The invention relates to compositions containing a) one or more water-soluble pesticides, b) one or more quarternary ammonium compounds of the formula (I), R1R2R3N30—(CmH2mO)pH X− (I), in which R1 is a linear or branched alkyl group with 6 to 10 carbon atoms, R2 and R3 can be the same or different and are each independently of each other an alkyl group with 1 to 3 carbon atoms, m is 2 or 3, p is a number from 1 to 5, and X is chlorine, and c) water.
