What management strategies are most effective in minimising sunburn damage in Chardonnay vineyards around Orange

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Abstract

Sunburn damage manifests as a browning of the berry skin, and depending on the severity of the damage can lead to cracking and shrivelling of the grapes which reduces the visual and aromatic quality of the grapes causing economic losses to grape and wine producers as a result losses in yield and wine quality. In areas where leaf removal is a common practice, better understanding of the best moment to conduct this practice could help mitigate this problem. During the 2018-19 season the effect of leaf removal timing on sunburn incidence and on the accumulation of photoprotective compounds was evaluated on Chardonnay grapes from 2 vineyards located at different altitudes in the Orange region. Leaf removal led to higher final concentrations of all photoprotective compounds when compared to the non-defoliated control. Marked differences were observed in the accumulation patterns between berries defoliated early (end of flowering) and those defoliated later (véraison), with earlier accumulation, and thus better acclimation in those that were exposed early. Ultimately, sunburn damage was higher in grapes defoliated at véraison. There were no significant differences between yield, total soluble sugars, pH, titratable acidity and YAN between treatments within each vineyard.
Original languageEnglish
Place of PublicationWagga Wagga, NSW
PublisherWine Australia
Commissioning bodyAustralian Grape and Wine Authority trading as Wine Australia
Number of pages20
Publication statusPublished - 2019

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sunburn
vineyards
grapes
small fruits
wine quality
cracking
titratable acidity
aromatic compounds
wines
leaves
acclimation
leaf area
flowering
sugars
incidence
economics

Cite this

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title = "What management strategies are most effective in minimising sunburn damage in Chardonnay vineyards around Orange",
abstract = "Sunburn damage manifests as a browning of the berry skin, and depending on the severity of the damage can lead to cracking and shrivelling of the grapes which reduces the visual and aromatic quality of the grapes causing economic losses to grape and wine producers as a result losses in yield and wine quality. In areas where leaf removal is a common practice, better understanding of the best moment to conduct this practice could help mitigate this problem. During the 2018-19 season the effect of leaf removal timing on sunburn incidence and on the accumulation of photoprotective compounds was evaluated on Chardonnay grapes from 2 vineyards located at different altitudes in the Orange region. Leaf removal led to higher final concentrations of all photoprotective compounds when compared to the non-defoliated control. Marked differences were observed in the accumulation patterns between berries defoliated early (end of flowering) and those defoliated later (v{\'e}raison), with earlier accumulation, and thus better acclimation in those that were exposed early. Ultimately, sunburn damage was higher in grapes defoliated at v{\'e}raison. There were no significant differences between yield, total soluble sugars, pH, titratable acidity and YAN between treatments within each vineyard.",
keywords = "sunburn, chardonnay, management strategies",
author = "Joanna Gambetta and Bruno Holzapfel and Leigh Schmidtke",
year = "2019",
language = "English",
publisher = "Wine Australia",

}

TY - BOOK

T1 - What management strategies are most effective in minimising sunburn damage in Chardonnay vineyards around Orange

AU - Gambetta, Joanna

AU - Holzapfel, Bruno

AU - Schmidtke, Leigh

PY - 2019

Y1 - 2019

N2 - Sunburn damage manifests as a browning of the berry skin, and depending on the severity of the damage can lead to cracking and shrivelling of the grapes which reduces the visual and aromatic quality of the grapes causing economic losses to grape and wine producers as a result losses in yield and wine quality. In areas where leaf removal is a common practice, better understanding of the best moment to conduct this practice could help mitigate this problem. During the 2018-19 season the effect of leaf removal timing on sunburn incidence and on the accumulation of photoprotective compounds was evaluated on Chardonnay grapes from 2 vineyards located at different altitudes in the Orange region. Leaf removal led to higher final concentrations of all photoprotective compounds when compared to the non-defoliated control. Marked differences were observed in the accumulation patterns between berries defoliated early (end of flowering) and those defoliated later (véraison), with earlier accumulation, and thus better acclimation in those that were exposed early. Ultimately, sunburn damage was higher in grapes defoliated at véraison. There were no significant differences between yield, total soluble sugars, pH, titratable acidity and YAN between treatments within each vineyard.

AB - Sunburn damage manifests as a browning of the berry skin, and depending on the severity of the damage can lead to cracking and shrivelling of the grapes which reduces the visual and aromatic quality of the grapes causing economic losses to grape and wine producers as a result losses in yield and wine quality. In areas where leaf removal is a common practice, better understanding of the best moment to conduct this practice could help mitigate this problem. During the 2018-19 season the effect of leaf removal timing on sunburn incidence and on the accumulation of photoprotective compounds was evaluated on Chardonnay grapes from 2 vineyards located at different altitudes in the Orange region. Leaf removal led to higher final concentrations of all photoprotective compounds when compared to the non-defoliated control. Marked differences were observed in the accumulation patterns between berries defoliated early (end of flowering) and those defoliated later (véraison), with earlier accumulation, and thus better acclimation in those that were exposed early. Ultimately, sunburn damage was higher in grapes defoliated at véraison. There were no significant differences between yield, total soluble sugars, pH, titratable acidity and YAN between treatments within each vineyard.

KW - sunburn

KW - chardonnay

KW - management strategies

M3 - Commissioned report

BT - What management strategies are most effective in minimising sunburn damage in Chardonnay vineyards around Orange

PB - Wine Australia

CY - Wagga Wagga, NSW

ER -