Acres of YieldGard Corn Borer corn are up, populations of European corn borers have been down, and scouting for second generation larvae is not on the minds of many crop scouts. However, if you do have concerns about this pest in nonBt corn fields, then now is the time to start scouting. Adult moth flight has begun in Iowa. Some of the first moths were collected July 25 in Woodbury County (western Iowa) and July 28 in Boone County (central Iowa).
Iowa State University
Rice, Marlin E., "Second generation corn borer flight begins" (2003). Integrated Crop Management News. 1644.
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