ISHS Acta Horticulturae 80: Symposium on Growth Regulators in Fruit Production
INDUCTION OF PARTHENOCARPY IN APPLE AND PEAR WITH MIXTURES OF GROWTH REGULATORS |
| Author: | H. Jonkers |
| Abstract:
In 5 experiments with the apple cv. 'Cox's Orange Pippin' and the pear cv. 'Doyenné du Comice' destyled and control flowers were sprayed with a mixture of a gibberellin, an auxin and a cytokinin resulting in parthenocarpic fruits. The most effective time for the application of the spray to the apple was at 40% of flowering. Often these fruits were smaller than control ones, however, and longer in shape. If parthenocarpic fruits have to compete with seeded ones, they are shed easily. Whether such a spray may be economical on apples and pears after spring frosts or with lack of pollination is a remaining problem. | |
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