Branching Responses of Young Apple Trees to Applications of 6-Benzylamino purine and Gibberellin A4 + 71

in Journal of the American Society for Horticultural Science
Author: C. G. Forshey1
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  • 1 Hudson Valley Laboratory, Highland, NY 12528


Applications of 6-benzylamino purine (BA) and gibberellin A4 + 7 (GA4 + 7) over a period of 3 years significantly increased primary and secondary branching and total shoot growth of 6 apple cultivars (Malus domestica Borkh.) from the first through the fourth growing seasons in the field. In spur-type ‘Delicious’ and ‘McIntosh’, BA + GA4 + 7 was more effective than deblossoming, pruning, or branch spreading in inducing lateral branching.

Contributor Notes

Received for publication Oct. 16, 1981. Approved by the Director of the New York State Agricultural Experiment Station for publication as Journal Paper No. 3386.

The cost of publishing this paper was defrayed in part by the payment of page charges. Under postal regulations, this paper therefore must be hereby marked advertisement solely to indicate this fact.

Professor of Pomology.