The effects of combined treatments of shrink wrapping, curing, quarantine heat disinfestation tretment and modified atmosphere packaging (MAP) on the
storage life of Washington navel and Valencia oranges were investigated. Washington navel oranges showed severe heat injury in response to MAP
treatments. In contrast, Valencia oranges showed no symptoms of heat injury. Shrink wrapping and curing significantly (P
MAP significantly increased (P < 0.05) Stem Ene! Rot (Phomopsis cirri) in Washington navel oranges but, it had no effect on Valencia oranges. Quarantine
heat disinfestation treatment had no significant effect on disease control and fruit quality. Ethanol concentrations in MAP in both cultivars were significantly (P
higher than other treatments but, addition of ethylene absorbent to the MAP, the percentage of ethanol in Washington navel oranges significantly (P
reduced. In general, the combined treatments of shrink wrapping, curing, quarantine heat disinfestation treatment and MAP adversely affected flavour, pee! colour and
increased ethanol concentrations in both cultivars. In contrast, this treatment in the
absence of MAP had no adverse effect on fruit quality, flavour and overalI acceptability in both cultivars after 4 and 8 weeks storage. A negative correlation
betWeen ethanol concentrations and flavour and overalI acceptability scores was observed in both cultivars but, this correlation was significant (P<0.05) only between
ethanol concentrations and overalI acceptability in Valencia oranges.
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