Research Institute of Forest Ecology, Environment and Conservation of the Chinese Academy of Forestry So led by Dr. Zhang Xingyao, the 948 project team of the State Forestry Administration introduced the trunk microinjection on the basis of years of research on the physiological and pathological conditions of the trees, the development and development of pests and diseases, and control technologies. Methods and related devices, agents, and methods of use. Trunk micro-injection method is a method in which a small amount of medicament sealed in a container is directly injected into the tree body through a small hole in the base of the trunk to prevent and control pests, diseases, and other physiological diseases and regulate plant growth and development, etc. It is an efficient and selective drug application technology. After injection, the agent quickly spreads throughout the branches, leaves, and roots of trees as the sap flows within a few hours. Injection holes quickly heal. Conventional chemical pesticide spraying has many drawbacks in preventing and controlling plant diseases and insect pests, including causing damage to plants, animals, beneficial insects, and humans near the target plant; about 93% of pesticides are lost due to evaporation, dropping, and drifting, and microinjection 100% of the pesticides enter the plants, only acting as feeding plants or harmful organisms inside the plants; spraying in rain can not be carried out; injections can still be used in adverse weather conditions; and even in strong winds, the effect is better because the wind accelerates transpiration. In order to speed up the absorption, the tree body can be injected with suitable pesticides for a period of up to 2 years, and the longest spraying method can only last for 4 weeks. The existing spray equipment is limited by the design and use cost, and the lift is limited. For tall trees The pest control is difficult to effectively spray the liquid onto the foliage, and the use of micro-syringes for prevention and control, no matter how tall trees do not have this problem. Based on these facts, the large number of advantages of microinjection shows an attractive prospect. Over the past three years since the project was implemented, related products and application technologies for tree microinjection have been effectively introduced. Focusing on national conditions and focusing on the core issues of digestion and absorption, in order to reduce costs, one is to reuse the syringe product, and the other is to use domestic alternatives for injection. Through joint efforts with enterprises, the project team solved a series of problems such as the localization of injection equipment, repetitive use, and localization of injections. The use of self-made syringes in the country to carry out the application of technology research and promotion of demonstration of important diseases and insect pests in China as a goal, and achieved significant benefits. The industrialization needs of the project results are extensive, including the prevention and control of pests and diseases in cities, residential areas, scenic spots and ponds, prevention and control of diseases and insect pests in trees in water-scarce mountainous regions, pest control of tall trees, borers, vascular diseases, nematodes, and knots. Insect pest control, wax shell protection shell with sucking pest control, conservation and rejuvenation of ancient and famous trees, and fruit trees, economic trees, nutrient efficient supply, increase production, increase income, control early fruit, late maturity and so on.
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