Citronella candles offer only minor, short-range mosquito deterrence. The research on them is largely unimpressive — most studies find they reduce mosquito landings by a modest amount in the immediate vicinity, not enough to meaningfully protect you during outdoor activities. They’re not useless, but they’re nowhere near as effective as most people assume.

What the Research Actually Shows

Citronella is a real insect repellent compound derived from certain grasses. When applied directly to skin, citronella-based products do have repellent properties — though they don’t last as long as DEET-based products. The problem with candles is delivery.

Burning a citronella candle disperses the compound into a small area around the flame. Studies have found:

  • Citronella candles may reduce mosquito landings by roughly 11–42% within a very limited radius (usually measured at less than one meter)
  • Any breeze at all dramatically reduces effectiveness by dispersing the scent before it can function as a deterrent
  • The protection doesn’t extend meaningfully to people sitting more than a few feet away from the candle
  • When tested against skin-applied repellents, candles perform substantially worse

The short version: a citronella candle might marginally reduce the number of mosquitoes that land on you if you’re sitting directly next to it on a still night. That’s a lot of conditions for a modest benefit.

Why People Think They Work

Citronella candles do create a noticeable smell, which gives an impression of doing something. And they may provide genuine (if minor) deterrence at very close range. Combine that with the placebo effect, confirmation bias, and the fact that some evenings simply have fewer mosquitoes than others — and it’s easy to credit the candle.

The bigger issue: they’re often used while other conditions contribute to lower mosquito activity (drier weather, no standing water nearby, sitting in a breezy area). The candle gets the credit.

What Actually Works for Outdoor Mosquito Protection

If you want to actually reduce mosquito pressure during outdoor time, here’s what the evidence supports:

  • Skin-applied repellents with DEET, picaridin, or oil of lemon eucalyptus — these are the gold standard and dramatically outperform candles. CDC-recommended.
  • Oscillating fans — mosquitoes are weak fliers. A fan creates enough airflow to make landing difficult and disperses the CO2 and heat signals you’re broadcasting
  • Long-sleeved, light-colored clothing — physical barriers are underrated
  • Eliminating standing water — reduces the local mosquito population at the source
  • Professional mosquito treatment — targeted treatments to resting areas and breeding sites dramatically reduce populations around your property for weeks at a time

Fans and repellents are your best bets for a single evening. Professional treatment is the answer if you want your entire yard to be comfortable all season.

When to Call a Professional

If you’re regularly avoiding your porch, patio, or yard because of mosquitoes — or if you’re hosting an outdoor event and need reliable protection — professional mosquito control is worth the investment. Seasonal treatment programs provide population-level control that no candle or consumer product can match.

Miller Pest Solutions treats mosquito resting areas and consults on breeding site reduction, giving you a yard you can actually enjoy throughout mosquito season.

What Miller Pest Solutions Does About Mosquitoes

Miller Pest Solutions has been helping homeowners in Des Moines, Kansas City, and Omaha reclaim their outdoor spaces since 2001. We’re a family-owned business with QualityPro Certification and NPMA membership — our technicians know mosquito biology and treatment strategies, not just how to spray and leave.

Our mosquito control approach targets the places mosquitoes actually spend most of their time — resting in shaded vegetation during the heat of the day — rather than treating surfaces mosquitoes barely touch. Combined with advice on eliminating standing water and breeding sites, we help you get real, sustained relief.

Learn more at our mosquito control page.

Get a Free Phone Bid

Don’t rely on candles that barely work. Call Miller Pest Solutions for a free phone bid and find out what professional mosquito control can do for your yard. Reach Des Moines at (816) 420-0340, Kansas City at (816) 409-3884, or Omaha at (402) 532-8863. Or get a quote online.