Citronella oil is one of the essential oils obtained from the leaves and stems of citronella grass, Cymbopogon winterianus. Citronella oil is a renowned plant-based insect repellent, and has been registered for this use in the United States since 1948. The United States Environmental Protection Agency considers oil of citronella as a biopesticide with a non-toxic mode of action. Refreshing and uplifting, Citronella is widely known for its insecticidal properties, but it is also helpful for fungal infections, indigestion and rheumatic pain. The lemony scent is good for headaches, fatigue and depression.