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Insect screen netting

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  1. Insect prevention: Agricultural Insect Net After the vegetable is covered with an insect net, it can basically avoid various pests such as cabbage caterpillar, diamondback moth, cabbage armyworm, Spodoptera litura, yellow beetle, ape leaf insect, aphids and so on. According to experiments, the insect-proof net has a control effect of 94-97% against cabbage caterpillars, diamondback moth, cowpea pod borer, and Liriomyza sativae, and 90% against aphids.

  2. Disease prevention: Viral diseases are catastrophic diseases on a variety of vegetables, mainly caused by insects, especially aphids

  Spread the disease. Because the insect-proof net cuts off the main way of transmitting the virus, it greatly reduces the infection of vegetable viruses, and the control effect is about 80%.

  3. Regulate air temperature, soil temperature and humidity:  Experiments show that in the hot July-August, in the 25-mesh white insect net, the temperature in the morning and evening is the same as that in the open field, while the midday on a sunny day is about 1℃ lower than that in the open field. In early spring from March to April, the insect-proof net-covered shed is 1-2°C higher than the open field temperature, and the ground temperature of 5 cm is 0.5-1°C higher than the open field, which can effectively prevent frost. The insect-proof net room can reduce the precipitation in the net room in case of rain, and can reduce the evaporation in the net room on sunny days.

  4. Shading strong light: strong light intensity in summer, strong light will inhibit the nutrient growth of vegetable crops, especially leafy vegetables, and the insect-proof net can play a role in shading and preventing direct glare, 20-22 mesh silver gray insect-proof The net shading rate is generally 20-25%.

  Three, mesh selection

  Pay attention to the aperture when buying insect screens. For vegetable production, 20-32 mesh is suitable, and the width is 1 to 1.8 meters.

  Fourth, the use of anti-insect nets

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