Insect Alert For

Corn Earworm

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

Moderate corn earworm migration risks are predicted tonight into tomorrow across northeast Nebraska, eastern South Dakota, Minnesota, northern Iowa, and western Wisconsin with Low risks extending east as far as central lower Michigan and into northern Indiana. A cold front will begin moving slowly southeast from the Plains states into the western corn-growing region over the next 24 hours, and will divide southerly wind flow from northwesterly flow behind the front. Mid-south and southern corn-growing region corn earworm moths may fly north in this pattern that has been in place now for several days, and could lead to some additional scattered moth flights into especially the Moderate risk area. Low risks accompany the front to the southeast tomorrow night into Sunday, with risks focused especially along and east of the I-35 corridor from Iowa and southeast Minnesota and points east into the southern Great Lakes region and eastern corn-growing region. Little to no migration risk is predicted once we get into next week, but growers with crops still at susceptible stages to damage, especially fresh market and processing growers, should continue to monitor traps and scout fields until harvest or the crop advances in growth past critical growth stages.