Larvicidal efficacy of essential oils from the rhizomes of Zingiber castaneum against Aedes albopictus

Abstract

In this paper, we report the larvicidal activity of essential oils from the rhizomes of Zingiber castaneum Skornick & Q.B Nguyen growing in Vietnam. Essential oils were obtained from the pseudo-stem by hydro distillation conducted by using Clevenger apparatus. The mortality and larvicidal effects of the essential oil on fourth-instar larvae of Aedes were evaluated by the established protocol of the World Health Organization (WHO). The rhizome oil of Z. castaneum exhibited 100% mortality towards Ae albopictus at concentration of 100 µg/mL after 24 h and 48 h test period. In addition, the essential oil displayed larvicidal activity against Ae albopictus with minimum lethal concentration LC50 values of 49.85 µg/mL and 43.93 µg/mL at 24 h and 48 h respectively.