Fruit zone leaf removal influences vegetative, yield, disease, fruit composition, and wine sensory attributes of Vitis vinifera L. 'Optima' and 'Cabernet franc'

1997 ◽  
Vol 77 (1) ◽  
pp. 149-153 ◽  
Author(s):  
S. L. Staff ◽  
D. C. Percival ◽  
J. A. Sullivan ◽  
K. H. Fisher
Keyword(s):  
Vitis Vinifera ◽  
Botrytis Cinerea ◽  
Canopy Structure ◽  
Sensory Attributes ◽  
Vitis Vinifera L ◽  
Leaf Removal ◽  
Cabernet Franc ◽  
Fruit Composition ◽  
Wine Composition ◽  
Bunch Rot

The influence of fruit zone leaf removal treatments (0, 50, and 100%) on grapevine canopy structure, incidence of bunch rot (Botrytis cinerea Pers.:Fr.), yield components, fruit and wine composition and wine sensory attributes was studied on Vitis vinifera L. 'Optima' and 'Cabernet franc'. The 50 and 100% leaf removal reduced leaf layer number, percent interior leaves and percent interior clusters. Yield was reduced between 29 and 46%. Severity of bunch rot in Optima and incidence and severity for Cabernet franc were reduced by leaf removal. Leaf removal improved colour, aroma and palatability of both Optima and Cabernet franc wines. Key words: Botrytis cinerea, defoliation, canopy management

The impact of grapevine red blotch disease on Vitis vinifera L. Chardonnay grape and wine composition and sensory attributes over three seasons

2019 ◽  
Vol 100 (4) ◽  
pp. 1436-1447
Author(s):  
Raul Cauduro Girardello ◽  
Vanessa Rich ◽  
Rhonda J Smith ◽  
Charles Brenneman ◽  
Hildegarde Heymann ◽  
...  
Keyword(s):  
Vitis Vinifera ◽  
Sensory Attributes ◽  
Vitis Vinifera L ◽  
Wine Composition ◽  
The Impact

scholarly journals Row Orientation and Defoliation Effects on Grape Composition of Vitis vinifera L. Agiorgitiko in Nemea (Greece)

2018 ◽  
Vol 50 ◽  
pp. 01039 ◽  
Author(s):  
Evangelia Chorti ◽  
Serafeim Theocharis ◽  
Konstantinos Boulokostas ◽  
Stamatina Kallithraka ◽  
Yorgos Kotseridis ◽  
...  
Keyword(s):  
Vitis Vinifera ◽  
Total Yield ◽  
Vitis Vinifera L ◽  
Leaf Removal ◽  
The North ◽  
Wine Composition ◽  
Wine Color ◽  
Southern Greece ◽  
East West ◽  
Factor Skin

Vineyard row orientation and canopy side exert a significant role in determining grape microclimate. The latter can be further manipulated by selective defoliation in the bunch zone. The aim of this study was to investigate the combined effects of row orientation and basal leaf removal on grape ripening of Vitis vinifera L. cv. Agiorgitiko in Nemea, Southern Greece. The experiment was conducted in 2017, on two adjacent vineyard blocks planted in 1990 on a flat site with two row orientations, North-South and East-West. Both blocks were grafted onto 41B rootstock and trained on a double cordon vertical trellis with uniform vineyard operations. Defoliation treatments included full leaf removal in the bunch zone performed at berry set and a non defoliated control, replicated three times in both blocks. Grapes were sampled at three time points from veraison to harvest from all canopy sides (i.e. E and W on North-South oriented rows and N and S on East-West oriented rows) and defoliation treatments and were analyzed for yield components and berry chemical composition. In addition, approximately 5 kg of grapes were collected from all plots and processed according to a standard winemaking protocol. Total yield and berry mass were lowest in the W-exposed and in the defoliated grapes. Must sugar and acid content, as well as wine alcohol and acidity did not depend on either factor. Skin anthocyanins and phenolics generally increased with defoliation. Skin anthocyanins and total berry phenolics were highest for north-south oriented rows, in the grapes of the cooler canopy side (E). Wines made from grapes of the E and W canopy sides showed the highest wine color, phenolic richness and the lowest pH. No interaction between row orientation and defoliation was detected for any of the measured parameters. According to the results, the E-facing grapes on the north-south oriented rows showed generally a superior grape and wine composition for Agiorgitiko variety, under the semiarid conditions of the Nemea area.

scholarly journals Fruit Zone Leaf Removal Timing and Extent Alters Bunch Rot, Primary Fruit Composition, and Crop Yield in Georgia-grown ‘Chardonnay’ (Vitis vinifera L.)

