In recent years,vegetable growers in greenhouses have found that diseases and insect pests are becoming more and more serious,and more and more medicines are used,but it is very difficult to prevent and control them.A large amount of human and financial resources are wasted,and the economic benefits of vegetables can not be guaranteed,which leads to the loss of money seriously.
近年来，大棚菜农发现病虫害日趋严重，用药越来越多，但防治难度很大。浪费了大量的人力、财力，蔬菜的经济效益得不到保障，造成了严重的经济损失。
So,is there any effective method to control the occurrence of diseases and insect pests!However,many vegetable growers don't want to invest or use it incorrectly,which will lead to a large area of vegetables infected with diseases and insect pests.
那么，有没有什么有效的方法来控制病虫害的发生呢！然而，许多菜农不愿投资或错误使用，这将导致蔬菜大面积病虫害的发生。
Insect net
蚊帐
1.The function of insect proof net:1
1防虫网的功能：1
①The results showed that,after covered with insect proof net,the pests of Pieris rapae,diamondback moth,cabbage armyworm,Spodoptera litura,scarab beetle,ape leaf beetle,aphid and other pests can be basically avoided,and the pest control effect can reach more than 90%.
①结果表明，采用防虫网覆盖后，可基本防治菜青虫、小菜蛾、甘蓝粘虫、斜纹夜蛾、金龟子、猿叶甲虫、蚜虫等害虫，防治效果可达90%以上。
Insect net
蚊帐
②Virus disease prevention is a catastrophic disease on many vegetables,mainly transmitted by insects,especially aphids.The installation of insect net can cut off the transmission route of insect pests,thus greatly reducing the infection of vegetable virus,and the control effect is about 85%.
②病毒病防治是许多蔬菜上的一种灾难性病害，主要由昆虫尤其是蚜虫传播。安装防虫网可以切断害虫的传播途径，从而大大减少蔬菜病毒的感染，防治效果在85%左右。
2.Pay attention to the following when purchasing insect proof net:
2购买防虫网时应注意以下事项：
In vegetable production,25-40 mesh is suitable and the width is 1-1.8m.The results showed that the effect of white or silver gray net was better.The main function of insect proof net is to prevent insects.Its effect is related to the mesh number of insect proof net.The more mesh,the better the effect of insect control.However,too much mesh will affect the ventilation effect.The use of insect proof nets must pay attention to sealing,otherwise it is difficult to achieve the effect of insect control.
在蔬菜生产中，以25～40目为宜，宽度为1～1.8m，结果表明，白色或银灰色网效果较好。防虫网的主要功能是防虫。其效果与防虫网的网目数有关。网目越多，防虫效果越好。但是，过多的网眼会影响通风效果。使用防虫网一定要注意密封，否则很难达到防虫的效果。
In order to improve the effect of pest control,it is necessary to pay attention to the fact that the net has less shading,so it is not necessary to cover the net day and night or cover it before and after.It should be covered throughout the whole process,so as not to give pests the chance to invade.
为了提高病虫害防治效果，需要注意的是，网子遮光较少，所以不必昼夜覆盖，也不必前后覆盖。全程覆盖，以免给害虫带来入侵的机会。
