Insect Alert For

Black Cutworm

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

Black cutworm migration risks are on the increase this week as southerly winds accompany very warm to hot conditions across a large portion of the corn-growing region. These southerly winds are in advance of a developing low pressure system in the Plains states that will eventually move east and drag a cold front through much of the region by late week and into the weekend. In the southerly flow, however, black cutworm risks will be present until the front passes. Low risks are predicted tonight into tomorrow generally along/south of I-90 and west of I-55, or from southern South Dakota and Minnesota as far east as southwest Wisconsin and Illinois. Moderate risks are in the forecast tomorrow night into Thursday across portions of Nebraska, South Dakota, Minnesota, Iowa, and Wisconsin as a fairly strong corridor of south to southwest winds sets up. Moderate risks continue in the forecast Thursday night into Friday across portions of Iowa, Minnesota, Wisconsin, and Illinois as the front continues to move east. By late week and into the weekend, the front begins to push through but southerly winds in advance of the front weaken, so only Low risks are found as far east as I-75 in Michigan and Ohio by Friday night into Saturday. Growers should monitor traps as any flights that occur now could be a factor in a few to several weeks given planting progress generally running behind the average pace this spring.