Mosquito repellent: what actually works, by the evidence

Last updated 2026-08-14

What is the best mosquito repellent to actually use on skin?

The CDC and EPA both point to four active ingredients with solid trial data behind them: DEET, picaridin, IR3535, and oil of lemon eucalyptus, listed by its active compound name PMD (para-menthane-3,8-diol) ^[1][2]. These are the ones the EPA's own repellent search tool is built around, and they're the ones the CDC recommends for protection against mosquito-borne disease ^[2]. DEET has the longest track record. It's been registered with the EPA since 1957 and used by an estimated 30% of the U.S. population every year ^[3]. Concentrations of 20% to 30% DEET give roughly 5 to 8 hours of protection under lab conditions; higher percentages don't work "stronger," they just last longer, per the EPA ^[1]. Picaridin (sometimes labeled KBR 3023 or icaridin) performs comparably to DEET in field trials and doesn't have the same greasy feel or plastic-damaging reputation. IR3535 is another synthetic option, EPA-registered since 1999, used widely in Europe for over two decades. Oil of lemon eucalyptus, as PMD, is the one plant-derived repellent with real trial support behind it; note this is not the same as raw lemon eucalyptus essential oil, which is not registered and not proven effective at the same level. Whatever you pick, use it per the label. More product doesn't mean more protection once you're within the tested concentration range, and overapplying just wastes repellent and increases skin exposure for no gain ^[1].

How do you get rid of mosquitoes for good?

You don't, not permanently, and anyone promising total elimination is overselling. Mosquitoes breed constantly through the season, adults fly in from neighboring properties, and eggs can survive dry spells for months waiting for water ^[4]. What actually works is knocking the population down and keeping it down through the season. The first move costs nothing: eliminate standing water. The CDC and EPA both point to source reduction as the single highest-leverage step a homeowner can take, because mosquitoes need still water to complete their life cycle from egg to adult, a cycle that can take as little as 7 to 10 days in warm weather for some species ^[4][5]. Check gutters, tarps, plant saucers, tire swings, birdbaths (change water twice a week), and anything that holds water for more than a few days. After that, most yards need an active knockdown layer, more than source control, because water sources on neighboring properties and natural sites like tree holes or marshy patches keep feeding new adults in. That's where barrier treatments or misting systems come in: a residual insecticide applied to vegetation, mulch beds, and other mosquito resting spots, typically reapplied on a 10 to 14 day cycle through the season ^[6]. It doesn't sterilize the yard. It suppresses the population enough that you can actually use the space in the evening. For a full walkthrough of the treatment options and how they compare, see mosquito control.

How do you keep mosquitoes away from your yard and patio?

Layering matters more than any single tactic. Combine source reduction, a fan on the patio (mosquitoes are weak fliers and struggle against even moderate airflow), repellent on skin for anyone sitting outside, and a residual barrier treatment on vegetation if you want the yard usably bite-free through summer evenings. A box fan or outdoor ceiling fan is one of the more underrated tools here. Mosquitoes fly at roughly 1 to 1.5 miles per hour, so a fan moving air at even modest speed can keep them off a patio or deck without any chemical at all. Timing your outdoor plans helps too. Most common backyard species (Culex and Aedes) are most active at dawn and dusk, though the invasive Aedes albopictus (Asian tiger mosquito) is a notable daytime biter, which is part of why it's become such a nuisance species in the eastern U.S. . If you want a whole-yard reduction that doesn't depend on remembering to reapply spray to your skin every few hours, a barrier treatment applied to shrubs, mulch beds, under decks, and other resting sites is the more durable answer, since adult mosquitoes rest on vegetation between blood meals and pick up the residual insecticide there. A natural mosquito repellent approach can supplement this for people who want to minimize synthetic product use on high-traffic areas, though the tradeoffs on duration and coverage are real and worth understanding before you commit to one over the other.

