[2] The United States Environmental Protection Agency considers oil of citronella as a biopesticide with a non-toxic mode of action.
[9] Both types probably originated from Mana Grass of Sri Lanka, which according to Finnemore (1962) occurs today in two wild forms – Cymbopogon nardus var.
[16][17][18] Although direct application of citronella oil to the skin is non-toxic, its use was not recommended as a topical insect repellent in Canada in 2006.
The oil is also produced in Taiwan, Guatemala, Honduras, Brazil, Sri Lanka, India, Argentina, Ecuador, Jamaica, Madagascar, Mexico, and South Africa.
[citation needed] The market for natural citronella oil has been eroded by chemicals synthesised from turpentine derived from conifers.