DIY Mosquito Trap That Really Works!

Chris Glover
By Chris Glover July 27, 2017 07:10

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.

Related: DIY Natural Salve For Mosquito Bites

Materials for the trap:

  • A 2 litre plastic soda bottle
  • Scissors or craft knife
  • Duct tape
  • Black paper or other opaque materialMaterials 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 TrapThe 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 TrapYou 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.

Related: Mosquito-Repelling Weeds That you can Plant this Spring in your Backyard

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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Chris Glover
By Chris Glover July 27, 2017 07:10
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29 Comments

  1. Mattwm July 27, 14:46

    First they say to discard the top of the bottle, then they say to turn it upside down. Which is it? Also, maybe a colored 2 liter bottle would work better than a clear one.

    Reply to this comment
    • Kurmudgeon July 27, 15:04

      Based on the accompanying photos, discard the bottle cap, obviously.

      Reply to this comment
    • Robby July 27, 23:58

      It clearly states to take off the top; it does not say to discard it. If you read the whole article, with pictures, you can see how simple these instructions are.

      Reply to this comment
  2. left coast chuck July 27, 15:32

    Or paint the bottle black if you just happen to have a can of black spray paint and don’t have black craft paper.

    Reply to this comment
  3. swalabr July 27, 17:02

    Great idea! How long will it be effective? A day or more?

    Reply to this comment
  4. Rocky July 27, 17:07

    Will this work on wasps and/or hornets? If not, what will?

    Reply to this comment
    • Fizzlecat August 17, 18:53

      The best thing I have found for wasps, if you can find it, is a sticky trap that’s specially colored to attract them. Its sticky surface is colored with speckles of white, green, lime green and aqua colors. We had an awful time at our cabin up at the farm with wasps, and these hanging from the porch roofs, one in front and one in back, caught a shocking number in no time, and kept the population down. I found them last summer at Tractor Supply. Can’t seem to find them this summer, although they do still carry similar ones for flies that work well too.

      Reply to this comment
  5. JINJER July 27, 18:13

    I USE ONE OF THESE IN THE HOUSE FOR GNATS WORKS GREAT

    Reply to this comment
  6. Val July 27, 18:31

    Please keep in mind that bee’s like sugar water too. I would suggest leaving on the cap and drill a hole smaller than 1/4 inch so may keep bees from going into your trap. We need the Bee’s!

    Reply to this comment
  7. Carlos July 27, 18:40

    Could someone use a sheet of bounty fabric softner in stead of water and yeast?

    Reply to this comment
  8. Beth July 27, 18:55

    Take a 1 guart jar that came with a plastic lid -drill/cut a hole the size of a BIG diameter straw/tube etc.- poke the tight fitting straw into hole , inserting 1-2 inches . Add 1 cup sugar yeast water into jar and screw on cap. Wrap the jar with a piece of a heavy dark trash bag using rubber bands quick and easy and reusuable.

    Reply to this comment
  9. CCTer July 27, 21:46

    The theory behind this is that the fermenting yeast releases CO2 and the mosquito would be attracted to the gas source. Once it stops producing CO2…its done.

    Reply to this comment
  10. Wally July 28, 02:35

    What do you have for Fire Ants

    Reply to this comment
    • G July 28, 12:22

      I get about one fire ant colony per year trying to move into my yard.
      Sprinkle a ring of Amdro around it and they’re done for.
      Cheap. Safe for pets. Won’t kill the grass. Never fails.

      If you want to get rid of other types of ants that invade your house, mix sugar and borax 50-50, place a saucer of it outside your home near where the ants come in. They’ll be gone.

      Reply to this comment
      • Fizzlecat August 17, 18:57

        AMDRO has stopped working for us (Alabama). Bayer has a white powder that is pretty effective, but after killing a bunch, the colony moves. I’ve tried just about everything: boiling water, diatomaceous earth, club soda, nothing seems to work well. I look from time to time at agricultural colleges that are doing research on this, such as in Texas- nothing really good on the horizon, it seems! >:(

        Reply to this comment
  11. Wally July 28, 02:37

    What do you have for Fire Ants This is. My first time to respond!

    Reply to this comment
    • left coast chuck July 28, 04:03

      Try diatomaceous earth for starters. Use a dust mask when applying it because it will affect your lungs. If the ants are in an area where I don’t like to use insecticide, I use boiling water. That isn’t a permanent solution but sure sets the colony back. diatomaceous earth is supposed to be a permanent solution as it rubs the protective coating off the little suckers and they die of exposure. This year I am experimenting with coffee grounds around my fruit trees. Ants are supposed to not like coffee. No results to report yet as the fruit is just starting to develop. Will post results later in the year. Due to all the rain we had this winter looks like we will have a good fruit crop.

      Reply to this comment
    • Keke from big island July 30, 00:16

      Tango has been used here where we live on the Big Island and has been very effective in getting rid of the Little Fire Ants. Tango is a bait with peanut butter in it and a substance that the LFA’s workers carry back to the queen. She ingests it and it renders her sterile. Then the workers gradually die off and the ants are controlled …..non toxic.
      We have been treated for two years. We had a terrible problem and could not spend more than then minutes on the grounds without getting bitten. Within 3 months of treatment, we literally “took back our yard”. I fell in love with working in the yard again thanks to this wonderful non toxic agent called Tango.

      Reply to this comment
  12. left coast chuck July 28, 04:06

    Japan has recently had an invasion of fire ants from China. I will follow what they are doing about it closer on NHK. It has been on the news recently. Apparently the fire ants got a good start in Japan before anyone noticed. I haven’t been following that news closely, but will from here on. Will report what the Japanese are doing if it looks like it will be successful.

    Reply to this comment
  13. YARNOVERMOM July 28, 18:02

    Sorry to say folks but this does not work. I have a creek behind my house so mosquitoes are awful. I have made several of these, put them around the back and front yarn and not one caught a mosquito. Tried it again the next year and still not one mosquito.

    Reply to this comment
    • Pat July 31, 21:04

      I did it last week and caught flies – but no mosquitoes. And ,my yeast was bubbly and fresh!

      Reply to this comment
    • PatM August 17, 23:32

      I had the same outcome. Caught 1 fly and that was all. The yeast was new and became bubbly with the water and sugar – but did not work in the 3 I made..

      Reply to this comment
  14. Dale July 30, 18:49

    Might I suggest a Fire Ant Sculpture? A bit of a pain to heat maybe 3 pounds plus of aluminum to liquid, but the results can be stunning art.

    https://www.youtube.com/results?search_query=fire+ant+sculpture

    Reply to this comment
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