Safety herbicide for corn field

Abstract

The invention relates to safety herbicide for a corn field. An active ingredient of the safety herbicide is prepared by mixing topramezone and one or more than one of atrazine, ametryn, amides active compound, the mass ratio of topramezone to atrazine is 0.5-8:1-30, the mass ratio of topramezone to ametryn is 0.5-8:1-30, and the mass ratio of topramezone to amides active compound is 0.5-8:1-30. The amides active compound is alachlor, pretilachlor, butachlor or metolachlor. The topramezone has remarkable synergistic effect after adding atrazine / ametryn, the herbicide has good prevention and control effect on weeds and has good preventing and removing effect on malice broad leaf weeds such as cirsium setosum, chicory, acalypha australis and dayflower. The topramezone has a wide weed control spectrum, is safe for the height of corns, and can effectively synergize after combining the atrazine and the like. After combination, use amount of atrazine alone is reduced, and safety of the corns is improved.

Description

Technical field: [0001] The invention relates to a chemical pesticide, in particular to a corn field safe herbicide. Background technique: [0002] The chemical name of fenpyrazone (Topramezone Baowei, fenpyrazone) is: [3-(4,5-dihydroxyisoxazolyl)-4-methylsulfonyl-2-methylphenyl-(5 -Hydroxy-1-methyl-1H-pyrazol-4-yl)methanone], molecular formula: C 16 h 17 N 3 o 5 S, its structural formula is: [0003] [0004] Benfentrazone is a new type of pyrazolone herbicide for post-emergence stem and leaf treatment systemic conduction, the mechanism of action is to inhibit 4-hydroxyphenylpyruvate dioxygenase (HPPD) in the biosynthesis of plastoquinone , indirectly affects the synthesis of carotenoids, and interferes with the synthesis and function of chloroplasts under light conditions, resulting in severe chlorosis, tissue necrosis, and plants usually die after 14 days of treatment. Due to the oxidative degradation of chlorophyll, the symptoms of poisoning are most obvious esp...

AI Technical Summary

Problems solved by technology

[0016] (1) The herbicide spectrum is not wide enough, and some herbicides cannot be effectively controlled. Even if the two are combined, the effect on some malignant weeds is still not enough; (2) Many weeds have developed resistance to commonly used herbicides, which greatly improves the efficacy of the herbicides. Reduced; (3) Sensitive to sweet corn, sticky corn, and Denghai series corn, which is not safe enough

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