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KMID : 0903619970380060725
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Journal of the Korean Society for Horticultural Science
1997 Volume.38 No. 6 p.725 ~ p.729
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Preharvest Factors Affecting the Incidence of Physiological Disorders during CA Storage of ´ Fuji ´ Apples
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유언하/Ryu, Oun Ha
박윤문/김호열/권헌중/Park, Youn Moon/Kim, Ho Yul/Kweon, Hun Jung
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Abstract
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The study was conducted to elucidate the effects of preharvest factors on the incidence of physiological disorders during CA storage of ´Fuji´ apples. Apples were harvested at different maturity and stored under standard CA conditions, 2-3% oxygen plus 2-3% carbon dioxide, at -0.5∼0.5℃ for five months. ´Fuji´ apples stored in CA showed four different symptoms of physiological disorders; low-oxygen injury, carbon dioxide injury, high carbon dioxide and low-oxygen combined injury, and watercore breakdown. Among them, the typical symptom was the high carbon dioxide and low-oxygen combined injury. Large variations in the incidence of CA disorder were observed by storage seasons and locality. When harvested at optimum maturity, the incidence ranged from 4.5 to 22.3% in 1991-1994 storage seasons. The incidence of internal breakdown, however, remarkably increased when more mature apples were stored in CA. Apples harvested at predicted optimum maturity showed 14% in 1992-93 season and no incidence in 1996-97 season. In contrast, overmature apples showed high incidence up to 67% after 5 month standard CA storage. No definite correlation was observed between the severity of watercore at harvest and the incidence of internal breakdown after CA storage. Fruit bagging during fruit growth and development appeared to reduce the incidence of CA storage disorder. Small apples were less susceptible to the disorder.
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KEYWORD
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