Aster albescens Rust Caused by Aecidium asterum and Its Hyperparasitic Fungus Tuberculina persicina

Aster albescens is a medicinal plant. The rust caused by Aecidium asterum is a new record in China and an importantdisease of A. albescens in Feng Tong-zhai national reservation area. The percentages of diseased plant and the diseasedleaf reach 100 and 28% respectively when the disease is serious. The disease results in leaf spot and leaf cast. Tuberculinapersicina is a natural hyperparasite of A. asterum and is firstly reported in the world. The hyperparasite attacks aecium ofA. asterum and hinderes the release of aeciospores. The symptom of the rust and the morphological characteristics of A.asterum is reported. The hyperparasitism of A. asterum and the morphological characteristics of the Tuberculina persicinaare also reported.

小舌紫菀锈病菌(Aecidium asterum)及其重寄生菌(Tuberculina persicina)研究

小舌紫菀是具有开发利用价值的药用植物。紫菀春孢锈病菌(Aecidium asterum Schw.)引起小舌紫菀(Aster albescens)锈病,为国内锈菌寄主新记录。该病在四川省蜂桶寨国家自然保护区小舌紫菀生长地造成危害,病株率为100％,病叶率28％,引起叶片枯斑、脱落。小舌紫菀锈病菌的重寄生菌(Tuberculina persicinaSacc.)是小舌紫菀锈病菌上的自然重寄生菌。该重寄生菌寄生于小舌紫菀锈菌春孢子器开口处,阻碍春孢子的释放。本文报道了小舌紫菀锈病的症状特点、病原形态特征及小舌紫菀锈病菌的重寄生现象和重寄生菌的形态特征。