Post-emergence herbicide composition for paddy seedlings and herbicide made of post herbicide composition

Abstract

The invention relates to a post-emergence herbicide composition for paddy seedlings and a herbicide made of the post-emergence herbicide composition. The post-emergence herbicide composition comprises fenoxaprop-p-ethyl, metamifop and isoxadifen-ethyl, wherein the mass ratio of the fenoxaprop-p-ethyl, the metamifop and the isoxadifen-ethyl is (1-5):(1-20):(0-20). An addition agent is added to the herbicide composition, and the herbicide is prepared, wherein the addition agent is prepared from two or more than two of a surfactant, a filling, a solvent or a suspending agent. The fenoxaprop-p-ethyl and the metamifop are mixed for use, so that the activity on barnyard grass can be significantly improved, and the synergistic effect is significant; and after the fenoxaprop-p-ethyl and the metamifop are mixed for use, all main grassy weed in current rice paddies can be prevented and controlled, and a weed control spectrum can be extended. The fenoxaprop-p-ethyl has high phytotoxicity risks on a part of rice varieties, phytotoxicity appears easily, but the isoxadifen-ethyl can improve the safety of the fenoxaprop-p-ethyl to rice under the condition that the activity of the fenoxaprop-p-ethyl is not influenced.

Description

technical field [0001] The invention relates to the technical field of pesticides, in particular to a paddy field post-emergence herbicide composition and herbicide. Background technique [0002] Rice is one of the most important food crops in the world. Weeds in rice fields are serious, and the control of gramineous weeds is relatively difficult. High-efficiency, safe and selective herbicides for grass weeds in paddy fields have broad market prospects and commercial value. [0003] Methazone: Molecular formula: C 23 h 18 ClFN 2 o 4 , chemical name: (R)-2-{(4-chloro-1,3-benzoxazol-2-yloxy)phenoxy}-2′-fluoro-N-methylpropionanilide, English Name: metamifop. It is a special herbicide for paddy fields, used to control grass weeds such as barnyardgrass, crabgrass, and daughter. In recent years, the resistance of weeds such as Qianjinzi to it has gradually increased. [0004] Fenoxaprop-ethyl: Molecular formula: C 18 h 16 ClNO 5 , chemical name: ethyl (R)-2-[4(6-chloro-...

AI Technical Summary

Problems solved by technology

The safener has strong specificity, and the effect of using it on different crops is very different

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