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通过对棉花黄萎病菌Verticillum dahliae kleb五个菌系的田间致病力测定和室内培养性状及形态观察,结果认为陕西泾阳、山西运城菌系致病力强;山西汾阳、新疆石河子菌系次之;新疆和田菌系最弱。病菌致病力强弱与微菌核形成的快慢、多少及黑色素相对量呈正相关,与分生孢子大小无相关性。
Through pathogenicity test and indoor culture traits and morphological observation of five strains of Verticillum dahliae kleb, the results showed that the pathogenicity of the strains was high in Jingyang, Shanxi and Yuncheng in Shanxi Province, and that in Fenyang, Shanxi and Shihezi in Xinjiang ; Xinjiang Wada strains the weakest. The virulence of pathogenic bacteria and the speed of microscopic nuclear formation, how much and the relative amount of melanin was positively correlated with the size of conidia no correlation.