桑树炭疽病是夏秋季常见的叶部和实生幼苗的主要病害,在我国广东、广西、四川、山东等省区均有发生。近年来,在江苏无锡、吴江、丹阳、南通、海安、东台等重点蚕区发生普遍,对苗木和成株桑均有不同程度的为害。而对桑苗的为害特别严重,据调查,发病严重的田块,成林桑株发病率为100%,叶发病率为30%左右,当年春季嫁接的嫁接苗,到7～8月份,每根枝条只有梢部3～5片叶可以用来养蚕, Mulberry anthrax is a common disease in summer and autumn leaves and seedlings of the main diseases in our country Guangdong, Guangxi, Sichuan, Shandong and other provinces have occurred. In recent years, Wuxi, Wujiang, Danyang, Nantong, MSC, Dongtai and other key areas of silkworm occur generally, the seedlings and adult mulberry have varying degrees of damage. The damage to the mulberry seedlings is particularly serious, according to the survey, the incidence of serious plots, the incidence of forest mulberry strain was 100%, the incidence of leaf is about 30%, then the grafted grafted spring in the spring, from July to August, each Root shoots only 3 to 5 leaves can be used to sericulture,