Abstract: This research reported the effects of 6 common plants extracts including neem and some others which have been never tested on the longevity of adults, the number of eggs laid and adult emergence of Callosobruchus maculatus. Six seed oils extracted by methylene chloride were tested: Azadirachta indica, Ricinus communis, Thevetia nerifolia, Balanites eagyptiaca, Moringa oleifera and Kaya senegalensis. All these oils reduce significantly survival of adults, oviposition and total emergence of adults. The most efficient is that of Thevetia nerifolia. At higher concentrations the treatment affects slightly the germination of seeds which remains over 50%. Seed oil of Thevetia nerifolia can be used as a good alternative to pesticides against Callosobruchus maculatus in addition with that of Azadirachta indica which effects are well established by many former works.