Bioefficacy of plant extracts of four plant species Azadirachta indica A. Juss., Eucalyptus obliqua L'Hér., Vitex negundo L. and Annona squamosa L.were evaluated for their antifeedant activity as well as field efficacy against Spodoptera litura Fab. A. indica, A. squamosa and V. negundoshowed 0.03, 0.04 and 0.05 g food utilization at 200 ppm concentration for A. indica whereas at 300 ppm concentration of both A. squamosa and V. negundo. The field efficacy was calculated by analysing the corrected mortality of targeted pest species and found both A. indicaand V. negundo were potent biopesticides over all four study areas however, A. squamosa showed moderate while E. obliqua revealed least results. Nevertheless, A. indica, A. squamosa and V. negundo are having effective pesticidal properties.