Topical treatment of varied concentrations of Ocimum canum and Tridax proccumbens leaf extracts was studied against the varied larvae of groundnut pod borer, Tribolium castaneum. All the concentrations (0.25, 0.50, 0.75 and 1%) effectively caused varied percentage deaths in all larval age groups. Both leaf extracts caused more than 50% larval mortality at two higher concentrations (0.75 and 1.0%). It was evident that the early instar larvae (12 days & 14 days) were more susceptible than the late larval instars (16 days & 18 days) to both leaf extracts of all concentrations tested. Larval mortality increased with concomitant increase in the dose leaf extracts of all concentrations tested. The dose dependent studies revealed that 0.75% of Ocimum canum leaf extract was found to be the more potential causing percent larval mortality, which ranged from 70 to 82%.