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从陕西秦巴山区及关中西洋参种植区的种子、锈腐病根及参地土壤中,分离到8种柱孢属(Cylindrocarpon)真菌和一个变种.C.destructans(Zins.)Scholtcn,C.obtusisporum(Cook＆Harkcss)Wollcnw,C.vaginae C.Booth,Y.M.Clayton＆MuUsherwood及C.victoriae(P.Hcnncn cx Wr.)Wollcnw.为引致当地西洋参锈腐病的致病菌.其中以C.destructans致病性最强,并在数量和存在的普遍性方面占优势,C.obtusisporum次之.上述4种柱孢中的后3种,及C.didymum(Harting)wallcnw.,C.heteronema(Bcrk＆Br.)Wollcnw.,C.decumbens Wollcnw.和C.destructans(Zins)Scholtcnvar.crasum Wollcnw.为国内新记录.文中对主要锈腐病原的科学名称进行了讨论。
Eight species of Cylindrocarpon fungi and one variety were isolated from the seeds of Qinba Mountain area and the seedlings of the Panax quinquefolius plantation in Shaanxi Province, Cook & Harkcss) Wollcnw, C.vaginae C. Booth, YMClayton & MuUsherwood, and C. victoriae (P.Hcnncn cx Wr.) Wollcnw are the causative pathogens that cause the rust of Panax ginseng, Dominated by C. obtusisporum, the last three of the four species mentioned above, and C. didymum (Harting) wallcnw., C. heteronema (Bcrk & Br.) Wollcnw., C .decumbens Wollcnw. and C.destructans (Zins) Scholtcnvar. crasum Wollcnw. are new records in the country. The scientific names of major rust pathogens are discussed.