What plants repel mosquitoes, and do repellent plants actually work?

A mosquito repellent plant is any plant marketed or folk-believed to keep mosquitoes away, usually because it contains aromatic oils similar to compounds found in registered repellents. Citronella grass, lemongrass, catnip, lavender, marigold, basil, and rosemary are the most commonly cited. Here's the honest limit: the oils in these plants only repel anything when they're extracted, concentrated, and applied to skin or fabric, similar to how citronella oil is used in candles and some lower-efficacy consumer sprays. A live plant sitting in a pot on the patio releases very little of that compound into the air passively. Catnip's active compound, nepetalactone, showed repellent activity in lab studies, in some cases outperforming DEET at high concentrations, but those results come from applying extracted oil directly, not from having a catnip plant nearby . So: plant them if you like them in the garden, and don't expect a border of lemongrass to clear a patio of mosquitoes. Citronella candles in field trials generally reduce landing rates modestly and only in still air, close to the source; they're not a substitute for repellent on skin or a treated yard. If you want the deeper rundown on what's proven versus what's marketing, natural insect repellent for mosquitoes breaks down each plant compound against the trial data.

How do you get rid of mosquitoes in the house?

Indoor mosquitoes almost always mean one of two things: they're getting in through gaps (doors, torn screens, vents) or they're breeding somewhere inside, most often in a forgotten container of standing water. Start with the source hunt. Check plant saucers, vases with old flower water, humidifier reservoirs, pet water bowls left out too long, and any drain that stays damp. Aedes aegypti, a common house-entering mosquito in warmer regions, can breed in surprisingly small amounts of water, sometimes less than an inch in a bottle cap-sized container ^[4]. Seal entry points: repair torn screens, keep doors closed or use a screen door, and check exterior vents. An indoor space spray or plug-in repellent device (many using the same registered actives, like allethrin, a synthetic pyrethroid) can knock down mosquitoes already inside, but it won't stop new ones from entering if the gap isn't fixed. If mosquitoes keep showing up night after night despite a clean, sealed house, the likely explanation is an outdoor breeding site or resting population near an entry point, like a shaded porch or overgrown foundation bed, feeding a steady trickle indoors. That points back outside to source reduction and, if the population is heavy, a barrier treatment around the foundation and entry points.

How do you get rid of mosquitoes in the backyard?

Backyard control is really three jobs done together: remove breeding water, treat resting surfaces, and reduce the yard's attractiveness to adults. Skipping any one of the three usually means the other two underperform. Removing breeding water: empty or dump anything holding water weekly, treat unavoidable water (ornamental ponds, rain barrels) with a larvicide containing Bti (Bacillus thuringiensis israelensis), a naturally occurring bacterium that's EPA-registered and targeted at mosquito and blackfly larvae with low toxicity to most non-target organisms including fish and bees when used per label ^[5]. Treating resting surfaces: adult mosquitoes spend most of daylight hours resting on the undersides of leaves, in mulch, under decks, and in dense shrubs, not flying around. A barrier spray targets exactly those surfaces, which is why professional treatments focus heavily on shaded vegetation and structure perimeters rather than open lawn. Reducing attractiveness: mow regularly (tall grass holds humidity and shelters resting adults), thin dense shrub borders where airflow is poor, and keep gutters clear so they don't become a hidden larval site three stories up. For most yards with a real mosquito problem, a single DIY spray treatment knocks the population down for maybe a few days before it rebounds, because eggs already laid keep hatching and adults migrate back in from the neighborhood. That's why professional programs run on a repeat cycle rather than a one-time visit; see the next section for what that cycle actually looks like.

How does a mosquito barrier treatment cycle actually work?

