Insect Alert For

Corn Earworm

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

After a few nights of no corn earworm migration risk due to unfavorable wind flow, a return to summer like weather is expected by late week and likely continuing into early next week, as well. Heat and humidity are expected to build north on increasing southerly winds by that time, and these southerly winds may also contain some corn earworm moths. As a result, Low corn earworm migration risks are in the forecast beginning Thursday night into Friday morning primarily west of Lake Michigan and especially along/north of I-80 from eastern Nebraska and South Dakota into Wisconsin and Illinois. Low risks expand east into the southern Great Lakes and eastern corn-growing region Friday night into Saturday morning, but then focus back west of Lake Michigan Saturday night into Sunday morning in response to a new area of low pressure developing in the Plains states. Growers with crops still at susceptible stages to damage should monitor traps and scout fields regularly as several areas especially in the northern corn-growing region have observed corn earworm flights this month and additional moths may be on the way later this week into next weekend.