关键词: 丝核菌病, 分离方法, 修订茎定殖法, 植物病害, 土壤真菌

Abstract: After having immersed dry buckwheat stems in the Dexon aqueous solutions of O, 10^-3, 10^-4, 10^-5, 10^-6, and 10^-7 different concentrations, the buckwheat colonization method is used for isolating Rhizoctonia spp. from eight soils naturally infested with Rhizoctonia spp., one soil artificially infested with Rhizoctonia spp. and one soil artificially infested with Rhizoctonia spp. and otrer fungi. The result indicates that by using revised buckwheat colonization method, it is dry buckweat stems immersed in the Dexon aqueous solution of 10^-5 concentration that isolates Rhizoctonia spp. and has obviously superiority over using the buckweat colonization method and other treatments, in increasing the rate of isolating Rhizoctonia spp. and in reducing the pollution rate of other fungi. This method may be used in isolating Rhizoctonia spp. from soils and in studing on the quantitative change of the population of Rhizoctonia spp. in soil.

Key words: OHIZOCTONIA DISEASE, ISOLATE METHOD, REVISED BUCKWHEAT COLONIZATION METHOD, PLANTDISEASE, SOIL FUNGI