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The effects of combination treatment with sulfur dioxide generating pad (SO2 pad) and modified atmosphere packaging (MAP) on grape quality were examined under simulated exporting condition and actual export to Los Angeles, USA. The ‘Campbell Early’ grape harvested in Hwaseong, Gyeonggi was precooled at 0°C, selected and packaged at 10°C, and stored at 0°C for 30 days. The treatment was as follows: general export packaging (control), only SO2 pad, combination of SO2 pad and MAP (perforated polyethylene film, SO2 pad+MA). In case of control and only SO2 pad under simulated exporting condition, the grape quality changes with storage time were decrease in hardness and brush length, increase in stem browning, and increased in shattering rate. The treatment of SO2 pad+MA was the most effective in preserving the grape quality since SO2 concentration inside the package remained around 2.9 ppm by MA film. Grape exports from harvest to local distribution of the USA took 30 days, and only SO2 pad+MA package showed no fungus, maintained brush length and rachis color, and was lowest at 4.0% of shattering rate since the concentration of SO2 in the package was about 4.0 ppm. As a result, it was considered that the combination of SO2 pad and MA was the most effective way to maintain freshness of grape during long-term marine transportation and extend the shelf-life in exporting countries.

han'gug sigpum jeojang yu'tong haghoeji/han-guk sikpum jeojang yutong hakoeji

Effects of combination treatment with sulfur dioxide generating pad and modified atmosphere packaging (MAP) on the quality of ‘Campbell Early’grape under simulated export conditions