Summary

Original source:
http://www.sciencedaily.com/releases/2004/07/040716081706.htm

Details

• Cinnamon oil shows promise as a great-smelling, environmentally friendly pesticide, with the ability to kill mosquito larvae more effectively than DEET, according to a new study.
• Besides being a summer nuisance, mosquitoes pose some major public health problems, carrying such deadly agents as malaria, yellow fever and West Nile virus.
• "These problems have highlighted the need for new strategies for mosquito larval control," says natural products chemist Peter Shang-Tzen Chang, a professor in the School of Forestry and Resource Conservation at National Taiwan University and lead author of the paper.
• Chang and his coworkers tested eleven compounds in cinnamon leaf oil for their ability to kill emerging larvae of the yellow fever mosquito, Aedes aegypti.
• "The LC50 value is the concentration that kills 50 percent of mosquito larvae in 24 hours," Chang explains.
• All four compounds had LC50 values of less than 50 parts per million (ppm), with cinnamaldehyde showing the strongest activity at an LC50 of 29 ppm.
• For comparison, the LC50 of DEET--- an extremely popular pesticide and mosquito repellant --- is more than 50 ppm.

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