For supposedly being a soybean aphid “off year”, the aphids have been doing surprisingly well during August. Typically the aphid numbers are declining at this time of year because the soybeans are approaching maturity and the temperatures are quite warm. However, this year is slightly different from recent years and you should not let down your guard.
Iowa State University
Tollefson, Jon J. and Rice, Marlin E., "A Final Soybean Aphid Alert" (2008). Integrated Crop Management News. 793.
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