Allium cepa, also known as bulb onion or common onion is the most widely consumed and cultivated vegetable across the world. Onion belongs to the family Amaryllidaceae and genus Allium. It is one of the most popular vegetable widely used in all households. Economic importance: Onion is the second most valuable vegetable, cultivated in at least 170 countries of the world including Pakistan (Iqram-ul-Haq and Sanum. 2015). Onion is of great economic importance in Pakistan. It is an important commercial