1.它能有效地防虫。该网覆盖后，可有效地防治菜粉蝶、小菜蛾、蚜虫等害虫。农产品覆盖防虫网可有效避免菜青虫、小菜蛾、甘蓝粘虫、斜纹夜蛾、金龟子、叶甲虫、蚜虫等害虫的危害。试验表明，该网对甘蓝毛虫、小菜蛾、豇豆螟和美洲斑潜蝇的防治效果分别为94～97%和90%
2.它可以预防疾病。病毒传播会给温室种植带来灾难性后果，尤其是蚜虫传播。而温室内安装防虫网可以切断害虫的传播途径，大大降低病毒性疾病的发生率，防治效果在80%左右。
三。调节空气温度、土壤温度和湿度。在炎热的季节，温室里覆盖着白色的防虫网。试验表明，炎热季节7～8月，在25目白色防虫网中，早晚气温与露地相同，但中午比晴天露地低1℃左右。早春3～4月，覆盖防虫网的棚内气温比露地高1～2℃，5cm地温比露地高0.5～1℃，能有效地防止霜冻。另外，防虫网能防止部分雨水落入大棚，降低田间湿度，减少病害发生，减少晴天温室内水分蒸发。
4它有阴影效果。夏季光照强度大，强光会抑制蔬菜尤其是叶类蔬菜的生长。防虫网能起到一定的遮光作用。20-22目银灰色防虫网遮光率20-25%
It can prevent insects effectively.The net can effectively control Pieris rapae,Plutella xylostella,aphids and other pests.Agricultural products covered with insect proof net can effectively avoid the harm of Pieris rapae,Plutella xylostella,cabbage armyworm,Spodoptera litura,scarab,leaf beetle,aphid and other pests.The results showed that the control effects of the net on cabbage caterpillar,Plutella xylostella,cowpea borer and Liriomyza sativae were 94-97%and 90%respectively
It can prevent diseases.Virus transmission will bring disastrous consequences to greenhouse planting,especially aphids.However,the installation of insect prevention net in the greenhouse can cut off the transmission path of pests,greatly reduce the incidence of viral diseases,and the control effect is about 80%.
3.Humidity and temperature of soil.In the hot season,the greenhouse is covered with white insect net.The results showed that in the hot season from July to August,the temperature in the morning and evening was the same as that in the open field,but it was about 1℃lower at noon than that in the open field on sunny days.From March to April in early spring,the temperature in the shed covered with insect proof net was 1-2℃higher than that in open field,and the ground temperature of 5cm was 0.5-1℃higher than that in open field,which could effectively prevent frost.In addition,the insect proof net can prevent part of rainwater from falling into the greenhouse,reduce the field humidity,reduce the occurrence of diseases,and reduce the water evaporation in the greenhouse on sunny days.
It has a shadow effect.In summer,the light intensity is high,strong light will inhibit the growth of vegetables,especially leafy vegetables.The insect proof net can play a certain role in shading.20-22 mesh silver gray insect proof net,shading rate 20-25%
