The fruit tree insect control net not only has the function of sunshade, but also has the function of insect control. It is a new material to prevent the field vegetable pests. The insect control net is mainly used for raising seedlings and cultivation of cabbage, cabbage, radish, cabbage, cauliflower, eggplant, fruit, melon, beans and other vegetables in summer and autumn, which can improve the emergence rate, seedling rate and seedling quality
What should we pay attention to when using fruit tree insect control net?
1. Select appropriate specifications
The specifications of insect screen mainly include aperture, wire diameter, color, width, etc. In particular, the aperture, the mesh number is too small, and the mesh is large, which can not play a good insect control effect; the mesh number is too large, and the mesh is small, although the insect control increases the cost of the insect control net, but also reduces the transparency and permeability of the shed.
At present, the recommended mesh number in production is generally 24-30 mesh, wire diameter 0.14-0.18mm, width 10-15m, white. If you need to strengthen the shading effect of insect screen, you can choose black insect screen. The silver gray insect control net can avoid aphids very well.
2. Full life coverage
Only the whole birth period is covered. Only when there is no chance for pests to invade, can pests be effectively prevented. Generally, the vegetables with short growth period shall be covered with net after sufficient base fertilizer is applied, and the organic fertilizer can only be used after fully ripening. After the shed is covered with insect control net, water it directly on the net, and do not uncover the net until harvest.
3. Selection of heat resistant varieties
Insect control net is generally used for delayed cultivation of summer vegetables, cultivation of lodging vegetables and cultivation of autumn vegetables in advance. During this period, the temperature is higher. In addition, some insect control nets will increase the ground temperature and temperature, so it is advisable to select heat resistant varieties.
Soil disinfection and chemical weeding before covering is an important supporting measure for the coverage and cultivation of insect control net. The surroundings of insect control net shall be tightly compacted by soil pressure, and tightly fastened by membrane line. We should use yellow board to lure aphid and frequency vibration lamp to control insects
In the long production period, such as cowpea, tomato and other vegetables, when using the technology of insect net covering, we should use the technology of yellow board to lure aphid, frequency vibration type insecticidal lamp and so on
4. Pay attention to the prevention of rain and waterlogging
The cultivation of insect net cover is generally in rainy season, so deep ditch and high border should be adopted, with ditch matching, which can discharge and irrigate, and prevent the damage of rain and waterlogging.
5. Proper use and storage
Check the damage of insect screen at any time, and plug the loopholes and gaps in time. In case of windy weather, it is necessary to pull the pressure wire to prevent the net from being lifted by the wind. After the use of insect control net in the field, it should be collected in time, washed, dried, rolled and stored to prolong its service life and reduce its use cost.
6. Close the door
Large and medium-sized sheds and greenhouses must enter from the door for agricultural work, install insect proof nets, and close the door immediately after entering and leaving.