Covering cultivation is a new and practical environmental-friendly agricultural technology for increasing production. It can effectively control all kinds of pests, such as cabbage caterpillar, borer, diamondback moth, aphid, beet armyworm, Spodoptera exigua, Liriomyza sativa, and litura, by constructing artificial isolation barrier on the shelf, excluding pests from the net, cutting off the reproductive pathway of pests (adults). The transmission of noctuid moths and the prevention of the spread of viral diseases. It also has the functions of light transmission, moderate shading and ventilation, creates favorable conditions for crop growth, ensures that the application of chemical pesticides in vegetable fields is greatly reduced, and produces high-quality and healthy crops, thus providing a strong technical guarantee for the development and production of pollution-free green agricultural products. Insect-proof nets also have the function of resisting natural disasters such as storms, rain scouring and hail attack. Insect-proof nets are widely used for isolating pollen introduction in vegetable, rape and other original seed production. Potatoes, flowers and other cultured virulent shelters and pollution-free vegetables can also be used for tobacco seedling as insect control, disease prevention and other applications. Physical control of various crops, vegetable pests is the preferred product. Really let the vast number of consumers eat "rest assured dishes" and make contributions to China's food basket project.
Application Scope of Insect-proof Net
Leaf vegetable is a kind of vegetable that urban and rural residents like to eat in summer and autumn. Leaf vegetable has the characteristics of fast growth and short cycle, but there are many pests in open field production and serious pesticide pollution, so people dare not eat it. The pesticide pollution can be greatly reduced by covering cultivation with insect-proof net.
(2) Covering cultivation of Eggplant and melon with insect-proof net. Eggplant and melon are susceptible to viral diseases in summer and autumn. After using insect-proof net, the transmission route of aphids is cut off and the harm of viral diseases is alleviated.
(3) Nursery seedlings. June-August of each year is the season of vegetable seedling in autumn and winter. It is also a period of high humidity, heavy rain and frequent insect pests, which makes it difficult to raise seedlings. After using insect-proof net, the vegetable seedling emergence rate is high, the seedling growth rate is high, and the seedling quality is good, thus winning the initiative of vegetable production in autumn and winter.
Application effect of insect-proof net
(1) Economic benefits. Insect-proof net covering can realize vegetable production without or with less medication, thus saving medicine, labor and cost. The use of insect-proof nets increases production costs, but due to the long service life of insect-proof nets (4-6 years), long use time (5-10 months) and multiple cropping (6-8 stubbles can be produced by planting leafy vegetables), the input cost per stubble is low (the effect is more obvious in disaster years). Vegetables have good quality (no or less pesticide pollution) and good yield increase effect.
(2) Social benefits. It has greatly improved the ability of pest control and disaster resistance of vegetable in summer and autumn, and solved the problem of vegetable shortage that has plagued leaders at all levels, vegetable farmers and citizens for a long time. Its social effect is self-evident.
(3) Ecological benefits. Environmental problems have attracted more and more attention. The control effect of chemical pesticides is remarkable, but many disadvantages are exposed. The frequent use of pesticides has resulted in the pollution of soil, water and vegetables. Every year, poisoning incidents occur due to the mistaken eating of vegetables polluted by pesticides. Pests are more resistant to pesticides and more difficult to control. Plutella xylostella, Spodoptera litura and other pests have even developed to a point where there is no cure. The cultivation of pest control and mulching is to achieve the goal of pest control through physical control.