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依据柯赫氏法则鉴定了由内蒙古和陕西北部采集的标样,确认沙打旺黄萎病病原菌为大丽轮枝孢(Verticillium dahliae.)营养体亲和群VCG2B,对22种豆科牧草和饲料植物的温室接种测定表明该菌对沙打旺、红豆草、鹰嘴豆、胡枝子、绛三叶、毛苕子、鹰嘴紫云英、救荒野豌豆和大英野豌豆有很强的致病性,对豌豆、扁豆和草木樨状黄芪致病性弱。红三叶、黄花草木樨、白花草木樨、花苜蓿、中生苜蓿、黄花苜蓿和紫花苜蓿无明显表观症状,仅维管束变色,由变色部位能再分离出接种菌。小冠花和百脉根为非寄主植物。
According to Koch ’s law, the standard samples collected from Inner Mongolia and northern Shaanxi were identified, and the pathogen of Verticillium dahliae Verticillium wilt was identified as vegetative affinity group VCG2B of Verticillium dahliae. Greenhouse inoculation assay of forage plants showed that the bacterium had strong pathogenicity to sandwiches, sainfoin, chickpea, Lespedeza obliquus, dark clover, hairy millet, Ophiopogon japonicus, wilderness pea and populus euphratica , On peas, lentils and herbs Astragalus Astragalus pathogenic weak. There was no obvious apparent symptom of red clover, yellow flower mulberry, white flower mulberry, alfalfa, peanut alfalfa, alfalfa and alfalfa only vascular bundle discoloration, and the inoculation bacteria could be separated again from the discoloration site. Corolla and Lotus japonicus are non-host plants.