First, the symptoms

At the beginning of the disease, red and purple spots appeared on the branches, and then gradually expanded into large lesions. The center of the lesions was dark brown, the edges were reddish brown or purple brown, and slightly protruding upward. The lesions were dark brown in the late stage, and the surface was longitudinally cracked. When the whole plant died.

Second, prevention and treatment methods

(1) Cut down the branches, dead branches and rot leaves in time and burn them collectively.

(B) At the beginning of the disease, 75 percent of chlorothalonil WP can be sprayed with 600 to 700 times of liquid spray.

(3) When the disease is serious, 50% of the antibacterial 800 times solution or 50% of the carbendazim 800 to 1000 times solution can be used for spraying prevention.