Aqueous suspension herbicidal composition

Abstract

The object is to prepare an aqueous suspension-type herbicide composition which can avoid the decomposition of a herbicidal sulfonylurea compound in water and can also retain a stable suspension state, without the need of using any complicated step. An aqueous suspension-type herbicide composition comprising: (1) at least one herbicidal sulfonylurea compound selected from the group consisting of 1-[3-[(4,6-dimethoxypyrimidin- 2-ylcarbamoyl)sulfamoyl]-2-pyridyl]-2-fluoropropyl methoxyacetate, N-[(4,6-dimethoxypyrimidin-2- yl)aminocarbonyl]-2-(2-fluoro-1-hydroxypropyl)-3- pyridinesulfonamide and salts thereof; (2) an inorganic salt; (3) at least one sulfonate salt selected from the group consisting of an arylsulfonate, an alkylarylsulfonate and formalin condensates thereof; and (4) water.

Description

Technical field [0001] The present invention relates to an aqueous suspension herbicidal composition that suppresses decomposition of a herbicidal sulfonylurea compound or its salt in water and maintains stable suspension. Background technique [0002] To date, various herbicides have been developed and used for the purpose of protecting crops in agricultural lands or controlling weeds in non-agricultural lands. Application forms of these herbicides include powders, granules, and other solid preparations that are directly dispersed, wettable powders and wettable granules that are diluted in water and then dispersed during use, and other forms of application. A liquid suspension preparation in which active ingredients and surfactants are suspended in water, vegetable oil, etc., are diluted with water and then dispersed during use. [0003] Among them, when handling preparations in which solid substances are directly dispersed or solid preparations are diluted in water and us...

AI Technical Summary

Problems solved by technology

However, a sulfonylurea compound or a salt thereof compounded as an active ingredient of a herbicide usually has a property of being easily decomposed during storage.

Due to the decomposition of the sulfonylurea compound or its salt, the concentration of the active ingredient in the preparation decreases, and the expected herbicidal effect cannot be exerted when applied, or the internal pressure of the storage container of the suspension is sometimes caused by the gas generated by the decomposition. Increased during storage

This phenomenon sometimes causes various troubles such as the suspension spraying out when opening the seal, and the contents contaminating the operator or polluting the surrounding environment.