What are the functions of insect nets?

The role of insect nets

1. Insect control: After the vegetable is covered with insect control net, it can basically avoid the harm of various pests such as cabbage worm, cabbage moth, cabbage moth, Calliper moth, yellow crocus beetle, ape leaf worm, aphids. According to the tests, the control effectiveness of the net on cabbage and cabbage worms, asparagus moth, bean curd borer, and American spotted fly is 94-97%, and the control effectiveness on aphids is 90%.

2. Disease prevention: Viral disease is a catastrophic disease on many vegetables, mainly caused by insects, especially aphids Transmit disease. Because the pest control net cuts off the main transmission route of pests, it greatly reduces the infection of vegetable viruses, and the prevention effect is about 80%.

3. Adjust the temperature, soil temperature and humidity: the test shows that in the hot July-August, the temperature in the morning and evening is the same as that in the open field, and the temperature in the sunny day is about 1℃ lower than that in the open field at noon. 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. The rain in the insect-proof net room can reduce the precipitation in the net room, and the evaporation in the net room can be reduced on sunny days.

4. Blocking strong light: summer light intensity is large, strong light will inhibit the vegetative growth of vegetable crops, especially leafy vegetables, and insect nets can play a certain role in shading and preventing direct light, 20-22 mesh silver gray insect nets generally shading rate of 20-25%.