Efficacy of volatile oils, powders, ethanol extracts and water extracts were tested on the basis of per cent mortality, final adult population of Sitophilus oryzae and grain weight loss of rice. Volatile oil of Citrus reticulata resulted in 100.00 per cent mortality after 24 hours of exposure followed by Curcuma longa (90.00 per cent), Psidium guajava (52.50 per cent) and Pogostemon cablin (20.00 per cent). Among powders, powder of Zingiber officinale was proved to be effective to some extent resulting in 23.34 per cent mortality followed by P. guajava and C. reticulata at 6.67 per cent respectively after 72 hours of exposure. However, powders of C. reticulata and Z. officinale were comparatively effective in reducing the adult population 12.67 respectively and grain weight loss at 4.35 and 4.50 per cent respectively after 35 days of exposure. Ethanol extract of P. cablin was found to be effective to some extent resulting in 40.00 per cent mortality after 72 hours of exposure while the extract of C. reticulata was comparatively effective in reducing the adult population (12.00) and grain weight loss (3.49 percent) after 35 days of exposure. Though water extracts of different plant parts had no significant effect on mortality of the pest but Polygonum sp. was found to be effective in reducing adult population (12.33) and grain weight loss (5.01 per cent) after 35 days of exposure.