Insect proof net is a kind of net fabric made of polyethylene with anti-aging, anti ultraviolet and other chemical additives as the primary raw material and drawn. It has the advantages of high tensile strength, heat resistance, water resistance, corrosion resistance, aging resistance, non-toxic and tasteless, and easy disposal of waste. Conventionally, it is easy to use and keep, and the correct storage life can reach about 3-5 years.
Insect control net is a new environmental protection agricultural technology after sunshade net! After the canopy covering, the artificial barrier may be constructed to block the pests from the agricultural products, so as to achieve the purpose of insect prevention, disease prevention and vegetable preservation. In addition, the reflected and refracted light of the insect net has certain repellent effect on pests.
Insect control net has the following primary effects: useful to block pests! The agricultural products covered with insect net can effectively eliminate many kinds of pests, such as cabbage worm, diamondback moth, cabbage moth, Spodoptera litura, jumping beetle, ape Leafworm, aphid and so on.
According to the experiment, the control effect of insect control net on cabbage, Plutella xylostella, cowpea pod borer and Liriomyza sativae was 94-97%, The control effect on aphids is 90%. It can not only prevent pests from entering the greenhouse and reduce direct damage, but also reduce the time of main virus transmission, avoid the outbreak of virus. Besides white, it can also use silver, yellow and black nets to block pests, and use some special colors to avoid pests. In addition, it can also use light to drive away insects and other methods for comprehensive management.
Adjust the temperature, soil temperature and humidity. The results showed that the temperature in the morning and evening was the same as that in the open field, but it was about 1 ℃ lower than that in the open field at noon. 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.
The strong light can restrain the vegetative growth of vegetables, especially leafy vegetables, and the insect net can play a certain role in shading and preventing the strong light from direct. The general shading rate of 20-22 mesh silver grey insect net is 20-25%
The advantages of insect prevention network: it can not only effectively avoid diseases and insect disasters, but also reduce the investment in the later period; it can avoid food poisoning without using pesticides, improve the quality of vegetables, without insect holes on the appearance and pesticide pollution on the surface, which is very popular with the public. The popularization of vegetable insect control net can greatly reduce the amount and times of pesticide application, produce green vegetables without (less) pesticide pollution, and meet the development trend of the times.