Insect Alert For

Black Cutworm

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Alert Details

Black cutworm migration risks will be on the increase once again this week as a series of strong low pressure systems and resultant very warm to hot conditions and gusty southerly winds return to a large portion of the corn-growing region. Low risks are in place tonight into tomorrow mainly from Kansas and Missouri as far northeast as Minnesota, Wisconsin, and southern lower Michigan and east into western Ohio as gusty south to southeast winds ahead of a weak cool front may result in some moth flights into this region. Low risks then re-focus back west into the Plains and western corn-growing region in response to a stronger developing low pressure in the High Plains. Moderate migration risks in stout southerly winds are already being predicted Wednesday night into Thursday across portions of Nebraska, South Dakota, Iowa, Minnesota, and western Wisconsin with this Moderate risk area shifting just a little east into more of Wisconsin and northwestern Illinois Thursday night into Friday as a cold front begins to push southeast. Late week and into the early portion of the weekend, Low risks then blanket much of the southern Great Lakes and central/eastern corn-growing region generally along/west of I-75 but overall, wind speeds should decrease by Friday/Saturday, thus the need for lower risks. Given the generally later planting ongoing this spring, any flights now could be a factor late this month or into June so traps should be monitored and any flights documented for potential new generation emergence dates.