Why do anti insect nets need to be installed?

1. Anti-insect net can effectively prevent insects. After covering the insect-proof net, it can basically avoid various pests such as cabbage insects, cabbage moths, aphids and so on. Agricultural products covered with insect nets can effectively avoid the harm of various insects such as cabbage worm, cabbage moth, Calabash moth, Calabash beetle, ape leaf worm, aphids and so on. According to the tests, the control effectiveness of the insect proof net on cabbage worms, asparagus moth, bean curd borer, and American spotted fly is 94-97%, and the control effectiveness on aphids is 90%.

2. Insect proof net can prevent disease. The spread of viruses can have disastrous consequences for greenhouse farming, especially for aphids. However, after the installation of pest control net in the greenhouse, the transmission path of pests is cut off, which greatly reduces the incidence of viral diseases, and the prevention effect is about 80%.

3. Anti aphid nets can adjust the 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 that in the open field, and the noon is about 1℃ lower than in the open field on sunny days. In early spring from March to April, the temperature in the insect-proof net covered shed is 1-2℃ higher than that in the open field, and the ground temperature of 5 cm is 0.5-1℃ higher than that in the open field, which can effectively prevent frost. In addition, the insect-proof net can prevent part of the rain from falling into the shed, reduce the field humidity, reduce the incidence, and reduce the amount of water evaporation in the greenhouse on sunny days.

4. Anti-pest netting has shading effect. Summer light intensity is large, strong light will inhibit the vegetative growth, especially leafy vegetables, and insect nets can play a certain role in shading, 20-22 mesh silver gray insect nets generally shading rate of 20-25%.