Storage practices which help us to overcome food insecurity are greatly undetermined by varieties of factors. Post-harvest loss caused by unscientific storage, insects, rodents, microorganisms etc., are the main reasons for major food grain loss. Among them, insects play a major role. About 500 species of insects have been associated with stored grain products and nearly 100 species among them cause economic loss. Management of these insects relies heavily on the use of synthetic insecticides and fumigants, which resulted in many environmental and efficacy deterioration. Phyto insecticides are mooted as alternatives for effective and safe management of stored insects. Acorus calamus Linn. is one of the important phyto-insecticide which is known to possess wide variety of anti-insect properties. Still their commercial use is highly restricted due non availability of formulations. Hence, Essential oil emulsion formulation of A. calamus Linn. essential oil has been attempted. The results clearly indicated the supremacy of the formulations in effectively controlling the pulse beetle. When the essential oil emulsion formulation was tested, the highest mortality and FDI were observed in 10 and 7% concentrations at 200µL dose (98.32%; 93.32% and 75.45;70.04 respectively). It is also significantly reduced oviposition and progeny production of C. maculatus. Weight loss was also found to be significantly reduced.