The present invention relates to microcapsules comprising a core, wherein the core comprises cinmethylin, and a polyurea shell, wherein the shell comprises a polyaddition product of diphenylmethane diisocyanate or an oligomer thereof and at least one amine having at least two primary amino groups； to a composition comprising such microcapsules； to a method for preparing such microcapsules or such a composition； to a composition obtainable by said preparation method； and to the use of such microcapsules or compositions for controlling undesired vegetation.
