Jim Fawcett, Extension field specialist-crops, and Brad Buchanan, independent crop consultant, both report large numbers of Japanese beetles in soybean in the Cedar Rapids area. On July 14, Brad was collecting as many at 60 to 100 beetles per 20 sweeps with a net (hot spots in the field) and small areas of defoliation were probably showing 50-60 percent defoliation. I collected adults in a soybean field near the Iowa State University Horticultural Farm in Story County on July 19.
Iowa State University
Rice, Marlin E., "Japanese beetles defoliating soybean near Cedar Rapids" (2003). Integrated Crop Management News. 1675.
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