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Stored commodities and their products are subjected to severe infestation due to the deleterious effect of insect pests. This study was designed to evaluate the effectiveness of six essential oils derived from indigenous medicinal plants (i.e., Melia azadirach, Achyranthus aspera, Sasurrea costus, Ferula narthex, Viola odorata and Linium usitatissium) as repellent, contact insecticidal and growth regulators against Tribolium castaneum, a serious pest of stored cereals. The results revealed that highest repellency 91.67% was observed in case of M. azadirach followed by A. aspera (85.00%) at 15% concentration. Minimum value of repellency was 35.00% and that was caused by V. odorata. Mortality was highest (9.30%) in M. azadirach treatment application, while minimum (0.78%) in case of A. aspera and that was at par with L. usitatissium (0.78%). Percent pupation was maximum in case of V. odorata and L. usitatissium and was minimum where M. azadirach treatment was done. The highest pupation inhibition was caused by M. azadirach oil application. The data showed that adult emergence was highest (98.34%) in L. usitatissium treatment application and was minimum (36.65%) in M. azadirach, followed by F. narthex (46.38%).

Essential Oils: A Viable Control Strategy to Ensure Safe Storage of Food Grains