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Repellent activity of Thai essential oils derived from ylang-ylang (Cananga odorata), lemon grass (Cymbopogon citratus) and citronella grass (Cymbopogon nardus) were evaluated against female Aedes aegypti (L.) and Culex quinquefasciatus (Say) and compared a commercially available repellents (IR3535, ethyl butylacetylamino propionate 12.5% w/w; Johnson’s Baby Clear Lotion Anti-Mosquito®). Each test repellent was applied at 0.17 and 0.33 µl/cm2 on the forearm of volunteers. All essential oils at 0.17 µl/cm2 showed lower protection time and percentage of protection against two mosquito species than at 0.33 µl/cm2. All essential oils exhibited higher repellent activity than chemical repellent. The essential oil of C. citratus at 0.33µl/cm2 exhibited excellent repellent activity with 98.67% protection from bites of A. aegypti for 116.67±55.75 min and 99.75% protection from bites of C. quinquefasciatus for 128.33±12.89 min. However, repellent activity in order of protection time and percentage of protection against two mosquito species in three essential oils was C. citratus oil >C. odorata oil >C. nardus oil. Our data showed that C. citratus oil is an effected green repellent for mosquitoes that is safe for humans and environmentally friendly.       Key words: Repellent, Aedes aegypti, Culex quinquefasciatus, Thai essential oil.

african journal of microbiology research

Mosquito repellent from Thai essential oils against dengue fever mosquito (Aedes aegypti (L.)) and filarial mosquito vector (Culex quinquefasciatus (Say))