Abstract: A novel suspension type water medium agrochemical formulation comprising adjuvants selected from a copolymer dispersant comprising a copolymer of acrylic acid, hydrophobic monomer, alkylacrylate of a monoalkyl polyethylene glycol, and optionally strong acid derivatives of (meth)acrylic acid; non-ionic graft copolymer of acrylic ester and oxyalkylene; and having hydrophobic solid agrochemical active dispersed in aid water medium. A concentrate is also provided suitable for forming the formulation. The combination of copolymers provide dispersancy for the hydrophobic solid agrochemical active in the water medium of the suspension concentrate. There is also provided the use of said copolymers as dispersants for hydrophobic solid agrochemical active in agrochemical formulations, and a method of treating vegetation to control pests by applying the formulation or diluted concentrate form of the formulation to vegetation or the immediate environment.