Weeding composition containing propanil and tembotrions

Abstract

The invention discloses a weeding composition containing propanil and tembotrions, and relates to the field of pesticides. Phenylpropionic acid is added into a three-necked flask, a catalyst and toluene are added as a solvent, trichloromethyl carbonate is ground and added into the three-necked flask, and reduced pressure distillation is performed to obtain an intermediate A. The problem that when A pesticide liquid is attached to target plant leaves, due to the influence of physicochemical properties of the liquid medicine, the pesticide rolls off on the surfaces of the plant leaves, or is separated out through evaporation and crystallization on the target surfaces and cannot permeate into cell walls of resistant barnyard grass and resistant moleplant leaves, and therefore the pesticide effect is limited is solved. The pesticide liquid can reach the maximum coverage on target plant leaves within an extremely short time, so that the pesticide liquid can enter a plant body through morphological structures such as plant pores and skin pores, and the maximum holding capacity and the expansion diameter of the weeding composition on the leaf surfaces are increased, so that the pesticide effect is improved, and the fresh weight control effect on barnyard grass and goosegrass is achieved.

Description

technical field [0001] The invention relates to the field of pesticides, in particular to a herbicidal composition containing propanil and tembotrione. Background technique [0002] The molecular formula of propanil is C 9 h 9 Cl 2 NO, is a highly selective contact herbicide. It is safe for rice seedlings and has a strong contact effect on resistant barnyardgrass and resistant daughter. It can also control duckweed, cress, crabgrass and foxtail Such as gramineous and dicotyledonous weeds, tembotrione is a p-hydroxyphenylpyruvate dioxygenase inhibitor, by inhibiting the synthesis of p-hydroxyphenylpyruvate dioxygenase, resulting in the accumulation of tyrosine, making plastoquinone The biosynthesis of tocopherols and tocopherols is hindered, which in turn affects the biosynthesis of carotenoids, and weeds appear chlorotic, yellow and dead, tembotrione can protect crops from ultraviolet rays, has broad-spectrum, fast-acting characteristics, and is compatible with The envir...

AI Technical Summary

Problems solved by technology

[0005] (1) Phenylpropionic acid is added to a three-necked flask, catalyst is added, toluene is used as a solvent, trichloromethyl carbonate is ground into a three-necked flask, and intermediate A is obtained by vacuum distillation, and dichloromethane is added to the three-necked flask Methane is used as a solvent, eugenol, 4-dimethylaminopyridine and triethylamine are added, intermediate A is added dropwise in an ice-water bath to obtain intermediate B, intermediate B and trimethoxysilane are added to the reaction flask, and a catalyst is added to obtain The penetrant solves the problem that when the liquid medicine adheres to the target plant leaves, due to the influence of the physical and chemical properties of the liquid medicine itself, the medicine rolls off the surface of the plant leaves, or evaporates and crystallizes on the surface of the target body, and cannot penetrate into the resistant In the cell wall of barnyardgrass and resistant daughter, which limits the efficacy of the drug;

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