Latin Name: Cymbopogon Nardus Part of the plant used: dry grass Source: Vietnam Extraction method: steam distillation Citronella oil is steam distilled from the leaves and stems of Cymbopogon plant species, especially Cymbopogon nardus. Citronella essential oil is famous as a plant-based insect repellent, a biopesticide with a non-toxic mode of action, and has been registered for this use in the U.S. UU. Since 1948. The main countries that produce this oil are Indonesia and China, which together produce around 40% of the world's citronella essential oil. In addition to being useful as an insect repellent for the skin, this oil is good for excessive perspiration, oily skin and hair, and works as a deodorant. It is said to ease pain due to rheumatism and arthritis, and resists the flu, colds, and minor infections.