Due to the widespread occurrence of tinea and the difficulty in prevention and control, fewer and fewer farmers have planted leeks in recent years, and the cultivation area of ​​leeks has been greatly reduced. The leeks planted in greenhouses can occur all year round. The damaged parts of the leeks grow thin, the leaves yellow and wilts droop, and the yellow leaves die. Carbofur (carbofuran), commonly used in production, has a good effect on cockroach control. However, it is easily left in large amounts in the leaves of amaranth, seriously affecting food safety and is now banned from use. At present, there are few kinds of low-toxicity pesticides used to control alfalfa, and most farmers use pesticides to irrigate and control alfalfa in large quantities, causing excessive leek pesticide residues, which greatly restricts the enthusiasm of farmers to plant leek and people’s enthusiasm for eating leek. With the continuous improvement of people's living standards, quality and safety of agricultural and sideline products have gradually become the mainstream consumer trends, and agriculture is also facing the transition from the chemical era to the pollution-free, green and organic era. The developed countries have taken the lead. The city's agricultural machinery appraisal station introduced ozone control technology is relatively mature, has a patent for invention, has carried out a large-scale demonstration and promotion in Shandong, in our city Beichen District, Xiqing District, Jinghai County for the ozone water irrigation control demonstration The control effect can reach 80%, and the control effect is very good. The use of ozone water to prevent pollution, no pollution, no residue, can effectively solve the bottleneck problem in the cultivation of leek in our city, increase the yield of leek and reduce the harm of pesticide residues on the human body. Increase production and efficiency: From the beginning of planting, every irrigation uses this technology, which can play a very good preventive role, can effectively replace chemical pesticides to control earthworms, reduce pesticide costs, improve the quality of leeks, increase production, and increase costs. The purpose of the effect. Technical points: The ozone control technology is the ozone generating equipment to produce ozone gas, using the characteristics of ozone dissolved in water, fully dissolved into the water through the water-air mixer, and irrigating the soil with a certain concentration of ozone water. Ozone has strong oxidative and broad-spectrum bactericidal properties, and can effectively kill earthworms, root-knot nematodes, bacteria, and viruses in the soil. Ozone also has a "half-failure" and quickly converts to oxygen in the air without contamination or residue. The technology is simple and easy to use. Applying this technology before, during and after the planting of vegetables can play a very good role in pest control, greatly reducing labor intensity and improving work efficiency. Ozone kills underground pests through three biological oxidation reactions: (1) glucose oxidase necessary for oxidative degradation of glucose in eggs; (2) direct interaction with eggs, disruption of cell wall DNA and RNA, and breakdown of proteins and lipids Sugar-like macromolecule polymers destroy the growth and reproduction processes of their substances; (3) Infiltrate cell membrane tissues, and infiltrate into the cell membrane to act on outer membrane lipoproteins and internal lipopolysaccharides, causing the cells to undergo permeability distortion. Decomposition of the cell dies, and the genes, parasites, bacteriophages, mycoplasma, and mycoplasma in the body are decomposed and destroyed. Appropriate area: The facilities can be used for the prevention and control of soil-borne pests and diseases in agricultural production, mainly for the prevention and control of cockroaches, root-knot nematodes, bacteria, and viruses. Precautions: When using ozone to control cockroaches, it is absolutely impossible to use other cockroach-controlling pesticides, otherwise the redox effect of ozone will decompose the pesticides and will not achieve the effect of killing cockroaches. The requirement of the hose is more than 20 meters. The longer the better, the more fully mix the ozone and water, increase the ozone concentration in the water, and increase the control effect. When irrigating, do not let the water spread over the growing point of the seedlings. Put the water out of the water outlet on the outside of the greenhouse to prevent tail gas from damaging the seedlings. There should be no staff in the shed, and the prevention and control of ozone tail gas will cause harm to the human body.
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