Onion (Allium cepa L) is one of the important condiments widely used in all households all the year round. The green leaves and immature and mature bulbs are eaten raw or used in preparation of vegetables. Onions are used in soups, sauces and for seasoning foods. The small bulbs one pickled in vinegar. Recent research has suggested that onions in the diet may play a part in preventing heat disease and other ailments. Onion bulb is rich in phosphorus, calcium and carbohydrates. The pungency in onion is due to a volatile oil known as ally-propyl disulphide.