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DIY Mosquito Trap That Really Works!

DIY Mosquito Trap That Really Works!

In summer time, one of the main things that keeps people from enjoying their outdoor spaces is mosquitoes. Nothing ruins a backyard barbeque or even just a relaxing evening outside faster than a swarm of mosquitoes attacking your skin. While there are some solutions for a mosquito problem, most of them are pricey, made from possibly toxic chemicals, and require frequent reapplication.

If you’re looking for a chemical free and cheap solution to a mosquito problem, look no further!

You can make your own mosquito trap from less than $5 worth of ingredients.

There may be a lot of traps out there, but this one uses the mosquito’s natural behavior to trap them.

Just like the pitcher plant, which lures bugs into its belly, this trap uses a bait liquid that attracts the flying pests into a plastic bottle with a funnel top that keeps them stuck inside. The best part? It only takes minimal DIY skills to make.

Materials for the trap:

  • A 2 litre plastic soda bottle
  • Scissors or craft knife
  • Duct tape
  • Black paper or other opaque material

Materials needed DIY MosquitoTrap

How to make the mosquito trap:

To make the trap, you first wash out your plastic bottle and remove the label. You can use any type of plastic bottle, but we found that a 2 litre works best. Using your craft knife, cut around the top of the bottle just under where it starts to narrow into the neck. It can be helpful to draw a line with a permanent marker.

DIY Mosquito Trap 1

Be careful with your craft knife! If you don’t have one, you can always cut a small hole with a regular knife, then cut around the bottle using scissors

DIY Mosquito Trap 2

Take off the top. Turn the top of the bottle upside down and put it inside the body of the plastic bottle so it makes a funnel, then tape in place with your duct tape.

DIY Mosquito Trap

The top of the bottle funnels the mosquitoes into the body of the bottle. Once in the bottle, they aren’t equipped to turn around and fly back out.

DIY Mosquito Trap

Cover your bottle with something opaque such as black or kraft paper, vinyl sheets, or even duct tape.

DIY Mosquito Trap

You can wrap it after you add the liquid to check the level of the liquid in the bottle.

DIY Mosquito Trap

The bottle needs to be covered because mosquitoes like dark places, and they will be more drawn to the bottle.

DIY Mosquito Trap

DIY Mosquito Trap

Ingredients for the bait liquid:

  • 1 cup boiling water
  • 1 cup cold water
  • 3/4 cup sugar
  • 1 packet “active dry yeast” (about 2 teaspoons)

How to make the mosquito bait liquid

Boil one cup of water, and then add your ¾ cup of sugar to make a simple syrup. Once the sugar is completely dissolved, pour it into a heat-safe bowl. Then add your cup of cold water and allow it to cool.

Following the directions on the package, add one packet of active dry yeast, or two teaspoons if you don’t have the premeasured packets. This is the kind of yeast used for baking, not brewer’s yeast or nutritional yeast. You add it to lukewarm water (no hotter than 90 degrees F) to encourage growth without killing off the yeast, as it will die at higher temperatures.

Pour this liquid into the container, making sure that it doesn’t reach the neck of the bottle, so the bugs have a space to fly all the way in.

Why does this mosquito trap work so well?

This trap uses the natural instincts of these airborne pests to draw them into a place they can’t escape. Mosquitoes are attracted by carbon dioxide, and the combination of yeast and sugar water releases this carbon dioxide.

DIY Mosquito Trap

The carbon dioxide rises from the opening in the bottle to attract the mosquitoes. They fly into the cloud of gas and then down into the bottle to check out the sugar water as well, guided by the funnel. The black covering on the trap draws them as well, especially the female mosquitoes, who like a dark place to breed. Once inside the bottle, the mosquitoes can’t turn around and fly back out.

The key to these traps is to put more than one out and combine them with other control methods. While they will attract and trap some mosquitoes, there are just so many of the flying pests that they can’t completely clear an area. So while your DIY mosquito trap will catch some bugs for you, always remember to also pour out any standing water, plant mosquito repellent plants like lavender, or burn citronella candles. These DIY traps are a great addition to a natural mosquito control arsenal.

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23 Comments

  • Eden Frangipane Posted July 20, 2020 12:56 pm

    Have any remedies for flies? It’s like a plague at our house.

