Insect Alert For

Corn Earworm

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

A continued active weather pattern is expected across the corn-growing region this week. As a result, corn earworm migration risks are in the forecast at some point this week for much of the area including a Moderate risk Tuesday night into Wednesday morning across the heart of the corn-growing region. A cold front is expected to push from northwest to southeast initially from the Plains states today into the eastern Midwest and Great Lakes region by the end of the week. South to southwest winds will be common and somewhat gusty at times to the east of the front as it moves east. The primary focus tonight will be especially west of a line from south of Saint Louis, Missouri to Grand Rapids, Michigan where a Low risk is in place. A Moderate risk is inserted into the forecast in portions of Kansas, Missouri, Nebraska, Iowa, Illinois, Minnesota, and Wisconsin by Tuesday night into Wednesday morning as this is the time when south to southwest winds are expected to be the strongest and originating from an active corn earworm source region. Low risks continue into the eastern corn-growing region and Great Lakes area for late week before the front finally passes east and weakens. Fresh market and processing growers are urged to monitor their fields in the next week as new corn earworm flights are possible, and stay tuned for more details in subsequent forecasts this week.