| 摘要 |
PROBLEM TO BE SOLVED: To provide an agrochemical preparation having high suspension stability, excellent in re-suspending properties, inhibiting the generation of crop injury, decreasing the outflow of crop injury from a paddy field manifesting a prolonged remanence by compounding specific ingredients and a specific treatment. SOLUTION: The subject controlled releasing agrochemical preparation of large particle size aqueous suspension is obtained by carrying out the addition of two or more kinds of surfactants having different molecular weight and 0.1 to 30wt.% of one or more kinds of inorganic salts (e.g. an alkaline metal sulfate) in a specific order to an aqueous suspension of particle containing 0.1 to 65wt.% of one or more kinds of active agrochemical (e.g. 2',3'-dichloroethoxymethoxybenzanilide) and suspending treatment on the agrochemical active ingredients particles. In this time the covering layer containing the surfactants and the inorganic salts is formed on the surface of the active agrochemical ingredient particle and preferably the complex suspension particle has 6 to 1000μm of average particle size. The preferred surfactants used are a polymer surfactant having 1800 to 700,000 of molecular weight and one or more kinds of a low molecular weight surfactant having 100 to 1,100 of molecular weight.
|
