Characterization of Rhizoctonia solani Isolates from Canola in West Central Alberta. S. F. Hwang, Plant Pathologist, Alberta Environmental Centre, P.O. Bag 4000, Vegreville, Alberta, Canada T0B 4L0. T. A. Swanson, Deceased; and I. R. Evans, Plant Pathologist, Alberta Agriculture, 7000 113 Street, Edmonton, Alberta, Canada T6H 5T6. Plant Dis. 70:681-683. Accepted for publication 8 January 1986. Copyright 1986 The American Phytopathological Society. DOI: 10.1094/PD-70-681.

From 69 isolates of Rhizoctonia solani recovered from diseased plants of canola in the west central region of Alberta, two anastomosis groups, AG-2 (50 isolates) and AG-4 (10 isolates), were found on the basis of pairing with known anastomosis group tester cultures. Isolates in AG-2 were more pathogenic to Brassica napus than those in AG-4.