Repellents tested
Best Mosquito Sprays and Repellents: What Actually Works
A plain assessment of what is on the shelf: which actives hold up on skin, which natural options have something behind them, what coils and zappers really do, and where a barrier treatment fits.
Two different jobs. One protects your skin, the other reduces the mosquitoes around it.
Asking which is the best bug spray for mosquitoes gets you a shelf of bottles shouting about strength, nature and family safety, and almost none of that wording means anything. Two things decide whether a repellent works: the active ingredient in it, and whether you put it on every piece of skin a mosquito can reach. Everything else on the label is design.
This page sorts the products into what they can physically do. Skin repellents, coils, candles, plug-ins, zappers, fans, misting kits and professional barrier treatments all get a fair hearing, including the ones that turn out to be a waste of money. Nothing here is a brand recommendation, because the active and the concentration tell you more than the name on the front does.
The page belongs with Tim's other written guides for households, and it leans on Victorian health advice for anything that touches skin or health. One rule up front: never put a human repellent on a cat, a dog or any other animal. Ask the vet instead.
What works
Which is the best bug spray for mosquitoes on skin?
Any product whose listed active is picaridin or DEET, spread evenly over every patch of skin left uncovered. Victorian health advice names both for use on exposed skin, and they are the two with the longest track record behind them. The concentration mainly decides how many hours you get, not how well it works while it is on.
That last point saves people money. A higher percentage buys duration rather than a stronger shield, so a low-concentration product reapplied on schedule protects you as well as a high-concentration one left on all evening. For two hours on a deck after dinner, a modest product is plenty. For a long day fishing or camping, the longer-lasting version earns its price.
Close to odourless, kinder on plastics and synthetic fabrics, and comfortable on skin. The usual first choice for everyday use in a Melbourne backyard.
The longest record of the two and effective at modest concentrations. It can soften some plastics, so keep it off watch faces, sunglasses, phone screens and fishing gear.
Lotion and roll-on give the most even coverage, which is what actually matters. A pump spray is faster and misses more, particularly around ankles.
Easy to apply too thinly and easy to inhale. Spray into your hands and wipe it on instead, and never spray at a face.
Application is where most failures happen, and they are predictable. Skin just above a sock, the nape under long hair, the hollow behind each ear, bare feet in sandals and the band of lower back that appears when you lean over a barbecue are skipped almost every time. Mosquitoes find bare skin with no effort at all, so a near-complete application performs like no application at the spot you skipped.
- Sunscreen first, repellent second. Let the sunscreen settle, then apply the repellent over it. The other order rubs the repellent off.
- Thin and even beats thick and patchy. Spread it with your hands rather than trusting a spray pattern.
- Reapply after swimming or heavy sweat, and on a humid Melbourne evening that comes around sooner than the label suggests.
- Treat clothing as cover, not protection, because a mosquito will bite through fabric stretched tight across a shoulder or a knee.
Never use a human repellent on an animal. Cats in particular handle some compounds differently from people, and nothing on this page is dosed for a body that size. Mosquito protection for a dog, including heartworm prevention, is a veterinary question with a veterinary answer.
Rated honestly
Do the natural mosquito repellents work?
One has real evidence and the rest are short-lived or decorative. Oil of lemon eucalyptus, sold as a refined extract rather than as a raw essential oil, performs respectably and needs more frequent reapplication. Citronella oil on skin fades fast. Wristbands, patches, clip-on fans and phone apps do not protect skin at all.
The honest framing is that natural and synthetic is the wrong axis. The right question is whether a product was formulated and tested to sit on skin and keep working for a stated number of hours. A refined plant extract that has been through that process can do the job. A hardware store essential oil decanted into a spray bottle has not been through any of it, and it evaporates within minutes.
| Option | What it does | Verdict |
|---|---|---|
| Refined oil of lemon eucalyptus | Genuine repellency, shorter duration than picaridin | A fair choice if reapplied often |
| Raw essential oils on skin | Smell strongly, evaporate within minutes | Not a repellent in any useful sense |
| Citronella oil products | Mild and short-lived on skin | Weak, and often mistaken for the plant |
| Wristbands and patches | Release near one point, leave the rest of you bare | No |
| Clip-on battery devices | Only do anything at close quarters with the air completely still | Marginal indoors, useless outdoors |
| Ultrasonic apps and gadgets | Produce a tone and no measurable effect | A myth worth no money at all |
- Repellent
- A product that makes treated skin unattractive or hard to detect, so a mosquito does not land. It does not kill anything and it does not reduce the number of mosquitoes present, which is why a repellent and a treatment solve different problems.
