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 

 

 

 1 empty 1–2 L plastic bottle 

 

 

 1 cup ( 200 g ) sugar 

 

 

 1 cup hot water 

 

 

 ½ cup cool water 

 

 

 ½ teaspoon dry yeast 

 

 

 Black tape or paper (to darken the bottle) 

 

 

 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 

 

 

 Pour hot water into the bottom half. 

 

 

 Add sugar and stir until dissolved. 

 

 

 Pour in the cool water to bring the mix to lukewarm (NOT hot). 

 

 

 If it’s too hot, it kills the yeast. 

 

 

 

 

 3. Add yeast 

 Sprinkle yeast on top. Do not stir — it will activate slowly and start producing CO₂. 

 4. Assemble the trap 

 

 

 Place the top half (funnel) upside down into the bottom half. 

 

 

 Tape the edges to seal it. 

 

 

 5. Darken the bottle 

 Mosquitoes prefer dark areas; wrap the bottle with: 

 

 

 black paper, or 

 

 

 black tape Leave the top open. 

 

 

 6. Place the trap 

 Put the trap in: 

 

 

 corners of rooms 

 

 

 under tables 

 

 

 near dark/humid areas 

 

 

 Avoid windy areas or directly under fans. 

 

 🧪 Why It Works 

 

 

 Sugar + yeast = fermentation 

 

 

 Fermentation releases CO₂ , similar to human breath 

 

 

 Mosquitoes follow the CO₂ stream into the funnel 

 

 

 Once inside, they get trapped and die 

 

 

 

 ⏱️ How Long It Lasts 

 

 

 Effectiveness lasts 3–5 days , depending on room temperature. 

 

 

 Replace the mixture weekly. 

 

 

 

 ⚠️ Safety Notes (Important) 

 This method is safe because: 

 

 

 Fermentation produces very small amounts of CO₂ (not dangerous in a ventilated home) 

 

 

 No chemicals or flames are used 

 

 

 Non-toxic for pets and kids if placed out of reach