Effect of summer pruning and gibberellin application on reduction of flower bud formation in "Saotome" peach (Prunus persica Batsch.) trees grafted on P. japonica rootstocks
1997
Mizutani, F. (Ehime Univ., Matsuyama (Japan). Coll. of Agriculture) | Rabbany, A.B.M.G. | Amano, S. | Hino, A. | Akiyoshi, H. | Kadoya, K.
Effect of summer pruning and GA3 application on reduction of flower bud formation was investigated by using a very early maturing peach cultivar "Saotome" trees grafted on P. japonica, which other wise bear excessive flower buds. Severe pruning, in which the shoots, 41 cm in average length, were cut back to 5 cm from the base, reduced the final shoot length but promoted vegetative bud formation. Light pruning, in which the shoots, 35 cm in average length, were cut back to 15 cm, had little effect on the final shoot length but increased the number and percentage of vegetative buds. GA3 application promoted shoot elongation and vegetative bud formation. The higher the GA3 concentration, the greater the effectiveness. GA3 application was superior to summer pruning in induction of vegetative buds. Thus, summer pruning and GA3 application after fruit harvest are effective measures to enhance vegetative bud formation in "Saotome" peach trees grafted on P. japonica
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