Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Delay of the Ripening of Wine Grapes: Effects of Specific Phytotechnical Methods on Harvest Parameters

Gizella Jahnke
* ORCID logo ,
Barna Árpád Szőke
* ,
Szabina Steckl
,
Áron Pál Szövényi
,
Gyöngyi Knolmajerné Szigeti
,
Csaba Németh
,
Botond Gyula Jenei
,
Diána Ágnes Nyitrainé Sárdy
Version 1 : Received: 13 June 2023 / Approved: 14 June 2023 / Online: 14 June 2023 (09:35:55 CEST)

A peer-reviewed article of this Preprint also exists.

Jahnke, G.; Szőke, B.Á.; Steckl, S.; Szövényi, Á.P.; Szigeti, G.K.; Németh, C.; Jenei, B.G.; Sárdy, D.Á.N. Delay in the Ripening of Wine Grapes: Effects of Specific Phytotechnical Methods on Harvest Parameters. Agronomy 2023, 13, 1963. Jahnke, G.; Szőke, B.Á.; Steckl, S.; Szövényi, Á.P.; Szigeti, G.K.; Németh, C.; Jenei, B.G.; Sárdy, D.Á.N. Delay in the Ripening of Wine Grapes: Effects of Specific Phytotechnical Methods on Harvest Parameters. Agronomy 2023, 13, 1963.

Abstract

Due to climate change, the sugar content of grapes in Hungary has increased so the high alcohol content alone can make wines disharmonious. In most vintages, this phenomenon is only a problem for early-ripening varieties. In order to prevent and treat this difficulty, we have been carrying out experiments in grape canopy management for four years with the aim of delaying ripening and thus reducing the sugar content of the grapes. The experiments were set up on an early (Pinot noir) and a late (Welshriesling) variety; two treatments (leaf re-moval - LR and short topping - ST) were applied and compared to untreated control in the years 2019-2022. Our results showed that must sugar yield was significantly reduced in all four years and for both of cultivars, while the other measured parameters (yield, acidity, pH, Botrytis infection) were not or lightly affected.

Keywords

DMR; harvest time; Vitis vinifera; climate change; gobal warming

Subject

Biology and Life Sciences, Agricultural Science and Agronomy

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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