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http://dx.doi.org/10.5338/KJEA.2014.33.3.198

Factors Associated with the Occurrence of Fruit Skin Stain during Growing Period in 'Niitaka' Pear  

Moon, Byung-Woo (R&D Center, M.Horticultural Technique Research Institute)
Nam, Ki-Woong (Department of Horticultural Science, Hankyong National University)
Moon, Young-Ji (R&D Center, M.Horticultural Technique Research Institute)
Publication Information
Korean Journal of Environmental Agriculture / v.33, no.3, 2014 , pp. 198-204 More about this Journal
Abstract
BACKGROUND: Caused by cultural environment, the fruit skin stain results in serious damages to pear fruit. Particularly susceptible to this damage, 'Niitaka' pear accounts for 82% of pear cultivation in Korea and many farmers growing the pear trees have suffered economic losses due to fruit skin stain. This study investigated the effect of different treatments of 'Niitaka' pear during growing period on the occurrence of fruit skin stain. METHODS AND RESULTS: The treatments in the field included gibberellin (GA) paste, spraying with amino acid tree fertilizer, functional bagging, and coating of the inner paper bag with agents. The relationships between tree vigor, mineral nutrition concentration and fruit skin stain occurrence were also investigated. The fruit skin stain symptoms occurred from young fruit (May 25) until harvest. There was no exposed fruit flesh. The occurrence of fruit skin stain was significantly reduced in normal tree (shoot length 110 cm), as well as using GA paste treatment, and bagging in calcium and lime sulfur coated bags. However, spraying with amino acid tree fertilizer made no difference in comparison to control. In addition, bags in which the inner paper was coated with lime sulfur and soybean oil resulted in chemical injury to the fruit skin caused by bagging. The K concentration of shoot wood and fruit skin were higher than those of the control. Also, there were lower T-N, K concentration of leaf. CONCLUSION: These results suggest that occurrence of fruit skin stain in 'Niitaka' pear fruits during the growing period can be reduced by GA paste and bagging in calcium and lime sulfur coated bags. The symptoms of chemical injury to the fruit skin caused by bagging in lime sulfur and soybean oil coated inner paper were different compared to skin stain occurring in fruit during the growing period.
Keywords
Coating agent; Fruit skin stain; Gibberellin paste; Lime sulfur; Niitaka pear;
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Times Cited By KSCI : 11  (Citation Analysis)
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