terclim by ICS banner
IVES 9 IVES Conference Series 9 Short-term relationships between climate and grapevine trunk diseases in southern French vineyards

Short-term relationships between climate and grapevine trunk diseases in southern French vineyards

Abstract

An increasing plant dieback has been observed in vineyards these past two decades, that has been partly attributed to the incidence of grapevine trunk diseases. Among them, esca and Botryosphaeria dieback are increasingly affecting grapevine mortality and yield loss, but little is known about the relationships between leaf symptoms and climate, hampering our ability to predict future trends in grapevine dieback. Our aim was to test short-term relationships between weather conditions and leaf symptom incidence in southern France vineyards. We harmonized and compiled summer surveys leaf symptoms of grapevine trunk disease in a database gathering 50 vineyards. Surveys were conducted on a weekly to bimonthly basis during the period 2003-2021, leading to 69 site-by-year plots. Vineyards were characterised by different ages (8 to 37 years old plants), grapevine varieties (n = 11), cultural practices, soil and climate conditions. Climate data were compiled from Safran daily data of Météo-France and averaged on different time steps. For each plot, we derived weekly rates of leaf symptom incidence using non-parametric Loess models. To account for contrasting conditions among vineyards, we scaled both leaf symptom and climate data, focusing on variations relative to plot. Statistical models show highly significant relationships between local leaf symptom trends and climatic conditions on a weekly to monthly time step. As expected, the higher the evaporative demand (temperature and humidity) the higher the incidence of new weekly cases. However, an increase in drought conditions and wind speed inhibited the incidence of leaf symptoms. Our results suggest that fungi associated with grapevine trunk diseases benefit from warm conditions but are inhibited by dry conditions that both are expected to increase in the next future. Our findings provide important insights to better understand plant-climate-diseases relationships in the field and anticipate trends for the next decades.

DOI:

Publication date: May 31, 2022

Issue: Terclim 2022

Type: Article

Authors

Thibaut Fréjaville1, Lucia Guérin-Dubrana1, Philippe Larignon2, Pascal Lecomte
and Chloé E.L. Delmas1

1INRAE, Bordeaux Sciences Agro, ISVV, Santé et Agroécologie du Vignoble (SAVE), Villenave d’Ornon, France
2Institut Français de la Vigne et du Vin, Pôle Rhône-Méditerranée, Rodilhan, France

Contact the author

Keywords

esca, Botryosphaeria dieback, modelling, weather, weekly incidence rate

Tags

IVES Conference Series | Terclim 2022

Citation

Related articles…

IDENTIFICATION AND LEVELS OF PHENOLIC COMPOUNDS (TANINS, ANTHO-CYANS) IN RED VARIETAL WINES (PROKUPAC AND BLACK TAMJANIKA) FROM SERBIA

The phenolic compounds of red wines represent a source of numerous benefits for human health, which is why they are a constant subject of scientific research. Winemaking in Serbia has a growing economic significance, with particularly autochthonous varieties included [1]. This research identifies and quantifies phenolic compounds of Serbian red varietal wines of Prokupac and Black Tamjanika varieties. Quantification of the level of phenolics has been conducted, including molecular tannins [(+)-catechin, (-)-epicatechin, procyanidin dimers B1, B2, B3, B4], molecular anthocyanins, and the mean degree of polymerization of tannins by HPLC by UV detection, total antioxidant capacity via spectrophotometric methods and chromatic characteristics via CIELAB.

Assessment of antimicrobial effect of chitosan extracted from different sources against unwanted wine microorganisms

During wine production process high attention to the microbiological control from fermentation of the grape must to bottling is necessary. In fact, control of the indigenous microflora of the grape ensures correct fermentation activity of the inoculated starter, while control of the microorganisms in the finished wine is essential to prevent wine spoilage and to ensure the dominance of the desired bacteria when malolactic fermentation is required (Mas and Portillo, 2022).

Vertical temperature gradient in the canopy provides opportunities to adapt training system in a climate change context

Aims: The aims of this study were (1) to measure the vertical temperature gradient in the vine canopy in parcels with different vineyard floor management practices and (2) to analyze the factors influencing this gradient. The objective was to investigate whether the increase of trunk height could be an adaptation strategy to reduce air temperature in the bunch zone in a context of climate change. 

Influence of plant growth regulators and water deficit on cv. Krissy table grape

Context and purpose of the study. The quality of table grape clusters significantly affects consumer perception and market value, with berry size, texture, color, and overall appearance playing key roles.

Geospatial technologies in spatially defined viticulture: case study of a vineyard with Agiorgitiko variety in Koutsi, Nemea, Greece

Geospatial technologies have significant contribution to viticulture, especially in small-scale vineyards, which require precise management. Geospatial data collected by modern technologies, such as Unmanned Aerial Vehicle (UAV) and satellite imagery, can be processed by modern software and easily be stored and transferred to GIS environments, highlighting important information about the health of vine plants, the yield of grapes and the wine, especially in wine-making varieties. The identification of field variability is very important, particularly for the production of high quality wine. Modern geospatial data management technologies are used to achieve an easy and effortless localization of the fields’ variability.