First, symptoms and damage The disease occurs from time to time in the south. When the disease is heavy, it causes the branches to fall and affects the viewing. The disease mainly damages the leaves. In the early spring, the leaf margin curls downwards when the leaf is developed. The diseased leaf may grow into a pod-like shape locally or as a whole. The leaf becomes thicker, and the texture is brittle, yellow or red, and the leaves are distorted and deformed. In the early summer, the diseased department was born with grayish white powder, and when the disease was heavy, the leaves fell early. The young shoots are grayish green or yellow when victimized. The internodes are short and thick and slightly curved. The upper leaves are clustered and curled. When severe, the branches die. Second, pathogens and disease characteristics This disease is a fungal disease, caused by the malformed outer cyst [Taphrinadeformans (Berk.) Tul.]. The pathogenic bacteria pass through the winter or summer in the site of the onset of bud scales or branches; spread by wind and rain; invade from stomata and the like. Low temperatures (10°C to 16°C) and more rain are conducive to disease. In the middle and early May, the onset of the disease. Diseases above 21°C have stagnated. Third, control methods (1) reduce the source of infection: When the peach bud expansion before spraying 45% lime sulfur crystals 150 times, or 1% Bordeaux mixture to kill the source of overwintering bacteria. Continuous control of 2 to 3 years can eradicate leaf shingle disease. After defoliating, spray 2% to 3% of copper sulfate solution, the incidence of light the next spring. (2) Cultivation Techniques Prevent Diseases: Increase organic fertilizer or GA activator; drain water promptly after rain; combine pruning shears to remove sick branches and destroy them together with diseased leaves. Glass Petri Dish, Plastic Petri Dish,Petri Dish Price, Laboratory Dish Ningbo Siny Medical Technology Co., Ltd , https://www.sinymedical.com