【摘要】 <正> 应用反向间接血凝法诊断水稻白叶枯病,比过去所用分离培养法、噬菌体法、喷菌法和浓缩接种法迅速而又准确。但在检测过程中,有的菌株即使加大菌量也不出现血凝反应。因此怀疑到我国水稻白叶枯病菌是否有血清型存在的问题。据Addy等更多还原

【Abstract】 It was found that there are two different serotypes among the 278 isolates of Xanthormonas campestris pv. oryzae collected from different rice regions in China, as tested by the reverse indirect haemagglutination test and confirmed later by the tube agglutination and agar diffusion methods. 273 isolates belong to serotype I which is distributed widely in China, and the remaining 5 isolates belong to serotype Ⅱ Which are found in the south of The Yangtze River, especially in Guangdong, Yunnan and Jiangsu (Nanjing) provinces, as well as the Guangxi Zhuang Autonomous Region. It seems that the pathogenicity of these isolates of serotype Ⅰ inoculated by clipping method is greater than that ot serotype Ⅱ in certain rice varieties.更多还原