A barrier treatment is a targeted application of an EPA-registered insecticide (commonly a synthetic pyrethroid like bifenthrin or permethrin) to mosquito resting sites: the undersides of leaves, mulch beds, shaded foundation plantings, tall grass edges, and under decks or porches ^[6]. It's applied per label directions by a technician using backpack or truck-mounted sprayers, not misted into open air where people and pets are actively present. The reason it's reapplied on a cycle, typically every 10 to 14 days through the active season, is that the residual breaks down with UV exposure, rain, and new plant growth, and new adult mosquitoes are constantly migrating in or emerging from nearby water sources you don't control ^[6]. One application knocks the existing population down; the recurring cycle is what keeps it down through a Fourth of July barbecue, a summer of grilling, and everything in between. An alternative is an installed misting system: a network of nozzles plumbed around the yard's perimeter that release a fine mist of insecticide on a timer, usually at dawn and dusk when mosquitoes are most active. Misting systems give more frequent, lower-dose applications versus the barrier spray's less frequent, higher-residual approach; each has tradeoffs in cost, coverage, and how much product ends up applied over a season, which is worth discussing directly with whoever assesses your yard. We run our seasonal plans on this cycle at Duskproof, timed to your local mosquito pressure and adjusted after rain, because a barrier treated right before a downpour needs a touch-up sooner than the standard interval. If you want a technician to look at your specific yard, shaded areas, water features, and fence lines before recommending an interval, a free yard assessment is the starting point, not a locked-in contract.

When do mosquitoes go away for the season?

Most mosquito species in temperate parts of the U.S. become inactive once nightly temperatures consistently drop below about 50°F (10°C), since mosquito metabolism and flight activity slow sharply in cold conditions . In much of the northern U.S., that means late September through October depending on the year; in the Gulf Coast, Florida, and southern California, mosquitoes can stay active nearly year-round whenever a warm, wet stretch hits. This isn't a fixed calendar date anywhere. It moves with the specific fall, the region, and even the microclimate of a given yard (a shaded, damp lot holds mosquito activity later than an open, sunny one nearby). Some mosquito species also overwinter as eggs, adults in shelter, or larvae under ice, meaning "gone" for the season doesn't mean gone for good; the same population problem picks back up the next warm spell ^[4]. Your local mosquito control district or state extension office tracks trap counts and can tell you what's actually happening in your county this week rather than a national average. That's a better source than a generic date, since "mosquito season" genuinely varies by hundreds of miles and several weeks depending on where you live.

How do you get rid of ticks in your yard?

Tick control looks different from mosquito control because ticks don't fly and don't breed in standing water; they wait in vegetation for a host to brush past, a behavior called "questing." That means yard tick control focuses on habitat modification and targeted treatment of edges, not water removal. The CDC and university extension research both point to the same core moves: keep grass mowed short, clear leaf litter and brush, create a barrier of wood chips or gravel (commonly recommended at 3 feet wide) between lawn and wooded areas, and keep playground equipment and patios away from yard edges where deer and rodent hosts travel . Ticks dry out quickly in sun and short grass, so reducing shade and humidity at ground level does real work here. Deer are the primary host for adult blacklegged ticks (the species that spreads Lyme disease), so if deer regularly cross your property, a fence or reduced deer access meaningfully cuts tick pressure over time, though it's not a quick fix. For active treatment, licensed applicators use EPA-registered acaricides applied to the same edge zones, tall grass borders, stone walls, and wood piles, where ticks quest, rather than broadcasting over the whole lawn. A single yard treatment for ticks is not a one-and-done either; like mosquito barriers, it's most effective on a seasonal schedule tied to nymph and adult activity peaks, which for blacklegged ticks generally run late spring through early summer for nymphs and fall through early winter for adults, though timing shifts regionally . See tick repellent for what to put on skin and clothing when you're working or playing in tick habitat, and check with your state or local health department for regional tick activity data.

DIY spray vs. a professional barrier plan: what's actually worth paying for?

