The present invention relates to a composition comprising an active and a graft copolymer obtainable by free-radical polymerization of a monomer mixture comprising N-vinyllactam, vinyl ester, and an alcohol alkoxylate. It further relates to a method for preparing said composition by mixing the pesticide and the graft copolymer, and to a method for controlling phytopathogenic fungi and/or undesired plant growth and/or undesired attack by insects or mites and/or for regulating the growth of plants.
