The First step in House fly control is exclusion and sanitation. After these measures, we can use insecticides that come in residual forms, aerosols, fogging materials, and baiting forms. Fly traps have long been a favorite. There are many forms of fly traps, from disposable fly traps to electronic fly light traps with replaceable light bulbs and glue boards.
Getting rid of house flies usually requires a mix of indoor and outdoor treatment measures. This is especially true if you have pets that defecate in the yard, compost piles, small bodies of water close by, live near a farm or have unclean trash bins or dumpsters nearby. While eliminating all house flies on your property is not realistic, you can control the fly population to a manageable level.
Outdoor Fly Control Methods
There are 3 different methods you can utilize when controlling the current outdoor house fly population. Depending on the level of infestation you may use 1, 2 or all 3 methods together to keep the house fly population under control. For most residential house fly infestations Method 1 or 2 is sufficient.
Insecticide spray application
For a small outdoor population you can choose to spray the exterior of your structure with a residual concentrated insecticide. This method should also be used in conjunction with one of the methods below if you have a medium to high population. Dilute the insecticide with water in the hand pump sprayer as directed on the product label. Apply the diluted solution to window frames, door frames, around porch lights, on eaves, overhangs and other surfaces where you see flies resting. This application should be repeated once per month during the warm season to help stop flies from entering the structure.
Trapping house flies outdoors is a great way to control the breeding females and should be used when you have a medium to high level of infestation. Fly traps are also a good choice when using insecticides is not possible or not desired. Fly traps work by creating an area that is attractive for females to lay eggs. Once inside the trap, the flies are unable to get back out. Most Fly traps are typically placed at least 30 feet from the structure or area you are trying to protect from house flies. The traps should be hung at about eye level in a sunlit area. Be sure to read and follow the instructions of the trap you purchase as the instructions can vary slightly between traps. Check the trap twice a week and change out as needed.
Baiting for house flies is usually done when the source of the flies cannot be completely controlled such as on a farm, kennel area, near dumpsters or near composting areas. Fly baits typically have a food attractant and a pheromone attractant to entice the flies along with an insecticide to eliminate flies once the bait has been eaten. Fill the bait station as directed on the fly bait product label. The station can be mounted on fences, walls or other surfaces near dumpsters, behind restaurants or in other places where flies are a problem. The FBS Fly Bait Station has a locking lid that only allows flies to enter, protecting the bait from the elements, children and pets (Keep out of reach of livestock). The station easily mounts to all types of surfaces using zip ties, screws or liquid nails. Check the station every 1-3 days and refill as necessary to keep the fly population down.