Piga, Antonio <1965- > and D'Aquino, Salvatore and Agabbio, Mario Carlo Salvatore and Papoff, Claudio (1995) Influenza del confezionamento con film plastici sulla conservazione del fico. Italus Hortus, Vol. 5-6 (2), p. 3-7. ISSN 1127-3496. Article.
The influence of film packaging on keeping quality
attributes of Niedda longa fig fruit was studied. Fresh huits harvested at the eating stage were placed in polystyrene trays (15 fruits per tray) and equally divided into 4 treatments groups of 48 trays each. One of the groups was manually overwrapped with a 15 μm thickness extensible PVC film (CX), while other two groups were packaged either with a 15 or 19 μm polyolefinic heat-shrinkable films (MD). Unwrapped
fruit served as control. After packaging the fruits were
stored 16 days at 0 °C and 95% relative humidity (RH). At
4 days interval 12 trays per group were transferred for 3 days at 20°C and 75% RH to simulate merchandising conditions
(shelf-life). Following each 4 days storage interval and after shelf-life periods, sound fruit were subjectively evaluated for overall appearance and taste, rating with a 0 to 9 scale for the former and a 0 to 5 one for the latter. At harvest and at the above cited periods chemical analyses including pH, total soluble solid content (TSS) and juice titratable acidity, were performed on three replicates of 10 sound fruits. Decay was expressed as a percentage. Plastic film strongly lowered weight loss due to transpiration and give better overall appearance
to wrapped fruit as compared to unwrapped one, as the
latter showed shrivelling due to moisture loss. No appreciable differences in weight loss and overall appearance were found between CX and MD wrapped fruit. A slight deterioration of external appearance was evidenced at the end of each shelf-life period regardless of the previous cold storage regime, althoughsound fruits were never judged unacceptable. Moreover, wrapped fruits showed a small off-flavour and off-odour production. Cold storage was effective in reducing rots, while a drastic increase in decay incidence was noticed during the shelf-life period, the wrapped fruit showing the highest percentage
of rots. Internal quality parameters underwent slight
modifications, albeit TSS were lower in wrapped than unwrapped fruit. Thus, in conclusion we point out that matching appropriate film wrapping with cold storage conditions may be beneficial in extending the postharvest life of figs and enabling to transport fresh fruits to more distant markets as well.
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