As we all know, the main purpose of pesticides is to eliminate or control and regulate the growth of plants and insects. The survey shows that in the agricultural production, especially food production, the types and quantities of harmful organisms increase, the area expands, the harm is aggravated, and pesticides are used. It is also becoming more and more common and the usage is getting bigger and bigger.
How to use pesticides scientifically and rationally to improve the level of pest control? On January 5, Lei Shiming, an agronomist at the Municipal Agricultural Research Institute, gave a detailed answer to this question.
Biological control combined with chemical control Biological control is the use of one organism to deal with another organism, which can be roughly divided into pest control, bird control, and insect control. It utilizes the interrelationship between biological species to inhibit one or another species of organism by one or a class of organisms, and is a method of reducing the population density of pests such as weeds and pests. "The biggest advantage is that it does not pollute the environment, which is incomparable to non-biological methods such as pesticides." Lei Shiming said that due to the long-term use of chemical pesticides, some harmful insects have developed strong resistance. Their natural enemies have been killed in large numbers, causing pests to be very embarrassing, and the use of biological control of pests and diseases can greatly improve the control effect, and thus has a broad space for development. In his view, strengthening the combination of biological control and chemical control can not only give full play to the advantages of low-toxicity and long-term biological control, but also make full use of chemical pesticides to quickly, efficiently, easily and eliminate pests. A large area of ​​crop pests occurs, achieving a good comprehensive control effect.
Promote low-toxic and high-efficiency bio-pesticide bio-pesticide refers to the use of biological organisms (fungi, bacteria, insect viruses, genetically modified organisms, natural enemies, etc.) or their metabolites (pheromone, auxin, naphthaleneacetic acid, 2,4-D, etc.) A preparation in which agricultural pests are killed or inhibited. It is a naturally occurring or genetically modified agent that differs from conventional pesticides in its unique mode of action, low dosage and specificity of the target species.
With the rapid development of science and technology, the scope of biological pesticides has been expanding, involving many species of animals, plants, and microorganisms, as well as a variety of biologically related substances with pesticide functions, such as plant-derived substances, genetically modified anti-harmful crops, Biomimetic synthesis or modification of natural products, synthesis of compounds, antagonistic organisms of artificially propagated pests, pheromones, and the like. "In summary, biological pesticides are mainly selective, safe for humans and animals; have little impact on the ecological environment; can induce pest epidemics; can use the advantages of agricultural and sideline products production and processing." Lei Shiming told reporters that a large number of introductions and promotion The biological pesticides with high toxicity and high efficiency have great practical significance for preventing and controlling crop diseases, pests and diseases and improving the safety of agricultural products.

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