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Abstract
Onion (Allium cepa L.)botanically included in the Liliaceae and
species are circulating across a wide range of latitude s and altitudes in Europe,Asia,N.Am erica and Africa.World onion bulbs yield has remarkable increase at least 25%ove r the past 10 years with current production being around 55.025.127 m illion tonnes m aking it the second
most im portant horticultural crop afte r tomatoes.The average intake in the world is 7 kg per capita -1 .year -1 ,being Libya (32 kg per capita -1 .year-1 )and Turkey (27 kg per capita -1 .year -1 )the m ain consumers.In Egypt,onion is the third vegetable m ore consum ed (15 kg per capita -1 .year -1 ),after potato and tom atoes,and it is cultivated all over the country concentration in delta area and Uppe r Egypt (84.3 %of total area)and new land areas (15.7 %).The curre nt production area is being around 122,552 Feddan with total production 1.3 million ton.