Foliar symptoms similar to brown stem rot. Light brown or gray discoloration occurs in internal taproot tissue, while pith remains white. Often occurs with soybean cyst nematode, but SCN not necessary for disease to occur. Cool wet soils in early spring favor infection. Plant as late as possible in the spring, and use cultivars from more than one maturity group.
Leaves turn yellow and wilt but remain attached.
Light gray or silver discoloration in taproot and lower stem after flowering. Plants that are under stress from adverse environmental or cultural conditions are more susceptible. Microsclerotia in soil or infected crop residue. Click on an image to display it in larger detail. Slight to severe stunting with slight to severe chlorosis.