Insecticidal and Oviposition Deterrent Activity of Some Plant Extracts Against Cowpea Beetle Callosobruchus Maculatus (F.) (Coleoptera: Bruchidae)

Different solvent extracts (hexane, dichloromethane, ethyl acetate and water) of eight plants were evaluated for their insecticidal and oviposition deterrent activity against Callosobruchus maculatus. Hexane extract of Swientenia mahagoni (8.8±3.96) and Pedalium murex (21.4±12.34), dichloromethane extract of Diospyros ovalifolia (12.8±4.65) and P. murex (12.2±8.16), ethyl acetate extract of Prosopis juliflora (8.6±4.15) and Calophyllum inophyllum (8.8±7.59), water extract of Artemisia pallens (10.4±6.12) and D. ovalifolia (14.8±8.22) exhibited the maximum oviposition deterrent activity. Insecticidal activity was maximum in hexane extract of P. murex (65.6%), dichloromethane extract of P. juliflora (58.4%), ethyl acetate extract of S. mahagoni (59.2%) and water extract of P. murex (44.6%) and other plant extracts tested showed 3.0 to 41.6% of mortality.