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mozzie co2 trap
✅ Safe DIY CO₂ Mosquito Trap (Yeast + Sugar Bottle Trap)
This is the classic, safe version that releases small amounts of CO₂ through fermentation.
What You Need
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1 empty 1–2 L plastic bottle
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1 cup (200 g) sugar
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1 cup hot water
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½ cup cool water
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½ teaspoon dry yeast
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Black tape or paper (to darken the bottle)
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A knife/scissors
🛠️ How to Make It
1. Cut the bottle
Cut the bottle about ⅓ from the top.
You’ll use the bottom part as the container, and the top as a funnel.
2. Make the sugar solution
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Pour hot water into the bottom half.
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Add sugar and stir until dissolved.
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Pour in the cool water to bring the mix to lukewarm (NOT hot).
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If it’s too hot, it kills the yeast.
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3. Add yeast
Sprinkle yeast on top.
Do not stir — it will activate slowly and start producing CO₂.
4. Assemble the trap
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Place the top half (funnel) upside down into the bottom half.
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Tape the edges to seal it.
5. Darken the bottle
Mosquitoes prefer dark areas; wrap the bottle with:
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black paper, or
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black tape
Leave the top open.
6. Place the trap
Put the trap in:
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corners of rooms
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under tables
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near dark/humid areas
Avoid windy areas or directly under fans.
🧪 Why It Works
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Sugar + yeast = fermentation
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Fermentation releases CO₂, similar to human breath
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Mosquitoes follow the CO₂ stream into the funnel
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Once inside, they get trapped and die
⏱️ How Long It Lasts
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Effectiveness lasts 3–5 days, depending on room temperature.
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Replace the mixture weekly.
⚠️ Safety Notes (Important)
This method is safe because:
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Fermentation produces very small amounts of CO₂ (not dangerous in a ventilated home)
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No chemicals or flames are used
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Non-toxic for pets and kids if placed out of reach