Insect Alert For

Corn Earworm

Risk Level:
No Risk
Affected Area:
No risk Full page
Alert Details

A predominantly northwest flow weather pattern is predicted across much of the corn-growing region this week. As a result, no corn earworm migration risks are in the forecast until late week when a low pressure system and cold front develop across the Plains and move through the area. Low risks are in the forecast Thursday night into Friday morning from southern South Dakota and southern Minnesota southward into Nebraska, Iowa, Missouri, and northern Kansas as southerly winds increase to the east of the front. Low risks continue in the forecast Friday night into Saturday morning mainly east of I-35 to southwest lower Michigan and Indiana, mainly from southern Minnesota and Wisconsin to the south, as the front continues to the east. With an expected quick movement of the front and rather short duration of southerly winds to its east, only Low risks are in place in association with this weather system. Growers especially in the upper Midwest, however, should continue to monitor traps and scout fields as some moth flights may have occurred in the last week or so.