Water-dispersible granule herbicide for wheat field, and preparation method of herbicide

Abstract

The invention relates to a water-dispersible granule herbicide for a wheat field. The water-dispersible granule herbicide comprises carfentrazone-ethyl and diflufenican which are absorbed on a carrier, sulfosulfuron, a mixture of ethylene-vinyl alcohol copolymer and ethylene-acrylic acid copolymer, and a dispersing agent composition, wherein the dispersing agent composition comprises lignin sulfonate, alkyl naphthalene sulfonate, a wetting agent, a diluent, citric acid and filler, and the weight of the lignin sulfonate accounts for 2-6% of the total weight of the composition. According to the water-dispersible granule herbicide, carfentrazone-ethyl is combined with diflufenican, so that the effect of the water-dispersible granule herbicide with the combination of carfentrazone-ethyl and diflufenican is higher than the expected sum of the effects of all single herbicides. Due to the synergistic effect, the application rate can be reduced, more broad-spectrum weeds and gramineous weeds can be controlled, the weed control effect is rapider and longer in action time, harmful plants can be better controlled only by applying the water-dispersible granule herbicide for once or a few times, and the application period is prolonged as much as possible. In some cases, the amount of harmful ingredients (such as nitrogen or oleic acid) and the permeation condition of the harmful ingredients in the soil can be also reduced due to the use of conjugate of the water-dispersible granule herbicide.

Description

technical field [0001] The invention relates to a preparation method of a water-dispersible granular herbicide for wheat soil, belonging to the technical field of plant protection compositions. Background technique [0002] The traditional herbicide spraying method will cause the loss of herbicide during the spraying process and cause environmental pollution. The herbicidally active ingredient diflufenamid is used preferably post-emergence against a variety of harmful plants in cereal crops such as wheat and barley. However, the effect of diflufenamide against harmful plants in such cereal crops is not always satisfactory. The active ingredient is combined with one or more other active ingredients. However, in the case of combined administration of two or more active ingredients, physical and biological incompatibilities often occur, such as lack of stability of the co-formulation, decomposition of one active ingredient, or antagonistic properties of the active ingredients...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a preparation method of wheat field water dispersible granular herbicide, which overcomes the defects of limited effect of single use of pesticides in the prior art and easy occurrence of drug resistance