HortScience ◽  
2020 ◽  
Vol 55 (10) ◽  
pp. 1654-1661 ◽  
Author(s):  
Annie R. Vogel ◽  
Rachael S. White ◽  
Clark MacAllister ◽  
Cain C. Hickey
Keyword(s):  
Crop Yield ◽  
Fruit Set ◽  
Management Practice ◽  
Titratable Acidity ◽  
Soluble Solids ◽  
Vitis Vinifera L ◽  
Leaf Removal ◽  
Fruit Composition ◽  
Bunch Rot ◽  
The U.S

Fruit zone leaf removal is a vineyard management practice used to manage bunch rots, fruit composition, and crop yield. We were interested in evaluating fruit zone leaf removal effects on bunch rot, fruit composition, and crop yield in ‘Chardonnay’ grown in the U.S. state of Georgia. The experiment consisted of seven treatments: no leaf removal (NO); prebloom removal of four or six leaves (PB-4, PB-6), post–fruit set removal of four or six leaves (PFS-4, PFS-6), and prebloom removal of two or three leaves followed by post–fruit set removal of two or three leaves (PB-2/PFS-2, PB-3/PFS-3). Although leaf removal reduced botrytis bunch rot and sour rot compared with NO, effects were inconsistent across the two seasons. Fruit zone leaf removal treatments reduced titratable acidity (TA) and increased soluble solids compared with NO. PB-6 consistently reduced berry number per cluster, cluster weight, and thus crop yield relative to PFS-4. Our results show that post–fruit set fruit zone leaf removal to zero leaf layers aids in rot management, reduces TA, increases soluble solids, and maintains crop yield compared with no leaf removal. We therefore recommend post–fruit set leaf removal to zero leaf layers over no leaf removal if crops characterized by relatively greater soluble solids-to-TA ratio and reduced bunch rot are desirable for winemaking goals.

Optimizing deficit irrigation strategies to manage vine performance and fruit composition of field-grown ‘Sangiovese’ (Vitis vinifera L.) grapevines

2014 ◽  
Vol 179 ◽  
pp. 239-247 ◽  
Author(s):  
Vania Lanari ◽  
Alberto Palliotti ◽  
Paolo Sabbatini ◽  
G. Stanley Howell ◽  
Oriana Silvestroni
Keyword(s):  
Vitis Vinifera ◽  
Deficit Irrigation ◽  
Vitis Vinifera L ◽  
Fruit Composition

scholarly journals Leaf-to-Fruit Ratios in Vitis vinifera L. cv. “Sauvignon Blanc”, “Carmenère”, “Cabernet Sauvignon”, and “Syrah” Growing in Maule Valley (Chile): Influence on Yield and Fruit Composition

Agriculture ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 176
Author(s):  
Gastón Gutiérrez-Gamboa ◽  
Irina Díaz-Galvéz ◽  
Nicolás Verdugo-Vásquez ◽  
Yerko Moreno-Simunovic
Keyword(s):  
Vitis Vinifera ◽  
Yield Components ◽  
Soluble Solids ◽  
Vitis Vinifera L ◽  
Cabernet Sauvignon ◽  
Clear Trend ◽  
Total Polyphenol ◽  
Sauvignon Blanc ◽  
Fruit Composition ◽  
Berry Composition

A trial was conducted during the 2005–2006 season in order to determine the effects of different leaf-to-fruit ratios on yield components and fruit composition in four Vitis vinifera L. cultivars. The treatments consisted of selecting shoots of four lengths (>1.3 m, 1.3–0.8 m, 0.8–0.4 m, and <0.4 m) with two crop levels (1–2 clusters/shoot), which allowed defining eight ratios. Berry composition and yield components were measured. The treatments affected the accumulation of soluble solids in “Sauvignon blanc”, “Cabernet Sauvignon”, and “Syrah”, delaying it as the ratio decreased. All yield components were affected in “Sauvignon blanc”, while bunch weight and the number of berries per bunch were altered without a clear trend. None of the yield components were affected in “Cabernet Sauvignon”, while the lowest ratio presented the lowest number of berries per bunch in “Syrah”. Total polyphenol index (TPI) was affected in “Carmenère” without a clear trend. A highly significant correlation was found between shoot length and leaf area in all studied cultivars. As the ratio increased, the shoot lignification increased in “Sauvignon blanc”. However, studies must be conducted during more seasons to establish better conclusions about the effects of leaf-to-fruit ratios on yield and fruit composition.

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