Study on Efficacy of Various Solvents and Extractions on Repelling Forcipomyia taiwana

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Abstract:

The bites of Forcipomyia taiwana (F. taiwana) cause swelling and pruritus in sensitive skins, and are often prevented by synthetic repellents. The commercially available repellents are composes of N,N-diethyl-3-methylbenzamide, long-term use of which may results in negative influence on skins as well as nervous and immune systems. This study first examines how different organic solvents influence on the repellent effect on F. taiwana, after which solvents are used for the extraction of Cinnamomum osmophloeum Kaneh, Cymbopogon excavates, Mentha, Rosmarinus officinalis, Salvia officinalis, and Eucalyptus globulus. The plant extracts are tested for their repellent effect on F. taiwana with a Y-tube test. The experiment results show that of all solvents, only water attracts F. taiwana, furthermore, with water as the solvent, except for Eucalyptus globulus, all the other plant extracts, are repellent to F. taiwana.

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186-189

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March 2014

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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