How to choose insect net？

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1. In the selection of insect-proof nets for greenhouses, the mesh number, color and width of the gauze should be considered.

If the number of meshes is too small and the mesh is too large, it will not be able to achieve the proper insect-proof effect; and if the number is too large and the mesh is too small, although it can prevent insects, poor ventilation will lead to high temperature and too much shading, which is not conducive to crops grow.

For example, many pests begin to move to the shed in autumn, especially some moth and butterfly pests. Due to the large size of these pests, vegetable farmers can use insect-proof nets with relatively small meshes, such as 30-60 mesh insect-proof nets.

However, if there are many weeds and whiteflies outside the shed, it is necessary to prevent whiteflies from entering through the holes of the insect-proof net according to the smaller size of the whitefly. It is recommended that vegetable farmers use denser insect-proof nets, such as 40-60 mesh.

For example, the most critical thing in the prevention and control of tomato yellow leaf curl virus (TY) is to select qualified insect-proof nylon gauze. Under normal circumstances, 40 meshes of nylon gauze for preventing whitefly is enough. Too dense ventilation is not good, and it is difficult to cool down in the shed at night after planting. However, the gauze mesh produced in the current gauze market is rectangular, the narrow side of the 40-mesh gauze can reach more than 30 mesh, and the wide side is often only more than 20 mesh, which cannot meet the requirements of blocking Bemisia tabaci. Therefore, only 50-60 mesh gauzes can be used to block Bemisia tabaci.

2. When selecting the insect-proof net, pay attention to check whether the insect-proof net is complete

Some vegetable growers have reported that many of the newly purchased insect-proof nets have holes, so they are reminded to unfold the insect-proof nets when purchasing to check whether there are holes in the insect-proof nets.

Vivi
joe@dagongnets.com