Management of vegetative growth in apple trees with bioregulators
Author: Don C. Elfving
Published: 2009
Summary: The objectives of this project were: 1. Explore possible methods for improving the efficacy of prohexadione-Ca (Apogee) for control of unwanted vegetative vigor, including application timing, combinations of Apogee with ethephon and/or other bioregulator products, such as abscisic acid (ABA), a bioregulator implicated in the initiation of dormancy. 2. Examine whether ABA can be used either alone or in combination with other bioregulators to force terminal bud set in growing shoots, thus controlling growth. 3. Evaluate the potential benefits for stimulation of latent bud growth on “blind wood” with high concentrations of cytokinins with or without supplemental gibberellic acid 4. Compare cyclanilide (Tiberon) with cytokinin/gibberellin products (e.g., Promalin) for induction of desired shoots at trellis wires during canopy development in sleeping-eye apple trees. 5. Examine fruiting in cyclanilide treated sleeping-eye trees to determine if this approach results 5. Examine fruiting in cyclanilide treated sleeping-eye trees to determine if this approach results
