近几年通过对果园的病害情况调查,发现我州果树根部病害主要有:白纹羽病、紫纹羽病、根朽病、根癌病、根腐病、白绢病等。一、白纹羽病和紫纹羽病1.症状与发生规律①白纹羽病是由子囊菌引起的病害,开始发病时细根腐烂,以后扩展到侧根和主根,根表皮呈褐色、水渍状病斑,外表覆有白色羽毛状菌丝层,而且 In recent years through the orchard of the disease situation survey found that the root causes of fruit trees in our state are: white pattern feather disease, purple pattern feather disease, root rot disease, root disease, root rot disease, Sclerotium. First, the white pattern feather disease and purple pattern feather disease 1. Symptoms and the occurrence of ① white pattern feather disease is caused by Ascomycetes disease, the beginning of the onset of fine root rot, later extended to the lateral roots and root, the root epidermis brown, water Stain-like lesions, the appearance covered with white feathery mycelium, but also