Invitro screening of leaf extracts of selected plants from Lamiaceae, Asteraceae and Fabaceae against the mortality and repellency to Odoiporus longicollis (Olivier)

Abstract

A study was focused on biocidal and repellent efficiencies of leaf extracts of Chromolaena odorata (L) (Asteraceae), Gliricidia sepium (Jacq.) (Fabaceae), Coleus aromaticus Benth, Hyptis suaveolens (L.)Poit. (Lamiaceae) and Artemisia vulgaris L. (Asteraceae), against Odoiporus longicollis, banana pseudostem weevil. Ethanol leaf extracts of the above plants were primarily analysed for the mortality and repellency activity, the results showed that among the extracts G. sepium was most effective. Further G. sepium in various solvents like petroleum ether, chloroform, ethyl acetate, ethanol and water were analysed for the biocidal and repellency assays, and found that, the ethyl acetate solvent of G. sepium elicited maximum effectiveness. The ethyl acetate extract of G. sepium is found as a promising biopesticide.