Maturity responses of Sultanina grapes to gibberellic acid treatments
DOI:
https://doi.org/10.5073/vitis.1973.12.33-37Abstract
Sultanina vines were sprayed once or twice after berry set and twice - one spray at bloom and one after set, with 20 ppm GA3 • There was a retarding effect on ripening of the double late sprays in comparison with the other treatments and with the non-sprayed vines; it was expressed in the lower sugar content and the higher acid content of the grapes.
Der Einfluß von Gibberellinsäure-Behandlungen auf die Reife von Sultanina-Reben
Sultanina-Reben wurden ein- oder zweimal nach dem Beerenansatz sowie zweimal - in der Blüte und nach dem Ansatz - mit 20 ppm GA3 besprüht. Die zweifache späte Behandlung bewirkte eine Verzögerung der Beerenreife, verglichen mit den ande,·en Behandlungen und der Kontrolle; diese Reifeverzögerung äußerte sich in einem geringeren Zucker- und einem höheren Säuregehalt.
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