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.
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.
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