How to scientifically and rationally use pesticides and raise the level of pest and weed control? Recently, Lei Shiming, an agronomist from Changde City, Hunan Province, gave a detailed answer to this question.
Combination of biological control and chemical prevention
Biological control is the use of a creature to deal with another kind of organism. It can be roughly divided into pest control, bird control and bacteria treatment. It utilizes the interrelationships between biological species and uses one or more organisms to inhibit another or another organism, which is a method of reducing the population density of harmful organisms such as weeds and pests. "Its biggest advantage is that it does not pollute the environment. This is incomparable to pesticides and other non-biological pest control methods." Lei Shiming said that because of the long-term use of chemical pesticides, some harmful insects have already developed strong resistance to insecticides. Their natural enemies are killed in large numbers, causing pests to be very rampant, and the use of biological control of pests and diseases can greatly increase the effectiveness of prevention and control, and thus have broad space for development. In Lei Shiming's view, strengthening the combination of biological control and chemical prevention can not only give full play to the advantages of low toxicity and long-term biological control, but also make full use of the characteristics of chemical pesticides that can be fast, efficient, simple, and eliminate pests. Effective prevention and control of crop pests occurs on a large scale, achieving a very good integrated control effect.
Promote low toxicity and high efficiency of biological pesticides
With the rapid development of science and technology, the scope of biological pesticides has been continuously expanding, involving many species of animals, plants, microorganisms, and a variety of biologically related substances with pesticide functions, such as plant-derived substances, genetically modified pest-resistant crops, Bionic synthesis or modification of natural products Synthetic compounds, artificially bred pests, antagonistic organisms, pheromones, etc. "Overall, bio-pesticides are mainly selective, safe for humans and animals; they have little impact on the ecological environment; they can induce pest epidemics; they can use the advantages of agricultural and sideline products, such as production and processing." Lei Shiming said, a large number of introduction and promotion of low The toxic and highly effective biological pesticides have great practical significance for prevention and control of crop diseases, weeds and weeds, and for improving the safety of agricultural products.
Promote the professional control of crops
The prevention of crop diseases, insects, and weeds in agricultural production has a large labor intensity, a lot of labor, high technical content, and high operational risk. It is a difficult point in modern agricultural production to achieve scale, standardization, and industrialization.
In August last year, the state promulgated the Administrative Measures for the Specialized Prevention and Control of Crop Pests and Diseases. “Specialized unified defense has not only conformed to the direction of modern agricultural development, has adapted to the laws of pest control, and has become an effective way to solve farmer disease prevention and pest control, and reduce pesticide pollution. It has also increased the level of agricultural social services and reduced pesticide pollution. The goal of scientific and rational use of pesticides can be achieved, the burden on farmers can be effectively reduced, and the safety of agricultural products can be improved, said Lei Shiming. Agricultural Science and Technology News
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