Terroir 2006 banner
IVES 9 IVES Conference Series 9 International Terroir Conferences 9 Terroir 2006 9 Influence of vine water status (Terroir 2006) 9 Grapevine sensitivity to fungal diseases: use of a combination of terroir cartography and parcel survey

Grapevine sensitivity to fungal diseases: use of a combination of terroir cartography and parcel survey

Abstract

In front of the economic interest and seeking to respect their environment, the wine growers move gradually towards a policy of reasoning their plant health protection. This is why, starting from epidemiologic studies on grapevine pathogens, forecasting models of the risks are developed by research and experimentation bodies. These models propose only a general diagnosis at the scale of the « small area » based primarily on the climatic variables related to the climate of the vintage. In the event of important risks, the professionals are sensitized and can protect their whole vineyard. However, secondary factors are also known to intervene on the sensitivity of the vine. Those are related to the soil, the surrounding landscape or the planting material and are characteristic of a reduced area of land. The present study seeks to (1) evaluate the effect of the secondary factors on the sensitivity of the vine and (2) to create some sensitivity maps in order to better forecast the mildew and powdery risks at the plot level. The used method is based on the combination of terroir cartography, parcel survey and expertise. The influence of cartographic variables on parasitic development has been tested by using statistical methods. The results indicate that, in the Loire Valley, soil is the main influential secondary factor that affects the plot sensitivity to mildew. In this respect, the weathering model « Roche-Altération-Altérite », developed by the Grapevine and Wine Research Unit of INRA (Angers 49, France) constitutes a pertinent index. For powdery mildew, the surrounding landscape has a marked effect on the plot sensitivity.

DOI:

Publication date: January 12, 2022

Issue: Terroir 2006

Type: Article

Authors

Étienne GOULET (1), Eléonore CADY (1,2,3), Philippe CHRÉTIEN (2) and Dominique RIOUX (1)

(1) Cellule « Terroirs Viticoles », Confédération des Vignerons du Val de Loire
42 rue Georges Morel, 49071 Beaucouzé cedex
(2) Station régionale Val de Loire- ITV France, 42 rue Georges Morel, 49071 Beaucouzé cedex, France
(3) École Supérieure d’Agriculture d’Angers, 55 rue Rabelais, 49007 Angers cedex 01, France

Contact the author

Keywords

Terroir, grapevine, fungal diseases, cartography, survey

Tags

IVES Conference Series | Terroir 2006

Citation

Related articles…

Possible methods of adaptation to the effects of climate change in the Tokaj Wine Region 

Viticulture’s adaptation to the harmful effects of climate change is globally the biggest challenge of the near future. Short, extremely intensive rainfalls and longer periods of drought are getting more frequent in the Tokaj Wine Region, where the majority of the vineyards are cultivated on steep slopes. Hence, erosion has high risk, especially when combined with the loess-based soils on about ten percent of the region. The environmentally beneficial cover crop and mulch usage can effectively reduce the risk of erosion, according to research done by the Tokaj Wine Region Research Institute of Viticulture and Oenology.

Investigation on harvesting period choices for correct interpretation of experimental results

Happens too often in scientific papers to find the same harvesting period of a cultivar, although the used treatment influence a maturity curve of investigated thesis.
This inevitably leads to wrong conclusions when comparing the treatment effects, since obtained on maturity stages more or less far from those technologically correct.

Using GIS to assess the terroir potential of an Oregon viticultural region

Deciding to grow grapes in Oregon is complex issue due to our diverse geography, climate, and relatively short history of grape growing. For any potential grape grower, vineyard site selection is the single most important decision they will face.

MICROFLUIDIC PLATFORM FOR SORTING YEAST CELLS ACCORDING TO THEIR MORPHOLOGY

In this work we briefly present a microfluidic device aiming to sort yeast cells according to their morphology. The technology is based upon microfluidic chips made out of Polydimethylsiloxane and glass using soft lithography processes and replica molding. The microfluidic device was used for encapsulating single yeast cells in liquid droplets containing growth medium. Liquid droplet containing yeast cells were sorted using a real time imaging and decision-making process.

Innovative approaches for fungicide resistance monitoring in precision management of grapevine downy mildew

Effective control with fungicides is essential to protect grapevine from downy mildew, a devastating disease caused by the oomycete Plasmopara viticola. Managing this disease faces challenges in maintaining fungicide efficacy as the number of modes of action decreases and the risk of fungicide resistance increases. Long-term measures should address strains resistant to multiple modes of action, that can be selected by the repeated use of single-site fungicides. For these reasons, a precision management of the disease, that considers the selection of the best fungicide schedule according to the sensitivity profile of the pathogen population, is needed.