There are many types of insect protection nets, such as vegetable insect protection net, greenhouse insect protection net, fruit tree insect protection net, etc. Because of its simple use, easy operation, and obvious effect, it is deeply favored by everyone. But don't be sloppy when applying, pay attention to the following points:
(1) It must be covered throughout the reproductive period
Only full reproductive period coverage. Do not allow pest invasion, to effectively prevent pests. Generally, vegetables with a short growth period are covered, and the net must be covered after the base fertilizer is applied. The organic fertilizer can be used only after it is fully decomposed. After the shed is covered with the inspected protection net, water is poured directly on the net, and the net is not uncovered until harvesting.
(2) Select the appropriate specifications
The specifications of the insect protection net mainly include aperture, wire diameter, color, width, and so on. Especially the aperture, the mesh is too small, the mesh is too large, and the good insect-proof effect cannot be achieved; the mesh is too large and the mesh is small, although the insect-proof increases the cost of the insect protection net, and also reduces the light transmittance and air permeability of the greenhouse. . At present, the recommended mesh in production is generally 24-30 mesh, the wire diameter is 0.14-0.18 mm, the width is 10-15 meters, and it is white. If you want to strengthen the shading effect of the insert protection net, you can choose the black insert protection net. The silver-gray inspect protection net has a good aphid avoidance effect.
(3) Soil disinfection and chemical weeding before mulching
It is an important supporting measure for mulching cultivation of insect protection net. It must kill the pests in the soil and cut off their transmission routes. The insect protection net is tightly compacted with earth pressure around it and is fastened and pressed firmly with the lamination line.
(4) Choose heat-resistant varieties
Insect protection net is generally used for delayed cultivation of summer vegetables, cabbage cultivation, and early cultivation of autumn vegetables. During this period, the temperature is relatively high, and some insect protection nets will increase the ground temperature and temperature, so heat-resistant varieties should be selected.
(5) Pay attention to preventing rain and waterlogging
Insect protection net covering cultivation is generally in the rainy season, so deep trenches and high furrows should be used, and the trenches should be matched, which can drain and irrigate to prevent rain and waterlogging.
(6) Use with insecticidal lamps
Should use the yellow board to attract aphids, frequency-vibration insecticidal lamps and other supporting pest control technology in the production period is long, such as the production of cowpea, tomato, and other vegetables, when using the cover technology of insect protection net, should use the yellow board to attract aphid, frequency Vibrating insecticidal lamps and other technologies.
(7) Pay attention to closing the door
Large and medium-sized sheds and greenhouses must be entered through the door for agricultural operations. An insect protection net must be installed, and the door must be closed immediately after entering and leaving.
(8) Proper use and storage
Check the damage of the insect protection net at any time, and plug the loopholes and gaps in time. In case of strong winds, you need to pull up the pressure network cable to prevent the wind from opening the net. After the insect protection net is used in the field, it should be collected in time, washed, dried, rolled, and stored to prolong its service life and reduce the cost of use.