The best mosquito prevention products are the ones that stack on top of a clean, water-free yard — not the ones that promise to replace it. Once you've done the free source-reduction work, the right gear finishes the job: Bti larvicide for water you can't drain, gravid traps to intercept egg-laying females, CDC-recommended repellents for your skin, permethrin for your clothes, and a fan for your patio. Here's exactly what earns a spot, why, and what to skip.
What actually kills mosquitoes before they can bite?
Larvicide. If you want the highest impact per dollar in this entire guide, it's Bti — a mosquito-specific bacterium that kills larvae in any water you can't or won't drain, while leaving people, pets, fish, birds, and bees alone. It's EPA-registered, cheap, and lasts about a month per treatment.
Between weekly water-dumping and a few Bti treatments, you've cut off most of the next generation. Now for the adults already flying.
Do mosquito traps actually work?
Yes — the right traps, used the right way. The ones worth your money are gravid and oviposition traps: they exploit a female mosquito's need to find water for her eggs. She's lured into what looks like the perfect nursery and never leaves. This is the CDC-validated approach that knocked down Aedes populations across whole communities in Puerto Rico, and it targets exactly the container-breeders that dominate NYC yards.
Traps are a population tool — they work over weeks, not minutes, and they work best when several neighbors run them at once. That patience is the price of hitting the breeding cycle instead of just tonight's swarm.
What's the best mosquito repellent?
For skin, the CDC recommends products with one of a short list of proven active ingredients: DEET, picaridin, oil of lemon eucalyptus (OLE/PMD), IR3535, or 2-undecanone. Everything else is marketing. Our default pick is 20% picaridin, because it works as well as DEET without the grease, smell, or melted-sunglasses problem — which means you'll actually wear it.
Prefer a plant-derived option? Oil of lemon eucalyptus (OLE/PMD) is the one botanical active the CDC backs — we don't stock a pick, but any EPA-registered OLE product from a pharmacy works (just not for kids under 3).
Protect your clothes, not just your skin
The pro move is to treat your clothing with permethrin. You don't wear it on skin — you spray it on shirts, pants, socks, and hats, let them dry, and the treated fabric repels and kills mosquitoes (and ticks) for weeks. Pair permethrin-treated clothes with picaridin on exposed skin and you're wearing a near-complete armor set.
How do I protect a patio or stoop specifically?
Two products own this job, and one of them you might already own.
For a defined seating area on a calm night, a spatial repeller plus a fan is a genuinely strong, low-effort combo — no spraying anything onto your body.
Is it ever worth spraying the yard?
Occasionally — as a limited-charge special attack, not a habit. A hose-end pyrethroid spray gives real knockdown for an event in a few hours, but it also kills pollinators and beneficial insects, does nothing to breeding sites, and drives resistance if overused.
If you're reaching for yard spray every week, that's a sign the free source-reduction work is being skipped. Fix the breeding sites and you'll rarely need it.
What if I want to spend almost nothing?
Then build the trap instead of buying it. Our free DIY bucket-trap guide turns a five-gallon bucket, some hay, and one Bti dunk into the same gravid-trap concept behind the commercial units — for a couple of dollars. It's the bonus level: cheap, effective, and a great way to get a whole block trapping together.
The recommended stack, in order
If you did nothing else, buy in this order:
- Bti (Dunks + Bits) — kills larvae in un-dumpable water. Cheapest, highest impact.
- A gravid trap (Ovi-Catch AGO or BG-GAT) — intercepts egg-laying females over the season.
- Picaridin repellent — for your skin, every day it matters.
- Permethrin — for your clothes, if you garden, walk dogs, or run at dusk.
- A fan and/or spatial repeller — for the specific patio or stoop you actually sit on.
Everything above stacks on the free foundation. Browse the full lineup — with the honest debuffs, not just the power-ups — in the Arsenal. And if you're in Bed-Stuy, the pilot will put a gravid trap in your yard for free.
Player questions
What is the single best mosquito product to buy first?
Bti larvicide (Mosquito Dunks and Bits). It kills mosquito larvae in any standing water you can't drain, costs very little, lasts about a month, and is safe for people, pets, fish, birds, and bees. It has the highest impact per dollar of anything in the category because it stops mosquitoes before they can fly or bite.
Do mosquito traps actually work?
Gravid and oviposition traps do. They lure egg-laying females into a fake nursery they can't escape, targeting the container-breeding mosquitoes common in cities. This CDC-validated approach reduced Aedes populations across whole communities in field studies. Traps work over weeks and are most effective when several neighbors run them together. Bug zappers, by contrast, barely affect mosquito numbers.
Is picaridin or DEET better?
Both are CDC-recommended and both work. In head-to-head tests 20% picaridin protects about as long as DEET against mosquitoes, but without the greasy feel, strong smell, or tendency to damage plastics and synthetic fabrics — so most people apply it more consistently. DEET remains an excellent, widely available, well-studied choice.
What is permethrin and how is it different from repellent?
Permethrin is applied to clothing and gear, not skin. Treated fabric repels and kills mosquitoes and ticks on contact for about six weeks or six washes. Pair permethrin-treated clothes with a skin repellent like picaridin for near-complete coverage. Apply it to fabric outdoors and let it dry fully before wearing.
Should I spray my yard for mosquitoes?
Only occasionally, for a specific event. Hose-end pyrethroid sprays give fast knockdown but also kill pollinators and beneficial insects, do nothing to breeding sites, and drive pesticide resistance if overused. If you feel you need to spray weekly, the real fix is eliminating the standing water where mosquitoes breed.
Can I make an effective mosquito trap myself?
Yes. A dark five-gallon bucket half-filled with water, a handful of hay or grass left to ferment for a day or two, and a quarter of a Bti dunk creates the same gravid-trap effect as commercial units for a couple of dollars. See our free DIY bucket-trap guide for step-by-step instructions.