A cationic herbicide with slow soil inactivation and its preparation method and application

Abstract

This invention discloses a cationic herbicide with reduced soil passivation, using a cationic polymer solution as the solvent and the cationic herbicide as the solute. This invention combines the cationic polymer with the cationic herbicide, utilizing the cationic polymer to competitively bind to the soil, reducing the soil's adsorption of the cationic herbicide, thus slowing down the rate of soil passivation of the cationic herbicide. The cationic herbicide with reduced soil passivation effectively enhances the efficacy and duration of bipyridine herbicides, providing long-term control of weeds in the soil, thereby improving weed control efficiency. It can be used for soil-applied herbicides for weed control. When used in conjunction with a cationic herbicide-resistant direct-seeded rice crop, it allows for weed control while ensuring normal rice growth, and the herbicide can remain on the weed emergence site for a period of one to two weeks, meeting the requirements for weed control in direct-seeded rice fields.

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