Viticulture

22 April 2025

Composting vine leaves to reduce the primary inoculum of Plasmopara viticola in the vineyard?

Downy mildew caused by the oomycete Plasmopara viticola is one of the most damaging diseases affecting vineyards. The current issues surrounding the use of plant protection products are prompting the ...
Eva Courchinoux, Pierre-Adrien Roux, Marie Rodriguez, Isabelle Demeaux, Séverine Dupin, Laurent Deliere, Marc Raynal, Charlotte Poeydebat
7 April 2025

Applications of biochar in viticulture

In the past decade, what is now known as ‘biochar’ has been widely endorsed for a variety of industrial applications and has seen exponential interest in agronomic uses. However, its use remains limited in the viticulture sector, particularly ...
Nicolas Poly, Benjamin Bois
17 February 2025

The intravarietal diversity of sugar concentration in Merlot depends more on late evaporation than sugar loading

The rise in temperature associated with climate change can lead to excessive sugar concentrations at harvest. To maintain varietal typicity in the future, more resilient genotypes need to be identified within clonal ...
Victoria Lesbats-Sichel, Patrice This, Thierry Lacombe, Loïc Le Cunff, Charles Romieu
17 February 2025

Impact of training system, soil management, and soil water holding capacity on vine water status in the Cognac production area under climate change

With climate change, the risk of water deficits in vineyards is tending to increase, potentially affecting yield and grape quality potential. In this study, the Lebon et al. (2003) soil water balance model was ...
Sébastien Zito, Benjamin Bois, Xavier Poitou, Cornelis van Leeuwen
14 February 2025

Characterization of sugar accumulation dynamics in grapes and the factors influencing this process at local scale

Determining the sugar concentration in grape berries is essential for winegrowers, as it enables them to estimate the alcohol content in the final wine and optimize the harvest date. In the face of climate change and rising ...
Laure de Rességuier, Lauren Inchboard, Amber K. Parker, Théo Petitjean, Cornelis van Leeuwen
12 February 2025

Respectful pruning in young vineyards: impact on growth and potential implications

In recent years, there has been a resurgence of interest in grapevine pruning. This growing focus has emerged as a response to the long-term issues that poor pruning practices have caused in vineyards. Decades of ...
Mónica Galar-Martínez, Nazareth Torres, Bárbara Sebastián, Julián Palacios, Ignacio Arzoz, Nahiara Juanena, Ana Villa-Llop, Maite Loidi, Coralie Dewasme, Jean-Philippe Roby, Luis Gonzaga Santesteban
12 February 2025

Improving the success rate of dead vine replacement

Dead vine replacement can be a very costly exercise in the event of failure, especially given that replacement vines take longer to reach full production than young plants from a completely replanted plot. Success, ...
Coralie Dewasme, Elisa Marguerit, Séverine Mary, Lauren Inchboard, Guillaume Darrieutort, Philippe Vivin, Virginie Lauvergeat
31 January 2025

A meta-analysis of the ecological impacts of viticultural practices on soil biodiversity

Soil quality and adequate soil management are key levers for sustainable viticulture. Until now, a global and comprehensive analysis of the impact of viticultural practices on soil biodiversity was lacking. We conducted a ...
Laure Gontier, Battle Karimi, Jean-Yves Cahurel, Lionel Ranjard
22 January 2025

Impact assessment of cover crops on the risk of frost in the Anjou vineyard

The increase in the frequency of spring frosts and the rising precocity of the phenological stages of the vine have been threatening the wine production in the Anjou vineyard for several years (Petitjean et al., 2022). In addition to ...
Laetitia Bau, Thomas Chassaing
20 January 2025

Part 1: Is there a correlation between the diameter of the pruning wound and the length of the desiccation cone?

While pruning is an age-old and essential practice for managing yields and keeping vines in production for as long as possible, many questions remain unanswered about its role in vine physiology, particularly with regard to the formation of ...
Emilie Bruez, Céline Cholet, Massimo Guidici, Marco Simonit, Mathilde Boisseau, Xavier Poitou, Patrice Coll, Laurence Gény-Denis
20 January 2025

Part 2: How long to form the desiccation cones of the chicot and when should be removed the chicot?

Leaving a chicot when pruning is now a widespread practice in vineyards, but the question remains as to when this zone of dead wood can be “re-pruned”. Can it be removed the year after pruning? Should you wait for a full ...
Emilie Bruez, Céline Cholet, Massimo Giudici, Marco Simonit, Mathilde Boisseau, Xavier Poitou, Patrice Coll, Laurence Gény-Denis
8 January 2025

Wrapping permanent cordon arms tightly around the cordon wire negatively impacts vine performance

In certain winegrowing regions, it is a common practice to wrap canes very tightly around the cordon wire during the establishment of permanent cordon arms. This method of training may result in a constriction of the ...
Patrick O’Brien, Cassandra Collins, Roberta De Bei
20 December 2024

Exploring grapevine canopy management: effects of removing main leaves or lateral shoots before flowering

This study highlights the physiological effects of pre-flowering leaf removal from the fruiting zone of the Swiss white grape variety Petite Arvine, which is rich in varietal thiols. Pre-flowering removal of main leaves ...
Thibaut Verdenal, Vivian Zufferey, Agnès Dienes-Nagy, Stefan Bieri, Gilles Bourdin, Jean-Sébastien Reynard, Jean-Laurent Spring
19 December 2024

Role of the rootstock and its genetic background in plant mineral status assessed by petiole analysis and deficiency symptoms

Rootstocks are potentially important levers of adaptation in the context of climate change. In this study, we investigated the effect of the rootstock and its genetic background on plant mineral status. The scion, the ...
Marine Morel, Sarah Jane Cookson, Jean-Pierre Da Costa, Nathalie Ollat, Elisa Marguerit
9 December 2024

