Department of Agricultural Chemistry, National Taiwan University, Taipei, Taiwan.
J Environ Sci Health B. 2013;48(11):1014-9. doi: 10.1080/03601234.2013.816613.
The mosquito Aedes aegypti is an epidemic vector of several diseases such as dengue fever and yellow fever. Several pesticides are used to control the mosquito population. Because of their frequent use, some mosquitoes have developed resistance. In this study, we used the Y-tube olfactometer to test essential oils of Cymbopogon species and screened specific formulas of components as repellents against Ae. aegypti. At 400 μL, the extracted oil of citronella grass (Cymbopogon nardus) and myrcene produced a low-active response by inhibiting mosquito host-seeking activity. Citronella grass, lemon grass (Cymbopogon citratus), citral and myrcene also produced a low-treatment response to repellents, for more potential to affect host-seeking behavior. Furthermore, the mixture of citral, myrcene, and citronellal oil (C:M:Ci = 6:4:1) greatly affected and inhibited host-seeking behavior (76% active response; 26% treatment response with 40 μL; 42.5%, 18% with 400 μL; and 19%, 23% with 1000 μL). As compared with the result for N,N-diethyl-3-methylbenzamide (DEET; 44%, 22% with 400 μL), adjusting the composition formulas of citronella oil had a synergistic effect, for more effective repellent against Ae. aegypti.
埃及伊蚊是登革热和黄热病等几种疾病的流行病媒。有几种杀虫剂被用于控制蚊子的数量。由于它们的频繁使用，一些蚊子已经产生了抗药性。在这项研究中，我们使用 Y 型嗅觉仪测试了香茅属植物的精油，并筛选了特定成分的配方作为驱避剂来对抗埃及伊蚊。在 400μL 时，香茅精油（Cymbopogon nardus）和苎烯的提取油产生了低活性反应，抑制了蚊子的宿主寻找活动。香茅、柠檬草（Cymbopogon citratus）、柠檬醛和苎烯也对驱避剂产生了低处理反应，更有可能影响宿主寻找行为。此外，柠檬醛、苎烯和香茅醛油的混合物（C：M：Ci = 6：4：1）极大地影响和抑制了宿主寻找行为（40μL 时的活性反应为 76%；处理反应为 26%；400μL 时为 42.5%，18%；1000μL 时为 19%，23%）。与 N，N-二乙基-3-甲基苯甲酰胺（DEET；400μL 时的 44%，22%）相比，调整香茅油的成分配方具有协同作用，对埃及伊蚊更有效。
