Langdon (1987) reported that several chemical compounds such as ascorbic and citric acid inhibit enzymatic browning of potato slices. Oxalic acid is a natural component of a large number of plants such as spinach, broccoli, tomato and turnip (USDA/HMS, 1984) and appears to inhibit enzymatic browning. The main purpose of this study was to find an effective anti-browning agent such as ascorbic, citric and oxalic acid, to combine with ozone treatment as an alternative treatment to SO2 fumigation and to reduce postharvest decay, pericarp browning, and maintain the quality