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Predicting market life for 'O'Henry' and 'Elegant Lady' peaches under controlled atmosphere conditions.

Crisosto, C. H.; Garner, D.; Cid, L.;

Postharvest Horticulture Series - Department of Pomology, University of California Year: 1997 Issue: No. 17 Pages: 121-131

1997

บทคัดย่อ

Predicting market life for 'O'Henry' and 'Elegant Lady' peaches under controlled atmosphere conditions.

During the 1995 season, large (approx equal to 275 g), medium (approx equal to 175 g) and small (approx equal to 125 g) O'Henry peaches were stored in either air, 5% CO2 + 2% O2 or 17% CO2 + 6% O2 at 3.3 deg C. The onset of internal breakdown (IB) symptoms was related to both fruit size and storage atmosphere. Large fruits developed mealiness [woolliness] and flesh browning symptoms earlier than medium and small fruits. Large fruits benefited most from the 17% CO2 + 6% O2 treatment which increased their market life 10 days beyond that of the 5% CO2 + 2% O2 or air storage atmosphere treatments. In all cases, mealiness was observed before the development of flesh browning. Thus, market life was dependent on the incidence of mealiness rather than flesh browning. During the 1996 season, large, medium and small Elegant Lady and O'Henry peaches were stored in air or 17% CO2 + 6% O2 at either 0 deg or 3.3 deg . Fruit size, storage atmosphere and temperature all had significant effects on market life. S

mall Elegant Lady fruits stored in air at 0 deg had 14 days longer market life than large fruits. At 0 deg , large Elegant Lady fruits had a market life of 19 days under CA and 9 days in air storage. At 3.3 deg , market life for all treatments was reduced. At this temperature, large Elegant Lady fruits had 7 more days of market life under CA than in air storage. However, at 3.3 deg small Elegant Lady fruits in CA had a shorter market life than air-stored fruits. The results suggest that 17% CO2 + 6% O2 may be inducing problems in small fruits. A computer program was developed to predict the performance of these 2 peach cultivars under air or CA (17% CO2 + 6% O2) storage conditions.