How to use insect nets to control pests?

     The light reflected and refracted by the anti-insect net also has a certain repellent effect on pests. The application of this technology can greatly reduce the dependence on chemical pesticides.

      Insect control objects: After covering the insect control net, it can basically avoid the harm of various pests such as rapeseed, cabbage moth, cabbage moth, Calabash moth, Xanthopsida, ape leaf worm, aphids, and prevent the spread of virus diseases by pests. Application: vegetable production in protected areas. It is mainly used in summer and autumn for Chinese cabbage, kale, cauliflower, as well as solanum and melon vegetables. Summer and autumn vegetable seedling raising can improve seedling emergence rate, seedling formation rate and seedling quality. For example, the use of insect-proof nets to isolate aphid seedlings and mulch can effectively control mustard virus disease. Breeding strong seedlings without virus has obvious effect on increasing production. Main points of use: soil disinfection and chemical weeding before covering are important supporting measures, and bacteria and pests remaining in the soil must be killed before covering, and the insect control net should be compacting and sealed around to prevent pests from sneaking into and laying eggs. The implementation of the whole growth period coverage, insect nets can block light, but not much light, do not need to cover the day and night or sunny cover the shade, should be covered. In case of 5 to 6 strong winds, the press cable must be pulled to prevent the wind from lifting the net.

   Select the appropriate specifications, the specifications of the insect-proof net include width, aperture, wire diameter, color, etc., especially the aperture should be paid attention to. The mesh is large, and the insect prevention effect cannot be achieved; If the mesh is small, it blocks too much light and is unfavorable to crop growth. At present, the suitable mesh number is 20 ~ 32 mesh, wire diameter 0.18 mm, width 1.2 ~ 3.6 meters, white. Comprehensive supporting measures, the selection of heat-resistant, disease-resistant varieties, the use of pollution-free organic fertilizer, biological pesticides, the use of micro-spray technology, can achieve better coverage effect. Timely humidification and cooling, when the temperature is higher, the temperature in the net and the ground temperature are about 1℃ higher than that outside the net, which has a certain impact on vegetable production. Therefore, in the high temperature season from July to August, the number of water supplies can be increased to maintain the humidity in the network to increase humidity and cool down.