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棉花黄萎病是我国棉花上的主要病害之一,在新疆各产棉区均有发生。近年,北疆棉区棉黄萎病扩展较迅速,在石河子垦区重病田发病率达80％以上。我们于1985和1986年棉黄萎病发生高峰期对石河子垦区一三四、一四三、一四五、一四八和一四九等团场棉山的调查表明,一四五和一四九团除有普通型棉黄萎病病株外,还有枯死型病株,其枯死症状与棉花枯萎病枯死株症状极为相似,经室内分离鉴定,这种枯死株是棉花黄蒌病菌的一个毒力很强的新菌系为害所致。
Verticillium wilt is one of the main diseases on cotton in our country, and all the cotton producing areas in Xinjiang have occurred. In recent years, cotton stripe disease in northern Xinjiang has expanded rapidly, and the incidence of severe diseases in Shihezi reclamation area has reached more than 80%. In the peak period of cotton verticillium wilt in 1985 and 1986, we conducted a survey on Yushan’s fields of 134, 144, 145, 148 and 1949 in the Shihezi reclamation area. Nine groups in addition to the ordinary type of cotton wilt disease strains, there are dead type of diseased plants, the symptoms of withered and withered cotton withered wilt disease is very similar to the symptoms, the indoor separation identified this dead plant is a Pseudoperonospora Virulent new strains caused by bacteria.