Effect of Y-trellis and vertical shoot positioning training systems on downy mildew and botrytis bunch rot of grape in highlands of southern Brazil

ABSTRACT: Prohexadione-calcium (ProCa) is a gibberellin biosynthesis inhibitor and the objective of this study was to evaluate the effect of ProCa on the downy mildew (DM) and Botrytis bunch rot (BBR) epidemiology, and the yield and technological and phenolic parameters of grape Merlot cultivar. Experiments were carried out in a commercial vineyard in São Joaquim Municipality/SC, Southern Brazil, during the 2017-2018 and 2018-2019 growing seasons. ProCa was applied at four doses and three phenological stages: A) 0 g ha−1 (control); B) 1000 g ha−1 (inflorescence fully developed); C) 500 + 500 g ha−1 (inflorescence fully developeted and full flowering); D) 500 + 500 + 500 g ha−1 (inflorescence fully developed, full flowering, and berries pea-sized). DM and BBR incidence and severity were quantified weekly from the first symptom appearance until harvest, and their epidemiology was compared according to: a) the beginning of symptom appearance; b) the time to reach the maximum disease incidence and severity; c) the maximum value of disease incidence and severity; d) the area under the disease progress curve. In general, there were significant differences in the ProCa doses for all epidemiologic parameters of DM and BBR compared with the control plot; however, there was no significant difference among the ProCa doses. The principal epidemiological variables that differentiated the effect of ProCa on the DM and BBR control were the Smax and AUSDPC. Some yield and technological and phenolic parameters were negatively affected by different doses of ProCa, but it was still a good option for DM and BBR control in highland region of southern Brazil during the 2017-2018 and 2018-2019 growing seasons.

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Physicochemical and aromatic composition of 'Sauvignon Blanc' wines obtained from the Y-trellis and VSP training systems

Pesquisa Agropecuária Brasileira ◽

10.1590/s1678-3921.pab2021.v56.02255 ◽

2021 ◽

Vol 56 ◽

Author(s):

José Luiz Marcon Filho ◽

Douglas André Wurz ◽

Alberto Fontanella Brighenti ◽

Aike Anneliese Kretzschmar ◽

Leo Rufato ◽

...

Keyword(s):

High Altitude ◽

Capric Acid ◽

Isoamyl Acetate ◽

Training System ◽

Phenolic Composition ◽

Southern Brazil ◽

Sauvignon Blanc ◽

Physicochemical Composition ◽

Training Systems ◽

Commercial Vineyard

Abstract: The objective of this work was to compare the effect of the Y-trellis and vertical shoot position trellis (VSP) training systems on the physicochemical composition and aromatic profile of 'Sauvignon Blanc' (Vitis vinifera) wines in a high-altitude region of the state of Santa Catarina, Southern Brazil. The experiment was conducted during the 2015 vintage in a commercial vineyard located in the municipality of São Joaquim. The treatments consisted of the training systems: Y-trellis and VSP pruned in spur cordon. Sixty kilograms of grapes were harvested from each training system to make the wines, which were evaluated as to their chemical and phenolic composition and aromatic profile. There is no effect of the training system on the wine chemical variables pH, total acidity, color, and total polyphenols. The aromatic profile and phenolic composition of the wines are affected by the training systems, being related to the variables ethyl acetate, isoamyl acetate, 3-methyl-1-butanol, propanoic acid, and gallic acid in the Y-trellis, and to 1-hexanol, isovaleric acid, caprylic acid, capric acid, and catechin in VSP. The Y-trellis system can be an alternative for high-altitude regions of Southern Brazil.

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Quantitative trait locus mapping of downy mildew and botrytis bunch rot resistance in a Vitis aestivalis-derived ‘Norton’-based population

Acta Horticulturae ◽

10.17660/actahortic.2019.1248.44 ◽

2019 ◽

pp. 305-312 ◽

Cited By ~ 2

Author(s):

S.D. Sapkota ◽

L.L. Chen ◽

S. Yang ◽

K.E. Hyma ◽

L.E. Cadle-Davidson ◽

...

Keyword(s):

Quantitative Trait Locus ◽

Downy Mildew ◽

Quantitative Trait Locus Mapping ◽

Quantitative Trait ◽

Vitis Aestivalis ◽

Trait Locus ◽

Bunch Rot ◽

Locus Mapping

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The effect of different training systems on vegetative and productive performance of ‘Maxigala’ apple tree in southern Brazil

Acta Horticulturae ◽

10.17660/actahortic.2018.1228.20 ◽

2018 ◽

pp. 135-140

Author(s):

A.A. Kretzschmar ◽

G.F. Sander ◽

R.D. Arruda ◽

A.P.F. Lima ◽

T.A. Macedo ◽

...

