The present invention relates to an agrochemical composition comprising a pesticide and at least one water-soluble copolymer (P) comprising at least one monomer (A) selected from the group of (meth)acrylamide, N-methyl(meth)acrylamide, N,N'-dimethyl(meth)acrylamide and N-methylol(meth)acrylamide; at least one macromonomer (B), at least comprising a macromonomer (B1): H2C=C(R1)-R2-O-(R3O)a-(R4O)b-[(R4O)c(R5O)d]-H; and at least one anionic monoethylenically unsaturated monomer (C) comprising at least one acidic group selected from -COOH, -SO3H, PO3H2 and salts thereof. The invention further provides for the production of a spray liquor, comprising the contacting of a pesticide, the water-soluble copolymer (P), and water; and a method of controlling phytopathogenic fungi and/or unwanted plantgrowth and/or unwanted insect or mildew infestation and/or for regulation of plant growth, wherein the agrochemical composition is allowed to act on the pest, on its environment, on the useful plantto be protected from the pest, on the soil and/or on the unwanted plant and/or useful plant and/or its environment.