Best mosquito repellent: what actually works, per the CDC

Last updated 2026-08-14

What is the best mosquito repellent you can buy?

DEET	20-30%	5-8 hours
Picaridin	20%	5-8 hours
IR3535	20%	up to 8 hours
Oil of lemon eucalyptus (PMD)	30-40%	up to 6 hours
2-undecanone	7-8%	several hours, less data than others	None of this is eradication. A repellent on your skin stops bites on you; it does nothing to the mosquito population breeding two yards over. For that you need source reduction and, if the pressure is bad, a mosquito control plan for the property itself.

For skin application, the CDC and EPA point to five active ingredients with real efficacy data: DEET, picaridin, IR3535, oil of lemon eucalyptus (OLE, the synthesized version is para-menthane-diol or PMD), and 2-undecanone ^[1]. If a product doesn't list one of these on the label, treat the marketing claims with suspicion no matter how good the reviews look. DEET remains the benchmark. A study published by the New England Journal of Medicine in 2002 tested repellents against Aedes aegypti and found 23.8% DEET gave about 301 minutes of protection, while a citronella-based product gave about 20 minutes ^[2]. That's not a small gap. It's the difference between one evening on the patio and needing to reapply before you've finished your drink. Picaridin (also called icaridin) at 20% concentration performs close to DEET in field trials and doesn't have the plastic-melting, fabric-damaging downside DEET has. It's odorless to most people and the EPA's registration data supports use on skin and clothing ^[3]. If you dislike the feel or smell of DEET, 20% picaridin is the one to buy instead, not a step down. Here's a rough comparison of protection times reported across CDC-cited studies and EPA registration data. These are typical ranges, not guarantees, because protection time depends on sweat, water exposure, temperature, and species of mosquito. | Active ingredient | Typical concentration | Reported protection time |

Does DEET actually work, and is it safe?

Yes, DEET works, and it has the longest safety record of any repellent active ingredient in the U.S. It was developed by the U.S. Army in 1946 and registered for public use in 1957 ^[4]. The CDC states plainly that "EPA-registered insect repellents are proven safe and effective, even for pregnant and breastfeeding women, when used as directed on the product label" ^[1]. Note the qualifier: as directed on the label. That's the whole game with any pesticide claim, and it's why nobody honest calls a repellent categorically "safe" without that condition attached. Higher concentrations of DEET don't make it work better, they make it last longer. The American Academy of Pediatrics and CDC guidance both note that concentrations above about 30% don't add meaningful extra protection time, they just extend the plateau ^[1]. For a day hike, 30% DEET makes sense. For a two-hour dinner on the deck, 10% is plenty. DEET can degrade some plastics, synthetics, and painted surfaces, so don't spray it on sunglasses or fishing line. It also should not be applied under clothing, on cuts, or near the eyes and mouth. The label will say all of this; read it once and you're set for the summer. For infants, the CDC and AAP recommend against any repellent use under 2 months of age, full stop, with physical barriers (mesh netting over a stroller or carrier) as the alternative ^[1].

How do you get rid of mosquitoes in your backyard?

You get rid of most of them, not all of them, by combining source reduction with a barrier treatment, and you keep it up on a schedule instead of doing it once. There's no single spray or trap that solves a bad yard by itself. Start with standing water. The EPA and CDC both identify standing water as the primary breeding requirement for most mosquito species that bother people around homes, and many species can complete their life cycle in as little as 7 to 10 days in warm water ^[5]. Walk your property after it rains and dump anything holding water: saucers under potted plants, clogged gutters, tarps, kiddie pools, old tires, birdbaths that don't get changed weekly. This single habit does more for population control than any spray you can buy. After water, treat harborage. Mosquitoes rest in shaded, humid vegetation during the heat of the day, think dense shrubs, tall grass, ivy, the underside of deck boards. Barrier treatments (sprayed on the underside of leaves, foundation plantings, and shaded fence lines) knock down resting adults and residual product keeps working for roughly 10 to 21 days depending on the product and weather, which is why most professional programs run on a 2 to 3 week retreatment cycle rather than a single visit. A foundation-mounted or landscape misting system is the other route: it auto-sprays a fine mist on a timer, usually at dawn and dusk. It's more expensive up front and requires plumbing into your landscape, but it doesn't depend on remembering a technician visit. If you're comparing the two, a barrier spray plan on a 10 to 14 day cycle costs less and needs no hardware; a misting system costs more but runs itself. This is genuinely one where Duskproof walks people through both during the free yard assessment, because the right call depends on lot size, tree cover, and how bad your specific yard's breeding sites are. Fans matter more than people expect. Mosquitoes are weak fliers, generally topping out around 1 to 1.5 mph in still air, so a box fan or ceiling fan on a patio meaningfully cuts landings without any chemical at all ^[6].

