An improved insecticidal particulate composition is a free-flowing composition comprising 1-50% by weight of methomyl impregnated in 10-98% by weight of a water-insoluble polymer which is soluble in an organic solvent, has an inherent viscosity of at least 0.2 and is capable of releasing methomyl at a rate such that said composition exhibits an undiminished initial activity, an enhanced residual activity and reduced phytotoxic damage to cotton plants relative to solid methomyl.
The composition may be made by precipitating the components from solution by comingiing with a non-solvent under conditions of high shear.
一种改进的杀虫颗粒组合物是一种自由流动的组合物,它含有 1-50%(按重量计)的
灭多威,浸渍在 10-98%(按重量计)的
水不溶性聚合物中,该聚合物可溶于有机溶剂,固有粘度至少为 0.2,并能以一定的速度释放
灭多威,与固体
灭多威相比,所述组合物的初始活性不减弱,残留活性增强,对棉花植物的植物毒性损害减少。 该组合物可通过在高剪切力条件下与非溶剂混合,从溶液中析出各组分而制成。