Journal article
Postveraison leaf removal does not consistently delay ripening in semillon and shiraz in a hot australian climate
R De Bei, X Wang, L Papagiannis, M Cocco, P O’Brien, M Zito, J Ouyang, S Fuentes, M Gilliham, S Tyerman, C Collins
American Journal of Enology and Viticulture | AMER SOC ENOLOGY VITICULTURE | Published : 2019
Abstract
Grapegrowing areas worldwide are experiencing earlier and compressed phenology because of higher temperatures, which has led to excessive sugar accumulation in grapes. This is associated with negative effects on grape and wine quality and higher alcohol in wines. Recent research has shown that early, climate-related ripening can be ameliorated by late leaf removal above the cluster zone. This practice was found to delay sugar accumulation in the berries by up to two weeks without affecting other berry chemistry parameters. Therefore, in this study, postveraison leaf removal was investigated as a canopy management technique to delay ripening in Semillon and Shiraz in a hot climate in Australi..
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Funding Acknowledgements
This research was supported by funding from Wine Australia. Wine Australia invests in and manages research, development, and extension on behalf of Australia's grapegrowers and winemakers and the Australian Government. Thanks to all of the Viticulture laboratory staff and interns at the University of Adelaide who assisted in data collection and making an enjoyable workplace. The authors also acknowledge all the sensory assessors who participated in the study. A special thank you goes to the Coombe vineyard staff, in particular Mr. Phil Earl and Mr. Ben Pike, for their support with the trial.