Insect Alert For

Black Cutworm

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

Black cutworm migration risks remain in the forecast for the next several nights as persistent south to southwest winds coincide with scattered precipitation areas, resulting in isolated to scattered moth flights in a rather favorable weather pattern for potential migration events. With high pressure in the southeast United States and low pressure systems continually developing and tracking across the Plains states, the corn-growing region is in a favorable location for some black cutworm flights through at least the early to middle portion of the upcoming weekend. Low risks are predicted tonight into tomorrow morning generally from northern Kansas and Missouri north as far as South Dakota, Minnesota, Wisconsin, and southern lower Michigan and as far east as western Ohio. Wind speeds, however, should be a little lighter so only Low risks are in the forecast. Moderate risks are back in the forecast Friday night into Saturday morning especially across northeast Iowa, southeast Minnesota, Wisconsin, northern Illinois, northwest Indiana, and southwest Michigan as south winds increase ahead of a cold front. Rainfall should also be rather common east of the front which may serve as a black cutworm drop zone. Looking further ahead, Low risks remain in the forecast mainly east of the Mississippi River on Saturday night into Sunday morning as mainly light to moderate southerly winds remain in place ahead of a decaying cold front. No risks are predicted thereafter, but growers with recently planted or yet-to-be planted corn especially in the eastern corn-growing region and upper Midwest should continue to monitor for flights and be prepared for these emerging fields to potentially be impacted by black cutworms as we move into June.