ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Package and storage time influences postharvest quality of table grapes.

Perkins-Veazie, P.; Collins, J.; Lloyd, J.; Striegler, K.;

Proceedings of the Annual Meeting - Arkansas State Horticultural Society, 1989. Year: 1990 Issue: No. 110 Pages: 106-112 Ref: 6 ref.

1990

บทคัดย่อ

Grapes of the cultivars Venus, Reliance and Saturn were harvested at optimum maturity and sorted to eliminate clusters with split, mouldy or immature berries. Seven types of package, each holding about 1 lb, were compared as follows: cardboard boxes either waxed, unwaxed or unwaxed and covered by shrink-wrap plastic; plastic bags with slits; plastic dome-lid boxes with vent holes; wood splint boxes; and purple net bags. The packages were placed in cardboard lugs and stored at around 2 deg C and 85% RH for 6 weeks. At weekly intervals, packages were weighed and berries which had fallen from the cluster (shattered) were counted and weighed (except those in the purple net bags). For each cultivar, grapes held in the unwaxed boxes with a shrink-wrap overlay and those in the lidded plastic boxes had the lowest % weight loss. After 6 weeks, Venus grapes showed softening and leakage, symptomatic of senescence, even with berries that had relatively little weight loss. Saturn grapes had little shatter after 6 weeks, regardless of the package type. Grapes held in boxes with shrink-wrap had the least shatter for both Venus and Reliance after 6 weeks of storage. Those in plastic slit bags and purple net bags showed a high % shatter, even with minimal handling. Differences in mean weight loss and shatter between the cultivars became evident after 3 weeks of storage, when averaged for all packages. Saturn grapes had least weight loss and shatter; Venus showed a large increase in shatter after 4 weeks, whereas Reliance grapes showed a steady rate of shatter throughout the storage period. Saturn showed the greatest potential for long-distance shipment and for storage up to 6 weeks without SO2.