The invention relates to compositions for use in pest control, especially to insecticidal suspension concentrates and to spray solutions produced on the basis thereof, to methods for producing them, and to the use of said formulations for a long-term control of animal pests (arthropods) on various surfaces. The invention further relates to the use of certain polymer dispersions in pest control agents, especially their use to prolong the long-term effect of said agents when they are applied to surfaces. The invention further relates to the use of the compositions according to the invention for controlling parasites, especially ectoparasites, in animals.
