Abstract
Ninety-eight isolates of Rhizoctonia spp., primarily R. solani, were isolated from wheat and sugar beets grown in the Texas Panhandle and typed for anastomosis group (AG). Of the 46 isolates from mature beet, 89% were AG2-2; of the 45 isolates from wheat, 95% were AG4; and most of the isolates obtained from beet seedlings were either AG4 or AG5. Two isolates of binucleate Rhizoctonia sp. also were recovered, one from mature sugar beet and one from beet seedlings. Randomly selected isolates from each AG were capable of colonizing wheat, corn, cotton, and sorghum residue saprophytically; and optimum temperature for growth of most isolates was between 20 and 30 C
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