How do you keep mosquitoes away without spraying every day?

The honest answer is you reduce the population at the source and reapply personal repellent only when you're actually outside during peak hours. Nobody needs to spray themselves at 10am to sit inside. Mosquitoes that bite people around houses in the U.S. (mainly Culex and Aedes species) are most active at dawn, dusk, or, for Aedes specifically, throughout the day in shade ^[7]. Aedes aegypti and Aedes albopictus, the ones that spread Zika and dengue in the U.S. when local transmission happens, are daytime biters, which surprises a lot of people who assume mosquitoes are strictly a dusk problem. Practical layering that actually reduces bites without turning every backyard hour into a chemical ritual: - Eliminate standing water weekly, this is the highest-leverage move and it's free.

• Run a barrier treatment on the 10-14 day cycle during peak season if pressure is heavy; see mosquito control for how that's typically scheduled.
• Use a fan on the patio.
• Apply an EPA-registered repellent to skin (mosquito repellent) when you'll be outside during dawn/dusk for more than a few minutes.
• Wear light-colored, looser clothing; some research suggests darker colors and tight-fitting clothes increase landing rates for Aedes species, though this isn't as rigorously quantified as DEET protection times.
• Check screens on windows and doors for tears. Candles, tiki torches with citronella oil, and ultrasonic devices are the categories with the weakest data. The NEJM trial cited above found citronella candles gave roughly 20 minutes of protection versus DEET's 301 minutes under lab conditions ^[2]. That's not nothing, it's just not much.

What plants repel mosquitoes, and does a mosquito repellent plant actually work?

A "mosquito repellent plant" is any plant that contains compounds mosquitoes find irritating or masking, most commonly citronella grass, lemon eucalyptus, lavender, marigold, catnip, and basil. The catch: having the plant in your yard does very little, because the repellent compound has to be extracted, concentrated, and applied to skin or crushed and rubbed on to have measurable effect, more than growing nearby. This is one of the more persistent myths in mosquito control. A citronella plant sitting in a pot on the patio releases its oils very slowly and in tiny amounts; it is not the same thing as citronella oil in a candle or repellent, which is distilled and concentrated. Extension entomologists at university programs generally describe potted "repellent plants" as providing negligible protection compared to an EPA-registered product ^[8]. That doesn't mean skip the plants, it means set expectations correctly. Lavender, marigolds, and lemongrass are fine landscaping choices and do smell good, and crushing the leaves and rubbing the oil on skin does release more of the active compound than the plant does passively. But nobody should plant a lavender border and skip repellent for an evening cookout expecting real protection. If you want the natural-ingredient route without giving up efficacy entirely, look at natural mosquito repellent options built on oil of lemon eucalyptus or 2-undecanone, both of which have actual EPA registration and trial data behind them, unlike a potted plant.

How do you get rid of mosquitoes in the house?

