Annals of Plant Protection Sciences

Adults of Sitophilus oryzae and Rhyzopertha dominica and adults and eggs of Corcyra cephalonica were exposed to essential oils of geranium, lemongrass and peppermint in the fumigation chamber. At 48 hrs exposure, complete mortality of adults of S. oryzae was recorded at 100 and 150 μl/250 ml of peppermint oil. Whereas, in case of R. dominica, 100% mortality was observed in all the doses (50, 100, 150 & 200 μl/250 ml). C. cephalonica was not sensitive to peppermint at 5 μl/250 ml.In the case of eggs (0–24 hrs old) of C. cephalonica, after 48 hrs of exposure, complete inhibition in hatching was recorded in all the doses of peppermint (25, 50, 100 & 150 μl), 50, 100 & 150 μl of lemongrass and 150 μl of geranium.