Bioefficacy studies of Canavalia cathartica Thouar seed methanol, ethyl acetate and hexane extracts against Spodoptera litura Fab. carried out to find out the impact on feeding, mortality, and duration showed cent per cent feeding deterrence activity in all the three extracts tested and methanol and ethyl acetate extracts showed 40 per cent mortality at cent per cent concentration. Among the reduced concentrations tested, Canavalia methanol extract imparted maximum feeding deterrence activity and larval mortality at 70% concentration. In Canavalia ethyl acetate extract the maximum feeding deterrence was recorded in 70% concentration (96.76%). The maximum larval mortality was recorded in 70%, 30% and 1% concentrations (66.66%) and highest pupation percentage was recorded in 5% concentration (66.66%). The maximum pupal malformation was recorded in 5% concentration (33.33%). In Canavalia hexane extract the maximum feeding deterrence was recorded in 70% concentration. The maximum larval mortality was recorded in 30% concentration and maximum pupation percentage was recorded in 1%. The results revealed that C. cathartica extract has the potential to be developed as an effective phyto insecticide.