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 with the potential for another scattered moth flight into portions of the northern corn-growing region over the weekend and especially early next week. Fresh market and processing growers with crops at susceptible stages of growth should continue to monitor traps and scout fields in addition to preparing for another potential flight that could linger corn earworm risks well into September. Low risks are initially in place to the east of a developing low pressure system across the High Plains on Friday night into Saturday morning, mainly along and west of the I-35 corridor from Nebraska and Iowa north into South Dakota, Minnesota, and potentially southeast North Dakota. Moderate risks enter the forecast Saturday night into Sunday morning across far northeast Nebraska, eastern South Dakota, Minnesota, northern Iowa, and far western Wisconsin as south to southwest winds increase across this region. Moderate risks then continue in the forecast mainly across eastern Iowa, southeast Minnesota, Wisconsin, and northern/central Illinois Sunday night into Tuesday morning. Low risks extend to near the I-75 corridor by early next week, as well, but the overall aggressiveness of the level of risk in this area has not been increased or extended further east due to forecast uncertainties and interactions in association with Tropical Storm Hermine which is expected to track near the eastern coast of the United States. This system could block additional weather makers from pushing further east at the normal rate, thus risks across the eastern corn-growing region are being kept in the Low risk at this time.