A significant flight of black cutworm adults (moths) arrived in Iowa the weekend of April 18, based on pheromone trap capture data across the state. This insect is an occasional pest of seedling corn that sometimes causes significant damage in a few fields. This year trap cooperators monitored 66 traps in 47 counties. Based upon their reported data, we anticipate that first cutting of seedling corn should occur May 17-18 across southern Iowa, May 18-20 across central Iowa, and May 22-23 across northern Iowa, as indicated on the map below.
Iowa State University
Rice, Marlin E.; Pope, Richard O.; and Tollefson, Jon J., "Black Cutworm Scouting Advisory—2008" (2008). Integrated Crop Management News. 936.
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