Abstract
The objective of this work was to evaluate the effect of ethephon and of abscisic acid (ABA) application timing on the color of 'Rubi' Table grape. Eight treatments were evaluated: control, without application; ethephon 500 mg L‑1 applied seven days after veraison (7 DAV); and two concentrations of ABA (200 and 400 mg L‑1) arranged with three application timings at 7 DAV, at 15 days before harvest (DBH), and at 7 DAV + 15 DBH. ABA does not modify physical‑chemical characteristics of the cluster and improves the color of grapes, especially when applied twice (7 DAV + 15 DBH) at the concentration of 400 mg L‑1.
Highlights
Uso do etefon e épocas de aplicação do ácido abscísico para melhorar a cor da uva de mesa 'Rubi'
The accumulation of anthocyanins begins at veraison and seems to be regulated, at least partially, by abscisic acid (ABA) (Ban et al, 2003; Owen et al, 2009)
The objective of this work was to evaluate the effect of ethephon and of abscisic acid (ABA) application timing on the color of 'Rubi' table grape
Summary
Uso do etefon e épocas de aplicação do ácido abscísico para melhorar a cor da uva de mesa 'Rubi'. Ethephon is usually applied to red‐colored Table grapes in order to improve berry color, but its ABA has been shown to be more effective than ethephon in coloring the berries of some Table grape cultivars, such as Crimson Seedless and Flame Seedless, grown at different conditions (Peppi et al, 2006; Cantín et al, 2007).
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