Two-spotted Spider Mites in Soybeans

Two-spotted spider mites (TSM) are being found in many soybean fields across the upper midwestern US. Reports from MN, ND, SD and WI in late July 2006 indicate that this pest is at significant levels in the margins of many soybean fields. If the current hot, dry conditions persist, spider mites are likely to continue to expand across these areas during the next several weeks. This Field Facts by Jim Boersma explains the life cycle, damage and treatment options for two-spotted spider mites in soybeans.

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