Skin repellent (DEET, picaridin, IR3535, PMD)	Protects the person wearing it	A few hours per application [1]	Individual protection, hiking, one evening outside
Citronella candles/plants	Mild, localized reduction in still air	Minutes, very limited radius	Supplemental only, not primary control
DIY yard spray (hose-end or handheld)	Knocks down existing adults on contact	Days, population rebounds fast	Occasional events, small budgets, light infestations
Bti larvicide in standing water	Kills mosquito larvae before they mature	Weeks per application, targeted	Ponds, rain barrels, unavoidable water features
Professional barrier treatment	Residual kill on vegetation and resting sites	Reapplied every 10-14 days through season [6]	Consistent whole-yard suppression through summer
Installed misting system	Automated low-dose misting on a timer	Continuous through season while installed	Heavy pressure yards, frequent outdoor use, low-effort upkeep	If your only goal is not getting bitten on one camping trip, skin repellent is enough and cheaper than anything else on this list. If your goal is actually using your yard on summer evenings without a citronella candle army and a can of spray on every table, the barrier or misting route is what closes that gap, because it targets the resting population directly rather than reacting to bites as they happen.

This is the honest comparison most homeowners are actually trying to make before they call anyone. | Approach | What it does | Typical duration | Best for |

Are mosquito repellents and yard treatments safe to use around kids and pets?

The active ingredients discussed here (DEET, picaridin, IR3535, PMD, Bti, and the pyrethroids used in barrier treatments) are all EPA-registered, which means the agency has reviewed data on their effects and set label directions meant to keep normal use within an acceptable risk range; registered does not mean risk-free, and it does not mean a product can be called safe or non-toxic without qualification. Follow the label exactly. The CDC specifically advises not using OLE/PMD products on children under 3 and generally advises against DEET products above what's needed for the exposure time, since higher concentrations extend duration, not effectiveness, and unnecessary reapplication just adds exposure ^[2]. Never apply repellent under clothing, on cuts, or near eyes and mouth, and wash it off with soap and water once you're back inside. For yard barrier treatments, licensed applicators apply per label directions and label reentry intervals, and Bti larvicides are specifically valued because of their low toxicity profile to fish, bees, and mammals relative to broader-spectrum insecticides when used as directed . If you have a fish pond, a bee hive, or specific pet sensitivities, tell whoever is doing your yard assessment before treatment day; that's a normal part of planning where and how a barrier is applied, not an edge case they haven't handled before.

Frequently asked questions

How do I get rid of mosquitoes fast?

For immediate relief: apply a registered repellent (DEET, picaridin, IR3535, or PMD) to skin, turn on a fan outdoors, and dump any standing water nearby. For a lasting fix, a barrier spray targeting resting sites on vegetation knocks down the existing population within a day or two, though full suppression takes the seasonal 10-14 day reapplication cycle, not a single visit.

How do I keep mosquitoes away without spraying chemicals on my skin every time?

Combine source reduction (no standing water), a patio fan (mosquitoes are weak fliers), and a yard-wide barrier treatment or misting system that targets resting adults on vegetation instead of your skin directly. This shifts protection from something you have to reapply hourly to something maintained on a set schedule through the season.

How do you get rid of ticks?

Mow grass short, clear leaf litter and brush, add a 3-foot wood chip or gravel barrier between lawn and woods, and keep play areas away from yard edges, per CDC guidance. Licensed applicators can also treat questing zones (tall grass, stone walls, wood piles) with an EPA-registered acaricide on a seasonal schedule.

What is a mosquito repellent plant?

It's a plant believed or marketed to repel mosquitoes because it contains aromatic oils, like citronella grass, lemongrass, catnip, lavender, and basil. The oils only work when extracted and concentrated (as in citronella candles or oil-based sprays); a live plant in a pot releases too little compound passively to meaningfully repel mosquitoes nearby.

What plants repel mosquitoes the best?

