Moths began arriving in the state on April 15, first appearing near Janesville in Rock County. The first significant flight was registered in Dodge and Grant counties from May 6-7 and the primary cutting period was predicted to start by May 28. Spring planting delays and rampant weed infestations created very favorable outbreak conditions this year, but widespread cutworm problems failed to develop. The spring migration of 577 moths collected from April 16-June 5 was much smaller than last year’s flight of 2,601 moths and damage to emerging corn was not as prevalent or severe as expected.
Soil Science Extension
University of Wisconsin Madison