Tobacco water, tobacco juice or tobacco dust juice is a traditional organic insecticide used in domestic gardening. In The English Physician Enlarged of 1681, Nicholas Culpeper recommends tobacco juice to kill lice on children's heads, referencing it as an insecticide poison. Farmers have been using nicotine sulfate insecticide since the early 19th century.
Tobacco water is produced by boiling strong tobacco in water, or by steeping the tobacco in water for a longer period. When cool, the mixture can be applied with a spray, or 'painted' on to the leaves of garden plants, where it will prove deadly to insects.
Tobacco dust juice has a similar use but is produced by mixing water with tobacco dust and black pepper.
- Tobacco as Insecticide: A Classroom Activity, Purdue University
- "Vaporized Tobacco Juice.". The Maitland Mercury & Hunter River General Advertiser (NSW : 1843 - 1893) (NSW: National Library of Australia). 18 September 1884. p. 6. Retrieved 7 October 2013.
- "Tobacco Juice.". Northern Star (Lismore, NSW : 1876 - 1954) (Lismore, NSW: National Library of Australia). 17 February 1900. p. 6. Retrieved 7 October 2013.