Insect Alert For

Black Cutworm

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

A very favorable weather pattern for black cutworm migration is expected to envelop much of the corn-growing region this week. Moderate risks are found across many states with the area of greatest risk eventually shifting from west to east across the region as the week progresses. Strong south winds are likely to increase and shift east as high pressure settles into the southeastern United States and low pressure develops across the Plains states. Moderate risks are found tonight into tomorrow morning from northern Kansas, eastern Nebraska, and southeast South Dakota as far east as Lake Michigan, with Low risks east into southern lower Michigan, Indiana, and western Ohio. Moderate risks continue tomorrow night into Wednesday morning as far east as southwest lower Michigan and Indiana, with Low risks into southern Ontario, Canada and Ohio. As a cold front begins to move slowly southeast by mid-late week, the primary migration risk will focus mainly across the eastern corn-growing region Wednesday night with Low risks lingering across the southeastern corn-growing region Thursday night into Friday morning. While there is no threat to crops, flights that occur now should be documented with heat unit accumulations beginning once a flight of note is observed which may occur this week in some areas.