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Insect-proof net is like window screen, with high tensile strength, UV resistance, heat resistance, water resistance, corrosion resistance, aging resistance and other properties, non-toxic and tasteless, the service life is generally 4-6 years, up to 10 years. It not only has the advantages of shading nets, but also overcomes the shortcomings of shading nets, and it is worthy of vigorous promotion.
It is very necessary to install insect-proof nets in greenhouses. It can play four roles: it can effectively prevent insects. After covering the insect net, it can basically avoid a variety of pests such as cabbage caterpillars, diamondback moths, and aphids.
After agricultural products are covered with insect-proof nets, it can effectively avoid the damage of various pests such as cabbage caterpillars, diamondback moths, cabbage armyworms, Spodoptera litura, flea beetles, simian leaf beetles, aphids and so on. According to the test, the insect control net is 94-97% effective against cabbage cabbage caterpillars, diamondback moths, cowpea pod borers and Liriomyza sativa, and 90% against aphids.
Can prevent disease. Virus transmission can have disastrous consequences for greenhouse cultivation, especially by aphids. However, after the installation of the insect-proof net in the greenhouse, the transmission of the pests is cut off, which greatly reduces the incidence of viral diseases, and the control effect is about 80%.
Adjust air temperature, soil temperature and humidity. In the hot season, the greenhouse is covered with a white insect-proof net. The test shows that: in the hot July-August, in the 25-mesh white insect-proof net, the temperature in the morning and evening is the same as the open field, and the temperature is about 1 ℃ lower than the open field at noon on a sunny day. From March to April in early spring, the temperature in the shed covered by the insect-proof net is 1-2°C higher than that in the open field, and the temperature in the 5 cm ground is 0.5-1°C higher than that in the open field, which can effectively prevent frost. In addition, the insect-proof net can block part of the rainwater from falling into the shed, reduce the humidity in the field, reduce the incidence of disease, and reduce the evaporation of water in the greenhouse on sunny days.