Method for supporting the preservation of the insect population, having the following steps of: determining the lethal effect of a product unit on an insect population, determining a difference in the insect population on the basis of the effect of a particular quantity of product units, determining the actual insect population in a predetermined area, determining a desired insect population in the predetermined area, which desired insect population is derived from the actual insect population in the predetermined area and the difference in the insect population, and creating a basis of life for the desired insect population in the predetermined area by adapting the biological nature of the predetermined area.