Terroir 1996 banner
IVES 9 IVES Conference Series 9 Les terroirs : variae causarum figurae

Les terroirs : variae causarum figurae

Abstract

Le juriste se sent intrus pour parler des terroirs. Il regarde la presse et essaye de comprendre. On peut y lire à propos de la fête de la cuisine du 30 mai 1996 qui “..met en valeur des produits dont la qualité dépend d’un terroir”, que le Camembert du pays d’Auge est le seul à être protégé, je pensais au camembert de Normandie, que 80 % de la feta grecque est fabriquée aux Pays Bas, je croyais que c’était au Danemark, et que la Communauté européenne protège les indications géographiques de provenance IGP, sans doute une catégorie nouvelle remplaçant les indications géographiques protégées (1). J’ai appris aussi que les distributeurs redemandent des produits du terroir car “ils viennent brouiller les cartes dans la partie engagée avec les grandes marques”. Carrefour a ses “Terroirs et tiroirs”, Prisunic son “Vent d’Ouest”, Intermarché “Les bouquets du terroir”, Monoprix “Les terroirs de France” (2), Promodés et sa marque “Reflets de France” pour les hypermarchés “Continent” (3). Dans le même temps on affirme que “Le terme est un simple nom commun. Improtégeable et donc improtégé” (4).

Certes le vin et le terroir restent encore très majoritairement liés pour les consommateurs, mais au rythme actuel, le terroir non viticole risque la dépréciation rapide et le terroir viticole la banalisation par osmose. La publicité n’est pas en reste. Un dépliant décrit un produit comme un “grand cru” issu d’un “terroir exceptionnel”, l’un des “cent sites remarquables du goût”, auquel s’ajoute le “savoir faire de l’homme”, et continue encore “Les différents cépages sont pour nous les nombreuses plantes et épices que nous utilisons..”. Il s’agit d’une boisson spiritueuse anisée(5). Pour brouiller encore les cartes citons la campagne publicitaire estivale d’un vin sur “un positionnement original” grâce au slogan “Son terroir, c’est la mer” (6). Opérant un repli stratégique consécutif à l’effroi le juriste regarde avec attention l’objet habituel de ses réflexions: les textes. Les textes français et naturellement les textes communautaires et aussi quelques sources internationales. A quelques exceptions près, d’importance très modeste, les textes n’emploient jamais ou presque le vocable terroir. Terroir est un vocable utilisé, éventuellement, par les juristes, mais ce n’est pas un vocable à signification juridique (7). On se tourne alors vers les études scientifiques consacrées au(x) terroir(s). Aux yeux d’un juriste le contenu de la notion scientifique de terroir est évolutif mais avec un objectif de caractérisation pratiquement unique qui est la délimitation d’une “..aire de production..” pour le droit français (8), une “..région déterminée..” ou une “..aire géographique..” dans le droit communautaire (9). Il s’agit d’optimiser les caractéristiques d’une production en effectuant un zonage, en l’occurrence un mésozonage. Le lien terroir-appellation d’origine apparaît : “Constitue une appellation d’origine, la dénomination d’un pays, d’une région ou d’une localité servant à désigner un produit qui en est originaire et dont la qualité ou les caractères sont dus au milieu géographique, comprenant des facteurs naturels et des facteurs humains” (10). Est-ce à dire que le terroir se moule sur l’appellation d’origine etomporte dans son étude les facteurs naturels et les facteurs humains? L’équivalence terroir-appellation d’origine a pu être pratiquée par les scientifiques. De même la distinction des facteurs naturels et des facteurs humains a pu être variable dans sa signification (11). Aujourd’hui la notion scientifique de terroir parait devoir être comprise comme incluant seulement les éléments naturels du milieu, les facteurs naturels de l’appellation d’origine. Le terroir est l’ensemble des facteurs naturels d’une appellation d’origine, c’est à dire d’une aire de production déterminée produisant des vins “..aux caractéristiques qualitatives particulières..” (12). Mais en quelques années les réglementations nationales et communautaires, les conventions internationales, ont beaucoup changé. Le lien au terroir a fait recette et les noms géographiques sont devenus de plus en plus attractifs. Il faut vendre ce que l’on produit.

