scholarly journals Agronomical and Chemical Effects of the Timing of Cluster Thinning on Pinot Noir (Clone 115) Grapes and Wines

Fermentation ◽  
2018 ◽  
Vol 4 (3) ◽  
pp. 60 ◽  
Author(s):  
Paul Mawdsley ◽  
Jean Dodson Peterson ◽  
L. Casassa
Keyword(s):  
Growing Season ◽  
Pinot Noir ◽  
Central Coast ◽  
Phenolic Profile ◽  
Time Points ◽  
Consistent Effect ◽  
Chemical Effects ◽  
Fruit Composition ◽  
Cluster Thinning ◽  
Sensory Difference

A two-year study was performed to evaluate the effects of the timing of cluster thinning on Pinot noir grapes and wines in the central coast of California. Vines were thinned to one cluster per shoot at three selected time-points during the growing season, and fruit was harvested and made into wine. No consistent effect of cluster thinning was found in wine phenolic profile or color across a cool (2016) and a warm (2017) growing season. The growing season had a more significant effect than the cluster thinning treatment for most parameters measured. There was no detectable overall sensory difference between the non-thinned control wines and any of the thinned treatment wines. Based on current results, Pinot noir vineyards on the central coast of California can support crop loads that result in Ravaz Index values from 3 to 6 without concern for impacting ripening potential or negatively affecting fruit composition.

scholarly journals A Five-year Study on the Effect of Cluster Thinning on Yield and Fruit Composition of `Chambourcin' Grapevines

HortScience ◽  
2006 ◽  
Vol 41 (3) ◽  
pp. 586-588 ◽  
Author(s):  
Imed Dami ◽  
Dave Ferree ◽  
Anton Prajitna ◽  
Dave Scurlock
Keyword(s):  
Growing Season ◽  
Climatic Conditions ◽  
Commercial Production ◽  
Soluble Solids ◽  
Crop Load ◽  
Fruit Composition ◽  
Cluster Thinning ◽  
Hybrid Cultivar ◽  
Short Growing Season ◽  
Cool Climate

`Chambourcin' (Vitis sp.) is a French-American hybrid cultivar that has the propensity to overcrop, and its performance under cool climate and short growing season is not known. This study was conducted for five years (2000 to 2004) to evaluate the effect of three levels of cluster thinning (10, 20, and 30 clusters per vine) on yield and fruit composition of `Chambourcin' grown in northeastern Ohio. Cluster thinning reduced yield per vine and crop load, but increased pruning, cluster and berry weights. Cluster thinning also improved juice composition by increasing soluble solids and pH but not acidity. It was concluded that under the climatic conditions of this study, thinning to 10 clusters per vine (or 8 clusters per meter of row) produced the lowest yield but the highest vine size with the most optimum fruit composition. Therefore, vines from the 10-cluster treatment were considered the most balanced in the 5-year study. Additionally, due to the repeated coincidence of harvest with the first fall frost, it was suggested that the site in continental Northeast Ohio is risky for commercial production and longer and warmer seasons are thus preferred.

scholarly journals Effect of cluster thinning on fruit composition of Vitis vinifera cv. Pinot noir (Vitis vinifera L.)

2011 ◽  
Vol 12 (3) ◽  
pp. 477-485 ◽  
Author(s):  
Marko KAROGLAN ◽  
Bernard KOZINA ◽  
Luna MASLOV ◽  
Mirela OSREČAK ◽  
Tamara DOMINKO ◽  
...  
Keyword(s):  
Vitis Vinifera ◽  
Pinot Noir ◽  
Vitis Vinifera L ◽  
Fruit Composition ◽  
Cluster Thinning

scholarly journals Climate resilience in the United Kingdom wine production sector: CREWS-UK

2019 ◽  
Vol 15 ◽  
pp. 01011
Author(s):  
A. Nesbitt ◽  
S. Dorling ◽  
R. Jones
Keyword(s):  
Climate Change ◽  
Growing Season ◽  
Pinot Noir ◽  
Future Climate Change ◽  
Climate Trends ◽  
Wine Production ◽  
Production Sector ◽  
Climate Resilience ◽  
South Central ◽  
Grape Quality

As cool climate viticulture rapidly expands, the England and Wales wine sector is winning international acclaim, particularly for its sparkling wines, and is attracting significant investment. Supported by warming climate trends during the growing season, wine producers are establishing new vineyards planted predominantly with Pinot Noir and Chardonnay. Grape-friendly weather conditions in 2018 led to a record harvest and may be a sign of good things to come. Long term (100-years) Growing Season Average Temperatures (GSTs) in south-east and south-central England have noticeably increased with 6 of the top 10 warmest growing seasons (April–October), over the last 100 years, occurring since 2005. However, weather and growing season conditions fluctuate markedly from year to year, meaning that yields and grape quality continue to vary significantly. Weather extremes are anticipated to become more frequent under future climate change, further threatening the stability of production. Current uncertainty over future climatic conditions during the growing season and their potential effects on viticulture in the UK exposes both existing producers and potential investors to unquantified risks and opportunities. The CREWS-UK climate resilience research project is generating actionable information on how climate change may affect the wine production sector, to support better decision-making and investment.

