Rot disease mainly damages the trunk and main branches, and it can also harm collaterals and branchlets. In severe cases, it can also invade the fruits. Diagnosis of Symptoms The main symptoms of the disease are characterized by decay of the cortex at the victim's site, distiller's smell in the rot's cortex, and black spots on the surface of later stages of the lesion, and yellow filaments on dark spots under humid conditions. On the branches, two types of lesions can be formed: ulcer type and branch type. The victim of the fruit is mostly caused by the extension of the fruit branch to the fruit. [Occurrence characteristics] Rot disease is a kind of higher fungal disease. The pathogens mainly overwinter in field strains and diseased bodies. The wintering germs produce a large number of diseased spores (yellow filaments), which spread through wind and rain and infect the wounds, especially wounds with dead or debilitating tissue. Such as cutting, sawing, insect injury, frostbite, sunburn and poorly healed wounds. After the bacteria infestation, when the tree vigor is strong, it is in a latent condition, the main field of the disease on the disease-free branches is all the skin layer, the dry saw, the various healing wounds, the frozen buds, and the insect injury and frostbite. Branches, including angles with dead or debilitating tissue. When the tree's disease resistance decreases, the latent pathogen begins to spread its hazards and form lesions. Spring is the high incidence of rot disease. During this period, the lesions expand rapidly, the diseased tissue is soft, the lesions are typical, and the damage is serious. The severity of rot disease is mainly affected by six factors: tree vigor, falling layer, wounds, latent infection, xylem bacteria, and tree water content. ã€Prevention and Treatment Methods】 Zhuangshu disease prevention focuses on the eradication of pathogenic bacteria (skin scraping and pharmacological eradication). It combines timely treatment of lesions, reduction and protection of wounds, and restoration of tree vigor. Severe skin scraping is usually performed from May to July. The skin layer, rough skin, subcutaneous dry spots, and moist necrotic spots, dry spots around the lesions, subcutaneous necrotic spots in the angle between the tree branches, and necrotic tissue around the various wounds Such as scraping, scraping to the trunk "a piece of yellow, green piece" to the degree, and then the scraped bark tissue buried deep or destroyed. Note that do not apply medicine after shaving. The agent removes the body of the bacterium after defoliation and before germination. Eradication of rot bacteria is a good agent 30% of the dragon light Fulian (ketazol. carbendazim) 400 to 600 times suspension liquid, 60% of Tong Jia (copper and calcium. Carbendazim) WP 300 to 400 times liquid Wait. The commonly used treatment methods for the timely treatment of lesions are mainly scraping, cutting, and mud washing. After curettage and excision, the lesion surface should be coated with drugs to protect the wound and to eradicate or kill residual pathogens. The better pharmaceutical agents are Derma or Sweetener. The key to the treatment of mud packs is "mud sticks and packs must be strict." Important note Do not scrape too much when scraping the skin to avoid tree death. When treating lesions, it should be done as soon as possible. After the lesions are treated, bridges or feet are bridged in time to promote the restoration of tree vigor. ZHANGJIAGANG DINSHENGLIN TRADING CO.,LTD , https://www.dslhouse.com