Ecological control technology of pests

Due to the long-term use of Chemical Pesticides, some pests have developed strong resistance to insects, and many pests are very paralyzed. In addition, a large part of the used pesticides enters the environment, which seriously pollutes the water, the atmosphere and the soil, and is enriched through the food chain and enters the human body, thus endangering human health. Using the ecological control technology of pests can effectively avoid the above shortcomings. The so-called biological control of pests is the use of various inter-dependent, mutually-restrictive relationships among biological systems, and certain biological characteristics to control pests. At present, the pest biological control technologies mainly include the following aspects: 1. Agricultural measures (1) Crops, insects, and weeds are controlled by crop rotation, intercropping and mixed cropping. Rotation is to reduce the spread of soil diseases, parasitic or associated pests, grass damage, etc. through the different characteristics of different crops, and its effects are even not reached by pesticides. Intercropping and mixed cropping are used to control the disease, insects, and weeds, such as corn and soybean intercropping, by increasing the number of biological populations. Due to good light transmission and ventilation, they can reduce the risk of leaf spot, stickworm, and corn borer. It can also reduce the incidence of soybean aphids. (2) The disease, insects and weeds can be prevented or reduced by adjusting the harvesting and sowing time. All kinds of diseases, insects, and grasses have their own specific life cycle. By adjusting crops and harvesting time, disrupting insectivorous food time or staggering the season, it can effectively reduce the damage. (3) Breeding and application of resistant varieties. Using the principle of resistance to parasitic plants, through breeding techniques such as conventional breeding, cross breeding, and molecular breeding, cultivating disease-resistant pest-predominant organisms that impede the invasion or spread of pathogenic bacteria and prevent pests from spawning or feeding. Variety or strain. At present, many insect-resistant crop varieties such as insect-resistant cotton, insect-resistant rice and the like have been cultivated through genetic transformation. 2. The use of natural enemies in the pest biological control technology system and the use of natural enemies to control pests are more commonly used. Each pest generally has one or more natural enemies, which can effectively suppress the proliferation of pests. Using this ecological phenomenon, a new balance between biological populations can be established. The organisms currently used for biological control (natural enemies) can be divided into three categories: (1) Predatory creatures: These natural enemies are mainly used for the purpose of controlling pests by preying on pests. It mainly includes grasshoppers, ladybugs, insects, mosquitoes, spiders, frogs, hawksbills, and many other beneficial birds. (2) Parasitic organisms: These natural enemies are mainly controlled by parasitic pests for the purpose of control. Mainly include parasitic bees, parasitic flies and so on. For example, Trichogramma, which is currently widely used, is artificially released for release to control corn borers, etc.; and Golden wasp is used for the prevention and control of pink bollworm; a significant effect has been obtained. (3) Pathogenic microorganisms: This type of natural enemies is mainly used to control pests to achieve control. It mainly includes Bacillus thuringiensis, bacillus bacillus, lactobacillus, metarhizium, self-metastatic bacteria and certain viruses. For example, it has been found that Bacillus thuringiensis has a killing effect on over 200 agricultural and forest pests, and pests such as pine caterpillars, cabbage caterpillars, moths, tussock moths, and corn borers have been widely used.

TCP

Food Grade TCP,Food Additives TCP,Best Quality TCP

Feed Grade Dcp Co., Ltd. , http://www.nsfeedgrade.com