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Tobacco's content of toxic nicotine 'makes it an excellent green pesticide'

Washington, Thu, 28 Oct 2010 ANI

Washington, Oct 28 (ANI): Scientists are searching for new uses of tobacco and one potential use they have found is its use as a natural pesticide, due to tobacco's content of toxic nicotine.

 

A "green" pesticide industry based on tobacco could provide additional income for farmers, and as well as a new eco-friendly pest-control agent, said Cedric Briens and colleagues.

 

They describe a promising way to convert tobacco leaves into pesticides with pyrolysis - a process that involves heating tobacco leaves to about 900 degrees Fahrenheit in a vacuum, to produce an unrefined substance called bio-oil.

 

The scientists tested tobacco bio-oil against a wide variety of insect pests, including 11 different fungi, four bacteria, and the Colorado potato beetle, a major agricultural pest that is increasingly resistant to current insecticides.

 

The oil killed all of the beetles and blocked the growth of two types of bacteria and one fungus. Even after removal of the nicotine, the oil remained a very effective pesticide.

 

Its ability of the oil to block some but not all of the microorganisms suggests that tobacco bio-oil may have additional value as a more selective pesticide than those currently in use, the report indicated.

 

The study is published in ACS' bi-weekly journal Industrial and Engineering Chemistry Research. (ANI)

 


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