scholarly journals Spatial variability in climate, phenology, and fruit composition across a reference vineyard network in Southern Oregon

2018 ◽  
Vol 50 ◽  
pp. 01018
Author(s):  
Gregory V. Jones
Keyword(s):  
Spatial Variability ◽  
Observational Data ◽  
Growing Season ◽  
Spatial Variations ◽  
Total Acidity ◽  
Diurnal Temperature ◽  
Fruit Composition ◽  
Western Us ◽  
Harvest Dates ◽  
Temperature Ranges

This paper provides a summary of observational data from a reference vineyard network in the Southern Oregon American Viticultural Area (AVA). The network was established to collect baseline data on spatial variations in temperature, grapevine phenology, and composition characteristics across a collection of varieties grown in the region. The results from the period 2003 through 2017 show a wide diversity of climate types for winegrape production ranging from relatively cool to relatively warm conditions (GST 14.8 to 17.5°C and GDD 1109 to 1657). One unique climate aspect is that the region experiences higher diurnal temperature ranges during the growing season than regions in Europe and many others in the western US. Grapevine phenological timing and intervals between events are similar to other wine regions with budbreak averaging 14-Apr, flowering 14-Jun, véraison 19-Aug. However, harvest dates are up to ten days to two weeks later than many regions in Europe. Ripening period and harvest composition observations reveal the diversity of potential varieties that the region can ripen. Over all varieties, sites and vintages observed harvest composition averages 23.7 °Brix, 6.4 g/L total acidity, a pH of 3.44, and yields of 2.7 tons/acre.

scholarly journals Crop Load Adjustment in ‘Seyval Blanc’ Winegrape: Impacts on Yield Components, Fruit Composition, Consumer Wine Preferences, and Economics of Production

2011 ◽  
Vol 21 (5) ◽  
pp. 593-598 ◽  
Author(s):  
Tyler G. Berkey ◽  
Anna Katharine Mansfield ◽  
Steven D. Lerch ◽  
James M. Meyers ◽  
Justine E. Vanden Heuvel
Keyword(s):  
Yield Components ◽  
Consumer Preference ◽  
Soluble Solids ◽  
Load Management ◽  
Labor Costs ◽  
Sensory Panel ◽  
Crop Load ◽  
Fruit Composition ◽  
Cluster Thinning ◽  
Second Year

Crop load management treatments were applied to ‘Seyval Blanc’ grapevines (Vitis hybrid) as a 2 × 2 factorial design: no shoot thinning (ST)/no cluster thinning (CL) (i.e., control), ST combined with CL (ST + CL), ST only, and CL only. All treatments reduced yield and crop load (yield/pruning weight) in 2009 and had a smaller impact in 2010 due to the carryover effect of previous year treatments on crop potential. Soluble solids were improved by up to 3.2% by the ST + CL treatment in 2009, but were not impacted by treatments in the second year when the range of yield was smaller and the ripening conditions more favorable. Rank sum analysis for the 2009 vintage indicated that wines produced from the CL treatment were preferred by the sensory panel compared with the control wine, but there were no differences in consumer preference for wines produced in the 2010 season. Grower preferred price in 2009 (required to compensate the grower for labor costs and lost yield) increased from $556/t in the control to $824/t in the CL treatment, an increase which could be justified by the demonstrated consumer preference for the CL wine. Grower preferred price was $1022/t in the ST + CL treatment in 2009, a price increase that was not justified by a demonstrated consumer preference for the wine. In 2010, grower preferred price ranged from $541/t for the control to $610/t for the ST + CL treatment, an unjustified increase based on the lack of demonstrated consumer preference for the wines.

scholarly journals Changes in the concentration of phenolic compounds of ‘Pinot Noir’ grapes and base wines prepared from it

2020 ◽  
pp. 260-265
Author(s):  
Владимир Арамович Маркосов ◽  
Наталья Михайловна Агеева ◽  
Олег Васильевич Ничвидюк ◽  
Армен Юрьевич Даниелян ◽  
Виктор Викторович Тургенев ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Weather Conditions ◽  
Growing Season ◽  
Considerable Change ◽  
Pinot Noir ◽  
Cabernet Sauvignon ◽  
Temperature And Precipitation ◽  
The Difference ◽  
Coloring Agents ◽  
Grape Varieties