  • Rachel Delvalle Posted July 20, 2020 1:08 pm

    Can you tell me how long is this will last? Does the bait liquid need to be replaced after a certain amount of time?

    • Mona L Blake Posted July 20, 2020 3:15 pm

      Make this trap for flies, but use 1/2 juice and 1/2 water about an inch high. No need for the black cover. Place these around the area. We catch about 100 flies per day in ours. I hang them outside our doors and no more flies in the house!

      • Dana D Posted July 20, 2020 3:49 pm

        thank you for sharing!

  • Jo Posted July 20, 2020 1:31 pm

    Using the same bottle method above, but not the black paper, pour in 1 cup of water, 2 whole shrimp and let it sit about 3 days. You won’t like the smell, but the flies do. Safer way to be rid if flies. Use several in different areas.

    • The Lost Herbs Posted July 28, 2020 1:49 pm

      Hi Jo,

      Thank you so much for your comment and for your tip as well.
      I am sure it will help!

      God bless!

  • TheJules Posted July 20, 2020 1:33 pm

    Well this is synchronicity! I opened my email to look up where I got our mass marketed traps that do the exact same thing and last about 90 days, only they’re readymade and cost about $50 for four. These traps work really well! We have six spread out across 1 acre and while we still have mosquitos, their numbers are greatly reduced – very much unlike some of our neighbors. This is fantastic! Thanks so much for posting this! I have all the ingredients and will get on this today.

    • The Lost Herbs Posted July 28, 2020 1:50 pm

      Hi Thejules,

      Thank you so much for your comment.
      Natural traps are really beneficial indeed. I tried some of them and they really worked well.

      God bless!

  • Josee Posted July 20, 2020 2:21 pm

    Have you heard of burning coconut husk to deter mosquitoes? Is it effective? I love the scent which is similar to incense. Thanks!

    • The Lost Herbs Posted July 28, 2020 1:51 pm

      Hi Josee,

      Thank you so much for your comment.
      I have never heard of this procedure before, however, as far as I know, mosquitoes hate herbs like lavender, mint, lemon balm, sage, and of course, citronella.

      God bless!

  • Mary Carroll Posted July 20, 2020 9:06 pm

    Has anyone tried this for wasps?

    • judy hughes Posted July 23, 2020 3:02 am

      You can use a regular 1/2 gallon or gallon bottle. Put about 1 inch of beer in the bottom. You don’t have to cut the top of the bottle. We cut little holes in the upper sides of the bottle. I used a ‘grapefruit beer’ – Schoffenhofer. It is a sweet beer – almost has a citrus soda taste. I noticed the wasps were following me around the yard. Poured some on the table to see if the beer was attracting them………..!! This definitely works.

  • Dana D Posted July 20, 2020 9:56 pm

    Yes , you can use this , but you have to use different ingredients for the bait a mixture of vinegar and jam. https://www.bobvila.com/articles/homemade-wasp-trap/

    • The Lost Herbs Posted July 28, 2020 1:52 pm

      Hi Dana,

      Thank you so much for your comment and for your advise as well.
      We truly appreciate it.

      God bless!

  • Pam H Posted July 26, 2020 10:43 am

    Like RACHEL DELVALLE, I am curious as to how long this lasts. I am plagued with mosquitoes and have to ‘spray down’ just to walk outside. I have all kinds of ‘mosquito repellant plants’, but it feels like I live next to a swamp there are just so many of them! I’m so tired of being a walking mosquito feeding zone!

    • The Lost Herbs Posted August 14, 2020 1:15 pm

      Hi Pam,

      Thank you so much for your comment.
      As Mona L Blake said, make this trap for flies, but use 1/2 juice and 1/2 water about an inch high. No need for the black cover. Place these around the area. We catch about 100 flies per day in ours. I hang them outside our doors and no more flies in the house!

      God bless!

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  • promoting Posted August 16, 2020 11:16 am

    I’m amazеd, I һave to aԀmit. Rarely do I encounter a blog thɑt’s
    both educative and amusing, and let me tell you, you’ve hit the nail on the head.
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  • Karina Posted July 27, 2021 1:07 am

    How long does this last?

    • Pam Posted August 25, 2021 3:19 pm

      I would love to know the answer also. It’s been asked several times, but still no answer.

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