Corcyra cephalonica Stainton is a notorious pest of stored cereals and cereal commodities in India as well as in other tropical and subtropical regions of the world. An experiment was conducted on extent of damage of C. cephalonica in maize under different storage structures during, 2010-2011, revealed that the maximum infested grain samples (61.53%) were recorded from grain stored in loose storage during June-July, 2011. Whereas, infested grain samples were not found from the grain stored in metal bin during November-December, 2010. The maximum weight loss (7.46%) was recorded in grain samples collected from loose storage in Udaipur district during June-July, 2011. No weight loss in grains were recorded in the samples collected from metal bin in Chittorgarh and Udaipur district during November-December 2010. In the quantitative and qualitative studies conducted in the selected districts observed that the maximum

germination (78.00%) and protein content (8.60%) were recorded in the samples collected from metal bin in Chittorgarh district during November-December, 2010, while maximum carbohydrate content (72.00%) was recorded in maize samples collected from metal bin in Rajsamand district during November-December 2010. The minimum germination (62.00%) and carbohydrate content (66.50%) were recorded in maize

samples collected from loose storage in Udaipur district; whereas, minimum protein content (6.70%) was recorded from loose storage in Chittorgarh district during June-July 2011. The studies conducted on efficacy of different grain protectants against C. cephalonica revealed that the highest larval mortality (82.20%), pupal mortality (10.00%) and minimum adult emergence (6.00%) were recorded in case of application neem leaf powder at 10g/kg seed, after 40 days of release. Application of wood ash at 15g/kg seed was found least effective.