Estimated loss of total onion crop in developing
countries is high and can reach 20-95% (Anon, 1978). Post-harvest losses of
16-35% have been reported (Steppe, 1976). Exact data on the nature and extent
of these losses at each step in the postharvest chain is not readily available
in the literature However, losses of over 9% has been reported for Spring onion
between wholesale and retail (Amuttirantana and Passornsiri, 1992).