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Adulticidal, larvicidal, pupicidal and oviposition deterrent activities of essential oil from Zanthoxylum limonella Alston(Rutaceae) against Aedes aegypti(L.) and Culex quinquefasciatus(Say)

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Asian Pacific Journal of Tropical Biomedicine 2017年第11期7卷 967-978页

作者： Mayura Soonwera siriporn phasomkusolsil Department of Plant Production Technology Faculty of Agricultural TechnologyKing Mongkut's Institute of Technology LadkrabangBangkok 10520Thailand Department of Entomology Armed Forces Research Institute of Medical SciencesBangkok 10400Thailand

Objective: To evaluate adulticidal, larvicidal and oviposition deterrent response of the essential oil from dried Zanthoxylum limonella(Z. limonella) fruit against Aedes aegypti(Ae. aegypti) and Culex quinquefasciatus(Cx. quinquefasciatus).Methods: Z. limonella oil was tested by biological assays at 1%, 5% and 10% concentrations in ethanol. Adulticidal efficacy was tested against the 2–3 day old adult females. Larvicidal activity was tested against immature stage of mosquitoes. Oviposition deterrence of the oil was evaluated on gravid ***: The adult mortality was observed after 24 h with the LC50 of 6.0% for ***, and 5.7% for Cx. quinquefasciatus. Larvicidal bioassay was carried out with the 10% Z. limonella oil against immature stages of Ae. aegypti and Cx. quinquefasciatus,which caused 100% mortality after 12 h and 24 h. In the larvicidal experiment,Z. limonella showed effective result at 1%, 5% and 10% concentrations with the values of LT50 Ae. aegypti = 9.78, 5.61, 0.24 h for larvae and LT50= 64.08, 21.23 h for pupae;Cx. quinquefasciatus had LT50= 28.46, 20.25, 1.01 h for larvae and LT50= 67.52, 27.96,4.11 h for pupae, respectively. Oviposition deterrence of the oil was evaluated on gravid females. In the study, 10% Z. limonella showed 100% repellency for Ae. aegypti and99.53% for Cx. quinquefasciatus. Likewise, oviposition activity indexes of these oil concentrations were all negative values ranging from–0.89 to-1.00 for Ae. aegypti and–0.64 to–0.99 for Cx. quinquefasciatus. The oviposition activity indexes values revealed that Z. limonella oil has deterrent effect, and it caused a remarkable negative response resulting in very few ***: This result indicates that Z. limonella oil can be used as an effective adulticide, larvicide and oviposition deterrent against Ae. aegypti and Cx. quinquefasciatus.

关键词： Zanthoxylum limonella Aedes aepypti Culex quinquefasciatus Adulticide Larvicide Oviposition deterrent

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An in vitrostudy of the bioefifcacy of essential oil blends againstAedes aegypti (Linn.) andAnopheles dirus (Peyton and Harrison) by using membrane feeding apparatus

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Journal of Coastal Life Medicine 2017年第2期5卷 82-87页

作者： Nutthanun Auysawasdi Sawitri Chuntranuluck Vichien Keeratinijakal siriporn phasomkusolsil Silas A Davidson Department of Biotechnology Faculty of Agro-IndustryKasetsart University50 Ngam Wong Wan RoadLadyaowChatuchakBangkok 10900Thailand Department of Agronomy Faculty of AgricultureKasetsart University50 Ngam Wong Wan RoadLadyaowChatuchakBangkok 10900Thailand Department of Entomology Armed Forces Research Institute of Medical ScienceBangkok 10400Thailand

Objective:To determine the bioefficacy of plant essential oils on Aedes aegyptiandAnopheles dirus. Repellency was determined by measuring reduction in feeding and mortality. A novelin vitro bioassay apparatus was developed that had a sausage-casing membrane feeding system. Methods:Mixtures of three essential oils were evaluated: turmeric (Curcuma longa), eucalyptus (Eucalyptus globulus), and orange (Citrus aurantium). The oils were mixed in pairs or all together at equal volume for a total of 10% volume and then formulated with 90% virgin coconut oil. Completed formulations were evaluated with and without an additional 5% vanillin. The formulations were applied to the sausage casing membranes and female mosquitoes provided (expose) blood meals (0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5 and 4.0 h) to assess the percentage repellency over time. Results:The strongest repellency was at shorter exposure periods. ForAedesaegypti, the strongest feeding reduction was with the turmeric and eucalyptus combination and with the addition of vanillin (97.6%–99.6%). ForAnopheles dirus, the strongest repellency was when all three oils were combined (98.4%–99.6%). Conclusions:Vanillin increased the effects of repellency and mortality for all formulations and demonstrated an increased potential to enhance the bioefficacy of essential oil repellents. This study also demonstrated anin vitro membrane feeding system that can be used to screen essential oils.

关键词： Aedes aegypti Anopheles dirus Essential oil Repellent Membrane feeding system

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