Abstract
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.
Highlights
Mosquito is a serious insect to public health, which transmits several dangerous diseases such as dengue, filariasis, malaria, yellow fever and Japanese encephalitis.Every year at least 500 million people in the world suffer from one or the other tropical diseases that include dengue, malaria and filariasis (Madhumathy et al, 2007; Kumar et al, 2012)
The results of 0.33 μl/cm2 of herbal essential oil repellents and IR3535 against two mosquito species are shown in Table 2 and Figure 2
Our study clearly revealed that all essential oils from Thai herbs at 0.33 μl/cm2 offered protection against the mosquito species tested for more than 80 min
Summary
Mosquito is a serious insect to public health, which transmits several dangerous diseases such as dengue, filariasis, malaria, yellow fever and Japanese encephalitis. Every year at least 500 million people in the world suffer from one or the other tropical diseases that include dengue, malaria and filariasis (Madhumathy et al, 2007; Kumar et al, 2012). Dengue worldwide disease is transmitted by Aedes aegypti, approximately 2.5 billion people from 100 countries live in areas infested with these mosquito vectors (Borah et al, 2010). Reported cases of dengue and dengue hemorrhagic fever have shown an exponential increase over the last 30 years.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
