什么是防虫网？

防虫网是一种保护 屏障网 通常由编织聚乙烯制成。其目的是将害虫从有价值的商品作物、树木和花卉中驱除出去。害虫会直接损害作物的叶子和果实，引发疾病，并导致产量下降。

防虫网的设计目的是防止害虫进入，同时仍允许适当的空气流通和水通过小网眼开口。防虫网可防止昆虫、鹿和啮齿动物的侵害，并防止冰雹等恶劣天气造成的损害。

不同品牌的网眼尺寸各不相同，通常根据您想要驱除的昆虫或您所在地区常见的害虫来选择。网眼以每英寸网眼的孔数来衡量。 

防虫网特点

防虫网 通过排除害虫来保护植物。一些网还可以含有添加剂，有助于提高其防虫效果。新型网状网可以包括光学添加剂，例如用于光反射的铝条。与塑料相比，防虫网可以增加气流，同时仍能保护植物。当使用防虫网作为行覆盖物时，雨水和高架洒水器的水仍然能够到达植物。 

防止蓟马侵入网内

此外，网状结构还能阻挡任何能够突破紫外线屏障的害虫。 

• 0.78 X 0.25 毫米孔
• 光学保护
• 5 年抗紫外线
• 防治粉虱、蚜虫、果蝇和潜叶虫

这种技术可以为您的植物提供额外的防御层，而无需使用有害农药。铝条被添加到网中，以充当另一层防御。铝条可以散射光线，使害虫在穿透网之前失明。

这种反射特性还可以通过遮荫和光扩散为植物降温。添加了紫外线稳定和防尘添加剂，以防止网状物降解。高品质聚乙烯塑料温室覆盖物中也添加了相同的添加剂。

在温室中饲养有益昆虫

防虫网还可用于将有益昆虫留在温室或拱形温室内。一些昆虫的侵扰，如红蜘蛛和蚜虫，可以通过故意将昆虫捕食者放在您的生长空间内来控制。瓢虫和草蛉幼虫都非常适合控制软体昆虫的侵扰。然而，如果栖息地不理想，这两种可爱又有益的捕食者的成年形态都会飞走。 

Lining any ventilation in your hoop house with insect netting will prevent the adults from flying away and keep them feeding and laying eggs where you need them. Many of the adult forms of beneficial insects require access to pollen and nectar in order to breed. If you want them to produce additional generations within your greenhouse you will need to provide this forage.

Plant Protection for Hoop Houses and Greenhouses

Insect netting can be installed in a greenhouse using a spring and lock channel system to provide a mesh screen with a neat edge at any openings such as vents, doors, and sidewalls. It can also be used to create screen doors for additional ventilation. Covering vents with netting allows your plants to get the increased airflow they need while still being protected from pests. 

Install the netting on the inside of the structure, from the baseboards to the hipboards  as part of a vented sidewall for effective barrier blocks. When installed on the sidewalls, the crank will roll up the plastic to allow air flow ventilation while the screen of the mesh remains to exclude insects for plant protection. Sidewall insect netting is available in multiple lengths to fit your greenhouse size. 

防虫网

Protecting Row Crops with Mesh Netting

Insects weaken and damage market crops. Adding mesh insect netting into your operation's pest management program can help lower or even eliminate the need for chemical insecticides for plant protection. This means increased production levels for your farm and more perfect produce for your customers. 

Netting is laid out over rows and anchored with sand bags or rocks while avoiding any gaps for insects to penetrate. While the netting is light enough to be applied directly on top of crops, row cover support hoops made with a hoop bender can be added for better results. 

When should insect netting be installed?

Insect netting should be installed as early in the season as possible. This maximizes the protection while limiting the possibility of accidentally trapping insect pests in with your valuable crops. 

In many cases the netting is applied as soon as the crops have sprouted or immediately after transplanting. In this way they are protected during the important vegetative growth phase and the netting can be removed once the plants begin to flower. Removing the netting as flower production begins allows for proper pollination of crops and increases the likelihood of beneficial insects arriving before pests do. 

Using Insect Netting for Seed Production

Insect netting can also be used to contain pollinators and beneficial insects within a row. This is helpful for those growing for seed production as cross-pollination is less likely. In order for this to work properly it is best to create hoops that provide flying room over the crops you wish to pollinate and introduce pollinators to the covered row. 

Alternatively you can cover all rows of related species except the one you wish to save seed from for a week and then switch the coverage to the row you will be saving. This helps ensure that saved seeds are less likely to be cross pollinated while you are waiting for seed heads to develop.  

USING HOOPS TO INSTALL INSECT NETTING

Row cover support hoops help to keep the insect netting secure and snug on the rows. The added structure helps during the season as you are continuously removing and replacing the netting during harvest and regular weeding. They act as a guide for the netting while protecting the plants against netting snags and plant damage.

Small hoops can be made out of fiberglass or a heavy-gauge wire. They are designed to stick into the dirt on either side of the row, in an arch shape. The hoops provide structure for the netting to rest, preventing damage as the netting and the plants have a buffer. For larger scale plant protection hoops can be made from ½ inch or ¾ inch EMT tubing using one of our hoop benders. Row covers and insect netting can then be secured using our snap on clamps. Take care to bring the netting completely to the ground and anchor at the bottom with rocks, mulch or sand bags to prevent pests from sneaking in the gaps.

Cover your plants against insect damage

Using row covers like 防虫网 或者 frost blankets will help reduce plant diseases that are spread by insects as well as ensure blemish free vegetables and flowers. Applying covers at the right stage of growth will give your crops the best protection you can offer. These covers are easy to apply and can be folded away and stored during the off season for years of use. Properly used row covers make an excellent addition to your farms IPM (Integrated Pest Management) strategy. For more information on using covers on the farm read the Ultimate Guide to Ground Covers on the Farm.