Mosquitocidial activities of Spathodea campanulata methanolic leaf extract against the dengue vector Aedes aegypti

Mosquitoes are important vectors of etiological agents of diseases to humans and domestic animals. The present study aimed to investigate larvicidal, pupicidal, ovicidal and ovipositional deterrent activity of methanol leaves extract of Spathodea campanulata against Aedes aegypti. The methanolic leaf extract of S. campanulata were found most effective with LC50 and LC90 values. The decrease in hatchability was found to be dose dependent. The mosquitoes were subjected to choice- oviposition test and no- choice oviposition test. The extract showed oviposition deterrence and effective repellence against Aedes aegypti at different concentrations, with the observation on that maximal eggs were laid in low concentration of the extract and control. These results suggest that the methanolic leaf extract of S. campanulata have the potential to be used as an ideal ecofriendly approach for the control of mosquitoes.

Author(s): Kandasamy Karthika Devi, Ramanathapuram Sundaram Mohanraj* and Balasubramaniam Dhanakkodi

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