Symptoms of Black Root Rot

(Courtesy:  Dr. H. David Shew)

Fig. 1.  Symptoms of infection by T. basicola include stunting of tobacco seedlings and foliar discoloration.

Fig. 2.  Lesions found on the root system.

Fig. 3.  Lesion affecting plant roots and colonization of T. basicola in root tissue.

Fig. 4.  Blackened root tips are characteristic of plants affected with black root rot.

Fig. 5.  Colonization of endospores and aleriospores (chlamydospores) in the root cortex.