The invention relates to compositions containing a) one or more pesticides, b) one or more copolymers obtained by the copolymerization of i) glycerol, ii) at least one dicarboxylic acid, and iii) at least one monocarboxylic acid, c) one or more amphoteric surface-active substances, and d) water. The compositions are particularly suitable for controlling and/or combating weeds, fungal diseases, or insect infestation.