The studies concerned the possibility of vermicomposting organic wastes separated from kitchen wastes. Vermicomposting was conducted with the presence of the earthworm Dendrobena veneta. The occurrence of dipteran Sciaridae was reduced by application of Nomolt 150SC, Dimilin 25WP and Dar 2.5GR preparations into the substrate (in environmentally safe doses recommended by the producers). The aim of the studies was to determine the influence of these preparations on D. veneta characterististics and also on the rate of vermicomposting. The nutritional value of the vermicomposts produced was also recognized. During 3-months of vermicomposting, no influence of Nomolt 150SC and Dimilin 25WP on earthworms was found. Dar 2.5GR brought about a signif...