A compound herbicide containing cyhalofop-methyl, fluroxypyr and bispyribac and its application

Abstract

The invention discloses a compound herbicide containing cyhalofop-butyl, fluroxypyr and bispyribac-sodium and application of the compound herbicide. The principle active ingredients of the compound herbicide are cyhalofop-butyl, fluroxypyr and bispyribac-sodium in the mass ratio of (5-25):(10-20):(10-20), and the content of the three ingredients in the compound herbicide is 35-50%. The compound herbicide further comprises a dispersant, a wetting agent, a solvent, a thickener, a defoamer and an antifreezing agent, and thus can be prepared into a suspension. The compound herbicide has a remarkable effect in application in rice field weeding after seedling, in particular in application in prevention and weeding of various gramineous weeds and broadleaf weeds in the rice field. Compared with a binary compound preparation or other ternary compound preparations, the compound herbicide containing cyhalofop-butyl, fluroxypyr and bispyribac-sodium has the advantages of weed resistance delaying, weeding spectrum expanding, both gramineous weed and broadleaf weed eliminating, long period of preserving heat, and reliable safety on rice and after-reap crops on the premise of improvement of pesticide effect.

Description

technical field [0001] The invention relates to a composite herbicide and its application, in particular to a composite herbicide with cyhalofop-ethyl, fluroxyfen and bispyribac as main active ingredients and its application. Background technique [0002] Cyhalofop-butyl, molecular formula: C 20 h 20 FNO 4 , chemical name: (R)-2-[4-(5-chloro-3-fluoro-2-pyridyloxy)phenoxy]propargyl propanoate [0003] Structural formula: [0004] [0005] Cyhalofop-ethyl is the only chemical substance in the aryloxyphenoxypropionic acid herbicides with high safety to rice. Whether it is transplanted rice or direct-seeded rice, cyhalofop-methyl has a high degree of safety to rice. Cyhalofop-methyl can be rapidly degraded into a diacid state inactive to acetyl-CoA carboxylase in rice. It is safe for subsequent crops because it degrades rapidly in soil and typical paddy water. But the effect of cyhalofop on weeds is different. It, like other chemical substances of aryloxyphenoxypropion...

AI Technical Summary

Problems solved by technology

[0012] At present, herbicides in rice fields are limited by the safety of crops, and the herbicide spectrum of existing herbicides is also limited. The use of a herbicide alone cannot completely and effectively control the occurrence of weeds in rice fields. Therefore, a compound herbicide is prepared It has become an urgent need for rice cultivation to completely and effectively control weeds in rice fields

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