The soybean aphid has completed its march across Iowa and can now be found near the Nebraska border. Hal Tucker (Tucker Consulting, Storm Lake, IA) reported finding aphids in Woodbury County during late August, and I found soybean aphids just east of Correctionville on September 3 and south of Holstein in Ida County. Aphid densities were extremely low, less than one aphid per 25 leaflets.
Iowa State University
Rice, Marlin E., "Soybean aphids move toward Nebraska border" (2001). Integrated Crop Management News. 1964.
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