Insect Alert For

Corn Earworm

Risk Level:
Low
Affected Area:
Full page
Alert Details

A change in the weather pattern over the next several days may lead to one of the better chances for corn earworm migration this growing season, especially given time of year, crop stage both in the source region and further north in the corn-growing region, and a favorable weather pattern all expected to coincide especially this weekend. Southerly winds are likely to begin developing later today and continue into tonight out across the Plains states, and a Low risk is in place from northern Kansas as far north as South Dakota and southwest Minnesota to account for mainly isolated moth flights. Moderate risks are then in the forecast on a nightly basis from tomorrow night through Sunday night/Monday as south to southwest flow continues to increase and spreads east. Moderate risks are in place tomorrow night from northeast Nebraska into southeast South Dakota, Minnesota, Iowa, and western Wisconsin. Moderate risks continue Saturday night into Sunday morning from northern Missouri into Iowa, southeast Minnesota, Wisconsin, and northern/central Illinois, with the same risk level in place across northern Illinois into northern Indiana, far northwest Ohio, southern Wisconsin, and southwest lower Michigan Sunday night into Monday morning ahead of a cold front passage early next week. Growers with crops at susceptible stages to damage should monitor traps and scout fields as scattered corn earworm moth flights are predicted to occur this weekend.