The leaf margin may turn tan to brown as diseased plants become progressively more yellow. Severely infected plants may exhibit permanent wilting and premature defoliation. The most diagnostic symptom is reddish-brown to orange streaks within the vascular tissue up to and beyond the first node. It usually is evident after the initial appearance of foliar symptoms during pod fill combined with high temperature stress. Rhizoctonia Root Rot Rhizoctonia root rot symptoms may occur on scattered plants in a somewhat circular field pattern.
Cankers can enlarge with age and become darker and rough-textured and retard plant growth.
The pathogen can invade the central part of the lower stem and produce a brick-red discoloration of older seedlings. Severely infected seedlings or young plants may be killed or break off at the infected and weakened portions of the hypocotyl. Lesions also can develop on pods in contact with the moist soil surface, and cause pod rotting and seed discoloration. Pythium Pythium problems usually are scattered throughout a field, thus the affected sectors do not form a pattern. The pathogen may affect seeds, seedlings, young and older plants, and pods.