The most effective way to stop bugs from biting you is to use an EPA-registered repellent containing DEET, picaridin, IR3535, or oil of lemon eucalyptus, applied correctly to exposed skin. Combine that with the right clothing choices and some basic yard maintenance, and you can cut your bite count dramatically. Here’s how to layer these strategies for real protection.
What Draws Bugs to You
Mosquitoes and other biting insects find you through a combination of signals, not just one. Carbon dioxide from your breath triggers their initial flight toward you, but it’s not enough on its own. They also need to detect body heat, moisture on your skin, and specific chemicals in your sweat, particularly lactic acid, which your muscles produce during physical activity. That’s why you tend to get bitten more after exercising or spending time outdoors in the heat.
Visual cues matter too. Research from the University of Washington found that mosquitoes are strongly attracted to black and red clothing, while blue, green, purple, and white were far less appealing. If you’re heading somewhere buggy, your outfit choice is one of the simplest changes you can make.
Choosing the Right Repellent
Not all repellents are equal, and concentration matters more than brand. The CDC recommends products with at least 20% DEET for reliable protection. Repellents with less than 10% of any active ingredient typically last only one to two hours. Going above 50% DEET, though, doesn’t add any extra protection. Higher concentrations last longer but aren’t better at keeping insects away.
The EPA currently registers several active ingredients as safe and effective for skin application:
- DEET: The longest-studied option. A 20-30% concentration covers most outdoor activities.
- Picaridin: Odorless and less greasy than DEET, with comparable protection at similar concentrations.
- IR3535: Common in European formulations and widely available in the U.S.
- Oil of lemon eucalyptus (OLE): The strongest plant-based option. Its active compound, PMD, performed comparably to DEET in lab tests, repelling mosquitoes effectively for up to six hours.
- Catnip oil and oil of citronella: EPA-registered but generally shorter-lasting than the options above.
Pick any of these based on your preference for feel, scent, and duration. If you’re in an area with disease-carrying mosquitoes or ticks, stick with DEET, picaridin, or OLE at adequate concentrations.
How to Apply Repellent Properly
Spray or rub repellent on all exposed skin, not just your arms. Ankles, the back of your neck, and your ears are common bite zones people miss. If you’re also wearing sunscreen, apply the sunscreen first and the repellent on top. Reapply according to the product’s label, especially after swimming or heavy sweating.
For children, adults should spray repellent onto their own hands first, then apply it to the child’s face, avoiding the eyes, mouth, and any cuts or irritated skin. Don’t apply it to a child’s hands, since kids frequently touch their faces. Products containing OLE or PMD should not be used on children under 3 years old.
Treating Your Clothing With Permethrin
Repellent on your skin handles exposed areas. Permethrin on your clothing handles everything else. Permethrin is a synthetic insecticide that kills or repels ticks, mosquitoes, and other biting insects on contact with treated fabric. You can buy pre-treated clothing or spray it yourself onto pants, shirts, socks, and shoes. It should never be applied to underwear or directly to skin.
Factory-treated garments hold up through dozens of washes. Spray-on treatments last fewer cycles but are easy to reapply. The EPA recommends washing treated clothing separately from your other laundry. For full protection, pair permethrin-treated clothing with a skin repellent on any areas the fabric doesn’t cover.
What You Wear Matters
Long sleeves and long pants are the obvious first layer of defense, but color and fit also play a role. Mosquitoes are visually drawn to dark colors, especially black and red. Wearing white, light blue, or green makes you less visible to them. Loose-fitting clothing adds another advantage: mosquitoes can bite through tight fabric that presses against your skin, but a looser weave with some air gap between the cloth and your body makes it much harder for them to reach you.
Reducing Bugs Around Your Home
Mosquitoes breed in standing water, and they don’t need much. Even one ounce of standing water can support a population of larvae. Those larvae develop into biting adults in as little as 5 to 14 days, so a forgotten saucer under a flowerpot can become a mosquito factory in under two weeks.
Walk your yard weekly and dump or flip anything that collects water: plant saucers, old tires, buckets, kiddie pools, clogged gutters, birdbaths, and wheelbarrows. Birdbaths and pet bowls should be refreshed every few days. If you have a rain barrel, make sure it has a tight-fitting screen. For water features you can’t drain, like ponds, mosquito dunks (tablets containing a bacteria toxic only to larvae) are a low-effort solution.
Keeping grass trimmed and bushes pruned also helps. Adult mosquitoes rest in cool, shady vegetation during the day, so reducing that harborage near your patio or doorways cuts down on the population right where you spend time.
What Doesn’t Work
Some popular strategies have no scientific support. Ultrasonic repellent devices, the plug-in or wearable gadgets that claim to emit high-frequency sounds, have been tested repeatedly. The research consensus is that they don’t work.
Eating garlic to ward off mosquitoes is another persistent idea with no backing. A controlled study found that garlic consumption did nothing to reduce attractiveness to mosquitoes. The same goes for vitamin B supplements. Studies going back to the 1940s have failed to show any protection, and a 2005 trial confirmed that vitamin B did not influence how mosquitoes responded to human skin chemicals.
Citronella candles provide marginal help in a small, still area, but their protection zone is tiny and disappears with any breeze. They’re fine as a supplement but shouldn’t be your primary strategy.
Layering Your Protection
No single method is perfect, but combining several makes a big difference. Treat your clothing with permethrin. Apply a repellent with at least 20% DEET or equivalent to exposed skin. Choose light-colored, loose-fitting clothes. Eliminate standing water around your home. Time your outdoor activities to avoid dawn and dusk, when many mosquito species are most active. Each layer you add makes it harder for biting insects to find you, land on you, and get through to your skin.