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１９９６～１９９７年，从贵州省１８个县（市）采集分离小麦白粉菌有性和无性世代菌株１０１个，分别接种在９个鉴别品种上，共鉴定出２６个小种，其中出现频率最高、分布最广的是３１５号小种，其次是３１１、１、７、１５和３７７号小种。低毒力（０～７）、中毒力（１０～７７）和高毒力（１００～７７７）三类小种群的出现频率分别为２５．７％、１３．９％和６０．４％。供试菌株对９个鉴别品种的毒性频率依次为１００％、３８．６％、６０．４％、７０．３％、１１．９％、１０．９％、５０．４％、４９．５％和１１．９％。鉴定结果还表明，我省小麦白粉菌生理小种的组成和分布具有明显的地区特点。
From 1996 to 1997, 101 sexual and asexual isolates from powdery mildew of wheat were collected from 18 counties of Guizhou Province, and were inoculated on 9 differential cultivars respectively. A total of 26 races were identified, of which the highest frequency appeared, The most widely distributed is race 315, followed by races 311, 1, 15, and 377. The frequency of occurrence of three small populations of low virulence (0 ~ 7), virulence (10 ~ 77) and high virulence (100 ~ 777) were 25.7%, 13.9% and 60.4%, respectively. The frequency of toxicity of the tested strains to nine varieties was 100%, 38.6%, 60.4%, 70.3%, 11.9%, 10.9%, 50.4%, 49.5% And 11.9%. Identification results also show that the province wheat powdery mildew physiological races composition and distribution has obvious regional characteristics.