Mosquito larvicidal activities of essential oils of Alpinia roxb. (Zingiberaceae)
The objective of the present study was to investigate the mosquito larvicidal activities of six Alpinia species on their toxic effects on Aedes albopictus (fourth instar larvae).From the study conducted, essential oils are rich sources of terpenoids mainly mono and sesquiterpenoids. All the tested species of Alpinia except A. purpurata exhibited potential larvicidal activity at higher concentrations of extracted essential oils. The result obtained in the present study indicates that the essential oils extracted from the rhizomes find wide application as eco-friendly larvicides.