1. It can effectively prevent insects After the agricultural products are covered with insect prevention nets, they can effectively avoid the harm of many pests, such as cabbage caterpillar, diamondback moth, cabbage armyworm, spodoptera litura, striped flea beetle, ape leaf insect, aphid, etc. Insect prevention net shall be installed in summer to prevent tobacco whitefly, aphid and other virus carrying pests from entering the shed, so as to avoid the occurrence of virus diseases in large areas of vegetables in the shed. 2. Adjust the temperature, humidity and soil temperature in the shed In the spring and autumn, the white insect proof net is used to cover, which can achieve a good thermal insulation effect and effectively reduce the impact of frost. From April to April in early spring, the air temperature in the shed covered with insect proof net is 1-2 ℃ higher than that in the open ground, and the ground temperature in 5cm is 0.5-1 ℃ higher than that in the open ground, which can effectively prevent frost. In hot seasons, the greenhouse is covered with a white
insect net. The test shows that in hot July August, the temperature in the morning and evening of the 25 mesh white insect net is the same as that in the open field, while in sunny days, the temperature at noon is about 1 ℃ lower than that in the open field. In addition, the
insect proof net can prevent some rainwater from falling into the shed, reduce the field humidity, reduce the incidence of disease, and reduce the water evaporation in the greenhouse in sunny days.