Duration is the other thing the natural category tends to be quiet about. A product that genuinely repels for forty minutes is not a bad product, but it has to be treated as a forty minute product, which means reapplying it three times across an evening on the deck. People who apply it once at six o'clock and get bitten at eight conclude that it failed, when what failed was the schedule.
Skin sensitivity is a real consideration with every option here, natural ones included. Patch test on a small area if you have reactive skin or eczema, keep anything repellent away from broken skin and eyes, and wash it off when you come inside for the night rather than sleeping in it.
Is a stronger concentration always better?
No. With the common actives, a higher percentage extends the hours of protection rather than improving it, and there is a point past which the extra adds very little. Pick the concentration to suit how long you will be outside, and reapply on time instead of buying the strongest bottle on the shelf.
Space products
What about coils, candles, plug-ins and zappers?
Plug-in vaporisers work in a sheltered, enclosed space. Coils and candles manage a small bubble of still air. Zappers kill the wrong insects entirely. None of them reduce the mosquito population on a block, because none of them touch the water the mosquitoes came out of.
Think of these as space products rather than area control. They try to make a small volume of air unpleasant, which works only where that air stays put. On a sheltered verandah with three sides, a plug-in vaporiser does a decent job and Victorian health advice supports using one in an enclosed outdoor area, switched off once everybody has gone inside. Put the same device on an open lawn and the evening breeze takes it away.
Moving air defeats a weak flier and scatters the plume of breath they home in on. Cheap to run, silent competitors do not exist.
Good in an enclosed alfresco area, pointless in open air. Switch it off when the space is empty.
Light attracts moths and beetles, not mosquitoes, which hunt by breath and warmth. It kills harmless insects and draws attention to where you sit.
Knockdown sprays have a narrow but real use indoors. If a mosquito is in the bedroom at eleven at night, a short burst of a household insect spray in a closed room deals with the individual in front of you. That is all it does. There is no residue worth counting on afterwards, so it solves tonight rather than this week.
Candles and coils are worth one more sentence because of how they are used. People light them, put them on the table, and then sit a metre and a half away in a breeze. Even at their best they manage a small volume of still air immediately around the flame, so the only way to get anything out of one is to have several of them close in and no wind at all, which describes almost no Melbourne evening.
Misting systems, the kind plumbed around a pergola on a timer, come up occasionally for outdoor venues. They are expensive, they apply product on a schedule rather than when it is needed, and in a residential setting they usually drift onto vegetable beds, play equipment and the neighbour's side of the fence. Every product involved still has to be used exactly as its label allows.
The measure that separates them all. Ask whether a product protects a person, reduces a population or does neither. Repellent protects a person. Removing water reduces a population. A residual on resting foliage reduces a population inside a zone. Coils, candles and zappers do neither in any meaningful amount.
Nothing you buy in a bottle beats an hour spent tipping out everything on the block that holds water.
Safety
What is safe for children, pregnancy and people with sensitive skin?
The label decides, and it is the first thing to read rather than the last. Repellents carry minimum ages and directions for use on children, lower concentrations exist for young skin, and the application method changes: you put it on your own hands and then onto the child, never spraying towards a face.
- Check the age on the labelRegistered products state who they may be used on. If it does not say, ask a pharmacist before using it on a child.
- Apply it yourselfInto your hands, then onto the child. Avoid hands, mouths, eyes and any broken or irritated skin.
- Cover instead where you canLong loose sleeves, long trousers and a net over a pram remove most of the exposed skin before any product is needed.
- Wash it off indoorsOnce everyone is inside for the night, soap and water. There is no reason to sleep in it.
Pregnancy and existing medical conditions are a pharmacist or GP question rather than a pest control one, and that is not a dodge. A pharmacist can see what else somebody is taking, which is exactly the information that decides these choices. The same goes for anyone with eczema, asthma or a history of skin reactions.
Household members who cannot use a repellent comfortably are the strongest argument for fixing the yard instead. If a child reacts to everything on the shelf, the useful move is to remove the mosquitoes rather than to keep experimenting with bottles. That is where the water audit and the screens earn their keep.
