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Title:Facilitating green care improvements in viticulture
Authors:ID Sternad Lemut, Melita, Univerza v Novi Gorici (Author)
ID Butinar, Lorena, Univerza v Novi Gorici (Author)
ID Rowland, Adesida, Univerza v Novi Gorici (Author)
ID Česnik, Urban, Univerza v Novi Gorici (Author)
ID Jug, Tjaša, Kmetijsko gozdarski zavod Nova Gorica (Author)
ID Sivilotti, Paolo, Univerza v Vidmu (Author)
ID Vrhovšek, Urška, Research and Innovation Centre, Edmund Mach Foundation, Food Quality and Nutrition Department (Author)
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Work type:Not categorized
Typology:1.08 - Published Scientific Conference Contribution
Organization:UNG - University of Nova Gorica
Abstract:The growing demand of consumers for environment-friendly and safe food products already forced many winemakers to restrict the application of synthetic fungicides to earlier season, trying to reduce the risk of residues being detected in wines. Main risk for infection by B. cinerea, however, occurs later in the season. To support an improvement in whole-season B. cinerea green care, the potential of yeasts as biocontrol agent (PBA) was studied. Selected yeasts were tested for their antifungal activities. Furthermore, a field experiment in Pinot noir and Pinot gris vineyards was designed to study different combinations of optimized canopy microclimate manipulation (CMM) techniques and PBA application. In experimental conditions, PBA's ability to maintain appropriate population density for disease prevention was observed. Grape and wine quality parameters were evaluated. Analytical approach of metabolomics was applied to upgrade the understanding of potentially induced changes in plant metabolism. Based on yeasts testing results, biocontrol yeast P. guilliermondii ZIM 624 was selected and after its field application, we were able to detect its suitable density on grapes until harvest. In case of early defoliation for both varieties smaller grape compactness was confirmed together with lower yield. Among grape basic quality parameters, optimized techniques showed positive effect on sugar content, but unexpectedly, in the treatments with biocontrol yeasts the trends toward higher acidity were noticed in Pinot gris. CMM and PBA introduction indicated some effects on grapevine biosynthetic behaviour but the differences in content of these metabolites compared to control were poorly detected in final wines with exception of mainly some flavonols, stilbenes and flavan-3-ols (and consequently total phenolic content).
Keywords:sustainable viticulture, Botrytis cinerea, yeasts, biocontrol, canopy microclimate manipulation, metabolomics, grapevine metabolites
Publication status:Published
Year of publishing:2019
Number of pages:1-12
PID:20.500.12556/RUNG-5057-e38ea2dc-8b87-ba6d-2110-7d024b49bc92 New window
COBISS.SI-ID:5577211 New window
Publication date in RUNG:28.02.2020
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Record is a part of a monograph

Title:Book of proceedings, Sixth International Scientific Conference June 5th-World Environment Day, 18-19 June, 2018, Bihać, Bosnia and Herzegovina
Editors:Husein VILIĆ
Place of publishing:Bihać
Publisher:University of Bihać, Biotechnical Faculty
Year of publishing:2019
Conference organizer:Bihać: University of Bihać, Biotechnical Faculty