Composition for preventing and eliminating malignancy rank grass in cornfield

Abstract

The invention discloses a combination used for preventing and removing cornfield noxious weed. The combination is characterized in that: the combination comprises active ingredient composition A and composition B, wherein the composition A is R-2-[4-(5-chloro-3 fluoro-2-oxylpyridine)- phenoxy]-propiolic acid; and the composition B is one of or more than one of 2-[4-methoxyl-6-methyl-1, 3, 5-triazine-2-methyl amido methyl amido sulfonyl] methyl benzoate, thifensulfuron methyl and bensulfuron methyl. The combination provided by the invention has the advantages of wide weed control spectrum, high activity against noxious weed, safety, low toxicity and low residue for crops, safety for following rotation crops, resistance to adverse environments such as low temperature and drought, long working life and convenient use, etc. Meanwhile, the weed control effect of the combination is better than the control effect when the compound A or the compound B is used independently, and the application dose of each active substance is reduced; moreover, the combination is used for just one time and can control the damages caused by various weeds during the entire growing period of wheat, thereby having ideal economic benefit and ecological benefit.

Description

technical field [0001] The invention belongs to a herbicide, in particular to a composition for controlling weeds in wheat fields. Background technique [0002] There are more than 200 types of weeds in wheat fields, including gramineous weeds such as oats and wild oats, as well as broad-leaved weeds such as Artemisia sativa, chickweed, and shepherd's purse. Due to the long-term use of the same or the same type of herbicide, the population of weeds in the wheat field has developed serious resistance, the weed phase of the weeds has changed, and some secondary weeds have risen to become the main weeds, such as hard grass, weed grass, and pig's weed Weeds, Popona, etc., have a large number, wide distribution, serious damage, and are difficult to control. They have become vicious weeds in wheat fields. [0003] At present, there are many kinds of herbicides in wheat field, among which the most representative herbicides are fenoxaprop-ethyl, isoproturon and chlorotoluron for th...

AI Technical Summary

Problems solved by technology

However, it is ineffective against weeds such as field bindweed, thorns, and other weeds, and has poor effect on pig worms, thorns, and Polygonum, etc.

It stays in the soil for a long time, and the dosage is large, which will easily cause phytotoxicity to the next crop rice, and the safety is not good

[0007] 2M and 4C are selective hormone-type herbicides, which mainly control broad-leaved weeds in wheat fields, but their herbicidal spectrum is narrow, and their control effect on major weeds such as shepherd's purse, chiclet grass, and pig's weed is poor, and their safety is not good

[0012] The above herbicides are used as a single agent, and there are great limitations in herbicidal spectrum, control effect, safety and cost.

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