Le terroir reste toujours consubstantiel pour l’appellation d’origine, mais il a fallu tenir compte de produits autres que les vins. Il a fallu tenir compte de situations différentes de celles qui correspondent au moule de l’appellation d’origine à la française, typiquement et essentiellement vinicole. On a vu apparaître d’autres définitions depuis 1992: celles de l’indication géographique protégée – IGP dans la Communauté européenne et de l’indication géographique reconnue – IGR à l’O.I.V.. On a vu apparaître aussi les indications géographiques en 1994 dans l’un des accords résultant du cycle de l’Uruguay, l’Accord sur les Droits de Propriété Intellectuelle qui touchent au Commerce – ADPIC (Agreement on Trade related aspects of intellectual property rights – TRIPS).

Au travers de ces définitions y-a-t-il migration, influence, ou abandon de la notion de terroir ? peut-on penser qu’il existe désormais une gamme de terroirs ? (I). Par ailleurs les produits issus d’un lieu déterminé sont désignés par un nom géographique, parfois par une dénomination traditionnelle. La solution habituelle pour les appellations d’origine est-elle transmissible aux nouvelles situations d’indication géographique? Les noms des terroirs méritent aussi notre attention (II).

DOI:

Publication date: March 25, 2022

Issue: Terroir 1996

Type : Poster

Authors

J. AUDIER

Faculté de droit et de science politique d’Aix-Marseille
3, avenue R. Schuman 13628 Aix en Provence cedex 1

Tags

IVES Conference Series | Terroir 1996

Citation

Related articles…

A multidisciplinary approach to evaluate the effects of the training system on the performance of “Aglianico del Vulture” vineyards

Vineyards are complex agro-ecosystems with high spatial and temporal variability. An efficient training system may counteract the adverse effects of this variability. Moreover, considering the climate change issues, choosing an efficient training system that enhances water use and protects the vines from radiative thermal stress has become a priority for the farmers. A multidisciplinary approach that assesses the soil-crop-yield-wine relationships of vineyards in a distributed and holistic way could bring added knowledge on the behavior of the different training systems. This ongoing research aimed to implement a multidisciplinary approach to study the behavior of “Aglianico del Vulture” grapevines trained with two different systems: a spurred cordon (SC) and an “Alberello in parete” (AL), grown in a high-quality wine production area of Basilicata region (Italy). The approach merged several methods and scales of soil, ecophysiology, must/wine quality, and spectral data collection to assess the influence of the training system. Homogeneous zones (HZs) in both training systems were defined through a procedure based on geomorphological classification, unmanned aerial vehicles (UAV) images analysis, and a traditional soil survey supported by geophysical scanning. During the 2021 season, TDR probes monitored soil water content, while grapevine health status was assessed using eco-physiological measurements (LWP, chlorophyll content, PSII photosynthetic efficiency, LAI, and point-based field spectroscopy). These grapevine in-vivo measurements validated the spectral vegetation indexes (NDVI, RENDVI, CVI, and TVI) derived from the UAV multispectral imagery, which monitored the grapevine status in a distributed and non-invasive way. Grape yield, quality of berries, must and wine were measured to assess the effects of the training systems. The first experimental year results showed the variability of the vineyards and revealed relationships among soil parameters, crop characteristics, and vegetation indices of the SC and AL training systems. This multidisciplinary study could bring new insights into the vineyard training system’s effects on grape yield and wine quality.

