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以国内外有代表性的菌系为对照，３ 个不同棉种的４ 个品种为鉴别寄主研究了棉花黄萎病菌安阳菌系致病类型的变异。结果表明，安阳菌系的致病力类型有明显变异，其ＡＶＳ菌株的致病力明显强于强致病力类型的陕西泾阳菌系和我国江苏落叶型菌系ＶＤ－ ８，且略高于美国强致病力落叶型菌系Ｔ－ ９，属强致病力类型；病原菌室内培养性状也有变异，ＡＶＳ菌株是近年出现的新类型，其在病株中分离比例呈上升趋势，ＡＶＨ菌株在病株中的分离比例则呈下降趋势；黄萎病的田间症状有不同类型，早期落叶型为近年出现的新类型，具有发病早、重、快、损失重等特点；早期落叶型棉花黄萎病的致病菌与ＡＶＳ菌株关系密切。
The representative domestic strains of bacteria as a control, three different varieties of cotton four different host for the identification of cotton Verticillium dahliae Anyang strains of pathogenic types of variation. The results showed that there was a significant variation in the pathogenicity of Anyang strains. The virulence of strains of AVS was significantly stronger than that of strains of Jingyang of Shaanxi province and VD-8 of China, and slightly higher than In the United States, the virulent leaf-decaying strain T-9 is a strong virulent type. The pathogenicity of the pathogen also varies in laboratory. The AVS strain is a new type emerged in recent years. The percentage of isolates in the diseased plants showed a decreasing trend. There were different types of symptoms in the field of Verticillium wilt. Early deciduous foliage was a new type emerged in recent years, with the characteristics of early onset, heavy, fast and heavy loss. Pathogenic bacteria and AVS strains are closely related.