Cedar Oil Uses

• A variety of insects avoid areas (and animals) treated with cedar oil. In addition to mosquitoes and gnats, the natural repellent deters termites and moth larvae. It is used in pet shampoo formulas to ward off fleas, ticks and mites. Cedar oil is not registered with the U.S. Environmental Protection Agency as an insect repellent, as of 2011.
  
  

Applying the Oil

• Apply bug repellents containing cedar oil topically. Unless otherwise indicated on the product packaging, you can apply cedar oil-based insect repellents directly to the skin, unlike some chemical-based repellents. To repel insects in an area -- as opposed to on a person or animal -- distribute sprays, gels or pellets containing cedar oil. Since cedar oil naturally dissipates in the air, reapply the repellent frequently, following package instructions.
  
  

Warnings and Concerns

• When used according to package instructions, cedar oil used as a pesticide does not present any harmful risks to humans or the environment, according to the EPA. Since cedar oil usage for pets doesn't fall under the EPA's jurisdiction, only use cedar oil-based products labeled for pets on pets. While cedar oil may not harm the pet, other ingredients in a product labeled for human use -- such as fragrance -- might cause a pet to have an allergic or toxic reaction..
  
  

Homemade Cedar Oil Repellent

• If you prefer going all natural, make your own cedar oil insect repellent. "Mother Earth News" offers this recipe: Mix together a combination of cedar oil, citronella oil, juniper oil, lemon oil and pine oil until you reach a total of 2 tsp. of liquid. To add a sweet fragrance, include rose or geranium oil. Stir well, then add 1 cup of 190-proof plain grain alcohol. Store the mixture in a small spray bottle. Spray the repellent directly on the skin as needed.