Asian Journal of Microbiology, Biotechnology & Environmental Sciences Paper

Vol 14, Issue 2, 2012; Page No.(187-191)

LARVICIDAL ACTIVITY OF CRUDE EXTRACTS OF UMBELLIFERAE PLANTS AGAINST DENGUE FEVER VECTOR MOSQUITO AEDES AEGYPTI

JOJO JOSEPH VELLANIKARAN AND A.P. THOMAS

Abstract

Mosquito menace in rural and urban India has reached alarming proportions. Improper urban development has compounded the problem. Extensive use of synthetic insecticides during the last few decades have resulted in environmental hazards and led to the development of physiological resistance in major vector species. Aedes aegypti is seen to transmit Dengue fever. From a selected twelve plant species of Umbelliferae family, extracts of five could induce significant mortality of A. aegypti larvae. Differential larvicidal activity was seen for various solvent extracts and both Hydrocotyle rotundifolia and Eryngium foetidum were found lethal to the larvae , the former was more effective. Synergic effect was observed when the crude extracts of H. rotundifolia and E.foetidum were used together. These two species are potential sources for larvicidal phytochemicals which may be used in mosquito control and eradication of Dengue fever. Crude extracts of three species - Ferula assa, Foetida, E. foetidum and H. rotundifolia exhibited potential larvicidal action. Development of safe biocides in future, may be done by isolation of the active principles from the crude extracts of Umbelliferae family.

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