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Counties with black cutworm moth traps (click on a highlighted county to see trap captures)

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NameIllinois Black Cutworm Monitoring 2012

Black cutworms do not overwinter in Illinois. The bulk of the spring population migrates into Illinois from southern states beginning as early as March. Factors that favor black cutworm outbreaks include late planting, heavy infestations of winter annual weeds before tillage and planting, reduced tillage, and corn grown after soybean. Fields with combinations of these factors are more attractive to migrating moths and are likely candidates for egg laying. They should be monitored closely as corn emerges.

Young larvae will feed on plants, resulting in small, irregular shaped holes. They begin cutting plants at the fourth instar. One cutworm larvae may cut an average of three to four plants during its lifetime.


Black Cutworm Factsheet