2000, Volume 11, Number 1

December Pruning of Vegetative Flushes Affects Flowering of 'Kaimana' Lychee in Hawai`i

Mike A. Nagao, Elodie B. Ho-a, Melvin S. Nishina, Francis Zee

Vegetative flushing in late autumn and early winter is associated with irregular flowering of lychee (Litchi chinenesis Sonn) trees during spring and can result in inconsistent yields. This study was conducted to determine if pruning of vegetative flushes emerging on 'Kaimana' lychee trees in early winter could enhance spring flowering. Results of this study showed that vegetative flushing during the winter reduced flowering of Kaimana trees and that pruning of young flushes, which emerged during early December, stimulated flowering. Pruning of emerging vegetative flushes significantly increased the number of panicles developing on trees in February compared to trees on which flushing branches were left unpruned. Pruning also increased the number of panicles developing on each pruned branch by stimulating the production of multiple inflorescences from nodes located immediately below the pruned terminal.

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