Our entomological colleagues to the north and northeast are reporting the first soybean aphids of the summer on seedling soybean plants. Eileen Cullen, extension entomologist, University of Wisconsin, reported that in a research plot near Madison on May 24, 8 of 60 plants were infested with 1-13 aphids per plant. Similar populations were found near Arlington on May 30. David Ragsdale, research entomologist, University of Minnesota, reported soybean aphids on V1-stage soybeans in east-central Minnesota during the week of May 28.
Iowa State University
Rice, Marlin E. and O'Neal, Matthew E., "Soybean aphids found in Minnesota and Wisconsin" (2007). Integrated Crop Management News. 1048.
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