Indoor mosquitoes almost always mean either an entry point or an indoor breeding source, so the fix is find the gap or the water, more than spray the room. A can of aerosol insecticide knocks down what's flying right now but does nothing about tomorrow's mosquito if the source is still there. Check screens first. A single tear in a window screen or a door that doesn't seal at the bottom is often the whole problem. Mosquitoes are small enough to fit through gaps that look insignificant to a person. Check for indoor standing water next: a forgotten vase, a plant saucer, a bathroom floor drain that stays damp, even a reptile or fish tank with an open top can be enough for some species to lay eggs, though this is less common than outdoor sources. If you're finding mosquitoes indoors repeatedly rather than the occasional one that snuck in, indoor breeding is worth ruling out. For immediate relief in a room, a plug-in device with a repellent-treated pad, an aerosol labeled for indoor flying insect control, or simply a fan (mosquitoes struggle against airflow) all work as short-term measures. None of them fix an entry point or a breeding source, so treat them as symptom control while you find the real issue. If mosquitoes are getting in from the yard faster than screens can keep up, that's usually a sign the outdoor population is heavy enough to warrant a look at mosquito control near me rather than just fighting it room by room.

When do mosquitoes go away for the season?

Most mosquito species in the continental U.S. become inactive once nightly temperatures drop consistently below about 50°F (10°C), and activity effectively stops after the first hard frost, but the exact date varies a lot by region and this is a genuinely local question. The CDC and state extension services both frame mosquito season by regional climate rather than a calendar date, because a hard frost in Minnesota might land in late September while parts of the Gulf Coast rarely get one at all ^[9]. As a rough national pattern: northern states typically see mosquito activity drop off from October through November, while the Gulf Coast, Florida, and parts of the Southwest can have mosquito activity essentially year-round when winters stay mild. Some mosquito species also survive winter as eggs (in the case of Aedes) or as overwintering adults sheltering in structures (some Culex), which is why a warm spell in an otherwise cold month can bring a brief return of biting activity. Because this varies so much by county and even by microclimate (urban heat islands run warmer than surrounding rural areas), the most reliable answer for your specific yard is your local mosquito control district or state extension service, many of which publish seasonal activity charts based on regional trapping data. Search your state name plus "mosquito control district" or check your county extension office.

How do you get rid of ticks, and how is it different from mosquito control?

Getting rid of ticks starts with the same source-based thinking as mosquitoes but the tools differ, because ticks don't fly, breed in standing water, or respond to fans. Ticks quest from tall grass, leaf litter, and brush edges, waiting for a host to brush past, so yard treatment focuses on those specific microhabitats rather than the whole lawn. The CDC recommends a set of yard modifications collectively sometimes called tick-safe landscaping: keep grass mowed short, clear leaf litter and brush, create a 3-foot-wide barrier of wood chips or gravel between lawn and wooded areas to discourage tick migration, and keep playground equipment and seating away from yard edges ^[10]. This is the tick equivalent of dumping standing water for mosquitoes: unglamorous, unpaid, and genuinely effective. For yard treatment, EPA-registered acaricides applied to the perimeter, brush lines, and shaded ground cover reduce tick populations for a period of weeks, similar in concept to a mosquito barrier spray but targeting ground-level vegetation rather than shrub canopies. This does not eliminate ticks from a wooded property; the CDC's own guidance frames yard treatment as a risk-reduction measure alongside personal protection, not a standalone solution ^[10]. On the body, EPA-registered repellents (the same active ingredients covered above: DEET, picaridin, IR3535, OLE) work on ticks as well as mosquitoes, and the CDC separately recommends treating clothing and gear with 0.5% permethrin, which remains effective through multiple washes ^[10]. Permethrin is not applied to skin, only to fabric. For a closer look at product-level choices, see tick repellent.

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

Yard-level tick control combines the tick-safe landscaping habits above with a targeted acaricide application to the specific zones ticks actually occupy: the leaf litter and brush line at the yard's wooded edge, tall grass margins, stone walls, and shaded ground cover, not the open lawn where sunlight and mowing already keep ticks sparse. A 2004 study published by the Journal of Medical Entomology found that a single properly timed application of an acaricide to residential property perimeters reduced nymphal blacklegged tick (deer tick) populations substantially through the peak summer risk period, though the exact reduction percentage varies by study and treatment product . This is the scientific basis for perimeter-focused rather than whole-lawn treatment: ticks concentrate at habitat edges, so that's where treatment dollars and product actually matter. Deer are the other half of the tick equation for many suburban and rural properties, since adult blacklegged ticks feed on deer to complete their life cycle. Fencing that excludes deer, removing dense ornamental plantings deer favor, and keeping bird feeders (which attract mice, another key host for larval ticks) away from the house all reduce the animals that bring ticks onto a property in the first place. None of this, including professional acaricide treatment, removes ticks permanently from a wooded or brushy property. It reduces the number you'll encounter and shifts the odds in your favor, which combined with tick checks after time outdoors and prompt removal of any attached tick is the CDC's actual framework for reducing tick-borne disease risk ^[10].

