Mosquito Killers and Repellers

Tested by Hannah at DIY Gardening

Tested and Compared by Hannah Miller and Fact Checked by Daniel Woodley. Published to Products on the 20th August 2020. Updated: 26th February 2023.

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Mosquitos are perhaps the most irritating gardening pest there is; a real gardener’s vampire. They’ve been known to ruin a fair few garden parties and events too!

These flying menaces always seem to make an appearance at the worst possible time for us, usually when we have our dinner in the garden after a hot summer day.

It doesn’t help that we have a public pond nearby that they use to breed.

Here, I take a look at four common mosquito products and share my experiences of using them:

Gadino mosquito killer

1) Benzano Indoor Mosquito Deterrent:

  • The highest rated indoor mosquito and fly deterrent.
  • Over 2300 Amazon reviews.
  • Chemical-free and pet safe.
  • Covers a wide area.

2) BugZapper:

  • Found in restaurants and commercial kitchens.
  • Kills rather than repels mosquitos.
  • No chemicals.
  • Last for years.
Neem spray for mosquitos

3) Neem Oil:

  • Natural and effective mosquito deterrent and killer.
  • Extracted from Neem trees which naturally repel mosquitos.
  • Widely used in India.
  • No toxic compounds and safe for children over 4 yrs.
Mosquito water dunks

4) Mosquito Killer Dunks:

  • Use in any standing water.
  • Ponds, gutters, rain barrels, water features etc.
  • Pet safe, also safe for fish and humans.
  • Kills juvenile mosquitoes before they are old enough to bite.

1) Bezan Indoor Deterrent: 

Bezano mosquito repeller


While not technically a mosquito killer, this product from Bezano is a repeller.

In each pack, you get six devices that you can plug into the power sockets around your home.

The devices emit a low-level ultrasonic wave that mosquitos and other bugs hate.

During testing, I noticed a significant drop in the number of flying insects that came into the property.

I previously used ultrasonic devices to keep cats out of my garden and when I researched the topic I found evidence from the RSPCA and also an Australian research paper that such devices reduce cat intrusions by up to 46%.

The ultrasonic noise from this device is targeted toward small insects, meaning cats, dogs and humans won’t hear it.

I can confirm that Doogie, our resident dog, didn’t behave differently when the devices were switched on.

This product from Benzano devices is 100% safe and contains no chemicals, glues or foul odours, and you can use it in any room, even the kitchen.


  • It’s the best indoor mosquito deterrent I’ve ever tested.
  • The positive reviews – over 2300 so far.
  • The devices are small and discreet.
  • I liked the fact that I didn’t need to use chemicals.


  • It doesn’t kill them, it just repels them, pushing them to another area.
  • During testing, I found that the results weren’t immediate and it took a few days to see results.
  • I found that it doesn’t work outdoors.

2) BugZappa:



This mosquito killer is similar to other UV products in that the UV light attracts the mosquitos, and an electrical current then kills them.

You’ve probably seen these in commercial kitchens, restaurants, butchers etc because they work very well and if a mosquito enters the area, it will be attracted to the UV light and then killed.

I previously owned one of these at my previous property that was plagued by mosquitos and it certainly helped but only in specific cases.

I recommend UV mosquito killers for porches, balconies, patio areas and in areas where food is prepared.


  • They are very effective, hence why they are found in places where food is prepared.
  • They are even more effective if the light is brighter than any other light in the area.
  • Reasonably priced and last for years.
  • Can be used outdoors.


  • The dead mosquitos collect in the tray which needs to be emptied out – something I found quite disgusting!
  • The lead is short and you’ll need to use an extension lead on porches or outside.
  • If used outdoors,  they will attract mosquitos and you’ll be surprised how many collect in the tray – often hundreds but sometimes thousands.

My Experience with UV Lights

I owned one of these lamps and used it during the summer and autumn at my previous property.

It did attract mosquitos that might otherwise have stayed away from the property but it also killed them instantly.

It took a little trial and error to find the best location so the attracted mosquitos weren’t a nuisance.

I found that placing it near an artificial light source delivered the best results.

