A granulated agrichemical containing an agrichemical active component, an -starch (pregelatinized starch) and bentonite, wherein the agrichemical active component has a water solubility at 20℃ of less than 700 mg/L, and an octanol-water distribution coefficient at 20℃ within a range from 1.4 to 3.5, and the amount of the bentonite is within a range from 20 to 800 parts by weight per 100 parts by weight of the pregelatinized starch is resistant to water elution of the agrichemical active component, and therefore the effect of the agrichemical active component can be maintained over a long period.本發明為關於一種農藥粒劑,係含有農藥有效成分、預糊化澱粉(pregelatinized starch,α化澱粉)、及膨土,上述農藥有效成分在20℃對水之溶解度小於700mg/L,且在20℃之辛醇/水分配係數為1.4~3.5之範圍內,相對於100重量份預糊化澱粉,膨土含量為20~800重量份;此種農藥粒劑能夠抑制農藥有效成分在水中之溶出,能夠長時間持續農藥有效成分之效果。
