To build an effective homemade fly trap, you'll need to attract the flies to your trap. You can help significantly reduce or eliminate the fly population around your home or outbuildings by making your own fly attractant solution and using it to create homemade fly traps. The most common homemade fly traps use papers soaked in a sticky fly attractant to trap flies that land on them. Other traps also may use a liquid that simply draws flies to the trap.
Sticky fly attractant solution
Measure 250 ml (1 cup) of syrup, 50 ml (1/4 cup) of brown sugar and 50 ml (1/4 cup) of granulated sugar for your fly attractant solution.
Combine syrup and both types of sugars together in a bowl.
Mix the ingredients together thoroughly with a spoon or mixer to create a sticky fly attractant solution.
Non-sticky fly attractant solution
Measure 750 ml (3 cups) of water, 50 ml (1/4 cup) of white vinegar and 75 ml (1/3 cup) of granulated sugar.
Combine the sugar, water and vinegar together in a bowl. Add in a banana or syrup if you desire to sweeten the mixture and make it even more attractive to flies.
Mix the ingredients together using a spoon or mixer. Use the fly attractant solution as desired.
To make a sticky fly trap or fly paper, cut a brown paper bag into strips and allow the strips to soak in the solution overnight. Cut small holes in the top of strips and tie string through the strips to create hanging fly traps.
For a liquid fly trap, pour liquid into the bottom of a jug or jar that has a small opening and allow flies to fly into the container and become trapped.