Our first official sighting of soybean aphids occurred in soybeans on May 31 near Ames in Story County. Students in the Soybean Entomology Research Laboratory found several winged aphids and a few colonies on V3-stage soybeans. One colony had about 40 aphids, indicating that the aphids had probably been there for about a week. The following day, soybeans were inspected at McNay Research and Demonstration Farm, Lucas County, and Northeast Research and Demonstration Farm, Floyd County, but no soybean aphids were found in those research plots.
Iowa State University
Rice, Marlin E. and O'Neal, Matthew E., "First soybean aphids found in May" (2006). Integrated Crop Management News. 1297.
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