The present investigation was conducted to evaluate the insecticidal and delayed effects of flowers, leaves and stems extracts of Cafendufa officfnefis plant on the 4th instar larvae of Spodoptere fittorefr's (Boisd). The four crude extractions (chloroform, dichloromethane. ethanol and hexane) for each part of the plant proved high insecticidal activity against the cotton leaf worm larvae by using the residual thin film technique. All extracts had no toxic effect on the same larvae with leaf-dipping technique. Residual thin-film treatment of larvae with all extracts produced high larval and total mortality. low percentage of adult emergence and sterility. Feeding treatments reduced the pupal weight. fecundity of emerged adult females. and hatchability of deposited eggs by these females, which was reflected in high percentage of sterility. These delayed latent effects were more pronounced in treatments of larvae with dichloromethane extracts. Negligible phytotoxicity of the formulation of dichloromethane and chloroform extracts on cotton plants. The second instar larvae were more susceptible to the effect of the formulated extracts than that of the fourth instar. Keywords: Plant extracts, Cafeno'ufe officfnafis, Spodopfere littorafr's. insecticidal activities, delayed latent effects.