Sensitivity of Rhizoctonia Solani to Selected Fungicides in Vitro

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Abstract

Four fungicides were tested in vitro for their effectiveness to inhibit the linear growth of four isolates of Rhizoctonia solani representing 2-anastomosis groups (AG4 and AG5). R. solani isolates were isolated from vegetable crops in Riyadh region. The isolates were exposed to range of concentrations of four fungicides (Bayfidan, Benlate, Rhizolex and Terraclor), in which they differed in their susceptibility to the selected fungicides. AG4 isolates were highly sensitive while, isolates of R. solani AG5 were less sensitive to the tested fungicides.

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