Hello dear friends!

As some of my followers already know, I live in Bologna (Italy), in the heart of Po river Valley.

This area is known as the wettest one of Italy. This is due to terrain, level (a lot of areas are UNDER sea level) and weather.

These factors result in very hot temperatures in summer, very cold ones in winter, an incredibly thick fog but, mostly, giant and aggressive mosquitoes.

There is a city, Comacchio (only 55 miles from Bologna), that is known as the "Mosquitoes Town". XD

Obviously is nothing tropical, but it's very annoying!

It's really difficult to enjoy summer evenings without using pesticides, sprays or other stinky poisons. Or, you can always avoid using anything and... be eaten alive by these little vampires.

While mosquitoes are useful for the ecosystem (did you know that mosquitoes are the main cocoa plants pollinators? No mosquitoes means no chocolate!!!), we don't want them to fly around our garden and bite everything that's alive, pets included.

In this Instructable, I want to show you an all natural and potentially free way to create an efficent mosquito trap with little more than a plastic bottle!

Why potentially free? Because we will use materials that are always present in our home!


Let's start with our shopping list.

Step 1: Shopping list

For our trap we will need:

  • Plastic bottle (2 liters one is good)
  • 4 spoons of white sugar
  • 10gr (0.70oz) Brewer's yeast (freeze-dried one or fresh)
  • 200ml (6.75oz) water (and a pot for boiling)
  • Tape
  • Black cardboard (or similar dark covering)
  • Scissors

Optional for hanging

  • String
  • Liquor can container (like Baileys one, look at the images for more info)
  • Drill

If you have the liquor can container, you won't need black cardboard, we will see why.

NOTE: A lot of users reported me different results. Someone have found a full trap and some other an empty bottle after several attempts. You should experiment a bit by changing the amount of yeast in each traps, in fact only some kind of mosquitoes are attracted by this trap and the amount of CO2 released change the effectiveness depending on climate/humidity of your zone. For example, I've found a full bottle on the first attempt and much less dead mosquitoes in the next two bottles (with same recipe). I'm experimenting different mixtures in these days ;)

As you can see, these are very common and easy to find materials.

I didn't have to buy anything except for the brewer's yeast (I can't find fresh one...darn).

Let's move on the first thing: cutting the bottle!

