Insect Alert For

Corn Earworm

Risk Level:
Moderate Risk Level
Affected Area:
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Alert Details

A quick-moving low pressure system and attendant cold front will press from northwest to southeast across the corn-growing region in the next couple days. A period of focused south to southwest winds is predicted in advance of this cold front, and some scattered areas of precipitation are also likely along the front. As a result, a Moderate risk for corn earworm migration is predicted tonight mainly for the potential for scattered moth flights across portions of eastern Kansas, southeast Nebraska, much of Iowa, far western Illinois, and Missouri. Low risks extend north into the upper Midwest and mainly west of Lake Michigan and I-57 in Illinois. A Low risk continues Tuesday night into Wednesday mainly east of I-35 and south of I-90 west of Lake Michigan and south of I-96 east of Lake Michigan to near I-75 in Ohio. As the next weather system develops in the Plains by late week, a Low migration risk returns to the Plains states and western Midwest by that time. Growers all across the corn-growing region should monitor their fields closely regardless of migration risk as the second generation of this insect is expected to develop from local populations in the next week or so if it has not already started.