Synopsis

Source of validity: Scientific
Rating (out of 5): 4

Citronella is widely recognized as an effective natural insect repellent, particularly against mosquitoes. The essential oil is derived from species of Cymbopogon (lemongrass) and contains active compounds such as citronellal, citronellol, and geraniol. Multiple scientific studies have validated its efficacy: research published in peer-reviewed journals, including the Journal of Vector Ecology and Phytotherapy Research, consistently demonstrates that citronella oil can provide significant short-term protection against mosquito bites. The mechanism of action is believed to involve masking human scents that attract insects, thereby reducing the likelihood of bites. However, the protection duration tends to be relatively short, typically lasting less than two hours, as citronella evaporates quickly from the skin. Formulation improvements, such as combining citronella with other essential oils or using controlled-release technologies, have been shown to extend its efficacy. The U.S. Environmental Protection Agency (EPA) recognizes citronella oil as a minimum risk pesticide, and it is a common ingredient in many commercial natural insect repellent products. While the level of protection may not match that of synthetic repellents like DEET, the evidence supporting citronella’s role as an insect repellent is robust, especially for short-term use. Historical use and traditional practices also support its application, but the scientific foundation for its effectiveness is strong.

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