<p>I think these are great and fun to make thanks for the tips!! :D I hope the one I made works </p><p>For those who dont have the time and want to find a affordable mosquito trap I recommend this one: </p><p><a href="http://www.amazon.com/SmarTrap-Insect-Mosquito-Indoor-Outdoor/dp/B00Q3LP6FY/ref=sr_1_fkmr0_1?ie=UTF8&qid=1430861718&sr=8-1-fkmr0&keywords=mosquito+trap" rel="nofollow">http://www.amazon.com/SmarTrap-Insect-Mosquito-Ind...</a></p>
+ethans8 which bait should i use instead of yeast plz answer
<p>EthanS8 : Don't ya think that $50 bucks is kinda steep for an 'affordable' trap, especially when the unit described here costs nearly zero?</p>
Great advice, thank you! :D
<p>i tried , and got nothing</p>
Studies show mosquitoes don't like red. The Baileys can is red. They prefer green then black and blue. Perhaps the red can is why some places are less effective. I'm going to try this as I'm genetically a mosquito target. Thanks.
<p>I made it strictly as you did, caught nothing!</p>
<p>I can't find Brewers Yeast at my Walmart, will yeast for bread-making work?</p>
<p>I rarely drink soft drinks or buy bottled water, so I recycled what I had....a plastic juice bottle. Since the mouth was considerably bigger than a PET bottle, I merely drilled a hole in the cap that would accommodate a mosquito! And instead of tape, I hot-glued the two pieces together. This is going out on my shady porch!<br><br>Thanks for the Instructable!</p>
<p>My English is not very good. I'm sorry if what I said offended you. I didn't mean to step on anyone's toes.</p><p>May i ask if the trap works for you? I just don't think that will work if you hang the trap outside. Here is my confirm video.</p><p><iframe allowfullscreen="" frameborder="0" height="281" src="//www.youtube.com/embed/T0WMsCLOXhs" width="500"></iframe></p><p>And i had translated some contents written by the original developers.</p><p><a href="http://resolaqqen.blogspot.tw/2015/05/ecological-mosquito-trap-prologue-and.html" rel="nofollow">http://resolaqqen.blogspot.tw/2015/05/ecological-m...</a></p><p>Based on these data and my experiences, hang the trap outside would catch nothing except the fruit flies.</p>
<p>Thanks for the bottle trap instructable.</p><p>May I ask the source of your information regarding mosquitoes being a pollinator of cacao flowers? Have you ever observed mosquitoes on cacao? I have been told by certain researchers that it may very well be physically impossible for mosquitoes to act as pollinators given the size of the cacao flower and the anatomy of the stamen, but I am willing to give you the benefit of the doubt, if you can provide scientific evidence of this.</p>
Um, so... you are not giving &quot;benefit of the doubt&quot; if you require proof.
<p>Hi friend! :) No, I've never seen mosquitoes on cacao with my own eyes, but I've read it in a &quot;Le Scienze&quot; (italian version of Scientific American) article years ago.</p><p>You can find a lot of similar articles on various scientific websites!</p><p>Here's an example :)</p><p><a href="http://www.nature.com/news/2010/100721/full/466432a.html" rel="nofollow">http://www.nature.com/news/2010/100721/full/466432...</a></p><p>Have a super day!</p>
<p>Thanks so much for this great how-to article - I will most definitely be trying this - I have a beautiful deck on my property but those little vampires make it unpleasant to sit out there and enjoy it!! Thanks again! </p><p>Peace &amp; Blessings to you and yours,</p><p>Paulette :)</p>
Great! Post a photo of you work, I'm curioius ;D
<p>I'm ready for the hot season...</p><p>Thank you for the inspiration! :)</p>
<p>I made something like this. It was fun to see what it would catch. It was so full of earwigs, I was not able to tell if I caught mosquitos. Happy though to take down the earwigs.</p>
Great! The results can be totally different from zones, climates and seasons. Nice catch with earwigs :)
I'll try it on my next camping
It also works Indoors to catch Flys. I am still however, working on a trap like this for ants.
<p>Will this also attract mosquito from the neighbor's gardens?</p>
<p>mmm, don't think so, it's not enough powerful</p>
<p>mmm, don't think so, it's not enough powerful</p>
<p>Congratulations on your Grand Prize win!! </p>
<p>Thank you a lot IamGutter! :D</p>
<p>a huge congratulations on your big win!</p>
<p>Thank you, this is amazing! :D</p>
<p> Interesting Concept</p>
<p>Thanks! :)</p>
<p>Congrats on making finalist! Can't believe the view count! Wow. I need to try this method. Am sharing with hubby so he can make one. Thanks for sharing and keep shining. </p><p>sunshiine </p>
<p>Thank you sunshiine! :D :D :D</p>
<p>Although the camping trip didn't happen, I did make this trap. I set it out indoors for some time (although I don't have a mosquito problem indoors, in general) and it didn't catch anything. Then I put it out overnight near the garage: it has been quite damp, and mosquitoes frequent the area. Today I emptied the contents onto a paper towel to see what was caught. Alas, it was just a couple flies. The odor was very yeast-like, and I wonder if that contributed to the mosquitoes avoiding it. Has anyone had a proven success?</p>
<p>Thank you sir, for taking the time to post. Good info!</p>
<p>My pleasure dear friend! :)</p>
<p>I'm trying to think if we have bottles with this style (the grip part) in the US. The easiest 2 liter bottles to get a hold of is soda bottles, which (around here) are straight up and down.</p>
<p>I've travelled in the US a lot of years ago, and I remember to drank from a bottle like this... if you can't find this kind, simply help yourself with some extra tape! :)</p>
Propel bottles might do.
<p>Try maybe water or juice bottles.</p>
<p>I understand how the tape holds the upside-down top you cut off the bottle in place inside the larger portion of plastic bottle as a funnel to confuse any attempted escaping mosquitoes. I see tape around the top of the Baileys can. For the life of me, I can't understand why that is there. Is the Baileys can sharp there and you are protecting yourself from it? Does the tape help keep the plastic bottle in place inside the Baileys can? For what reason does it exist? </p><p>Oh, never mind. I see now that the plastic bottle doesn't fit fully inside the Baileys can as the tape makes it too large to slide down all the way. </p>
<p>I also just noticed that the top part that you cut off is inverted when you tape it back and I don't think that was mentioned on the instructions and if you did I missed it. Is that why you use the tape? .Thanks anyways. AL.</p>
<p>I mentioned in step 3: &quot;Now that the mixture is ready,<strong style=""> put the top part of the bottle inside the big one, face down, to create a funnel</strong> (the picture shows it well).&quot;</p><p>It's used to make the funnel effect :) Also, we use black tape for 2 reasons: hold evrything in place and seal the bottle to avoid too much CO2 to go away ^_^</p>
<p>In addition to which I just read that skeets are particularly attracted to black, navy and red so the bailey's red is right on for an added attractant; however I also read that bats are NOT that interested in skeets as a first choice, they prefer other insects. Right now after wearing 2 layers in my gardening, I have 16 very itchy bites on my upper arm, shoulders and hands. They bite right through 2 layers, with lots of herbal spray and a net hat with veil over face. North Central FL has been raining for weeks and they are the worst ever. I tried this with chopped meat in it for yellow flies who are way worse than skeets and the rain kept filling up the jug and not one fly. So I gave up but will try again. I think someone here gave an ible for herbal mosquito spray with witch hazel and several essential oils. About to make that. Very frustrating.</p>
<p>For the bites you did receive, toothache pain reliever like orajel works to stop the itch and it does not return. I have also read that a warm metal spoon will relieve the itch and stop the reaction from the bite, however, I have not tried that method.</p>
<p>Best mosquito bite remedy... Hairdryer treatment. This works EVERYTIME. I am one of those people that gets bit when no-one else is, so I know this works. Take a hairdryer and blow the hot air on the bite/s for as long as you can stand it w/o burning yourself. That's it! The hot air destroys the proteins that cause the redness, swelling and itching. My bites disappear and never get itchy anymore :)</p>
<p>No prob! :)</p>
<p>wow!! 300k visits in one month! record!! :-)</p>
<h4>Yes, I can not believe it myself! D:</h4>

About This Instructable


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Bio: Hi everybody! I'm Filippo from Bologna, Italy! My friends call me Orso (Bear) :) I follow Instructables since 2009, and it has always been one ... More »
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