Armyworms have been reported by Jim Jensen, extension field specialist-crops, defoliating a field of young corn in Lee County. These insects rarely causes losses in conventional-tilled fields, but they should be scouted for in minimum- or no-tilled fields with any kind of living ground cover. The moths migrate from the southern United States, similar to black cutworms, and are attracted to fields that were planted into a cover crop such as rye, or where grassy weeds exist.
Iowa State University
Rice, Marlin E., "Armyworms in young corn" (2000). Integrated Crop Management News. 2014.
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