How to prevent and cure yellowskin soot disease?

How to prevent and cure yellowskin soot disease? Please introduce that wampee soot is a common disease, which is common in wampee producing areas in China, which affects plant photosynthesis and reduces yield. Affect economic development. Symptoms the disease occurs on leaves, and some shoots and fruits are also damaged. In the early stage of the disease, small mildew spots will occur on the surface of leaves and branches, usually dark brown. With the development of the disease, black mold will cover the whole leaf surface, as if covered with a layer of coal soot, and the leaves will curl and wither. When the fruit is damaged, the fruit surface is covered with a layer of black mold, which reduces the commercial value and affects photosynthesis. The occurrence regularity of the pathogen is mainly parasitic in the secretions of aphids, shell insects and whiteflies, and is transmitted by wind, rain and birds, and the incidence peak is from May to June. The disease is easy to occur in orchards with serious damage, extensive management, shade and dampness, such as aphids and shell insects. Control methods (1) strengthen orchard management, increase rotten organic fertilizer, reasonable irrigation, enhance tree potential and improve tree disease resistance. Prune scientifically, cut off diseased and dense branches, adjust ventilation and light transmission, and pay attention to orchard drainage measures. Combined with pruning, cleaning the orchard to reduce the source of disease. (2) more disease-resistant varieties should be selected according to local conditions. (3) to control aphids and shell insects, at the initial stage of the disease, spray 0.3% Mel 0.5% lime Bordeaux solution to control. Click for more wampee planting techniques click to get more fruit planting techniques