A herbicidal composition is provided the composition comprising an aqueous suspension of microcapsules the microcapsules having a capsule wall of a porous 5 condensate polymer wherein the microcapsules contain a solution of fluroxypyr in a rosin solvent system comprising rosin and/or a rosin derivative. There is also provided a herbicidal composition comprising microcapsules the microcapsules having a capsule wall of a porous condensate polymer wherein the microcapsules contain fluroxypyr and a solvent comprising rosin and/or a rosin derivative. A method of preparing a herbicidal composition is also disclosed the method comprising the steps of providing a water immiscible phase comprising fluroxypyr and an isocyanate dissolved in a rosin solvent system comprising rosin and/or a rosin derivative； providing an aqueous phase comprising one or more surfactants； combining the water immiscible phase and the aqueous phase to form a dispersion of the water immiscible phase in the aqueous phase； adding to the resulting dispersion an amine thereby forming microcapsules of polyurea containing droplets of the water immiscible phase； and curing the microcapsules.
