防虫网的形状像纱窗。具有较高的抗拉强度、抗紫外线、耐热、耐水、耐腐蚀、耐老化。无毒无味。其使用寿命一般为4-6年，最长可达10年。它既有遮阳网的优点，又克服了遮阳网的缺点，值得推广。
1、蚊帐的作用
1防冻
果树幼果期和果实成熟期处于低温季节，容易引起冷害或冻害。结果表明，防虫网的应用不仅提高了网内温度和湿度，而且防止了果实表面冻害，对防止枇杷幼果期冻害和柑桔成熟期冻害有非常明显的效果。
2病虫害防治
果园、苗圃覆盖防虫网后，阻断蚜虫、木虱、夜蛾、果蝇等果树害虫的发生和传播途径，达到防治这些害虫的目的，特别是控制蚜虫、木虱等媒介昆虫的危害，对防治柑桔黄龙病、衰退病等病害的蔓延，对控制火龙果、火龙果等蓝莓和果蝇具有重要作用。
三。防落果
果实成熟期在夏季，雨水充沛。如采用防虫网，可减少果实成熟期暴雨造成的落果，特别是在雨年火龙果、蓝莓、杨梅等水果处于雨季时。
4改善温度和光线
覆盖防虫网可以降低光照强度，调节土壤温度和空气温湿度，减少降水、水分蒸发和叶片蒸腾。结果表明，空气相对湿度高于对照，雨天湿度最高，但差异最小，增幅最小。当网室相对湿度增加时，柑橘类果树的蒸腾作用会降低。降水和相对湿度对果实生长发育的影响较大。
果树防虫网覆盖方法：
（1）棚型：先搭棚，用槽口固定脚手架，用防虫网覆盖脚手架，用水泥夯实地面，棚前留门。
（2）覆盖方式：直接用防虫网覆盖果树，用竹竿支撑。它可以同时覆盖一棵树或多棵树。该方法操作简单，费用低，但会给现场操作和管理带来不便。主要适用于短期、季节性防霜冻、防暴雨、防鸟害等，成熟期可防霜冻、果蝇、鸟害。
The insect proof net is shaped like a window screen.It has high tensile strength,ultraviolet resistance,heat resistance,water resistance,corrosion resistance and aging resistance.It is non-toxic and tasteless.Its service life is generally 4-6 years,up to 10 years.It not only has the advantages of the sunshade net,but also overcomes the shortcomings of the sunshade net,so it is worth popularizing.
1、The function of insect net
1.Frost prevention
The young fruit stage and fruit maturity stage of fruit trees are in the low temperature season,which is easy to cause chilling injury or freezing injury.The results showed that the application of insect proof net not only improved the temperature and humidity in the net,but also prevented the frost injury on the fruit surface by using the insect proof net,which had a very obvious effect on the prevention of frost damage in the young fruit stage of loquat and the cold injury in the mature stage of citrus fruit.
2.Pest control
After the orchard and nursery are covered with insect proof nets,the occurrence and transmission routes of aphids,Psylla,Spodoptera,fruit flies and other fruit pests are blocked,so as to achieve the purpose of controlling these pests,especially to control the damage of aphids,wood lice and other vector insects,to prevent and control the spread of Citrus Huanglongbing disease,recession disease and other diseases,and to control pitaya,pitaya,etc Blueberry and Drosophila play an important role.
3.Fruit drop prevention
The fruit ripening period is in the summer with heavy rain.If the insect proof net is used,it can reduce the fruit drop caused by rainstorm during the fruit ripening period,especially in the rainy years when pitaya,blueberry and bayberry fruit are in the rainy year.
4.Improve temperature and light
Covering insect proof net can reduce light intensity,adjust soil temperature and air temperature and humidity,reduce precipitation,water evaporation and transpiration of leaves.The results showed that the relative humidity of air was higher than that of the control,and the humidity in rainy days was the highest,but the difference was the smallest,and the increase rate was the lowest.When the relative humidity in the net room was increased,the transpiration of fruit trees like citrus leaves could be reduced.Water affected fruit quality development through precipitation and air relative humidity,which was more conducive to fruit growth and development,and the fruit quality was better.
Methods of covering fruit trees with insect proof net:
(1)Shed type:first build the shed,fasten the scaffolds with slots,cover the scaffolds with insect proof net,compact the ground with cement,and leave a door on the front of the shed.
(2)Cover type:directly cover the fruit trees with insect prevention net and support with bamboo pole.It can cover single tree or multiple trees at the same time.It is easy to operate and reduce expenses,but it will cause inconvenience in field operation and management.It is mainly suitable for short-term,seasonal frost prevention,rainstorm prevention,bird damage prevention,etc.if it is in mature stage,it can prevent frost,fruit fly and bird damage.
