Prevention and control of persimmon mad disease

Symptoms: the diseased tree sprouted late in spring, grew slowly, the veins of the leaves were black, the xylem of the branches became dark brown, and the phloem tissue was seriously expanded, resulting in clumps of branches or upright overgrowth or withered branches and scorched shoots, with less fruit, and the fruit softened early and fell off. Serious sterility or death of the whole plant. Control methods: (1) select disease-resistant varieties or use disease-resistant rootstocks for breeding. (2) healthy trees were selected as rootstocks and disease-free scions were grafted. (3) strengthen cultivation management, spray Zhuangguotiling once before and after flowering, thicken the pedicel and increase the amount of nutrition transport. Improve the disease resistance of fruit body. (4) in late autumn and early winter, the diseased branches and leaves were completely removed in the Qing garden, and the fruit trees of the whole orchard were brushed to protect the general to reduce the source of infection. The whole garden should be sprayed with germicidal drugs for sterilization and disinfection, and sprayed with new high-fat film to enhance the effect of prevention and control, so as to isolate the invasion and infection of foreign bacteria.