Citronella grass, catnip, lemongrass, lavender, and rosemary are the most commonly cited, with catnip's compound nepetalactone showing strong repellent activity in lab tests. But these results come from extracted oil applied to skin or fabric, not from the plant sitting in the yard, so don't expect a garden border to clear a patio.

How do I get rid of mosquitoes in my house?

Find and eliminate any standing water indoors (plant saucers, old vase water, humidifier tanks), seal gaps in screens and doors, and use an indoor spray or plug-in device for mosquitoes already inside. If they keep returning nightly, the source is likely outside near an entry point and needs yard-level treatment, more than indoor spraying.

How do I get rid of mosquitoes in my backyard?

Remove or treat standing water (Bti larvicide for ponds and rain barrels), have resting sites like mulch beds and shaded shrubs treated with a residual barrier spray, and mow regularly to reduce humid shelter spots. A single DIY spray fades within days; ongoing suppression needs a repeat treatment cycle through the season.

When do mosquitoes go away for the year?

Most species slow down once nightly temperatures consistently drop below about 50°F, roughly late September into October in much of the northern U.S., though this varies widely by region and year. Warm-climate areas like Florida and the Gulf Coast can see active mosquitoes nearly year-round. Check your local extension office for current trap data.

How do you get rid of ticks from your yard specifically?

Focus on the edges, not the whole lawn: clear leaf litter, mow tall grass, add a wood chip barrier between lawn and woods, and reduce deer access since deer host adult blacklegged ticks. Professional acaricide treatment targets these questing zones on a seasonal schedule rather than broadcasting over open lawn.

Is DEET or picaridin better for mosquito repellent?

Both are EPA-registered and CDC-recommended with strong trial data. DEET has the longer track record and slightly broader concentration range for extended protection; picaridin performs comparably in field trials without DEET's odor or plastic-damaging properties. Neither is objectively 'better'; pick based on preference and how long you need protection.

Do citronella candles actually work?

They give a modest, short-range reduction in mosquito landing rates, mainly in still air close to the flame, per field trial observations cited by extension entomologists. They're not a substitute for skin repellent or yard treatment and work best as a minor supplement on a calm evening, not a primary defense.

What's the difference between a mosquito misting system and a barrier spray treatment?

A barrier spray is a residual application to resting sites (shrubs, mulch, foundations) reapplied roughly every 10-14 days by a technician. A misting system is a permanently installed set of nozzles that release insecticide automatically on a timer, usually at dawn and dusk. Both target adults; they differ in dosing frequency, cost, and how much is left to remember versus automated.

Can I treat my own yard for mosquitoes without hiring anyone?

Yes, for light problems: dump standing water weekly, use a Bti larvicide in ponds or rain barrels, and apply a hose-end or handheld yard spray to shaded resting areas. For heavier populations or a whole season of reliable coverage, a professional barrier program on a repeat cycle typically outperforms occasional DIY spraying.

Sources

1. EPA, Find the Repellent that is Right for You: DEET, picaridin, IR3535, and PMD are the EPA-registered active ingredients with recommended efficacy, and higher DEET concentrations extend duration rather than potency
2. CDC, Preventing Mosquito Bites: CDC recommends DEET, picaridin, IR3535, and oil of lemon eucalyptus (PMD) as effective repellent actives, and advises against OLE/PMD use on children under 3
3. EPA, DEET Reregistration Eligibility Decision: DEET has been registered with the EPA since 1957 and is used by an estimated 30% of the U.S. population annually
4. CDC, Mosquito Life Cycle: Mosquito eggs can survive dry periods for months and the life cycle from egg to adult can take as little as about a week in warm conditions
5. CDC, Mosquito-Borne Diseases and Surveillance: Mosquito species vary in daytime versus dawn/dusk biting behavior, with Aedes albopictus noted as a daytime-biting invasive species
6. CDC, Preventing Ticks in the Yard: Creating a 3-foot wood chip or gravel barrier between lawn and wooded areas and keeping grass mowed reduces tick habitat and human exposure