Materials required for a homemade wasp trap include a plastic bottle, such as a 2-liter soda bottle or a 0.5-liter water bottle, tape, string and bait. The best wasp bait depends on the time of year.
To assemble the homemade wasp trap, discard the lid of the plastic bottle, cut the top off about 1/2 inch below the point where the bottle reaches its full width, and invert the top to form a funnel. Press the funnel into the remaining portion of the bottle and cut holes in opposite sides to attach the string for hanging. Use tape to seal the two pieces of the bottle so trapped wasps are unable to escape. Bright orange or yellow tape helps attract more wasps.
Choose your bait depending on the time of year. From spring until summer, use a protein source, such as beef, to bait the trap. Avoid chicken, which is less attractive to wasps than other meat sources. When temperatures are at the maximum until frost, bait the trap with something sweet, such as honey diluted with water or flat soda. Add some water to the bottom of the trap and a few drops of dishwashing detergent to make it more difficult for the wasps to escape. Avoid placing traps near flowering shrubs or trees so they do not trap bees.