Peach gum disease is a fungal disease. Commonly found in peach, apricot, plum, cherry and other stone fruit trees, especially peach is the most serious, and some areas also occur on citrus. Mainly for the main stem and the main branches of the lychee, small branches and fruits can also be harmed. So, what is the cause of peach gum disease? Is there any prevention method? Etiology: Regarding the cause of gum flow in peach trees, according to domestic and foreign research, the following reasons can promote the flow of peach trees: 1. Harm due to parasitic fungi and bacteria. Such as dry rot, rot disease, anthrax, scab, bacterial perforation and fungal perforation, these diseases or parasitic branches, or endanger the leaves, so that the disease grows weak and reduces resistance. 2, pests. In particular, the wounds caused by dry pests are susceptible to gum disease. 3, wounds caused by mechanical damage as well as freezing damage, daily burns and so on. Excessive pruning and severe pruning during the growing period. 4, poor scion and the use of non-affinity rootstocks. 5, the soil is not too sticky, poor drainage, improper irrigation, excessive water area and so on. Control method Prevention and treatment of gum disease should adopt a combination of comprehensive prevention and treatment and drug prevention and control methods. 1. Strengthen the management of peach gardens and the conservation management of fruit trees to enhance the tree potential. Add organic matter to the mature agricultural fertilizer. Fertilizers should be combined with nitrogen, phosphorus and potassium to improve the physical and chemical properties of the soil. Pay attention to drainage in low-lying water. Acid or alkali soil should be properly applied with lime or superphosphate to improve the soil. Salt and alkali should pay attention to salt discharge, reasonable pruning, reduce branch wounds, and avoid continuous cropping in Taoyuan. Appropriate spraying of trace elements such as rare earths to cultivate robust trees, so that fruit trees can increase the resistance to flow gum. 2. Strengthen tree protection and control stems and diseases. Prevention of pests and diseases, early prevention and control of pests on peach trees such as scale insects, reduction of peach aphid, peach tumor, cockroach, cockroach, beetle and other branches of pests. The trunks are painted white in winter and spring to prevent freezing damage and daily burns. Work carefully and try to avoid mechanical damage. 3. Pharmacy protection and prevention: Before the early spring germination, the diseased tissue will be scraped off, and the wound will be coated with 45% crystal sulphur mixture 30 times liquid or Baume 5 degree stone sulphur mixture, and then coated with white lead oil or coal tar. For drug control, 50% thiophanate-methyl ultra-wet WP 1000 times solution or 50% carbendazim WP 800 times solution, 50% carbendazim WP 1500 times solution or 50% Pythium WP can be used. Powder 2000 times liquid, better control effect. Double Arm Electric Medical Pendant
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