Pest control is a very important and difficult management in greenhouse management. Therefore, some farmers now cover Insect screen netting for insect control, which can basically eliminate cabbage caterpillars, diamondback moths, aphids and other pests. But few farmers know the precautions in its use.

1. Matters needing attention

Choose the right shade net: First, consider the mesh, color and width of the gauze. If the mesh is too small and the mesh is too large, it will not achieve the desired insect-proof effect; and if the mesh is too large and the mesh is too small, although it can prevent insects, the ventilation is poor, resulting in high temperature and too much shading. Conducive to crop growth; generally, 22-24 mesh insect nets should be used. Compared with summer, in spring and autumn, the temperature is lower and the light is weak, so white insect-proof nets should be used; in summer, in order to take into account the shading and cooling, black or silver-gray insect-proof nets should be used; in areas with serious aphids and virus diseases, in order to avoid For aphids and virus disease prevention, silver-gray insect-proof nets should be used.

2. Pre-coverage processing

The soil should be disinfected and chemically weeded before being covered by the Insect screen netting. The germs and pests remaining in the soil must be killed before the insect-proof net is covered, and the source of the insects must be killed. This is the key link to ensure the coverage of the insect-proof net.

The quality of coverage

The Insect screen netting should be completely closed and covered, and the soil should be compacted in the vicinity, and it should be firmly fixed with a lamination line; Insect-proof nets cover cultivation in small arched sheds, and the height of the scaffolding should be higher than the crops to prevent vegetable leaves from sticking to the insect-proof nets, so as to prevent pests from eating outside the nets or laying eggs on vegetable leaves; insect-proof nets used for closing air vents, and films, etc. There should be no gaps between the cover, so as not to leave access for pests; check and repair the holes and gaps in the plastic insect net at any time.