Synergism weeding composition for paddy field

Abstract

The invention provides a synergistic herbicidal composition for paddy fields, which comprises three components of mesotrione, fenthiazamide and chlorpyramid-methyl, and mesotrione, fenthiazamide and chlorpyramid The weight ratio of sulfuron-methyl in the herbicidal composition is 2.5-6:20-70:1-2.5. The present invention solves the problem of resistant weeds through the ternary compounding of mesotrione, mefenacet and chlorpyramid-methyl, and expands the herbicidal spectrum against weeds at the same time. Basically solve the weeds in the paddy field, save labor, time and labor, and have a certain effect on increasing the production and income of rice. At the same time, the dosage of pesticides is reduced, the adverse effects of pesticides on the ecological environment are reduced, and the emergence of drug resistance is delayed. In addition, the herbicidal composition can be processed into a variety of time-saving and labor-saving dosage forms, and can be applied directly without spraying, which is more meaningful today when labor costs are increasing day by day.

Description

technical field [0001] The invention belongs to the technical field of pesticides, and in particular relates to a paddy field synergistic herbicide composition for resistant weeds such as Sagittarius chinensis, Commelina chinensis, Sedge, Barnyardgrass and Stephania chinensis and other refractory weeds. Background technique [0002] The use of herbicides has greatly reduced the labor intensity of farmers, but with the long-term use of conventional herbicides, weeds have also developed great resistance, and simply increasing the dosage cannot solve the problem. The amount increases the cost on the one hand, and pollutes the environment on the other hand. At present, a large number of resistant Sagittarius japonica and Commelina japonicus have appeared in the rice fields in the northeast, and a large number of weeds such as sedge, barnyardgrass, and stephenia have appeared in the rice fields in the south. The existing herbicides on the market have little control effect. The p...

AI Technical Summary

Problems solved by technology

[0012] Although mesotrione, mefenacet and chlorpyrazosulfuron-methyl are all herbicides that can be used alone, they have certain defects and limitations when used alone

In addition, although there are reports in the prior art that two or three of these three herbicides can be selected for mixed use, there is no systematic experimental study on the comprehensive effect of specific mixing ratio selection on weeding

Generally speaking, on the one hand, the existing single or mixed herbicides still have defects and limitations such as narrow herbicidal spectrum, large dosage, and poor control effect on malignant weeds; There is no technical revelation that teaches that the mixed use of the above three herbicides can completely solve the above-mentioned defects and limitations

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