How to control jujube anthracnose

First, the symptoms: the infected fruit first appeared reddish-brown spots, then the disease spot gradually enlarged, surrounded by a light yellow halo ring, and finally the disease spot color became dark brown, slightly sunken but then expanded slowly, and the shape of the disease spot was diversified, such as round, oval or fusiform. The flesh inside the spot changes from green to brown, necrotic, black or dark brown. The fruit generally does not fall off, but in the later stage or when there are more disease spots, it is often easy to rot and fall off, and a few dried fruits hang on the tree. 2. Prevention and control methods 1. Agricultural control (1) combined with meticulous pruning, cutting off the jujube hanging, disease and insect branches and withered branches on the tree, combined with basic fertilizer, cleaning up the fallen jujube hanging, jujube leaves, etc., buried at the bottom of the fertilizer application pit, and deep turning in winter to remove the pathogen. (2) strengthen the comprehensive management of jujube garden and increase the application of organic fertilizer. (3) reasonable intercropping. Intercropping low-stalk crops such as peanut and sweet potato in jujube orchard can reduce the air humidity in the garden and reduce the occurrence of diseases. (4) to change the processing method of jujube and adopt the Kang drying method to prevent the disease from being promoted by the environmental conditions of high temperature and high humidity. 2. Chemical control before the disease, generally in late June, Liangguoan will be diluted according to 400 murine 600 times solution, while adding a certain amount of osmosis or strong internal absorption of low-toxic chemical agents to eliminate the source of disease on the tree; near the disease period, combined with the prevention and control of jujube rust, spray again in mid-late July In the onset period, it is usually around the middle of August, sprayed once every 10 murals in 15 days, and sprayed 3 times in a row, and the medication is generally ended in the first and middle of September.