Volume 55 Number 1 Article 7
Year 2001 Month 1
Title: Gibberellic Acid Bloom Sprays Reduce Fruit Set and Improve Packable Yield of ŽAutumn Royal` Table Grapes
Authors: N.K. Dokoozlian, N.C. Ebisuda and J.M. Hashim
Abstract:
A three-year study (1997-1999) examined the effects of gibberellic acid (0, 5, 10, 15 or 20 g ha-1
GA3) applied at bloom (approximately 80% capfall) on the berry growth, fruit composition and productivity of 'Autumn Royal' table grapes (Vitis vinifera L.). The results indicate that 5 g ha-1 GA3 was
the optimum treatment for this cultivar, significantly reducing berry set and cluster compactness, as well
as the amount of fruit per vine with bunch rot, compared to the control.
This treatment also increased
berry length and reduced the number of seed traces per berry, but had no effect on berry weight or diameter.
The packable yield of vines treated with 5 g ha-1 GA3 were either similar to or significantly
greater than the control, while rates ≥ 10 g ha-1 reduced vine productivity and fruit growth, and were
therefore unacceptable.
Full text download: APS subscribers
ISHS members & pay-per-view
(PDF 818672 bytes)
Translate:
APS membership administration
ISHS membership administration
