Whether the insect net is covered well in the shed also has an impact on the insect pest prevention. If the good wine is not covered by the net, insects can take advantage of it. Directly cover the insect net on the shed frame, press it tightly with soil or bricks around, fasten it with film line on the net, and leave the front door uncovered.
The small arch frame is made of bamboo or steel bars, inserted on the field border, covered with insect proof net, and then watered directly on the net until harvest, and the net is not uncovered. The full closed cover is adopted and the horizontal scaffold is selected to cover, so as to give some space for vegetables to grow.
It is hoped that the friends who grow vegetables and fruits can cover up according to the above methods to better avoid insects from entering the insect net and reduce the threat of diseases and pests on vegetables.
When farmers grow vegetables, what is the most annoying thing? Insects. They will eat the fruits and vegetables you have planted hard, which makes the output value plummet. So many farmers choose to spray pesticides. But the products sprayed with pesticides will do harm to people's health, which makes many farmers fall into a dilemma. However, it's not a problem with the insect net.
According to the experiment, the effect of insect control net has four aspects: insect control: the effect of insect control net on cabbage cabbage, Plutella xylostella, cowpea pod borer, Liriomyza Americana is 94-97%, and the effect on aphid is 90%. Disease control: virus disease is a disastrous disease on many kinds of vegetables. Because the insect control net cut off the main transmission way of pests, the infection of vegetable virus was greatly reduced, and the effective rate was about 80%.
Adjust the temperature, soil temperature and humidity: the experiment shows that: in the hot July August, in the 25 mesh white insect control net, the temperature in the morning and evening is the same as that in the open field, while in the sunny day, the temperature at noon is about 1 ℃ lower than that in the open field. From March to April in early spring, the air temperature in the shelter covered by insect net is 1-2 ℃ higher than that in the open ground, and the ground temperature of 5cm is 0.5-1 ℃ higher than that in the open ground, which can effectively avoid frost. In case of rain, the precipitation in the net chamber can be reduced and the evaporation in the net chamber can be reduced in sunny days.