How to Make a Homemade Mosquito Trap

Updated on April 6, 2018
Anthony Altorenna profile image

I like spending time in the garden, around the house, in the workshop, and fishing. Many of the projects in my articles are originals.


This easy-to-make mosquito trap can help in the fight against those biting bugs. Made from a plastic bottle, this mosquito trap entices those annoying pests to enter, yet the narrow opening makes it difficult for the insects to escape. The bait is purely organic and safe for use indoors or outside in the garden. The mosquito trap is inexpensive, takes just a few minutes to make, and it is reusable. And when you're done with the trap, the plastic bottle is recyclable.

The shady woods and wetlands surrounding our property are the perfect breeding grounds for mosquitoes. As the summer sun begins to set, hordes of hungry pests turn an enjoyable evening on the deck or sitting around the fire pit into a slaphappy session of trying to swat the bloodthirsty bugs. To combat the aerial insect attacks, we light the citronella candles and spray on some insect repellent to lessen their impact, and we also place several mosquito traps strategically around the yard.

The carbon dioxide (CO2) that we exhale through normal breathing attracts mosquitoes, and this simple mosquito trap produces CO2 to lure and capture the bugs. Once inside the trap and unable to find a tasty meal, the mosquitoes look for the exit and fly up along the insides of the bottle. With their escape route blocked, the bugs eventually tire out and fall to the bottom of the trap to die.

Will this simple trap clear your yard of mosquitoes? Nope, but they are cheap and easy to make, and another weapon to add to the arsenal in the fight against these biting bugs.

How To Make a Homemade Mosquito Trap


Cutting the Plastic Bottle

This homemade mosquito trap is easy to make from an empty 2-liter soda bottle, juice bottle or similar sized container. For this project, I used an empty 46-oz plastic juice bottle.

Start by using the razor knife or other sharp cutting tool to slice off the top section of the bottle, just below the area where the neck of the bottle flares out to meet the main section of the bottle. Be careful: the razor knife is very sharp and can easily cut through the plastic and into a finger, so use caution while cutting off the top of the bottle.


After cutting off the top of the bottle, you now have the two pieces that will rearranged to make the trap: the bottom cylinder and the bottleneck.

When inverted and with the cap removed, the neck section of the bottle now resembles a funnel.

The inverted bottleneck traps any mosquitoes that enter
The inverted bottleneck traps any mosquitoes that enter | Source

Assembling the Trap

Flip the removed neck section over so that the neck of the funnel points downward, remove the cap and insert the neck section into the body of the bottle.

Do not push the funnel all of the way down to the bottom of the bottle. Leave enough space between the bottle neck and bottom of the bottle for adding a cup or so of liquid, plus an air space between the surface of the liquid and the lowest point of the funnel. For my bottle, the distance between the end of the funnel to the bottom of the bottle is about 2".

Sealing the trap
Sealing the trap | Source

Seal Off the Escape Route

Use the duct tape to secure the funnel. The duct tape not only holds the funnel in place, it also seals the edges of the funnel against the edges of the bottle, making it harder for any bugs that enter the mosquito trap to escape.

Wrap a piece of black construction paper around the base of the mosquito trap, or use black spray paint to cover the outside of the trap. The dark covering blocks out the sunlight, keeping the trap cooler and helping to extend the active life of the yeast and sugar water bait.

Mosquito Bait Recipe
Mosquito Bait Recipe | Source

The Difference is the Mosquito Bait

Mosquitoes are attracted by carbon dioxide. As we exhale, we expel carbon dioxide vapor. Mosquitoes follow vapor trails of CO2, knowing that a fresh meal of warm blood is at the other end. So to attract mosquitoes and to entice them to enter our trap, we need a source of carbon dioxide.

Here's where the yeast and the brown sugar comes into play. Activating the yeast and giving it a food source (the brown sugar water mixture) stimulates the yeast to grow and multiple -- giving off carbon dioxide in the process. Hungry mosquitoes follow the CO2 trail into the bottle and down through the funnel. But when their tiny insect minds realize that there's no food to be found, they typically fly along the surface of the brown sugar mixture until they reach the sides of the bottle. The bugs then fly up the side of the bottle but their escape is blocked by the inverted funnel (the reason for sealing the edges with duct tape). The little biters are trapped!

Eventually, the mosquitoes tire and fall down into the liquid to drown. Sure, some lucky mosquitoes may find their way back up through the narrow entrance of the funnel to freedom (and to bite again another day) but the majority of bugs that enter the trap will perish there.

Mosquito Bait Ingredients

  • 1/4 Cup Brown Sugar
  • 1 Cup Hot Water
  • 1 Tsp Dry Active Yeast


  1. To mix the mosquito bait: Add 1/4 cup of brown sugar to 1 cup of boiling water and mix thoroughly until the sugar is dissolved completely. Allow the mixture to cool until you can comfortably stick your finger into the mixture; ideally, the temperature of the sugar water should be between 120 to 130 degrees Fahrenheit ( degrees Celsius). Too hot, and the high temperature will kill the yeast. Too cool, and the yeast will not fully activate.
  2. When the sugar mixture reaches the correct temperature, gently mix in the yeast. Pour the yeast and sugar mixture into the bottle (the inverted funnel makes this easy) and the mosquito trap is ready to go.
The homemade mosquito trap in the garden
The homemade mosquito trap in the garden | Source

Setting Out the Mosquito Traps

Place the homemade mosquito trap in a shady area. Since the goal of the trap is to entice mosquitoes into the areas and into the trap, do not place the bottle too close to your sitting and deck areas. For example, we placed several mosquito traps around the outer perimeter of our fire pit. As evening approaches, mosquitoes come out from the surrounding woods and wetlands in search of their victims. Before reaching the sitting areas around the fire pit, some of the bugs are attracted by the carbon dioxide trail emanating from the yeast mixture inside the mosquito traps, and follow the trail to their doom.

