重寄生菌葡酒锈生座孢(Tuberculina vinosa)和白蜡锈生座孢(T.fraxinis)的寄生专化性

 用葡酒锈生座孢(Tuberculina vinosa)的孢子悬浮液,在贴梗海棠、木瓜、苹果和垂丝海棠锈病发生期,喷雾接种于叶面锈菌性子器处,7-12 d出现重寄生现象。表明葡酒锈生座孢除能在自然条件下寄生梨锈病菌外,在人为接种条件下,其寄主范围包括贴梗海棠锈病菌、木瓜锈病菌(Gymnosporangium asiaticum)、苹果锈病菌和垂丝海棠锈病菌(G.yamadai)。用葡酒锈生座孢和白蜡锈生座孢(T.fraxinis)在梨锈病菌和大叶白蜡锈病菌(Aecidium fraxinibungeanae)上交互接种,结果表明,两者不能交互寄生。研究T.vinosa和T.fraxinis的寄生专化性,对2种重寄生菌的应用及锈生座孢属(Tuberculina)种的鉴定具有意义。

Study on specialization of parasitism of hyperparasites (Tuberculina vinosa, T.fraxinis)

The spermagonia of pear rust,Chaenomeles speciosa rust, Chaenomeles sinensis rust, apple rust and Malus halliana rust on the leaves were inoculated by spraying with spore suspension of Tuberculina vinosa and hyperparasitism occurred within 7-12 days of post-inoculation. The experiment results showed, besides pear rust, the T. vinosa can infect C. speciosa rust, C. sinensis rust (G. asiaticum), apple rust and M. halliana rust (G. yamadai). Using cross inoculation with the spore suspension of T. vinosa and T. fraxinis on the spermagonia of pear rust and ash rust, they could not parasitiz the rusts crossly. The specialization of parasitism of the hyperparasites is important for practical application and identification of Tuberculina spp.