Gardening

How to Safely Kill Mosquitoes In Your Yard

How to Safely Kill Mosquitoes In Your Yard thumbnail
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Trying to figure out how to prevent or safely kill mosquitoes in your yard without using dangerous synthetic chemicals that harm wildlife or people? This article will help!   


Do you want to have a safe, healthy, mosquito-free yard and neighborhood? So do we. 

We set out to figure out how to make that possible, looking at the best available research. We’ve also put that information to work effectively in our own yard, and have recruited our neighbors to be part of the solution. 

The results? We can walk out in our yard on hot, humid summer mornings and evenings without being covered in mosquitoes like we used to be.  

Want to get the same results? Follow the steps in the flier (below), then print and share them with your neighbors!

The more people in your neighborhood who participate, the better the results will be. After all, mosquitoes don’t recognize property boundaries. 

How to safely kill mosquitoes: informational flyer

(click image to enlarge)

Click here to download the printable 8.5 x 10″ PDF version of the above flier.

Read the full article below for details, references, and helpful mosquito facts!

The vast majority of insects are “good” and can help control the “bad” insects

We should preface this article by saying that we LOVE insects. Lacewings, praying mantises, ladybugs, wheel bugs, wasps, bees, etc..

With few exceptions, insects are welcome in our yard. We even welcome common pest insects like aphids, because they’re great food for our predatory insects, such as ladybugs.

The fact is that 95% of all insects are beneficial or benign. And many of the good ones are predators that help control the pest and biting insects.  

We do our best to plant a diversity of flowering plants to attract, feed, and provide breeding habitat for insects. Most predatory insects also eat nectar (sugar/carbohydrates) and pollen (protein and fat) in addition to other insects.

Beautiful Gulf Fritillary butterflies pollinating zinnias in our garden. They're quite charismatic as adults, but people often spray their larvae with insecticides because they look scary.

Beautiful Gulf Fritillary butterflies pollinating zinnias in our garden. They’re quite charismatic as adults, but people often spray their larvae with insecticides because they look scary.

However, there are some insects that we sometimes wish would permanently vanish from the face of the earth… One such insect is the mosquito, which is universally reviled by virtually every human culture on the planet.

Mosquitoes Can Be Good?

First some interesting mosquito facts:

  • There are over 3,500 species of mosquitoes and only a few hundred of those species bite.
  • Mosquitoes are a great food source for lots of other creatures (including predatory insects like dragonflies).
  • Male mosquitoes can’t bite; only the females can.
  • Both male and female mosquitoes are actually pollinators.

Mosquito on Flower.JPG
A mosquito pollinating a marigold flower. Image credit: Abhishek727 Abhishek Mishra – Own work, CC BY-SA 3.0, Link

Mosquitoes can also be deadly bad

There is a long list of terrible diseases that blood-sucking and blood-transferring mosquitoes spread to people:

  • malaria,
  • yellow fever,
  • dengue fever,
  • Japanese encephalitis,
  • Rift Valley fever,
  • Chikungunya virus,
  • West Nile virus,
  • Zika virus,
  • and on and on…

So it’s easy to understand why mosquitoes are so hated. Not to mention, nothing ruins a beautiful summer day faster than a swarm of biting mosquitoes.

What Would Happen If We Killed Every Mosquito In The World?

Ever wonder what would happen if every biting mosquito on earth were to vanish? Scientists have debated that very question.

The general consensus? Despite a few negative ecological impacts, other insect species would fill the void left by mosquitoes, and the overall results for people and planet would be a net positive. 

Cutting off the nose to spite the face 

While the complete global eradication of every “good” or “bad” mosquito species is a purely hypothetical and unrealistic aim, it’s not at all unrealistic to try to kill or prevent mosquitoes in your own yard. However, it’s essential that you do so in a way that’s ecologically rational(E.g. your efforts to kill mosquitoes doesn’t risk harming other organisms, including people, pets, and beneficial wildlife.)

Culex pipiens diagram num.svg
Reciting the names of every mosquito body part from memory makes a great impression on a first date. Image credit: Mariana Ruiz Villarreal LadyofHats – Self made based on this websites between others: [1], [2], [3], [4]., Public Domain, Link

In our yard — which is right smack in the middle of the hot, humid southeastern US (aka mosquito heaven) — we have virtually no mosquitoes. And we’ve managed to accomplish this objective with no discernible negative impact to other species.

The cost? You’ve probably paid more for lunch.

Here’s how we got rid of our mosquitoes using safe, organic methods and how you can too…

Want to safely kill mosquitoes? Step 1: Understand how they work.

If you want to get rid of mosquitoes in your yard, you have to start by understanding the life cycle of mosquitoes and what they’re attracted to. From there, the solutions outlined in this article to help you safely kill mosquitoes will make perfect sense. 

Very quickly, here’s a quick rundown of some of the things you need to know about mosquitoes to kill them or effectively stop them from proliferating:

A. What is a mosquito’s life cycle?

The life cycle of a mosquito is: Egg > Larva > Pupa > Adult.

