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KMID : 0903620000410030289
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Journal of the Korean Society for Horticultural Science
2000 Volume.41 No. 3 p.289 ~ p.291
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Effects of Application Time of Promalin on Tree Growth and Fruit Maturity of Pears
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김영호/Kim, Young Ho
임상철/이철희/최관순/김선규/김학현/윤철구/Lim, Sang Cheol/Lee, Cheol Hee/Choi, Kwan Soon/Kim, Seon Kyu/Kim, Hag Hyun/Youn, Cheol Ku
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Abstract
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To elucidate the effects of application time of Promalin on tree and fruit growth, fruit quality and maturity of ´Kamcheonbae´ and ´Whangkuembae´ pears, 18 ㎎·L^(-1) Promalin solution was foliar-sprayed 25, 35, and 45 days after full bloom (DAFB). Top growth was not affected by Promalin. Fruit stalk weight of ´Kamcheonbae´ was highest with 45 DAFB treatment. Fruit stalk diameter of ´Kamcheonbae´ increased as the application time was delayed while decreased by 25 DAFB treatment, and that of ´Whangkeumbae´ was slightly increased by 45 DAFB treatment. Fruit weight increased with the 45 DAFB treatment. Sugar concentration of ´Kamcheonbae´ was not much affected while that of ´Whangkeumbae´ was decreased with earlier treatments, and increased by 45 DAFB treatment. Sugar concentration was either decreased (Kamcheonbae) or increased (Whangkeumbae) by 25 DAFB treatment. Flesh firmness of ´Kamcheonbae´ was higher as the application time was delayed while that of ´Whangkeumbae´ was not significantly affected. Fruits of two cultivars matured 4 days earlier by Promalin. A sharp increase in fruit weight was shown from early July. However, fruit growth slowed down from early September and nearly ceased from mid-October in ´Whangkeumbae´. From the result of fruit weight increase by 45 DAFB treatment in the two cultivars, the end of cell division period was thought to be around 45 DAFB.
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