1病蟲害防治：蔬菜覆蓋防蟲網(wǎng)后，可基本避免菜青蟲、小菜蛾、卷心菜粘蟲、斜紋夜蛾、金龜子、猿葉甲蟲、蚜蟲等害蟲的危害。試驗(yàn)表明，該網(wǎng)對甘藍(lán)毛蟲、小菜蛾、豇豆螟、美洲斑潛蠅的防治效果為94～97%，對蚜蟲的防治效果為90%。
2疾病預(yù)防：病毒病是許多蔬菜上的一種災(zāi)難性疾病，主要由昆蟲，尤其是蚜蟲引起
疾病的傳播。由于蚊帳切斷了病毒傳播的主要途徑，大大減少了蔬菜病毒的感染，防治效果達(dá)80%左右。
三。調(diào)節(jié)溫度、土壤溫濕度：結(jié)果表明，在炎熱的7-8月，在25目白色防蟲網(wǎng)中，早晚與露地溫度相同，而在中午晴天，則比露地低1℃左右。早春3～4月，覆蓋防蟲網(wǎng)的棚內(nèi)氣溫比露地高1～2℃，5cm地溫比露地高0.5～1℃，能有效地防止霜凍。結(jié)果表明，雨天可減少網(wǎng)室降水量，晴天可減少網(wǎng)室蒸發(fā)量。
4強(qiáng)光：夏季光照強(qiáng)度大，強(qiáng)光會抑制蔬菜作物尤其是葉菜類蔬菜的營養(yǎng)生長。該防蟲網(wǎng)能起到一定的遮光和防止陽光直射的作用。20-22目銀灰色防蟲網(wǎng)遮光率為20-25%。
1.Pest control:after the vegetables are covered with insect proof net,the damage of Pieris rapae,diamondback moth,cabbage armyworm,Spodoptera litura,scarab beetle,ape leaf beetle,aphid and other pests can be basically avoided.According to the test,the control effect of the net on cabbage caterpillar,diamondback moth,cowpea pod borer and Liriomyza sativae was 94-97%,and 90%against aphids.
2.Disease prevention:virus disease is a catastrophic disease on many vegetables,mainly by insects,especially aphids
Transmission of disease.Because the insect net cut off the main way of virus transmission,the infection of vegetable virus was greatly reduced,and the control effect was about 80%.
3.Adjust the temperature,soil temperature and humidity:the results show that in the hot July August,the temperature in the morning and evening is the same as that in the open field in the 25 mesh white insect proof net,while in the sunny day at noon,it is about 1℃lower than that in the open field.From March to April in early spring,the air 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.The results show that the precipitation in the net chamber can be reduced in case of rain,and the evaporation in the net room can be reduced in sunny days.
4.Strong light:in summer,the light intensity is high,and the strong light will inhibit the vegetative growth of vegetable crops,especially leafy vegetables.The insect proof net can play a certain role in shading and preventing direct sunlight.The shading rate of 20-22 mesh silver gray insect proof net is 20-25%.