Fish, frogs, chooks, birds and vegetable gardens all matter when anything is applied outdoors rather than to skin. Every product used professionally is on the national register and comes with label directions covering the rate, which surfaces it may touch and where it must not go, fish ponds among them. Say what is in the yard before a treatment is planned, not on the day.
Bite care itself belongs elsewhere. What settles an itch, how long a mark should last and when to see a doctor are covered in Tim's notes on relief and prevention for mosquito bites.
The limit
When does a product stop being the answer?
When you are reaching for a repellent every single evening in your own backyard. At that point you are paying to tolerate a population rather than reduce it, and the fix is water removal plus a residual on the shaded foliage and structure the adults rest in through the day.
- Nightly repellent at home. Fine on a camping trip. On your own deck it means the source has never been dealt with.
- A heavily planted block. Deep shade, thick hedges and ivy give adults a permanent place to sit out the day a few metres from your table.
- Children who cannot use repellent. Reducing the number of mosquitoes beats working through products one by one.
- A date in the diary. An outdoor function needs the water cleared first and the treatment done several days ahead, not on the morning.
What a technician adds is placement and persistence rather than a secret product. The residual goes onto the undersides of dense leaves, shaded fence and wall lines, under decking and inside carports, at the rate the label sets, and it keeps working for a number of weeks. Heavy rain, daily irrigation, full sun and a hard prune all shorten it, which is why a block under genuine pressure gets treated more than once across a summer.
The honest limits stay the same whoever does the work. A treatment stops at your boundary, so a neighbour's unmaintained pool or unscreened tank keeps sending arrivals over the fence, and a property backing onto wetland is dealing with a source nobody owns. What is achievable is a usable outdoor area, not a sterile suburb.
One technician, one van, one licence number. Tim covers Melbourne and its surrounding suburbs by himself, carries full insurance, holds Victorian licence No. 86488, and puts a three month re-treatment guarantee over the zone he has treated. The scope of a visit and how it is timed are set out on the page for mosquito treatment across Melbourne, and the full property walk is in the guide to getting mosquitoes out of a backyard.
For a price, send the area size, the amount of dense planting, the water on the block and any date you are working towards through the quote request. One figure comes back for you to approve before anything is arranged.
Questions
Repellent questions Tim gets asked
What is the best mosquito repellent to buy?
One with picaridin or DEET listed as the active ingredient, matched to how long you will be outside. Victorian health advice names both for exposed skin. Picaridin is close to odourless and easier on plastics; DEET has the longer record. Brand matters far less than the active and the coverage.
Do natural repellents work at all?
Refined oil of lemon eucalyptus does, with more frequent reapplication than the common actives need. Raw essential oils tipped into a spray bottle evaporate within minutes and protect almost nothing. Wristbands, patches and ultrasonic gadgets do not protect skin in any measurable way.
Is repellent safe for kids?
Products state a minimum age and directions for children on the label, which is the first thing to check. Choose the weaker version if the range offers one, put the product onto your own palms before it touches the child, stay away from fingers and faces, and rinse it off once the evening is over. Ask a pharmacist if unsure.
Do bug zappers get rid of mosquitoes?
No. What draws a mosquito is exhaled breath, warmth and odour. Light does not come into it, so a light trap fills up with moths, beetles and other harmless night insects. Hanging one near a seating area also puts a bright light exactly where you did not want one.
Does a fan really help?
Yes, more than most products do. Mosquitoes are weak fliers and they follow a plume of breath and body odour drifting downwind. Moving air breaks that plume up and makes landing difficult, which is why a table under a running fan is noticeably quieter than one beside it.
Can you spray the yard so we do not need repellent?
A treated yard with its water sorted out usually becomes comfortable enough to sit in without reaching for a bottle every evening. It is not absolute, it lasts weeks rather than a season, and arrivals from a neighbouring property or a reserve still cross the fence. Keep a repellent for the edges of the season.
Spent a fortune on repellents and still eaten alive?
Describe the yard, where you sit and what time the biting starts, and Tim will tell you whether this is a product problem or a water problem.
Reviewed October 2026 by Tim, licensed pest control operator (Victorian licence No. 86488). Repellent actives, indoor knockdown sprays, vaporisers and home protection: Better Health Channel. Registration and label directions for every product applied: APVMA. Product choices for children, pregnancy or existing conditions belong with a pharmacist or doctor.