Mosquito larva 20090504.JPG
Mosquito larva. No, this is not actual size. Image credit: Sven.petersenOwn work, Public Domain, Link

Depending on the species:

  • a female ADULT mosquito will live anywhere between 6-8 weeks, and
  • a male adult mosquito will live about 10 days.

The time it takes mosquitoes to go from egg to adult (the “aquatic cycle”) can take anywhere from a few days to a couple of weeks depending on the species. This process is sped up by hot weather and ideal breeding grounds, e.g. stagnant water with decomposing organic matter (leaves and plant material).

B. How far can mosquitoes fly?

The distance a mosquito can fly depends on the species. For instance, Aedes Aegypti (the mosquitoes responsible for the recent spread of Zika Virus) will only travel about 50-100 meters. Others can fly for many miles over the course of their lives.

But the better the conditions are in a given spot, the more likely they are to stay there and the more they’re going to reproduce.  

C. What do mosquitoes need to reproduce?

Female mosquitoes need to ingest animal blood in order to get the macronutrients they need to produce eggs. Then they have to lay their eggs somewhere that:

  1. Will have standing water for 3-10 days straight. Bowls of pet water, planter trays, clogged gutters, etc. Species of flood water mosquitoes lay their eggs in the soil on flood plains which then hatch next time there’s standing water, but this likely does not apply to your home landscape.
  2. Has water that contains the decomposing plant matter that fosters the microorganisms (algae, plankton, fungi and bacteria) their larvae need to eat in order to grow into pupa. Mosquitoes don’t eat during the pupal stage.

D. How many new mosquitoes can a single mosquito produce?

A single mating pair of mosquitoes can breed thousands of new adult mosquitoes over the course of their short lifecycle. If you’ve ever been near a swamp in the summertime, you’ve had firsthand experience of how quickly mosquitoes can breed under ideal circumstances.

Now that you know the basics that mosquitoes need to complete their lifecycle and breed, it’s time for you to learn how to break their lifecycle and safely kill mosquitoes in your yard!

Step By Step: How to Safely Kill Mosquitoes In Your Yard

First, get rid of all standing water in your yard including.

Common sources of standing water include:

  • clogged gutters
  • stored buckets
  • saucers underneath potted plants
  • bird baths (unless you change them daily)
  • pet water dishes (unless you change them daily)
  • water on certain plants that hold water (example: we grow pineapples in pots and have to turn over the plants to drain the small pools of water that form in the leaf-axils after a rain)

Second, you’re going to want to ATTRACT any female mosquitoes that happen to be in your yard to lay their eggs in baited water intended to kill their larvae.

What do you put in the baited water to kill the mosquito larvae? Poison? Nuclear weapons? Nope. 

You’re going to harness the power of a simple bacteria, Bacillus thuringiensis israelensis (Bti), to do the mosquito-larvae-murdering for you, safely and efficiently.

You don’t have to be a microbiologist to use Bti. In fact, you can buy a summer’s-long supply of the same Bti mosquito “dunks” that we use for $20 on Amazon.

Bt dunks are harmless to beneficial insects, pets, birds, fish, and other wildlife — especially when used as detailed below.

How to use Bt mosquito dunks

Once you have your Bt mosquito dunks, just follow these steps to get the most bang for your buck while minimizing the potential harm to other wildlife:

Step 1: Fill a small buckets with water.

Step 2: Add a small bit of dead plant matter (old leaves, grass clippings, etc) to help make the water smell even more attractive to female egg-laying mosquitoes. The dunks also have material in them that helps attract egg laying mosquitoes.

Step 3: (optional) Cut a small 1/2″ mesh cage to place over the water bucket to keep any pets from drinking it. Again, Bti is thought to be harmless to animals and is even approved for use on organic farms, but you don’t want to have to replace your water every few days after Spot or Fluffy drinks it. The cage also helps to keep frogs and other vertebrates from falling in and drowning.

Step 4: Put a stick in the bucket that stretches from the bottom to above the surface rim. This ensures that if a frog, lizard or other critter does somehow manage to fall in, they can crawl up the stick and out of the bucket. (ut or bend a spot in the wire to allow the critters out from under the cage.)

Step 5: Place your mosquito-murdering buckets in shady, relatively moist areas of your yard where mosquitoes would naturally congregate. Ideal spots: under bushes, under the deck, the shady area near the creek, etc.

Then, set a calendar reminder in your phone to replace the dunks in each bucket once per month, topping up the water as-needed.

Note: If areas of your yard have standing water (such as a drainage ditch), you’ll also want to toss in one or more dunks depending on the volume of water present. 

The final product - this is one of five

The final product – this is one of five “mosquito dunk buckets” we use throughout the summer. This one is down on the edge of the woods on our property.

Now it’s time to let your Bti bacteria work its magic and enjoy the drastic reduction of mosquitoes in your yard! You should start noticing results within a couple of weeks or sooner. Once it starts working, your mosquito populations will decline drastically! 

Reminder: If you want to make your mosquito control measures even more effective, get the neighbors around you to follow the simple, inexpensive steps in this article!

Happy mosquito-free summer from Tyrant Farms!

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