一、尾孢菌所致病害的特点 尾孢菌(Cercospora spp)侵染寄主树木后,可形成两类病斑:一类扩展较慢,形态,大小是有一定的;另一类扩展较迅速,病斑多为不规则形。在为害落羽杉、紫荆、落霜红、悬铃木、石榴等寄主时,可显著地引起早期落叶,树木早秋呈裸露状态,失去观赏价值。而为害繖花石斑木、光叶石楠、兰桉、珊瑚木和红杉的病菌,可使病叶残留在树冠上,长达一年之久。它们不仅影响了 First, the characteristics of the disease caused by Cercospora cercospora infection (Cercospora spp) host trees, the formation of two types of lesions: a class of slower expansion, shape, size is a certain; the other is more rapid expansion , Mostly irregular spots shaped. In the victims of Taxodium distichum, Bauhinia, Fragrans red, Plaitwood, pomegranate and other host can significantly lead to early deciduous, early autumn trees were exposed state, loss of ornamental value. The damage paraspora spot wood, Photinia, Eucalyptus, coral and Sequoia pathogens, leaves the leaves remain in the crown, up to a year. They not only affect