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.

Download the PDF

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…

Towards a unified terroir zoning methodology in viticulture

In viticulture, terroir is a key concept that refers to an area and thus possesses a geographical dimension. Hence, zoning of viticultural terroir is an important issue
Read More

Exploring the impact of yeast derivatives on aromatic and sensory profiles of white and red wines: a multifactorial analysis

Specific inactivated yeast derivatives (SYDS) are obtained from s. cerevisiae yeasts by various processes (thermal, mechanical, and enzymatic) and have diverse oenological applications to improve wine quality. However, different impacts on wine sensory and aromas were reported, depending on syds types and fractions, wine matrices, and experimental settings. Few works have examined the impact of SYDS on aromas considering also those on wine macromolecules influencing organoleptic properties.

Read More

Anthocyanins, flavonols and hydroxycinnamates of eight vitis vinifera cultivars from the balearic islands

In 2008 the anthocyanin, flavonol and hydroxycinnamate (HCT) contents of the skins of five coloured berry cultivars (‘Escursac’, ‘Esperó de Gall’, ‘Galmeter’, ‘Valent negre’ and ‘Vinater negre’), of two white cultivars (‘Argamussa’ and ‘Prensal blanc’) and of one weakly rose cultivar (‘Giró ros’), native from Balearic Islands, were characterized.

Read More

Application of high-throughput sequencing tools for characterisation of microbial communities during alcoholic fermentation

Developments in high-throughput sequencing (HTS) technologies allow us to obtain large amounts of microbial information from wine and must samples. Thus approaches, that are aimed at characterising the microbial diversity during fermentation, can be enhanced, or possibly even replaced, with HTS-based metabarcoding. To reduce experimental biases and increase data reproducibility, we compared 3 DNA extraction methods by evaluating differences in the fungal diversity with Riesling alcoholic fermentation samples at four different vineyards. The fungal diversity profiling was done using the genetic markers ITS2 and D2 using metabarcoding. The extraction methods compared consisted of a commercial kit, a recently published protocol that includes a DNA enhancer, and a protocol based on a buffer containing common inhibitor removal reagents. All methods were able to distinguish vineyard effects on the fungal diversity, but the results differed quantitatively.

Read More

International Terroir Congress: 14 years of scientific proceedings!

We are a partner of the International Terroir Congress. For 4 months, our team has been putting the congress archives online. We are very proud to announce that the 14 years of archives are finally available. All archives of the International Terroir Congress are...
Read More