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Vegetative, Yield, and Berry Quality Response of Aglianico to Shoot-Trimming Applied at Three Stages of Berry Ripening

Giulio Caccavello, Matteo Giaccone, Pasquale Scognamiglio, Alessandro Mataffo, Maurizio Teobaldelli, Boris Basile
Am J Enol Vitic. October 2019 70: 351-359; published ahead of print June 07, 2019 ; DOI: 10.5344/ajev.2019.18079
Giulio Caccavello
Department of Agricultural Sciences, Division of Grape and Wine Sciences, University of Naples Federico II, Viale Italia, 83100 Avellino, Italy.
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Matteo Giaccone
Department of Agricultural Sciences, Division of Grape and Wine Sciences, University of Naples Federico II, Viale Italia, 83100 Avellino, Italy.
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Pasquale Scognamiglio
Department of Agricultural Sciences, Division of Grape and Wine Sciences, University of Naples Federico II, Viale Italia, 83100 Avellino, Italy.
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Alessandro Mataffo
Department of Agricultural Sciences, Division of Grape and Wine Sciences, University of Naples Federico II, Viale Italia, 83100 Avellino, Italy.
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Maurizio Teobaldelli
Department of Agricultural Sciences, Division of Grape and Wine Sciences, University of Naples Federico II, Viale Italia, 83100 Avellino, Italy.
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Boris Basile
Department of Agricultural Sciences, Division of Grape and Wine Sciences, University of Naples Federico II, Viale Italia, 83100 Avellino, Italy.
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  • For correspondence: boris.basile@unina.it
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Abstract

The rise in air temperature due to climate change is causing an increase in the sugar accumulation rate in grape berries, resulting in increased wine alcohol concentrations. Postveraison leaf area removal (defoliation, shoot-trimming) is a suitable canopy management strategy to slow carbohydrate accumulation in the berries. However, in late-ripening cultivars, the phenological stage between veraison onset and harvest can be very long. Therefore, it can be hypothesized that the specific timing when leaf area removal is applied during the phenological stage can affect carbohydrate accumulation in the berries and berry composition. A two-year experiment was designed to compare the responses of Aglianico grapevines, a late-maturing cultivar, to shoot-trimming applied at three different stages of berry ripening. The experimental design included: (a) three trimming treatments applied at total soluble solids of 6, 12, and 18 Brix, respectively; and (b) a control treatment (untrimmed vines). Independent of the application timing, shoot-trimming decreased berry total soluble solids at harvest below that of control vines, but the later the shoot-trimming was applied, the lower berry total soluble solids was at harvest. Shoot-trimming did not affect other berry parameters. These results confirm that, at least for late-maturing cultivars, the timing of application of late shoot-trimming plays a key role in modulating the intensity of the effects of this management practice on berry composition.

  • berry composition
  • low-alcohol wine
  • summer pruning
  • Vitis vinifera
  • yield components
  • Received September 2018.
  • Revision received January 2019.
  • Revision received April 2019.
  • Accepted April 2019.
  • ©2019 by the American Society for Enology and Viticulture
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Vegetative, Yield, and Berry Quality Response of Aglianico to Shoot-Trimming Applied at Three Stages of Berry Ripening
Giulio Caccavello, Matteo Giaccone, Pasquale Scognamiglio, Alessandro Mataffo, Maurizio Teobaldelli, Boris Basile
Am J Enol Vitic.  October 2019  70: 351-359;  published ahead of print June 07, 2019 ; DOI: 10.5344/ajev.2019.18079

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Vegetative, Yield, and Berry Quality Response of Aglianico to Shoot-Trimming Applied at Three Stages of Berry Ripening
Giulio Caccavello, Matteo Giaccone, Pasquale Scognamiglio, Alessandro Mataffo, Maurizio Teobaldelli, Boris Basile
Am J Enol Vitic.  October 2019  70: 351-359;  published ahead of print June 07, 2019 ; DOI: 10.5344/ajev.2019.18079
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