We place a few other bottle traps around the perimeter of our deck, just beyond the sitting and dining areas, to draw the mosquitoes away from the gathering area and towards the traps. Every week or so throughout the summer months, we empty the traps by pouring out the contents and then refill the mosquito traps with a fresh batch of the yeast and sugar water mixture. At the end of the season, we dump the contents one final time and then toss the traps into the recycling bin.

Will This Homemade Mosquito Trap Eliminate all of the Biting Bugs in My Yard?

No, this simple homemade mosquito trap will not capture and kill all of the mosquitoes in your yard nor eliminate the risk of being bitten. For best results, try combining the mosquito traps with other methods of mosquito control.

The mosquito trap works and offers several benefits over other bug killing methods:

  1. The homemade mosquito trap works 24 hours a day, for up to two weeks.
  2. The trap is easy to make from inexpensive materials and ingredients. No special tools are needed.
  3. No electricity, extension cords or timers needed.
  4. Does not require expensive propane to operate.
  5. Maintenance is easy, and there are no fans or other moving parts that can break down.
  6. The mosquito bait is completely organic and can be used safely around pets and children

Mosquito Facts

Did You Know?

  • There are over 3,500 species of mosquitoes.Mosquito is a Spanish word meaning "little fly".
  • Only female mosquitoes feed on blood. The female mosquito needs a meal of blood to help her eggs to develop.
  • A female mosquito can lay up to 300 eggs at a time, which are usually deposited on the surface of stagnant water.
  • Mosquito eggs need water to hatch. The tiny embryo wrigglers live in water for about 10 days before pupating into mosquitoes.
  • Adult mosquitoes live for up to two months.
  • Diseases carried by mosquitoes include West Nile virus, malaria and encephalitis.Mosquitoes are attracted carbon dioxide, body heat and sweat, and dark clothing.
  • DEET is an effective mosquito repellent, and picaridin and lemon-eucalyptus oil are also recommended by the Centers for Disease Control as mosquito repellents.
  • Mosquito traps are proven methods for controlling mosquitoes, though no single method is 100% effective.

How To Make A Homemade Mosquito Trap - This short video provides a visual demonstration on the concept of using a plastic bottle to make an effective mosquito t

Things You'll Need:

2-Liter Plastic Soda Bottle (or similar container) ~ Razor Knife ~Duct Tape ~ Instant Yeast ~ Brown Sugar

How Do You Combat Mosquitoes?

How Do You Combat Mosquitoes?

See results

Use Multiple Methods of Mosquito Control

To increase the effectiveness of controlling mosquitoes in your yard, use the homemade mosquito traps in conjunction with other methods of mosquito control including repellents, insect zappers and mosquito magnets.

Flowtron BK-80D 80-Watt Electronic Insect Killer, 1-1/2 Acre Coverage
Flowtron BK-80D 80-Watt Electronic Insect Killer, 1-1/2 Acre Coverage

Attracts mosquitoes and other biting insects.Hang the Flowtron Insect Killer at least 25 feet away from sitting and dining areas. Remember, the Insect Killer works by attracting bugs into a specific area.


Questions & Answers

    © 2013 Anthony Altorenna

    Please share your tips for controlling mosquitoes

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      • profile image

        Martin 4 months ago

        I tried it but didn't work out. Where I live is full of mosquitoes but not even one got trapped in the 4 traps I made.

      • profile image

        mrsgreenjeans 22 months ago

        Another control is to create a water feature and stock it with a few guppies. Doesn't have to hold a lot of water. Ours is 10 gallons. Process works because the female lays eggs in water (water feature!) and the fish eat the eggs. If any eggs are missed and hatch out, the fish eat the larve. We have used this for years but I plan on stocking some of these traps around the perimeter of our property.

      • Jacolive profile image

        Jacolive 3 years ago

        What a great idea, I never knew it was the co2 that attracts them. I will definitely try this.

      • LampsPest profile image

        LampsPest 3 years ago

        I own a pest control company which performs mosquito treatments. I understand my services are not for everyone so I like some of your suggestions like the trap utilizing yeast.Very informative lens.

      • profile image

        burntchestnut 4 years ago

        I love your idea for a home made mosquito trap. I don't like the idea of bug zappers because they can zap ALL bugs attracted to the light, many of them being beneficial. If I'm outdoors at dusk, I wear long a long sleeved shirt and long pants rather than shorts. I use a fan if I'm sitting outside on a porch or somewhere with electricity.

      • frayne profile image

        frayne 4 years ago

        I used spray and zapper in controlling mosquitoes.

      • profile image

        ColettaTeske 4 years ago

        I've seen this method all over the internet, but this is the first time I've seen it used with sugar. I did this without sugar and it didn't work. I'm going to try it again. I think sugar was the missing ingredient. I know my pizza dough doesn't rise without a little sprinkle of sugar! Thank you for the great article!

      • JohnTannahill profile image

        John Tannahill 4 years ago from Somewhere in England

        I will have to try this mosquito trap when the warmer weather gets here. Thanks.

      • profile image

        anonymous 4 years ago

        I am so glad to hear your mosquitoes and those around the world can now die organically with your very clever sweet it is! I don't care for sprays but a good campfire will usually keep them away and I like to use mosquito netting as I'll enjoy mosquito trapping too! Actually, we don't have a lot of mosquitoes in Fargo most of the time where I live because there is no real habitat for them around me but they are still pesky pests where they can breed....and they do travel for a meal! FB like and G+ to get the word out on your trap line. :)