A few places in southern and northwestern Iowa have already reported twospotted spider mite populations with prolonged feeding in soybean this year. I recommend scouting corn and soybean fields for mite infestations because they thrive in hot and dry conditions. The U.S. Drought Monitor estimates about 80 percent of Iowa is abnormally dry or in a severe drought as of July 18, 2017.
Iowa State University
Hodgson, Erin W., "Drought Stress Promotes Spider Mite Injury" (2017). Integrated Crop Management News. 2435.
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