Home & Garden Home Natural Bug Spray Recipe to Make at Home A research-backed alternative to DEET. By Mary Jo DiLonardo Senior Writer University of Cincinnati Mary Jo DiLonardo covers a wide range of topics focused on nature, health, science, and anything that helps make the world a better place. our editorial process Mary Jo DiLonardo Updated July 24, 2020 There are natural ways to repel insects. Zbynek Pospisil / Getty Images Share Twitter Pinterest Email Home Pest Control Natural Cleaning DIY Family Green Living Thrift & Minimalism Sustainable Eating When you head outside to enjoy nature, there are often biting insects waiting to delight in your company. Even if you are a mosquito magnet, you may not like the idea of spraying synthetic chemicals on yourself or your kids to repel pests. Natural bug sprays are safe and can be an effective way to repel bugs instead. What Is DEET? DEET (known to chemists as N,N-diethyl-meta-toluamide) is the active ingredient used in many insect repellents. When applied to skin or clothing, it fends off biting insects like mosquitoes, ticks, and fleas. It has been found in products sold since the 1950s and an estimated one in three Americans uses a repellent containing DEET each year, according to the U.S. Environmental Protection Agency (EPA). In the 1980s and ‘90s, there were concerns that DEET was linked to encephalopathy (brain damage) in young children, but the connection was never conclusively proven, according to Consumer Reports. In 1998, the EPA conducted a comprehensive reassessment of DEET. The agency found 46 cases of seizures and four deaths potentially linked to exposure to the chemical. Most of those cases were linked to misuse, like spraying in an enclosed area. A 2014 study published in the journal Parasites and Vectors found "no evidence of severe adverse events associated with recommended DEET use.” In rare cases, DEET may cause skin rashes, blisters, and mucous membrane irritation according to the Centers for Disease Control and Prevention (CDC). Some lab studies in rats have shown that intense exposure to the chemical can impact the nervous system. DEET is generally safe if used correctly, but there are effective alternatives for those who wish to avoid it. One alternative to DEET gaining in popularity in recent years is picaridin. The chemical is not known to irritate skin or have the same odor as DEET. In one review of 11 studies published in the Journal of Travel Medicine, researchers concluded that picaridin was as effective as DEET in most cases, and sometimes performed better. Natural Ingredients for Bug Spray Most repellents that are applied to your skin have to be registered with the EPA, which means they’ve been evaluated for safety and effectiveness. The agency also evaluates some unregistered natural ingredients used as bug repellents for safety. They haven’t been tested for effectiveness. They include citronella oil, cedar oil, geranium oil, peppermint and peppermint oil, and soybean oil. Here is a look at some natural ingredients that are sometimes used in insect repellent and the science behind their effectiveness. Citronella Oil A longtime, well-known repellent, citronella is known to deter mosquitos for only about two hours. When mixed with vanillin (found in vanilla beans), its effectiveness lasts longer. Citronella oil is considered safe in the U.S. However, it is not used in Canada and Europe because of lack of safety data. Oil of Lemon Eucalyptus Products containing oil of lemon eucalyptus (OLE) are effective at repelling mosquitoes, according to the CDC. Oil of lemon eucalyptus is not the same as lemon eucalyptus essential oil, which has not been shown to repel insects. Warning Pure oil of lemon eucalyptus should not be applied directly to the skin. To use it safely as a repellant, dilute it with a base mixture, such as witch hazel. Peppermint Oil There’s a modest amount of research that shows that peppermint and peppermint oil work at repelling insects. One study published in Fashion and Textiles found that peppermint and lavender were effective at keeping mosquitoes away from cotton fabrics. Another study suggested that peppermint oil may have some properties that repel spiders. Garlic Oil It’s not just vampires. Research suggests that garlic oil may help repel ticks. In one study, garlic oil was sprayed in backyards and showed promise in cutting back the number of black-legged ticks. Geraniol Oil With its pleasant, rose-like smell, geraniol oil is often used for insect control. Research suggests it can repel mosquitoes in diffuser and candle form and is more effective than citronella. Studies have found that it can both kill and repel insects, without many side effects. Rosemary Oil Mosquitoes don’t like this aromatic herb. Research has found that a 20% solution of rosemary can protect against one of the mosquitoes that causes malaria for eight hours. Other concentrations have been shown to repel other species of mosquitoes. Catnip Oil Alluring to cats but not so attractive to mosquitoes, the essential oils in catnip have been found to be an effective insect deterrent. One study published in Scientific Reports found that for the first two hours, catnip oil repelled more than 95% of mosquitoes. In some cases, it was more effective than DEET. Natural Mosquito Repellent Recipe To make your own natural mosquito repellent, you’ll need an essential oil plus a base, like witch hazel, vodka, or olive oil. Supplies Essential oil of your choice, like oil of lemon eucalyptus Base mixture, like witch hazel Spray bottle Instructions In the bottle, mix one part essential oil to 10 parts of your base mixture. That’s one drop of oil for every 10 drops of base mixture. Shake well each time before using. Spray away from eyes and face. Other Natural Ways to Prevent Bugs If you don’t want to spray anything on your body to repel insects, there are other natural ways to deter bugs from biting you. Try placing plants that repel unwanted insects in your garden. Because mosquitoes are attracted to dark colors, wear whites, khakis, and pastels. Avoid being outdoors at dusk and dawn when mosquitoes are most active. Make your yard less attractive to mosquitoes by eliminating standing water, using a fan, and installing bat houses. Avoid heavily scented perfumes, soaps, lotions, and other personal care products that can attract bugs.