PARTIALLY PURIFIED EXTRACT OF RICINUS COMMUNIS AGAINST DEVELOPMENTAL STAGES OF AEDES AEGYPTI (CULICIDAE: DIPTERA)

Abstract

The present study has been taken to study the insecticidal properties of botanical,Ricinus communis on the growth and development of the Chikungunya vector mosquito, Aedes aegypti. Mortality value of egg, larvae and pupae treated with different concentration of the partially purifiedseed extract of Ricinus communis was observed at the end of 24 hours of exposure. The results revealed that the plant, Ricinus communisshowed better response against the developmental stages on the mosquito. All of these studies of the effect of plant extracts on the mosquito susceptibility showed that Ricinus communis may cause death by
acting as neurotoxicants on respiratory toxicants by inhibiting the flow of nerve impulse and decrease in oxygen uptake ultimately resulting in death. The preliminary phytochemical analysis shows the presence of certain secondary metabolites like alkaloids, flavonoids in the extracts of experimental plant,Ricinus
communis. As the alkaloids, flavonoids are known to have effective mosquitocidal properties. It indicates that the extract ofRicinus communisis most reliable and effective in terms of mosquitocidalproperties.