| hypovirulence and double-stranded rna in botrytis cinerea. | abstract twenty-one strains of botrytis cinerea isolated from 13 species of plants grown in china were compared for pathogenicity on brassica napus, mycelial growth on potato dextrose agar, and presence of double-stranded (ds)rna. the results showed that the strain canbc-1 was severely debilitated in pathogenicity and mycelial growth, compared with the 20 virulent strains. a dsrna of approximately 3.0 kb in length was detected in canbc-1 and 4 hypovirulent single-conidium (sc) isolates of canbc- ... | 2007 | 18943720 |