A composition comprising microencapsulated clomazone is provided, the clomazone being contained within microcapsules having a microcapsule wall formed by the coacervation of a plurality of amphoteric polymer electrolytes. In particular, the microcapsules wall is formed from a cellulose derivative, for example carboxymethyl cellulose, a natural gum, for example gum arabic, and gelatin. The microcapsule wall preferably comprises a cross-linking agent, in particular a glycoluril resin. A method for encapsulating clomazone by coacervation is also provided.本發明係提供一種包括微膠囊化可滅蹤(clomazone)之組成物,該可滅蹤係包含在具有由多數個兩性聚合物電解質之凝聚作用所形成的微膠囊壁之微膠囊中。特言之,此微膠囊壁係由纖維素衍生物例如羧甲基纖維素,天然膠例如阿拉伯膠和明膠所形成。此微膠囊壁較佳地係包括一交聯劑,特言之,一甘脲樹脂(glycoluril resin)。本發明亦提供藉由凝聚作用包膠可滅蹤之方法。