近 ３ 年，从北京、山西、内蒙、新疆和云南等地的辣椒和番茄病株上分离到 １９ 个菌株，经致病性测定和细菌学鉴定，确定这 １９ 个菌株为甘蓝黑腐黄单胞菌疮痂致病变种（Ｘａｎｔｈｏｍ ｏｎａｓ ｃａｍｐ ｅｓｔｒｉｓｐｖ． ｖｅｓｉｃａｔｏｒｉａ（Ｄｏｉｄｇｅ） Ｄｙｅ，１９７８）。供试１９ 个菌株在国内首次采用国际标准鉴别寄主进行了生理小种鉴定。其中，３ 个菌株为番茄小种１（ＸｃｖＴ ｒａｃｅ１），仅存在于北京地区，其它１６ 个菌株均属于辣椒－番茄小种 ３（ＸｃｖＰＴ ｒａｃｅ３），分布广，为我国优势小种。 In the recent 3 years, 19 strains of pepper and tomato were isolated from Beijing, Shanxi, Inner Mongolia, Xinjiang and Yunnan. The pathogenicity and bacteriological identification of these 19 strains were confirmed as cabbage black rot yellow Xanthom onas camp estrispv. Vesicatoria (Doidge) Dye, 1978). Nineteen strains were tested for the first time in China using the international standard identification of host identification of physiological races. Among them, three strains were XcvT race 1, which existed only in Beijing. The other 16 strains belonged to XcvPT race 3, which were widely distributed and were the dominant race in China.