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１９９２－１９９４年采用中国水稻白叶枯病菌致病型研究方法，测定１０８个以江汉稻区为主的湖北水稻白叶枯病分离菌珠，在５个中国鉴别品种（ＩＲ２６、爪哇１４、南粳１５、特特普和金则３０）成株上的抗感反应，将病菌划分为Ｏ、Ⅰ，Ⅱ，Ⅲ，Ⅳ致病型。Ⅳ型菌３１个，占参试菌株的２８．７％，占采样县（市）的６１．１％，出现频率最高，分布最广，是江汉稻区流行的优势致病型，其次是Ⅲ、Ⅱ型菌。此结果与１９８９～１９９１年测定湖北省白叶枯病致病型结果基本一致，流行优势致病型仍是Ⅳ型，但致病力指数由１９８９～１９９１年的７２．３下降至５９．３，菌株毒力有所减弱。白叶枯病是江汉稻区水稻生产的潜在威胁，而目前种植的水稻品种多不抗ＩＶ型菌，所以今后在育种过程中，要多考虑转育含Ｘａ－４基因品种。在白叶枯病疫区建议种植抗性稳定的扬辐籼２号、扬稻４号、秀水６６４、威优６４等品种。
In 1992-1994, 108 strains of bacterial blight isolated from rice bacterial blight of Hubei were detected in 108 Chinese cabbage isolates (IR26, Java 14, South Japonica 15, Tetepu and Jinze 30), the pathogen was divided into O, I, II, III and IV pathogenicity. 31 type Ⅳ strains accounted for 28.7% of the tested strains, accounting for 61.1% of the sampling counties (cities), with the highest frequency and widest distribution, being the predominant pathogenic type prevailing in Jianghan rice area, followed by Ⅲ , Type Ⅱ bacteria. The result was basically the same as the pathogenicity test of bacterial blight in Hubei Province from 1989 to 1991, and the predominant pathogenicity was still type Ⅳ, but the pathogenicity index decreased from 72.3 in 1989 to 1991 to 59.3 , Strain virulence weakened. Bacterial leaf blight is a potential threat to rice production in Jianghan rice area. However, most of rice varieties currently cultivated are not resistant to type IV bacteria. Therefore, in future breeding, more varieties should be considered for transformation with Xa-4 gene. Proposed in the bacterial blight blight resistant Yang Fu Indica 2, Yangdao 4, Xiushui 664, Weiyou 64 and other varieties.