Effect of biodynamic preparations 500 and 501 on vine and berry physiology, pedology and the soil microbiome

The increasing interest in organic and biodynamic wine production is driven by a desire for sustainability and reduced reliance on synthetic inputs. As of 2021, organic viticulture accounted for 6.4 % of the global vineyard ...
Markus Rienth, Frederic Lamy, Clément Chessex, Thierry Heger
29 November 2024

Vineyard Canopy Management: Timing of the First Hedge-Trimming

Delaying the date of the first hedge-trimming (or ‘tip-pruning’) is of limited technical value in vineyard canopy management. The impact of the delay on lateral shoot growth and must composition remains marginal ...
Thibaut Verdenal, Jean-Laurent Spring, Ágnes Dienes-Nagy, Stefan Bieri, Vivian Zufferey
22 November 2024

Effectiveness of hedges and nets in reducing the risk of drift and exposure of local residents during vineyard spraying: initial results

IFV and INRAE have used the EoleDrift test rig to measure the drift reduction performance of two types of plot modification (shrub hedges and windbreak nets). Whatever the sprayer used and the type of drift measured ...
Adrien Vergès, Olivier Naud, Elodie Trinquier, Xavier Ribeyrolles, Amélie Horain, Sonia Grimbuhler, Jean-Paul Douzals, Sébastien Codis
22 November 2024

COPPEREPLACE. Copper applications in organic viticulture, are a real challenge today. Part 2. Technical and practical implementation

In grape and wine production, one of the main relevant and recurrent diseases is downy mildew, caused by the fungus Plamospara viticola. It is frequently present in wine production worldwide, with a significant high annual incidence ...
Mario de la Fuente, António Graça, José Manso, Ivone Tomás, Natacha Fontes, Caroline Gouttesoulard, Bartosz Tylkowski, Magdalena Olkiewicz, Josep M. Montornes, Elena Sánchez, Emilio Gil, Ruth Pereira, Anabela Cachada, Cristiana Paiva, Beatriz Fernandes, Verónica Nogueira, Cátia Santos, Leonor Pereira, Luís Marcos, David Fernández Calviño
31 October 2024

Drought tolerance in grapevine involves multiple interacting physiological mechanisms

The past decade has produced some major advances in our understanding of how grapevines regulate their water use and tolerate drought. Numerous traits that are important for conferring drought tolerance have been identified ...
Gregory A. Gambetta, Chloé E. L. Delmas, Elisa Marguerit, Nathalie Ollat, Clément Saint Cast, Cornelis van Leeuwen, Sylvain Delzon
17 October 2024

Study of pesticide-use pathways during the agroecological transition of DEPHY-Vigne farms

Created in 2010, the DEPHY-Vigne network is formed of winegrowers who are committed to reducing the use of pesticides, and thus aims to demonstrate that such a change is possible using currently available techniques. The ...
Esther Fouillet, Laurent Delière, Nicolas Chartier, Sébastien Cortel, Albert Flori, Bruno Rapidel, Anne Merot
8 October 2024

Gradient of grapevine varietal susceptibility to esca

To study varietal susceptibility to esca, we recently analyzed the annual incidence of leaf symptoms on an experimental plot (2017–2023) (Gastou et al., 2024) and from a trunk-disease monitoring network in ...
Pierre Gastou, Lucas Etienne, Lucia Guerin-Dubrana, Chloé Delmas
30 September 2024

COPPEREPLACE 1. Copper applications in organic viticulture are a real challenge today.
Part 1 - Scientific Activities

In grape and wine production, one of the main relevant and recurrent diseases is downy mildew, caused by the fungus Plamospara viticola. It is frequently present in wine production worldwide, with a significant high annual incidence ...
Mario de la Fuente, António Graça, José Manso, Ivone Tomás, Natacha Fontes, Caroline Gouttesoulard, Bartosz Tylkowski, Magdalena Olkiewicz, Josep M. Montornes, Elena Sánchez, Emilio Gil, Ruth Pereira, Anabela Cachada, Cristiana Paiva, Beatriz Fernandes, Verónica Nogueira, Cátia Santos, Leonor Pereira, Luis Marcos, David Fernández Calviño
25 September 2024

Resumption of the planting of grapevine varieties in France, referred to as "disease-resistant"

This article investigates the beginning of the adoption of a new generation of “resistant” grapevine varieties (RVs) in France, in a European context in which varietal innovation has become more and more dynamic over the last thirty years.
Marc-Antoine Dolet, Caroline Paire, Foued Cheriet, Olivier Geffroy, Yves Le Fur, Hervé Hannin, Alain Samson, Soline Caillé, Sylvain Nougarède, Valérie Olivier, Christian Chervin
13 September 2024

History of breeding programmes for fungus resistant grape varieties in Europe, France and the Occitanie region

Fungus tolerant grape varieties (RVs) are emerging as a promising solution in a viticultural context characterised by growing societal, environmental, and regulatory tensions. Since the 1930s, several countries have launched research ...
Caroline Paire, Marc-Antoine Dolet, Hervé Hannin, Alain Samsom, Valérie Olivier, Christian Chervin, Oliver Geffroy, Foued Cheriet
13 August 2024

Impact of foliar nitrogen supplementation on Chardonnay and Sauvignon Blanc wines

The effectiveness of an application of foliar nitrogen at veraison depends on the initial level of vine nitrogen deficiency, an Agroscope study has shown. The threshold levels of assimilable nitrogen deficiency in the ...
Thibaut Verdenal, Jean-Laurent Spring, Ágnes Dienes-Nagy, Gilles Bourdin, Vivian Zufferey
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