When should you call a professional instead of DIY?

Call a professional when the yard's mosquito or tick pressure is bad enough that personal repellent and spot treatment aren't cutting it, when you have standing water sources you can't eliminate (a low spot that puddles, a neighbor's pool, a drainage easement), or when you want the barrier maintained on schedule without doing it yourself every two weeks. A quote-based service typically starts with a walk of the property to find breeding sites and resting harborage (the shaded, humid spots mosquitoes actually use during the day), then proposes either a seasonal barrier plan on a roughly 10 to 14 day retreatment cycle or an installed misting system for properties where automated dawn/dusk treatment makes more sense than a technician visit. Neither approach eliminates mosquitoes or ticks from a property; both knock the population down and keep it down for as long as you keep the program running. If you're trying to figure out which approach fits your yard, a free walk-through beats guessing from a product label. Get a free yard assessment and someone will actually look at your specific breeding sites, shade patterns, and lot size before recommending barrier spray versus a misting system.

Which repellent should you actually buy this weekend?

For most people standing in a store aisle: 20-30% DEET or 20% picaridin for general outdoor use, oil of lemon eucalyptus (look for "para-menthane-diol" or "PMD" on the label, 30% concentration) if you want a plant-derived option with real trial data behind it, and 0.5% permethrin spray for clothing and gear if ticks are a concern where you're headed. Skip citronella candles as a primary defense; use them as ambiance with a real repellent doing the actual work. Concentration matters more than brand. Two products with 20% picaridin from different companies will perform almost identically because the active ingredient, not the marketing, drives efficacy. Read the label for the percentage, check it's one of the five CDC/EPA-backed actives, and stop comparing bottles based on scent or packaging. For yard-scale problems that a can of spray can't fix, that's a different problem than personal repellent solves, and it's worth reading up on mosquito biology and mosquito control options before deciding between DIY barrier sprays and a professional program.

Frequently asked questions

How to get rid of mosquitoes fast in a backyard?

Dump all standing water immediately (this is the fastest single action), run fans on the patio since mosquitoes fly weakly in moving air, and apply an EPA-registered repellent to skin for the evening you need. For a lasting fix, a barrier spray treatment knocks down resting adults in shrubs for one to three weeks, but it needs to be reapplied on a schedule, not done once.

How to keep mosquitoes away without chemicals?

Eliminate standing water weekly, run a fan outdoors (mosquitoes struggle to fly above roughly 1 to 1.5 mph headwinds), wear long, light-colored clothing, and avoid peak activity times at dawn and dusk. These reduce exposure meaningfully but don't match the protection time of an EPA-registered repellent like DEET or picaridin, which the CDC backs even without added chemical-free measures.

How to get rid of ticks on a person or pet?

Remove an attached tick promptly with fine-tipped tweezers, grasping close to the skin and pulling straight up without twisting, per CDC guidance. For pets, use a vet-recommended tick preventive product and check them after time in grass or brush. For the yard itself, combine tick-safe landscaping with a perimeter acaricide treatment during peak tick season.

What is a mosquito repellent plant, exactly?

It's a plant containing natural compounds (like citronellal, geraniol, or eucalyptol) that mosquitoes find irritating, such as citronella grass, lemon eucalyptus, and lavender. Growing the plant in a pot or garden bed gives minimal protection because the oils release too slowly; the compound has to be extracted and concentrated, as in citronella oil or oil of lemon eucalyptus repellent, to have a measurable effect.

What plants repel mosquitoes the best?

Citronella grass, lemon eucalyptus, lavender, marigold, and catnip are the most commonly cited, based on the essential oils they contain. None of them provide reliable protection just by sitting in the yard; university extension guidance treats potted repellent plants as a minor supplement at best, not a substitute for an EPA-registered repellent or yard treatment.

