关于我国棉花黄萎病菌“种”的鉴定,许多学者认为是大丽轮枝菌(Verticilliumdahliae)。迄今为止,尚未发现黄萎轮枝菌(V.albe-atrum)。这二种轮枝菌在世界各地广泛分布,大丽轮枝菌是引起棉花黄萎病的主要致病种。早在五十年代,我国已发现棉花黄萎病菌的不同菌株存在着致病力的差异。以后王清和、邓先明、姚耀文分别报道了山东、四川省和其它八个省(区)的棉花黄萎病菌的致病力分化情况。他们所述的强、中、弱不 About our identification of Verticillium dahliae in our country, many scholars consider it as Verticillium dahliae. To date, V. albe-atrum has not been found. These two kinds of Verticillium are widely distributed all over the world. Verticillium dahliae is the main pathogenic species causing cotton Verticillium wilt. As early as the fifties, China has found that there are differences in pathogenicity among different strains of Verticillium dahliae in cotton. Later, Wang Qinghe, Deng Xianming and Yao Yaowen separately reported the pathogenicity differentiation of Verticillium dahliae in Shandong, Sichuan and other eight provinces (districts). They are strong, medium and weak