3) Neem Oil:

Neem oilspray


Neem oil has been used in India for hundreds of years and is an effective mosquito deterrent that can be applied to the skin and most plants.

The neem seeds are ground into a powder and then soaked with water; the resulting compound can be sprayed onto plants every week or so to deter many pests including mosquitoes.

The neem liquid is also an egg-laying deterrent and once consumed by mosquitoes, it disrupts their digestive system and stops them from consuming any more food, they then die.

Neem is widely used on organic crops as an alternative to pesticides (source) and is an effective mosquito killer.

Neem oil is sold in the UK in various forms from skin creams, ready-to-use garden sprayers to pure compounds that you’ll need to dilute yourself.

The Trees website has a great guide to creating your own Neem oil bug repellent here; it’s well worth exploring if you want to go down the DIY route.


  • Natural product.
  • Bee-friendly.
  • Used widely in India.
  • Spray onto plants, flowers, crops etc in the garden.
  • Affordable, especially if you create your own DIY product.


  • Not as effective as chemical pesticides.
  • Limited number of products on sale with most users creating their own DIY product by diluting pure neem oil and buying a sprayer.
  • Needs to be reapplied after rain and at least once per week.

4) Mosquito Killer Dunks:

Mosquito water dunks


Standing water can contain many thousands of mosquito larvae and once these menaces take flight, you’ll be their first meal.

Mosquito killer dunks contain a bacteria that’s fatal to mosquito larvae and young mosquitoes but safe for all other animals, including fish, bees and pets.

Place these dunks anywhere there is standing water where mosquito larvae may be present; garden water features, ponds, rain barrels, gutters, bird drinking tables etc.

Each pack contains six dunks, and each one covers up to 100 sq feet of water. You can even break each dunk into pieces to treat smaller areas too.

Expect each dunk to last around a month, but you won’t need to use them all year, only during mosquito peak season.

These dunks are certified for organic use in the USA and have excellent reviews on Amazon, well over 12000 positive reviews so far.


  • Very effective.
  • Kills of larvae and young mosquitoes before they are old enough to bite.
  • Safe for all other animals, pets and humans etc.
  • Long-lasting effect, up to 30 days per dunk.


  • Will reduce mosquitoes from the water on your property but unless you can convince surrounding landowners to use them, their overall effectiveness may be limited (depending on the size of your land).

My Experience of Mosquito Dunks

At my previous property, we were inundated with mosquitos in the summer and autumn and so were the neighbours.

One neighbour, who owned a pond. told me that the mosquitos used his pond for breeding and it was often covered in larvae. He used the dunks and it killed off the larvae but as there was a public pond, ditch and lake nearby, it didn’t noticeably reduce the number of mosquitos in our gardens.

Will it work for you?

That depends on the size of your garden and where the mosquitos are breeding and where you are able to use these dunks – they do work but only if you have access to the water.


How many times can a mosquito bite?

There’s no limit to how many times a mosquito can bite a human. The mosquito will consume blood until full, this can be from one victim or many.

Are there any natural ways to deter mosquitoes?

Mosquitoes follow the odour from their victim’s breath and eating garlic can deter them. There are many scents that can deter mosquitoes with lavender, cinnamon oil, thyme oil and lemon eucalyptus oil being the most effective. 

Why do mosquitoes bite?

The mosquito releases a blood coagulant into the wound, this makes it easier for the mosquito to withdrawal the blood and prevents the victim from feeding the wound so the activity goes undetected.

Do all mosquitoes bite?

Only female mosquitoes bite, they require the blood for reproduction. Male mosquitoes do need blood so they don’t bite.

What time of year do mosquitoes bite?

In the UK, mosquitoes are usually seen in summer and autumn. In winter and early spring, the evening and nighttime temperatures are too low for them to survive.

Meet The Author: Hannah Miller

Hannah is a former NHS administrator, mother of two and keen gardener with a horticulture qualification who loves growing new plants and experimenting in the garden.

She enjoys gardening as much as she cares about the environment and likes to share her knowledge with others.

This year is all about pollinators, and Hannah has set herself the goal of only buying new plants that attract pollinators; she aims to make the garden as bee and butterfly friendly as possible.

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