Farmers, homeowners, and directors of recreational areas are advised on the control of the house fly and the stable fly with minimum use of insecticides. New management techniques are described, such as surveying barnyard and dumpster areas weekly so that fly-breeding sites can be identified and removed. Recommendations are made for the management of animal bedding to prevent fly breeding. Various outdoor and indoor fly traps are described in detail. A recipe is given for a fly bait called Beltsville Bait. Also included are field observations on the use of parasitoids to kill fly pupae.