ISHS Acta Horticulturae 395: Dormancy and the related Problems of Deciduous Fruit Trees
EFFECT OF SOME PRACTICES AND HYDROGEN CYANAMIDE ON BUD BREAK OF 'SHINSEIKI' PEAR |
| Authors: | K. Krisanapook, S. Subhadrabandhu |
| Keywords: | Bud break, chilling requirement, dormancy, hydrogen cyanamide, Pyrus Pyrifolia |
| Abstract:
Shoots from 'Shinseiki' pear grafted onto the low chilling Asian pear growing on the Ang Khang Royal Station in Chiang Mai Province of Thailand were removed from trees and grafted to 'Yokoyama Wase', a low chilling pear cultivar. One half of the shoots were chilled at 11°C for 168 hours before grafting. After grafting, a 2.5% hydrogen cyanamide (H2CN2) solution was painted or sprayed on both the chilled and non-chilled buds. All treatments increased bud break. Bud break on shoots that were chilled before grafting had the highest percentage bud break (100%). Treating buds with hydrogen cyanamide also increased bud break, but its effect was less when applied to chilled buds. Furthermore, the application of hydrogen cyanamide by spray resulted in lower levels of bud break when compared to painting. Hydrogen cyanamide toxicity was greater in chilled buds, and spraying produced a greater number of dead shoots than did painting. | |
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