IVAS 2022 banner
IVES 9 IVES Conference Series 9 IVAS 9 IVAS 2022 9 Viticultural and enological strategies for the prevention of Botrytis cinerea- induced quality losses

Viticultural and enological strategies for the prevention of Botrytis cinerea- induced quality losses

Abstract

Infection of the grapes with Botrytis cinerea has a tremendous impact on the resulting crop yield and quality. Well-known problems that are associated with B. cinerea are specific off-flavors, poor filterability, and brownish color in white wines. The development of a B. cinerea infection strongly depends on weather conditions and is highly variable through different vintages. Typical control measures include defoliation and the use of fungicides, which involves high personnel and material costs. They also involve a great risk, especially since the effectiveness and time point of these treatments are difficult to predict. The frequency and severity of B. cinerea infections in Germany will increase due to climate change-induced alteration of weather conditions and the rise of new pathogen strains. In warmer, drier years, heavy Botrytis infection has already been observed, indicating the development of more aggressive strains. Common practices to deal with the negative effects of Botrytis on wine quality have been demonstrated to be ineffective and need to be reconsidered. To approach this problem, first experiments investigating oenological usage of coal and tannins in Botrytis infested must have been conducted. Sensory analysis and CATA confirmed, that common practices are not sufficient enough to battle Botrytis induced off-flavors. According to our results no clear positive effect of tannin treatment could be observed. To obtain more insight into the diversity of Botrytis strains, a PCR fingerprinting method is going to be established, as well as a qPCR method for biomass detection in to obtain more knowledge about climate based developments of B. cinerea. A method for detecting Botrytis induced aroma compounds like Geosmine and 1- Octen- 3-ol, was optimized by using a new CG-MS method. First results show success in validating different strains as well as detecting different aroma compounds in GC-MS.

DOI:

Publication date: June 27, 2022

Issue: IVAS 2022

Type: Poster

Authors

Backmann Louis1, Umberath Kim-Marie2, Wegmann-Herr Pascal1 and Scharfenberg-Schmeer Maren3

1Institute for Viticulture and Enology (DLR-Rheinpfalz)
2Institute of Nutritional and Food Sciences, Bonn
3Microbiology, HS Kaiserslautern 

Contact the author

Keywords

Botrytis,enological treatments, sensory analysis,PCR, qPCR, GC-MS

Tags

IVAS 2022 | IVES Conference Series

Citation

Related articles…

SHIRAZ FLAVONOID EXTRACTABILITY IMPACTED BY HIGH AND EXTREME HIGH TEMPERATURES

Climate change is leading to an increase in average temperature and in the severity and occurrence of heatwaves, and is already disrupting grapevine phenology. In Australia, with the evolution of the weather of grape growing regions that are already warm and hot, berry composition including flavonoids, for which biosynthesis depends on bunch microclimate, are expected to be impacted [1]. These compounds, such as anthocyanins and tannins, contribute substantially to grape and wine quality. The goal of this research was to determine how flavonoid extraction is impacted when bunches are exposed to high (>35 °C) and extreme high (>45 °C) temperatures during berry development and maturity.
Read More

Catechins, NMR, Huntington’s disease, protein aggregation modulation

Catechins, a subclass of flavonoids widely found in plants and plant-based foods and beverages such as wine and tea, not only exhibit significant antioxidant properties [1], as extensively documented in the literature, but can also inhibit amyloid protein aggregation [2], a key process implicated in the onset of neurodegenerative diseases such as Parkinson’s, Alzheimer’s, and Huntington’s.

Read More

The use of remote sensing in South-African terroir research

The diversity of soil types in the Western Cape of South Africa leads to high levels of within-vineyard variability. Multispectral remote sensing has received a lot of attention recently in the South-African wine industry in an attempt to identify and deal with this variability.

Read More

Classification of the wine-growing environment of Central Mancha (Spain). First works

This paper describes a zoning study performed on a vast territory of around 86,500 hectares, situated in the countryside area of La Mancha Central (Castilla-La Mancha). The aim of the study was to classify the environment according to a small number of ecological criteria, establish the relevant territorial units and generate thematic maps with the different levels of criteria employed and synthetic maps by crossing these criteria.

Read More

Les effets du terroir ou l’expression des potentiels à valoriser

Research into the effects of the Terroir is of major interest for the wine sector. The study of Terroir-Vine-Grape relations, even if it is complex, is fundamental for all viticulture: indeed, the quality of the grape must be the result of the most reasoned agro-viticultural management of the vine possible, which must first, to respect a production balance. The goal sought by the winegrower is to obtain a wine, the optimized result of the interactions Terroir-Grape variety. This link to the terroir is therefore essential to establish by taking into account on the one hand the behavior of the vine (which is the cause), and on the other hand, its effects on the grapes and finally on the wine.

Read More