The present invention provides a composition comprisinga) at least 1% by weight of copolymer synthesized from monomers M comprisingi) at least one ethylenically unsaturated monomer M1 containing sulfonic acid groups,ii) at least one monomer M2 selected from C1-C4 alkyl (meth)acrylates, andiii) at least one monomer M3 selected from C6-C22 alkyl (meth)acrylatesb) at least 10% by weight of organic solventc) not more than 10% by weight of waterd) at least 1% by weight of water-insoluble pesticide ande) at least 1% by weight of nonionic surfactant.Further provided is a process for preparing this composition by contacting the copolymer, the organic solvent, the water-insoluble pesticide, and the nonionic surfactant. The invention relates additionally to the agrochemical application of the composition.