After the five high-toxic organophosphorus varieties were delisted, they created huge market space problems. According to the China Pesticide Network , the Agricultural Technology Promotion Center of the Ministry of Agriculture has put forward effective guiding opinions for this purpose. The provincial agricultural technology promotion departments have all understood the local situation and released some recommended and preferred varieties, as follows:
1. Regent, generic name fipronil, chemical name: (RS)-5-amino-1-(2,6-dichloro-4a-trifluoromethylphenyl)-4-trifluoro Methylsulfinylpyrazole-3-carbonitrile. 5% Regent Suspending Agent is a patented product registered by Bayer in Germany. Its insecticidal spectrum, scope of use and precautions when using pesticides are similar to those of chlorpyrifos, but they have a long-lasting effect and a small dosage. Advanced and in line with environmental requirements. The remarkable advantage of Ruijinte is that it can be used to control rice aphids, planthoppers, and leaf curlers. The efficacy period is as long as 15~30 days, while the chlorpyrifos is only 7~10 days. However, with the expiration of patents and the rapid development of domestic technological progress, even enterprises have illegally synthesized the original drugs, which will become the main competitors of chlorpyrifos in the future.
2. Profenofos. Chemical name: O-4-bromo-2-chlorophenyl O-ethyl S-propyl phosphorothioate. High-efficiency, low-grade, broad-spectrum organophosphate insecticide and acaricide, widely used in fruit trees, cotton, vegetables and other crops, control cotton bollworm, cotton red spider, scale insect, beet armyworm, etc., its insecticidal mechanism is similar to chlorpyrifos It is one of the early varieties of organic phosphorus produced in China, but due to market promotion and other reasons, production and sales have not been large. In recent years, with the advancement of process technology and the increase in marketing efforts, sales volume has shown an upward trend. It is expected that it will become a substitute for highly toxic varieties in the future.
3. Chloromethylphosphonium. Chemical name: O,S-dimethyl-N-(2,2,2-trichloro-1-hydroxy-ethyl) thiophosphoramide, which is an efficient alternative to methamidophos research and development at Wuhan University of Technology. The low-toxic broad-spectrum insecticide is one-tenth the toxicity of methamidophos and doubles the effect of methamidophos. It is commonly used in cotton, vegetables, rice, fruit trees and other crops. The virulence of major pests such as cotton bollworm, beet armyworm, citrus red spider, and rice leaf roller is similar to that of acephate; however, due to low production cost, there is no waste. After environmental pressure, it is expected that after the industrial production of this product, it will bring vibration to the pesticide market, and it is also a strong competitor of chlorpyrifos.
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