为了明确宁夏向日葵黄萎病病原菌种类,分析病害发生规律,研究防病关键技术。采用形态分类方法对病原菌进行种的鉴定,采用一般生物学方法对病原菌重要生物学特性及致病性进行研究。病原菌种的鉴定结果表明宁夏向日葵黄萎病致病菌为大丽轮枝菌。病原菌的生物学特性研究表明:病原菌菌丝生长温度范围为10~30℃,最适生长温度为25℃,最适合在黑暗条件下生长,最适生长p H为5~6,最适生长碳氮源分别为淀粉和甘氨酸;致死温度50℃。 In order to clarify the types of pathogen of Verticillium wilt in Ningxia, analyze the law of disease occurrence and study the key technologies of disease prevention. Species identification of pathogenic bacteria was carried out by morphological classification, and the biological characteristics and pathogenicity of pathogenic bacteria were studied by general biological methods. Identification of pathogen species showed that Ningxia sunflower verticillium wilt pathogens Verticillium dahliae. The study on the biological characteristics of pathogenic bacteria showed that the mycelial growth temperature of pathogen was 10-30 ℃ and the optimum temperature was 25 ℃, which was most suitable for growth under dark conditions. The optimum growth pH was 5-6, and the optimal growth carbon Nitrogen sources were starch and glycine; lethal temperature 50 ℃.