Compound weeding composition

Abstract

The invention discloses a compound weeding composition. The compound weeding composition is prepared from three active components including cyhalofop-butyl, bispyribac-sodium and azimsulfuron, whereinthe mass ratio of the cyhalofop-butyl to the bispyribac-sodium to the azimsulfuron is (5 to 60) to (3 to 50) to (5 to 50); the sum of the mass percent of the three effective components in the composition is 1 percent to 80 percent. The compound weeding composition can be used for preventing and controlling weeds of paddy rice fields and has a remarkable spectrum spreading and synergistic effect;meanwhile, the dosage of the effective components is reduced, the safety on crops is improved and the occurrence and development of pesticide resistance of the weeds, caused by the fact that single pesticide is used, are delayed. The weeding composition disclosed by the invention is applicable to prevention and control of almost grassy weeds and broadleaf weeds in the paddy rice field and especially has a very good prevention effect on weeds including resistant barnyard grass, digitaria chrysoblephara, setaria glauca, duckweed, spirogyra, potamogeton distinctus and the like; the weeding composition has a long lasting period and is safe for paddy rice.

Description

technical field [0001] The invention belongs to the technical field of pesticides, in particular to a compound herbicidal composition. Background technique [0002] Cyhalofop-butyl (Cyhalofop-butyl) is the only aryloxyphenoxypropionic acid herbicide that is highly safe to rice and is a systemic conductive herbicide. Absorbed by the leaves and leaf sheaths of plants, conducted by phloem, accumulated in the meristem area of ​​plants, and inhibits acetyl-CoA carboxylase (ACCase). It is mainly used for the control of grass weeds in rice fields, especially effective for A. chinensis. [0003] Bispyribac-sodium, a broad-spectrum benzoic acid herbicide, is a highly active acetolactate synthase (ALS) inhibitor, which is quickly absorbed through leaves and roots after application, and is quickly transmitted to the entire plant. It prevents cell division by inhibiting the biosynthesis of essential amino acids valine and isoleucine, and inhibits the growth of plant meristems, thereby...

AI Technical Summary

Problems solved by technology

In recent years, due to the large-scale use of some herbicide varieties alone, many weeds have developed resistance

At the same time, when weeds occur, the grass phase is complex, grass weeds, broad-leaved weeds, and sedges are mixed, and the use of a single herbicide cannot solve farmland weeds, and all of them will show some defects and problems. limitation

Cyhalofop-methyl, bispyriben and rimsulfuron-methyl used alone in the process of weed control are not wide in herbicidal spectrum and high in pesticide components

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