本文首次报道了落叶松褐锈病的重寄生菌,经鉴定为锈寄生菌〔Sphaerellopsis filum(Bi(?).-Bern.exFr.)Sutton〕,寄生在褐锈病菌的冬孢子堆和夏孢子堆上,落叶松褐锈病菌是寄主新记录。在人工培养基上,锈寄生菌生长最适温度是20～25℃,培育至20天时,供试7种培养基中有6种产生了子实体,以1号和2号培养基为佳,25℃下7～10天即可形成分生孢子,12～17天可见溢出淡黄色至黄褐色孢子角。 This paper reports for the first time that the parasite spores of Larch rust are identified as sphaerellopsis filum (Bi (?) .-Bern.exFr.) Sutton, parasitic on the teliospores and the summer spores of the brown rust On the larch rust brown rust host new record. On artificial medium, the optimum temperature for the growth of rust was 25 ~ 25 ℃. When cultured to 20 days, 6 of the 7 kinds of medium showed fruiting bodies. The medium No. 1 and 2 was the best, Conidiospores can be formed at 7-10 days at 25 ° C, and pale yellow to brown sporelets are visible over 12-17 days.