THERE HAS BEEN A PROBLEM SUCH THAT IF A WATER-BASED PESTICIDAL SUSPENSION CONTAINING, AS AN ACTIVE INGREDIENT, AN AGRICULTURAL CHEMICAL HAVING A HIGH AQUEOUS SOLUBILITY, PARTICULARLY AN AGRICULTURAL CHEMICAL HAVING AN AQUEOUS SOLUBILITY EXCEEDING 500 MG/L AT 20°C, IS STORED FOR A LONG PERIOD OF TIME, THE ACTIVE INGREDIENT PARTICLES TEND TO GROW AND BECOME COARSE, WHEREBY A STABILIZED SUSPENSION IS HARDLY OBTAINABLE. TO SOLVE SUCH A PROBLEM, THE PRESENT INVENTION PROVIDES A WATER-BASED PESTICIDAL SUSPENSION COMPRISING (A) AN AGRICULTURAL CHEMICAL OR ITS SALT HAVING AN AQUEOUS SOLUBILITY OF FROM 500 MG/L TO 6,000 MG/L AT 20°C, (B) A POLYCARBOXYLATE TYPE SURFACTANT, (C) A SULFONATE TYPE SURFACTANT, AND (D) WATER
