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Postharvest disinfestation of mango (Mangifera indica cv. Manila) with
controlled atmospheres. |
| León, D.
M.,Ortega, D. A.,Cabrera, H.,Cruz, J. de la,Parkin, K.
L.,Garcia, H. S. |
| UNIDA,
Instituto Tecnológico de Veracruz, Apdo. Postal 1420, Veracruz, Ver.
91860, Mexico |
| Manila
mangoes were infested in the tree by allowing fertile Anastrepha obliqua
female flies to oviposit on fruits contained inside cages. Infested
mangoes were exposed to nine different controlled atmospheres (CA)
containing combinations of 1, 3, or 5% O2 and 30, 50, or 70% CO2.
Surviving larvae were enumerated after subjecting the mangoes to CA for
1 to 5 days. Selected compositional and physical parameters (weight
loss, pH, titratable acidity, colour, soluble solids, reducing sugars,
and texture) were analysed during post-treatment ripening. Fully ripened
fruits were also subject to sensory evaluation using a non-structured
hedonic scale and a trained panel. CA containing 1% O2 and either 30 or
50% CO2 effectively killed all larvae present in treated fruits. These
treatments did not alter the composition or sensory characteristics of
fully ripened mangoes. However, losses of 20 to 25% of fruits on the
basis of sensory acceptability were attributed to the development of
"spongy" tissue. CAs containing 70% CO2 were also effective in
disinfestation, but also affected compositional and sensory qualities
of the fruits and induced the "spongy" texture defect in 65% of the
fruits. |
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