas, northern Missouri, central and northern Illinois, Iowa, southeast Nebraska, southeast Minnesota, and Wisconsin. Low risks are found as far east as southwest Ontario, Canada into Ohio. After mid-week, the front moves east but does weaken. As a result, only Low risks remain mainly east of I-35 on Wednesday night into Thursday and then east of I-57 and Lake Michigan by Thursday night. No risk is predicted thereafter as lighter winds and high pressure settle into the corn-growing region. Fresh market and processing growers especially in the upper Midwest are urged to monitor their late-planted fields for signs of corn earworm in the next week.