Abu Bakar A, Sulaiman S, Omar B, Mat Ali R
Department of Biomedical Science, Faculty of Allied Health Sciences, University Kebangsaan Malaysia, Jalan Raja Muda Abdul Aziz, 50300 Kuala Lumpur, Malaysia.
J Arthropod Borne Dis. 2012;6(1):28-35. Epub 2012 Jun 30.
Melaleuca cajuputi essential oil in aerosol spray was evaluated against the dengue vectors Aedes aegypti and Ae. albopictus at low cost housing flats in Section 10, Setapak, Kuala Lumpur, Malaysia.
ESSENTIAL OIL IN AEROSOL VIZ: 5% and 10% of concentrations were sprayed for 5 seconds each towards hung mosquitoes in 5 cylindrical net cages. Aerosol weights were recorded before and after spraying to determine discharge rates. Knockdown and mortality number were observed and compared to MS standard aerosol which contain 0.07% prallethrin and 0.05% d-phenothrin as positive control and aerosol contain 40% kerosene and 60% LPG was used as negative control.
High knockdown and mortality was observed in both species of mosquitoes towards MS standard aerosol. There was a significant difference (P< 0.05) of mortality and knockdown between 5% and 10% of essential oil aerosol and 5% and 10% essential oil between MS standard. For 5% essential oil, mean percentage (%) of knockdown and mortality of Ae. aegypti displayed slightly higher compared to Ae. albopictus. Spraying with 5% M. cajuputi essential oil aerosol indicated a knockdown of Ae. aegypti 5.60±1.18 and mortality of 22.90±4.22 while Ae. albopictus showed 4.60±0.89 knockdown and 20.00±2.85 mortality. The 10% essential oil concentration gave 23.60±1.68 knockdown and 48.05±0.37 mortality for Ae. aegypti. Ae. albopictus gave 23.00±3.16 knockdown and 44.20 ± 2.10 mortality respectively.
Extracts of essential oils does possessed an adulticidal effects and could be considered and utilized for future dengue vectors control.
在马来西亚吉隆坡士打柏10区的低成本住房公寓中，对用于喷雾器的白千层精油针对登革热媒介埃及伊蚊和白纹伊蚊进行了评估。
在5个圆柱形蚊帐笼中，对悬挂的蚊子分别以5%和10%的浓度喷雾精油气雾剂5秒钟。喷雾前后记录气雾剂重量以确定喷出率。观察击倒和死亡数量，并与含有0.07%丙炔菊酯和0.05%右旋苯醚菊酯的MS标准气雾剂作为阳性对照，以及含有40%煤油和60%液化石油气的气雾剂作为阴性对照进行比较。
两种蚊子对MS标准气雾剂均表现出高击倒率和死亡率。5%和10%的精油气雾剂与MS标准气雾剂之间，在死亡率和击倒率方面存在显著差异（P<0.05）。对于5%的精油，埃及伊蚊的平均击倒率和死亡率百分比略高于白纹伊蚊。用5%白千层精油气雾剂喷雾显示，埃及伊蚊的击倒率为5.60±1.18，死亡率为22.90±4.22，而白纹伊蚊的击倒率为4.60±0.89，死亡率为20.00±2.85。10%的精油浓度使埃及伊蚊的击倒率为23.60±1.68，死亡率为48.05±0.37。白纹伊蚊的击倒率分别为23.00±3.16，死亡率为44.20±2.10。
精油提取物确实具有杀成虫作用，可考虑用于未来登革热媒介的控制。
