Rhizoctonia solani structures
Rhizoctonia Diseases in Tobacco Greenhouses
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| 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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