M. Madhavi and L. Mahesh
Objective: To explore the larvicidal activity of Pongamia pinnata leaf extracts against the Aedes vittatus, an emerging
Methods: Secondary metabolites from the leaves of P. pinnata were extracted using Water, Methanol, Ethanol, Hexane, and Acetone as solvents. From each extract, 5 different concentrations (50, 100, 150, 200, 250 PPMs) were prepared and tested for their larvicidal efficacy against the 4th instars of Aedes vittatus under laboratory conditions.
Results: All the extracts collected by using different solvents showed good larvicidal effects after 24 hours of exposure. However, the highest larval mortality was found in the methanolic extract of P. pinnata leaves followed by aqueous, ethanolic, hexane, and acetone extracts in the same order. Dose-dependent responses were observed. Mortality percentages of 100%, 98.33%, 83.33, 81.66%, and 76.66% were obtained by methanolic, Aqueous, ethanolic, hexane, and acetone extracts, respectively.
Conclusions: The Methanolic and aqueous extracts of P. pinnata leaves were proven to possess efficacy as ideal larvicides against the larvae of Ae. vittatus. Hence, the leaf extract of P. pinnata may be used to control this emerging threat to human health.
M. Madhavi and L. Mahesh, 2023. Efficacy of Pongamia pinnata Leaf Extracts Against Fourth-Instar Larvae of Aedes vittatus (Insecta: Diptera: Culicidae). Journal of Medical Arthropodology & Public Health 3(1): 23–34.