Rhizoctonia solani
structures
Rhizoctonia Diseases in Tobacco Greenhouses

Figure 18 (top left). Mature hyphae of Rhizoctonia solani are brown, septate, with 90 degree branching, and a constriction at the base of the branch. Young hyphae are colorless.
Figure 19 (top right). A group of hyphae form the mycelium that on infected plants may be observed as a brown spiderweb-like structure around infected tissue.
Figure 20 (bottom). Mycelium of Rhizoctonia solani in a culture medium. Two strains of of this pathogen are AG3 (responsible of target spot) and AG4 (responsible of damping-off).

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Distributed in furtherance of the Acts of Congress of May 8 and June 30, 1914. Employment and program opportunities are offered to all people regardless of race, color, national origin, sex, age, or disability. North Carolina State University at Raleigh, North Carolina A&T State University, U.S. Department of Agriculture, and local governments cooperating.

Reformatted August 2001