Insecticidal activity of eight plant species on egg laying, larval development and adult emergence of Callosobruchus maculatus (F.) in cowpea

Abstract

Freeze dried powdered leaves of Cymbopogum citratus (DC) Stapf, Cinnamomum camphora (L.) Nee & Eberm Ipomoea mauritiana Jacq. Tamarandus indicus L., Lantana camara L., Myroxylon balsumum (L.) Harm, Citrus aurantium L. and Vitex altisima L. were tested against Callosobruchus maculatus under nochoice and choice situations. Under no-choice situation, V. altisima at the rate of 5.0% w/w was highly effective as an ovipositional deterrent while T. indicus was effective as a larvicide. T. indicus tested under choice situation at the rate of 1.0 % w/w, was effective as an ovipositional deterrent as well as a repellant. V. altisima tested at the same rate, was effective only as an ovipositional deterrent.