Исследован технологический запас фенольных веществ винограда сорта Пино нуар в зависимости от погодных условий вегетационного периода 2017-2019 годов в сравнении с сортом Каберне-Совиньон. Показано, что кроме массовой концентрации сахаров и титруемых кислот установление технологического запаса фенольных соединений должно быть важнейшим критерием для определения срока сбора красных сортов винограда. Установлено существенное влияние погодных условий (температура и количество осадков) на технологический запас фенольных соединений, в том числе красящих веществ. Представлены экспериментальные данные о существенном изменении количества красящих веществ в обоих сортах винограда в зависимости от метеорологических факторов в период вегетации. Показано различие в динамике созревания и накопления фенольных соединений сортами Пино нуар и Каберне-Совиньон. Установлены особенности изменения концентрации суммы фенольных соединений и красящих веществ в виноматериалах в процессе их хранения в зависимости от сорта винограда и их исходных концентраций: большая сохранность фенольных соединений выявлена в виноматериалах Пино нуар, особенно произведенных в 2019 г. Неодинаковые сроки созревания винограда и накопления технологического запаса красящих веществ в сезон виноделия урожаев 2017-2019 гг. зависят, по нашему мнению, не только от суммы активных температур и осадков вегетационного периода, но и от напряжения температуры во время интенсивного созревания винограда (июля, августа месяца 2019 г.). The technological stock of phenolic substances of ‘Pinot Noir’ grapes in comparison with ‘Cabernet-Sauvignon’ variety was investigated depending on the weather conditions of the growing season of 2017-2019. It is shown that in addition to the mass concentration of sugars and titratable acids, the establishment of a technological reserve of phenolic compounds should be the most important criterion for determining the timing of red grapes harvest. A significant impact of weather conditions (temperature and precipitation) on the technological supply of phenolic compounds, including coloring agents, is established. Experimental data on a considerable change in the quantity of coloring agents in both grape varieties depending on meteorological factors during the growing season are presented. The difference in the dynamics of ripening and accumulation of phenolic compounds by ‘Pinot Noir’ and ‘Cabernet-Sauvignon’ varieties is shown. There is a feature to change the concentration of the quantity of phenolic compounds and coloring agents in base wines in the process of storage depending on grape variety and their initial concentrations: great preservation of phenolic compounds is revealed in ‘Pinot Noir’ base wine, especially those produced in 2019. Different timing of grape ripening and accumulation of technological reserve of coloring agents during the season of 2017-2019 winemaking harvest depends, in our opinion, not only from the total amount of active temperatures and precipitation of the growing season, but also from the voltage of temperature during the intense ripening of grapes (July, August of 2019).

scholarly journals Evaluation of Winegrapes in British Columbia: `Chardonnay' and `Pinot noir' Clones

2004 ◽  
Vol 14 (4) ◽  
pp. 594-602 ◽  
Author(s):  
Andrew G. Reynolds ◽  
Margaret Cliff ◽  
Douglas A. Wardle ◽  
Marjorie King
Keyword(s):  
British Columbia ◽  
Vitis Vinifera ◽  
Pinot Noir ◽  
Fruit Maturation ◽  
Industry Growth ◽  
Heat Units ◽  
Fruit Composition ◽  
Block Experiment

Eighty-five cultivars, selections and clones from European winegrape (Vitis spp.) breeding and selection programs were evaluated between 1993 and 1995 in a randomized complete-block experiment. These included Vitis vinifera clones from France as well as Freiburg, Geisenheim, and Weinsberg, Germany. Small yield and fruit composition differences were found amongst the 'Chardonnay' clones. The standard Prosser clone produced wines with highest earthy aroma and acidity and with lowest perfumy aroma, body and finish; Dijon clones 76 and 96 were most perfumy and least vegetal. `Pinot noir' clones also differed somewhat in terms of yield and fruit composition; `Samtröt', `Gamay Beaujolais', and clone Q1342-01 were amongst the most highly colored clones. These clones also tended to have the most intense berry and currant aromas as well as berry, cherry, and currant flavors. These aforementioned clones appear to be highly adaptable to viticultural regions where low heat units during fruit maturation presently limit industry growth.

scholarly journals Grapevine culture in trenches. 2. Reproductive characteristics and interactions with vegetative growth

OENO One ◽  
2003 ◽  
Vol 37 (2) ◽  
pp. 85
Author(s):  
Christophe Zapata ◽  
Jean-Claude Audran ◽  
Christian Magné
Keyword(s):  
Biomass Production ◽  
Vegetative Growth ◽  
Fruit Set ◽  
Reproductive Development ◽  
Growing Season ◽  
Pinot Noir ◽  
Inflorescence Development ◽  
The Third ◽  
Controlled Conditions ◽  
Berry Size

<p style="text-align: justify;">In order to assess the consequence of a strong vegetative growth on inflorescence development and berry setting, two grapevine cultivars differing in their rate of fruit set were grown for 3 years in a greenhouse under semi-controlled conditions. Merlot (low % fruit set) and Pinot noir (high % fruit set) vines produced well-developed clusters in year 3 after planting, thus allowing the study of interactions between vegetative growth and reproductive development over the third growing season. Progress in development of both cultivars was simultaneous until pea berry size and biomass production was similar throughout the season. However, biomass production was negatively correlated to flower differentiation (number of flowers/inflorescence) in Merlot whereas not in P. noir. Possible causes of this interaction are discussed.</p>

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