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Repellent,larvicidal and adulticidal activities of essential oil from Dai medicinal plant Zingiber cassumunar against Aedes albopictus

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Plant Diversity 2021年第4期43卷 317-323页

作者： Ming-Xiang Li Yong-Peng Ma Hong-Xia Zhang Hong-Zheng Sun Hong-Hai Su Sheng-Ji Pei Zhi-Zhi Du Key Laboratory of Economic Plants and Biotechnology Yunnan Key Laboratory for Wild Plant ResourcesKunming Institute of BotanyChinese Academy of SciencesKunming650201China University of Chinese Academy of Sciences Beijing100049China Kunming City Center for Disease Control and Prevention Kunming650034China

Zingiber cassumunar is an important plant used in traditional medicine and as a natural mosquito re-pellent.However,the compounds responsible for the repellent activity of the plant are still unknown.The aim of the study is to identify the components of Z.cassumunar essential oil that show repellent activity against Aedes albopictus.We also evaluated the larvicidal and adulticidal activities of Z.cassumunar essential oil against Ae.albopictus.In-cage mosquito repellent experiments showed that Z.cassumunar essential oil possessed moderate repellent activity with a minimum effective dose(MED)of 0.16±0.01 mg/cm^(20,compared to reference standard N,N-diethyl-3-methylbenzamide(DEET,0.03±0.01 mg/cm^(20).Bioassay-guided fractionation identified the major active compound of Z.cassumunar essential oil as(-)-terpinen-4-ol(1)(MED:0.19±0 mg/cm^(20).We also found that Z.cassumunar essential oil showed moderate larvicidal activity against first instar larvae of Ae.albopictus with a LC50(50%lethal concentration)of 44.9 mg/L after 24 h.Fumigation bioassays showed that Z.cassumunar essential oil exhibits moderate adulticidal activity against Ae.albopictus with a LC50 of 5.44%,while(-)-terpinen-4-ol showed significant adulticidal activity with a LC50 of 2.10%after 24 h.This study verifies that the Z.cassumunar essential oil has mosquito repellent activity,and that(-)-terpinen-4-ol is mainly responsible for this activity.Furthermore,this study provides scientific support for the folk usage of Z.cassumunar essential oil as mosquito repellent and indicates that Z.cassumunar essential oil and(-)-terpinen-4-ol can be used as plant-derived repellents and insecticides for mosquito control.

关键词： Zingiber cassumunar Essential oil Repellent activity Larvicidal activity adulticidal activity (-)-Terpinen-4-ol

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Mosquito adulticidal properties of Delonix elata(Family:Fabaceae)against dengue vector,Aedes aegypti(Diptera:Culicidae)

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Journal of Coastal Life Medicine 2014年第5期2卷 389-393页

作者： Mohan Rajeswary Marimuthu Govindarajan Unit of Vector Biology and Phytochemistry Department of ZoologyAnnamalai UniversityAnnamalai Nagar-608002Tamil NaduIndia

Objective:To determine the adulticidal activity of hexane,benzene,chloroform,ethyl acetate and methanol leaf and seed extracts of Delonix elata(D.elata)against Aedes aegypti(Ae.aegypti).Methods:The bioassay was conducted in an experimental kit consisting of two cylindrical plastic tubes both measuring 125 mm×44 mm following the WHO method;mortality of the mosquitoes was recorded after 24 h.Results:The adulticidal activity of plant leaf and seed extracts showed moderate toxic effect on the adult mosquitoes after 24 h of exposure period.However,the highest adulticidal activity was observed in the leaf methanol extract of D.elata against Ae.aegypti with the LC_(50) and LC_(90) values 162.87 and 309.32 mg/L,respectively.Conclusions:From this result,it can be concluded the crude extract of D.elata was an excellent potential for controlling Ae.aegypti mosquitoes.

关键词： Delonix elata adulticidal activity Aedes aegypti

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