Development of postharvest technology for improving quality of baby corn for export
1994
Saichol Ketsa | Apaporn Meenaphan (Kasetsart Univ., Bangkok (Thailand). Faculty of Agriculture. Dept. to Horticulture)
Control of browning and decay of three cultivars of baby corn were studied in relation to their postharvest changes and quality. Baby corn cv. Chiang Mai 90 had greater browning than cvs. CP 45 and Pacific No. 5. Browning appearance of baby corn did not have relationship with L value, while did with weight loss, polyphenol oxidase (PPO) activity and total phenol content. Baby corn cv. CP 45 had the greatest decay after 6-day storage at ambient temperature. NaOCl at 100, 200 and 300 ppm completely stopped decay of baby corn cv. CP 45 for the first 4-day storage and had the least decay by the end of storage as compared to the control. NaOCl treatment had no significant effect on color and total sugars of baby corn. Ascorbic acid and Eribate at 0.05, 0.1 and Cacl2 at 0.5, 1.0 and 2.0 percent were tested to control browning of baby corn cv. CP 45. Only Eribate at 0.2 percent had the most effective in reducing browning of baby corn and all concentrations of ascorbic acid, Eribate and CaCl2 had no significant effect on L-value, weight loss and total phenols, but reduced PPO activity. The storage of baby corn cvs. CP 45 and G 5406 with husk at 3, 5, 7 and 9 C found that CP 45 had more browning, L value and total sugars content than cv. G 5406. Browning and weight loss were greater at higher temperature, while total sugars content was greater at lower temperature. Baby corn cvs. CP 45 and G 5406 had shelf life of 8 and 16 days at temperature of 3-7C, respectively. Phenylalanine ammonia-lyase activity in baby corn was very low.
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