Fumigants are chemicals as gases, liquids and in solid formulations but act on insect and other pests in gaseous state. Fumigation is the action of releasing a toxic chemical in a gaseous state to control a target pest without contaminating the commodity treated. Fumigation plays a key role particularly in grain preservation as it controls insects developing inside and outside the grain and crawling and hidden pests. Phosphine gas (Aluminium Phosphide) is widely used worldwide for fumigating food grains and various other agriculture produces like wheat, corn, cotton, tobacco, soyabean, rice, nuts, baking products etc.,