Mosquito larvicidal activity of polar extracts from three Kotschya species against Anopheles gambiae s.s
Author(s): Innocent Daniel, Ester Innocent, Joseph Sempombe, Veronica Mugoyela and Baraka Samwel
Abstract: Anopheles gambiae is a main vector for transmission of malaria parasites. In endemic places, malaria contributes significantly to high mortalities and poverty. Synthetic insecticides command the widest application in malaria vector control but are non-biodegradable and currently facing resistance. In searching for alternative insecticides, this study evaluated the larvicidal potential of polar extracts from leaves and roots extract of Kotschya thymodora, Kotschya strigosa and Kotschya speciosa against Anopheles gambiae. The bioassay was done following WHO protocols (2005) in which 20 healthy third instars larvae were exposed to plant extracts of concentrations ranging from 12.5µg/mL to 200µg/mL for 48hours. Kotschya thymodora extracts exhibited the highest activity (LC50, leaves 16.35µg/mL, and roots 53.35µg/mL) followed by Kotschya strigosa (LC50, leaves 37.08µg/mL, and roots 237.31µg/mL) and Kotschya speciosa (LC50, leaves 75.85µg/mL, and roots 252.03µg/mL). The findings indicates that Kotschya species can serve as potential alternative source for safe and ecofriendly insecticides for malaria control.
How to cite this article:
Innocent Daniel, Ester Innocent, Joseph Sempombe, Veronica Mugoyela, Baraka Samwel. Mosquito larvicidal activity of polar extracts from three Kotschya species against Anopheles gambiae s.s. Int J Mosq Res 2020;7(3):29-33.