Small, angular, water-soaked spots on leaves turn red-brown to black as tissue dies and dries. Spots may have a water-soaked margin and a yellow halo. As leaves grow and flex, dead tissue falls out, and leaves may appear tattered and ragged. Seed may be colonized, becoming shriveled with sunken, discolored lesions. Infected soybean residue or seed borne inoculum is spread to plants by wind-driven rains. Early infections may appear severe, especially in wet weather, but hot dry conditions stop disease development.