How to get rid of mosquitoes in my house?

Check window and door screens for tears first, since that's the most common entry point, then look for indoor standing water sources like plant saucers or open containers. Use a fan or an indoor-labeled aerosol for immediate relief. If mosquitoes keep appearing despite sealed entry points, the outdoor population near the house is likely heavy and worth addressing at the source.

How to get rid of mosquitoes in the house permanently?

There's no permanent fix if the yard around the house keeps producing new mosquitoes; sealing screens and removing indoor water sources stops the immediate problem but outdoor pressure will keep testing your defenses. Pairing tight screens with an outdoor barrier treatment or reduced breeding sites in the yard addresses both the entry point and the source.

When do mosquitoes go away for the year?

Most U.S. mosquito activity drops sharply once nightly temperatures stay below about 50°F and stops after the first hard frost, but this varies widely by region: northern states typically see this in October or November, while Gulf Coast and Southwest states can have activity nearly year-round. Check your local extension service or mosquito control district for regional timing.

How to get rid of mosquitoes in backyard standing water?

Empty, remove, or treat any container holding water: plant saucers, clogged gutters, old tires, tarps, and unused kiddie pools. For water you can't remove (ornamental ponds, rain barrels), EPA-registered larvicide products containing Bti (Bacillus thuringiensis israelensis) kill larvae without harming most other wildlife when used per label directions.

How do you get rid of ticks from your yard without professional help?

Mow grass short, clear leaf litter and brush near the lawn edge, and create a 3-foot buffer of wood chips or gravel between lawn and wooded areas, per CDC tick-safe landscaping guidance. Keep play areas and seating away from yard edges. DIY acaricide sprays targeted at brush lines and ground cover add further reduction but need reapplication through the season.

Is DEET or picaridin better?

Both perform similarly in protection time (roughly 5 to 8 hours at appropriate concentrations) according to CDC and EPA data. DEET has a longer track record and can degrade some plastics and fabrics; picaridin is generally odorless and doesn't have that fabric issue. Neither is clearly "better"; choice often comes down to feel, smell, and what you're wearing or carrying.

Do ultrasonic mosquito repellent devices actually work?

There is no strong published evidence that ultrasonic devices reduce mosquito bites. Independent testing and entomology extension resources generally find no measurable protective effect compared to EPA-registered repellents, and the EPA does not register ultrasonic devices as pesticides since they contain no active ingredient with proven efficacy.

Sources

1. CDC, Mosquito Bite Prevention (for travelers/general public): EPA-registered insect repellents are proven safe and effective when used as directed, including for pregnant/breastfeeding women; concentration relates to duration not effectiveness
2. New England Journal of Medicine, Fradin & Day 2002: 23.8% DEET gave about 301 minutes of protection against mosquito bites versus roughly 20 minutes for a citronella-based product
3. EPA, Skin-Applied Repellent Ingredients: Picaridin (icaridin) is an EPA-registered active ingredient effective on skin and clothing
4. CDC, DEET history and use: DEET was developed by the U.S. Army and registered for public use in 1957
5. EPA, Mosquito Life Cycle: Many mosquito species can complete their life cycle from egg to adult in about 7 to 10 days in warm standing water
6. CDC, Mosquito-Borne Diseases overview: Mosquitoes are weak fliers, generally topping out around 1 to 1.5 mph in still air
7. CDC, Aedes aegypti and Aedes albopictus biology: Aedes aegypti and Aedes albopictus are primarily daytime biters, unlike many other mosquito species active at dawn and dusk
8. CDC, Mosquito Life Cycle and Habitat overview: Mosquito seasonal activity and overwintering vary by species and region rather than a fixed calendar date
9. CDC, Preventing Tick Bites on People: CDC tick-safe landscaping guidance includes short grass, cleared leaf litter, wood chip/gravel barriers, and permethrin-treated clothing recommendations
10. Journal of Medical Entomology, residential acaricide application study, 2004: A single, properly timed acaricide application to residential property perimeters reduced nymphal blacklegged tick populations through peak summer risk period