论文部分内容阅读
1988年秋,在北京和内蒙的大白菜上发生一种叶斑病,难以确诊何种病害,从其病叶分离到10个菌株,做了致病性测定,革兰氏染色、菌体形态、培养性状、生理生化反应,DNA的G+C含量测定及血清学反应鉴定,结果证明,这10个菌株均属菊苣假单胞菌Pseudomonas cichorii(Swingle)Stapp 1928。该病菌国内无发生记载,对大白菜危害国内外未曾有过报导,称之大白菜细菌性叶斑病。经人工喷雾接种结果表明,该病菌除危害大白菜和油菜外,还能不同程度地侵染甘蓝、菜花、番茄、青椒、芹菜、莴笋、芥菜、萝卜、黄瓜和菜豆,但不能侵染甜菜。
In the autumn of 1988, a leaf spot was found on Chinese cabbage in Beijing and Inner Mongolia. It was difficult to diagnose what kind of diseases. Ten strains were isolated from diseased leaves. Pathogenicity test, Gram stain, The results showed that these 10 strains belonged to Pseudomonas cichorii (Swingle) Stapp 1928. The bacteria did not occur in the domestic records of the dangers of Chinese cabbage have never been reported at home and abroad, called cabbage bacterial leaf spot. The artificial spray inoculation results showed that the pathogen could infect cabbage, cauliflower, tomato, green pepper, celery, lettuce, mustard, radish, cucumber and kidney bean to some extent except cabbage and rape, but could not infect beet.