USING ETHEPHON AND DAMINOZIDE TO REGULATE GROWTH AND INITIATE FLOWER BUDS ON BEARING RED DELICIOUS TREES.

K.M. Jones, T.B. Koen, M.J. Oakford, S.J. Longley
Two trials explored the relationship between growth control and flower bud initiation. The trees, fruit bearing Hi-Early Red Delicious, were sprayed in mid-November with ethephon or daminozide alone or combinations of both with the objectives of retarding growth and promoting flower bud initiation.

Regulation of growth was achieved by all chemical treatments in both trials and a negative linear relationship was shown between growth and flower bud initiation for Red Delicious. Overthinning occurred when ethephon at 500 or 750 ppm was used but there were no significant effects on fruit size.

The work concludes that regulating growth using ethephon or ethephon-daminozide combinations can encourage flower bud formation on bearing trees without significantly affecting production in the current year.

Jones, K.M., Koen, T.B., Oakford, M.J. and Longley, S.J. (1989). USING ETHEPHON AND DAMINOZIDE TO REGULATE GROWTH AND INITIATE FLOWER BUDS ON BEARING RED DELICIOUS TREES.. Acta Hortic. 240, 185-188
DOI: 10.17660/ActaHortic.1989.240.33
https://doi.org/10.17660/ActaHortic.1989.240.33

Acta Horticulturae