近年来，水稻谷粒变色病日趋严重。采用常规方法，对成都和重庆两地区的变色谷粒病原菌进行分离、纯化及其致病性测定，获得具致病作用的镰孢霉菌（Ｆｕｓａｒｉｕｍｓｐｐ．）、交链孢霉菌（Ａｌｔｅｒｎａｒｉａｓｐ．）、色二孢霉菌（Ｄｉｐｌｏｄｉａｓｐ．）、假单孢杆菌（Ｐｓｅｕｄｏｍｏｎａｓｓｐ．）、欧文氏杆菌（Ｅｒｗｉｎｉａｓｐｐ．）等若干菌株，其中欧文氏杆菌、镰孢霉菌为优势种群，各占４５．５％，２７．３％。欧文氏杆菌侵染水稻谷粒尚属首次报道，有待进一步深入研究。 In recent years, rice grain discoloration is worsening. The routine methods were used to isolate, purify and test the pathogenicity of the discolored grains in the two regions of Chengdu and Chongqing to obtain the pathogenic Fusariumspp., Alternariasp. Pseudomonas, Pseudomonas sp., Erwiniaspp. Among them, Erwinia spp. And Fusarium spp. Were the dominant species, accounting for 45.5% and 27.3 %. Erwinia infection of rice grains is the first report, pending further study.