摘要
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。
Based on samples collected from Inner Mongolia and North Shaanxi Province, the pathogen of wilt disease of Astragalus adsurgens was identified, according to Koch's rule, as Verticillium dahliae, vegetative compatibility group VCG2B. An inoculation test on 22 leguminous species showed that the pathogen fungus had strong pathogenicity to Astragalus adsurgens, Onobrychis viciaefolia, Cicer arietinurn, Lespedeza bicolor, Trifolium incarnatum, T. repens, Vicia villosa, Astragalus cicer, Vicia sativa and V. macrocarpa; it was less pathogenic to Pisum sativum, Lablab purpureus and Astragalus melilototaicle. As for Trifolium pratense, Melilotus officinalis, M. albus, Pocockia ruthenica, Medicago media, M. falcata and M. sativa, there were no obvious symptoms, except for the discoloured xylem bundles from which the pathogen fungus could be re—isolated. Lotus corniculatus and Coronillia varia were found to be non—host species.
出处
《草业学报》
CSCD
1996年第2期18-23,共6页
Acta Prataculturae Sinica
基金
国家动植物检疫总局"八五"口岸植检课题
关键词
沙打旺
黄萎病
大丽轮枝孢
病原学
致病性
Astragalus adsurgens, Verticillium wilt, Verticillium dahliae Kleb., etiology, pathogenicity
