Lower stem is gray with internal black flecking of tissue. Most serious when mature plants come under moisture stress. Same as charcoal rot. See the section on charcoal rot. Infection of young pods causes curling and shedding.
Spots also occur on leaves, characterized by a brownish to purple mold growth on underleaf surfaces.
Early defoliation may occur. The disease causing organism is seed-borne. Obtain seed from healthy plants. Field type peas generally are more resistant than garden varieties. Purple hull varieties appear more resistant than blackeyes.