The grape colaspsis, an uncommon beetle (and one that also is hard to pronounce), has caused significant problems in corn in northeastern Iowa. Jim Fawcett, Iowa State University Extension field specialist-crops, and I examined fields in Benton County in late June with stand loss problems. This past week, Jim Webster (Pioneer Hi-Bred) reported significant stand damage in Blackhawk, Grundy, and Tama counties. He stated that this problem has significantly increased during the past 3 years.
Iowa State University
Rice, Marlin E., "Grape colaspis in Iowa corn" (2003). Integrated Crop Management News. 1657.
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