Homemade mosquito traps made from plastic bottles are popular online because they’re inexpensive and easy to make. Most versions use a mixture of warm water, sugar, and yeast, which produces carbon dioxide (CO₂). Mosquitoes are attracted to CO₂ because it’s one of the cues they use to locate people and animals.
While these traps may catch some mosquitoes, they are not a complete solution and won’t eliminate an entire mosquito population. For the best protection, combine traps with other mosquito-control methods such as removing standing water, using window screens, and applying EPA-approved insect repellents when needed.
How the Homemade Mosquito Trap Works
The trap relies on a simple principle:
- Sugar feeds the yeast.
- The yeast produces carbon dioxide (CO₂).
- Mosquitoes are attracted to the CO₂.
- The funnel-shaped bottle makes it difficult for some mosquitoes to escape after entering.
Keep in mind that effectiveness varies depending on mosquito species, weather, and where the trap is placed.
What You’ll Need
- One 2-liter plastic bottle
- 1 cup warm water (not hot)
- ¼ cup brown or white sugar
- 1 teaspoon active dry yeast
- Black paper or dark cloth
- Scissors or a utility knife
- Tape
