Insect Alert For

Corn Earworm

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

Corn earworm migration risks will be on the increase as we head into late week and especially next weekend. Northwest flow is expected to transition to zonal and eventually southwest flow by that time. Given crop stage in both corn earworm source regions in the southern and mid-south states and across the main corn-growing region, an increased risk for flights north exists as crops in southern source regions are not as attractive to corn earworm moths compared to even a week or so ago. As southerly winds begin to increase mainly in the Plains but a little further east into the corn-growing region, also, Low migration risks are predicted tomorrow night into Friday mainly west of the Mississippi River. Moderate risks then enter the forecast across northeast Nebraska, eastern South Dakota, Minnesota, northern Iowa, and into far western Wisconsin Friday night into Saturday, with Low risks east to Lake Michigan and into Illinois. Moderate risks are also predicted Sunday night into Monday from northern/central Iowa and southeast Minnesota as far east as southwest lower Michigan and northern Indiana as a cold front begins to nudge its way southeast into the upper Mississippi River valley. Growers especially along/north of I-80 are encouraged to monitor traps by the weekend and into next week as an increasing chance for new moth arrivals is predicted with a return to a more summer-like weather pattern.