Abstract
Two new University of Arkansas table grape cultivars, Reliance (25% Vitis vinifera L. x 75% Vitis labrusca L.) and Saturn (78% Vitis vinifera L. x 22% Vitis labrusca L.), were stored for seven and 10 weeks at 2°C in corrugated cardboard shipping containers with five packing treatments (slow, dual, and quick-release SO2 generators and lined and unlined controls). The SO2 treatments consisted of placing grapes in shipping containers lined with unvented polyethylene bags, laying commercially available SO2 generators on top of the grapes, and closing the bag. The lined control had a closed polyethylene bag surrounding the grapes but no SO2, while the unlined control had neither SO2 nor polyethylene bag. Reliance grapes had higher percentages of decay and shatter than Saturn grapes. Grapes stored with SO2 generators had less decay than the controls. The unlined control had more than four times the percentage weight loss of any other treatment. Flavor was similar among all treatments. The SO2 generators had no effect on color. Grapes that were wrapped and stored with no SO2 had the greatest amount of berry shatter. Grapes stored with the dual-release SO2 generators had less shatter than with the slow-release SO2 generators. Stem appearance was maintained by the slow-release and dual-release treatments. The use of SO2 generators had no effect on percentage soluble solids or pH.
- Received July 1991.
- Copyright 1992 by the American Society for Enology and Viticulture
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