Keyword(s):

Apple Tree ◽

Productive Performance ◽

Southern Brazil ◽

Training Systems

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Gibberellin Application Improved Bunch Rot Control of Vignoles Grape, but Response to Mechanical Defoliation Varied between Training Systems

Plant Disease ◽

10.1094/pdis-06-20-1184-re ◽

2020 ◽

pp. PDIS-06-20-1184

Author(s):

Bryan Hed ◽

Michela Centinari

Keyword(s):

Soluble Sugar ◽

Control Program ◽

Titratable Acidity ◽

Training System ◽

Cluster Architecture ◽

Training Systems ◽

Positive Effects ◽

Treatment Responses ◽

Cluster Compactness ◽

Bunch Rot

Late-season bunch rot causes significant crop loss for grape growers in wet and humid climates. For 3 years (2016 to 2018), we integrated prebloom mechanized defoliation (MD) in the fruit zone and bloom gibberellin (GA) applications, either alone or in combination, into the bunch rot control program of Vignoles, a commercially valuable grape variety that is highly susceptible to bunch rot. We hypothesized that both treatments would decrease bunch rot through modification of cluster architecture or fruit zone microclimate compared with vines treated with the standard chemical control program. Grapevines were trained to two popular training systems, four-arm Kniffin (4AK) and high-wire bilateral cordon (HWC). Treatment responses varied between training systems. MD, alone or in combination with GA, reduced bunch rot incidence and severity every year on 4AK-trained vines, an effect attributed mainly to fruit zone improvements. Conversely, MD alone did not reduce bunch rot incidence on HWC-trained vines, despite significant improvements in cluster architecture (reduced number of berries per cluster and cluster compactness). GA applications were more effective than MD at reducing cluster compactness, regardless of training system. As a result, GA reduced bunch rot incidence and severity when applied alone or with MD on 4AK- and HWC-trained vines. All treatments positively improved fruit-soluble sugar concentration on both training systems, while positive effects on titratable acidity were more consistent across training systems with MD.

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Response of `Chardonnay' Grapevines to Training and Crop Control

HortScience ◽

10.21273/hortsci.30.4.800g ◽

1995 ◽

Vol 30 (4) ◽

pp. 800G-801

Author(s):

Thomas J. Zabadal ◽

Gary R. VanEe ◽

Thomas W. Dittmer ◽

Richard L. Ledebuhr

Keyword(s):

Fruit Quality ◽

Soluble Solids ◽

Training Systems ◽

Intermediate Response ◽

Cluster Compactness ◽

Bunch Rot ◽

Growing Conditions

Growing conditions in Michigan can threaten the yield and acceptable fruit quality of `Chardonnay' grapevines. Three grapevine training systems, mid-wire cordon (MWC), umbrella kniffin (UK), and a combination of the two (MWC-UK) were evaluated under Michigan growing conditions to determine their influence on yield, fruit quality, cluster compactness, incidence and severity of Botrytis bunch rot, and trellis fill. Vines were grown on C3309 rootstock and pruned to 44 nodes per kilogram of cane prunings. The MWC-UK treatment had an additional 30 nodes per vine retained, and the crop level on these nodes was removed after fruitset. Over a 2-year period, UK and MWC-UK trained vines had fruit soluble solids about 1 °Brix higher and yields were 48% and 63% higher than MWC trained vines, respectively. MWC-UK trained vines consistently out-performed MWC trained vines for all variables measured, while UK-trained vines provided an intermediate response.

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Performance of 'Seyval Blanc' Grape in Four Training Systems Over Five Years

HortScience ◽

10.21273/hortsci.37.7.1023 ◽

2002 ◽

Vol 37 (7) ◽

pp. 1023-1027 ◽

Cited By ~ 2

Author(s):

D. Ferree ◽

T. Steiner ◽

J. Gallander ◽

D. Scurlock ◽

G. Johns ◽

...

Keyword(s):

Chemical Constituents ◽

Canopy Gaps ◽

Training System ◽

Soluble Solids ◽

Average Weight ◽

Training Systems ◽

Bunch Rot ◽

System Average

Own-rooted 'Seyval Blanc' vines were evaluated over 5 years in the following training systems: bilateral cordon, bilateral cordon sylvos (sylvos), upright cordon-spur pruned, and upright cordon-cane pruned. Vines in all systems were spaced 1.8 x 2.7 m and were shoot thinned to 40 shoots and cluster thinned to one cluster per shoot. Cumulative yields over 5 years of the upright cordon systems were higher than vines in the sylvos system. Average weight of cane prunings was higher in the upright cordon vines than in all other systems. Vines trained to the sylvos system had more canopy gaps, less Botrytis bunch rot, and higher juice soluble solids than other systems in some years. The chemical constituents of the must and wine or evaluation by tasting showed little influence of training system.

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