宁夏水稻白叶枯病菌系研究初报

Preliminary Report of Study on Bacterial Strains of Rice Bacterial Blight in Ningxia

致病力测定结果表明，菌株９５－１除对抗病力最强的水稻品种宁粳１３号无致病力外，对其余８个水稻品种致病力都很强，可做为宁夏地区的代表菌株，用于水稻白叶枯病田间抗性鉴定。宁夏水稻白叶枯病菌主要为中等偏弱的菌系，不存在致病力最强的Ａ菌群菌系，因此，初步分析认为，如果水稻品种相对稳定。

The results of pathogenicity identification show that the strain 95-1 had strong pathogenicity to 8 rice varieties except Ninggen No13 which has strongest resistance to disease.So it can be used as a typical strain in Ningxia to identify the resistance of rice to bacterial blight in the fields.The bacteria of rice bacterial blight in Ningxia are mainly middle and weak strains and there are no strains of A flora which has strongest pathogenicity.So we tentatively think that if the rice varieties are relatively stable there will be no serious incidence of rice bacterial blight in Ningxia.