| pectic zymogram variation and pathogenicity of rhizoctonia solani ag-4 to bean (phaseolus vulgaris) isolates in isfahn, iran. | rhizoctonia disease, caused by rhizoctonia solani is one of the most important fungal diseases in bean fields in isfahan, iran. bean plants showing stem and root cankers were collected and rhizoctonia-like fungi obtained from the samples were identified by anastomosis. pure cultures of bean isolates of r. solani were identified as ag-4. there were also ag-4 isolates from tomato, potato, cucumber, alfalfa and sugar beet in the areas sampled. a total of 163 isolates of r. solani ag-4 originating f ... | 2004 | 15645177 |