Temperatures in the high 90s and low 100s have prompted questions about how this will affect pests in soybeans. Spider mites typically flourish in hot, dry weather. Fungal pathogens that suppress spider mites during high humidity and mild temperatures are less effective against mites during very dry and hot conditions. Therefore, spider mites may be a greater concern this year during early August than soybean aphids.
Iowa State University
Rice, Marlin E., "Spider mites, soybean aphids, and summer temperature" (2006). Integrated Crop Management News. 1329.
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