terclim by ICS banner
IVES 9 IVES Conference Series 9 International Congress on Grapevine and Wine Sciences 9 2ICGWS-2023 9 Exploring the prevalence of esca-induced leaf symptoms in French vineyards and the role of climate: a national scale analysis

Exploring the prevalence of esca-induced leaf symptoms in French vineyards and the role of climate: a national scale analysis

Abstract

Esca, a severe trunk disease affecting vineyards, is caused by fungal pathogens that induce wood necrosis and decay, leaf symptoms, yield losses, and potentially a rapid death of the vine. The prevalence of this disease varies across years, regions, cultivars, and plot ages. Despite its significance in understanding and predicting dieback risk in different vineyards, the role of climate in trunk diseases remains a relatively unexplored research area. While some studies have demonstrated the impact of certain climatic conditions on the prevalence of the disease, they often focus on a limited number of plots and yield conflicting results.We conducted a statistical analysis, using a Bayesian approach on a national database comprising prevalence data of esca from over 500 different plots in France, spanning the years 2003 to 2022 and encompassing various cultivars. The aim was to identify the climatic risk factors while considering plot-specific factors such as cultivar and age. Climate factors as soil moisture and temperature were assessed with the French climate database SAFRAN.

The results revealed a non-linear relationship between age and esca prevalence, which was dependent on the cultivar. Specifically, we observed that prevalence tends to increase between the ages of 15 and 40 years, varying with the cultivar, and subsequently declined gradually. Furthermore, significant effects were found, particularly indicating an increase in esca prevalence with higher soil moisture levels. Conversely, an increase in average air temperature tends to decrease the prevalence of esca in the field. These results highlighted the importance of climatic factors on esca prevalence.

Acknowledgements: We would thank the Plan National Dépérissement du Vignoble for funding this research. We would thank all the technical partners throughout France who gave us access to their data.

DOI:

Publication date: October 4, 2023

Issue: ICGWS 2023

Type: Article

Authors

Lucas Etienne1*, Lucia Guérin-Dubrana1, Frédéric Fabre1, Elise Frank3, Davide Martinetti2, Lucie Michel3, Valérie Bonnardot4, Chloé Delmas1

1 INRAE, ISVV, Bordeaux Sciences Agro, Santé et Agroécologie du Vignoble, 33140 Villenave d’Ornon, France
2 INRAE, Biostatistiques et Processus Spatiaux, 84000 Avignon, France

3 INRAE, Plateforme ESV, Biostatistiques et Processus Spatiaux, 84914 Avignon, France
4 CNRS, Université Rennes 2, Littoral Environnement Télédétection Géomatique, 35045 Rennes, France

Contact the author*

Keywords

trunk disease, climatic conditions, statistical analysis

Tags

2ICGWS | ICGWS | ICGWS 2023 | IVES Conference Series

Citation

Related articles…

Ability of lactic acid bacterial laccases to degrade biogenic amines and OTA in wine

Two of the most harmful microbial metabolites for human health that can be present in wines and either fermented or raw foods are biogenic amines (BA) and ochratoxine A (OTA). Winemakers are aware of the need to avoid their presence in wine by using different strategies, one of them is the use of enzymes. Some recombinant laccases have been characterized and revealed as potential tools to degrade these toxic compounds in wine[1], specifically biogenic amines[2].

Photoprotective extracts from agri-food waste to prevent the effect of light in rosé wines 

Light is responsible for adverse reactions in wine including the formation of unpleasant flavors, loss of vitamins or photodegradation of anthocyanins. Among them, the riboflavin degradation leads to the formation of undesirable volatile compounds, known as light-struck taste. These photo-chemical reactions could be avoided by simply using opaque packaging. However, most rosé wines are kept in transparent bottles due to different commercial reasons. Some agri-food waste extracts have been studied for their photoprotective action which turn to be highly correlated with phenolic content [1].

Model-assisted analysis of the root traits underlying RSA genotypic diversity in Vitis: a promising approach for rootstock selection?

By dissecting the root system architecture (RSA) into its underpinning components (e.g. root emission, axial growth, radial growth, branching, root direction or tropism) and identifying the relationships between them, functional-structural 3D root models are promising tools for analyzing the diversity and complexity of root system phenotypes with Genotype × Environment interactions. The model parameters are assumed to be synthetic traits, less influenced by the environment, and consequently with less polygenic architectures than the integrative RSA traits they drive. Root models can serve as a basis for in silico development of root system ideotypes by highlighting the developmental processes and parameters that most likely influence RSA fitness.

Acceptability of canned wines: effect of the level of involvement of consumers and type of wine

In recent years there has been a growing demand for alternative packaging designs in the food industry focused on diminishing the carbon footprint. Despite the environmental advantages of cans versus bottles, the traditional environment of wine has hindered the establishment of less contaminant containers. In this context, the objective of this study was to understand and generate knowledge about consumers´ perception of canned wines in comparison to bottled wines.

REGAVID a decision tool to deficit irrigation in a temperate climate (DO Monterrei – Spain)

In temperate climates, such as in the North of Spain, the use of irrigation in the vineyard has not been required, due to the usual rainfall from June to August. In some large vineyards, irrigation management has been carried out, based on occasional support irrigation, or for the application of nutrients (fertigation). Currently it is necessary to implement decision support models to manage irrigation water in real time and avoid misuse of a scarce resource. Moreover, quality standards must be achieved, as in the previous rainfed viticulture.