Modeling island and coastal vineyards potential in the context of climate change

Climate change impacts regional and local climates, which in turn affects the world’s wine regions. In the short term, these modifications rises issues about maintaining quality and style of wine, and in a longer term about the suitability of grape varieties and the sustainability of traditional wine regions. Thus, adaptation to climate change represents a major challenge for viticulture. In this context, island and coastal vineyards could become coveted areas due to their specific climatic conditions. In regions subject to warming, the proximity of the sea can moderate extremes temperatures, which could be an advantage for wine. However, coastal and island areas are particular prized spaces and subject to multiple pressures that make the establishment or extension of viticulture complex.
In this perspective, it seems relevant to assess the potentialities of coastal and island areas for viticulture. This contribution will present a spatial optimization model that tends to characterize most suitable agroclimatic patterns in historical or emerging vineyards according to different scenarios. Thanks to an in-depth bibliography a global inventory of coastal and insular vineyards on a worldwide scale has been realized. Relevant criteria have been identified to describe the specificities of these vineyards. They are used as input data in the optimization process, which will optimize some objectives and spatial aspects. According to a predefined scenario, the objectives are set in three main categories associated with climatic characteristics, vineyards characteristics and management strategies. At the end of this optimization process, a series of maps presents the different spatial configurations that maximize the scenario objectives.

The potential of multispectral/hyperspectral technologies for early detection of “flavescence dorée” in a Portuguese vineyard

“Flavescence dorée” (FD) is a grapevine quarantine disease associated with phytoplasmas and transmitted to healthy plants by insect vectors, mainly Scaphoideus titanus. Infected plants usually develop symptoms of stunted growth, unripe cane wood, leaf rolling, leaf yellowing or reddening, and shrivelled berries. Since plants can remain symptomless up to four years, they may act as reservoirs of FD contributing to the spread of the disease. So far, conventional management strategies rely mainly on the insecticide treatments, uprooting of infected plants and use of phytoplasma-free propagation material. However, these strategies are costly and could have undesirable environmental impacts. Thus, the development of sustainable and noninvasive approaches for early detection of FD and its management are of great importance to reduce disease spread and select the best cultural practices and treatments. The present study aimed to evaluate if multispectral/hyperspectral technologies can be used to detect FD before the appearance of the first symptoms and if infected grapevines display a spectral imaging fingerprint. To that end, physiological parameters (leaf area, chlorophyll content and photosynthetic rate) were collected in concomitance to the measurements of plant reflectance (using both a portable apparatus and a remote sensing drone). Measurements were performed in two leaves of 8 healthy and 8 FD-infected grapevines, at four timepoints: before the development of disease symptoms (21st June); and after symptoms appearance (ii) at veraison (2nd August); at post-veraison (11th September); and at harvest (25th September). At all timepoints, FD infected plants revealed a significant decrease in the studied physiological parameters, with a positive correlation with drone imaging data and portable apparatus analyses. Moreover, spectra of either drone imaging and portable apparatus showed clear differences between healthy and FD-infected grapevines, validating multispectral/ hyperspectral technology as a potential tool for the early detection of FD or other grapevine-associated diseases.

Use of multispectral satellite for monitoring vine water status in mediterranean areas

The development of new generations of multispectral satellites such as Sentinel-2 opens possibilities as to vine water status assessment (Cohen et al., 2019). Based on a three years field campaign, a model of Stem Water Potential (SWP) estimation on vine using four satellite bands in Red, Red-Edge, NIR and SWIR domains was developed (Laroche-Pinel et al., 2021). The model relies on SWP field measures done using a pressure chamber (Scholander et al., 1965), which is a common, robust and precise method to assess vine water status (Acevedo-Opazo et al., 2008). The model was mainly developed from from SWP measures on Syrah N (Laroche Pinel E., 2021).

A large scale monitoring was organized in different vineyards in the Mediterranean region in 2021. 10 varieties amongst the most represented in this area were monitored (Cabernet sauvignon N, Chardonnay B, Cinsault N, Grenache N, Merlot N, Mourvèdre N, Sauvignon B, Syrah N, Vermentino B, Viognier B). The model was used to produce water status maps from Sentinel-2 images, starting from the beginning of June (fruit set) up to September (harvest). The average estimated SWP for each vine was compared to actual field SWP measures done by wine growers or technicians during usual monitoring of irrigation programs. The correlations between mean estimated SWP and mean measured SWP were at the same level than expected by the model. (Laroche Pinel, 2021) The general SWP kinetics were comparable. The estimated SWP would have led to same irrigation decisions concerning the date of first irrigation in comparison with measured SWP.

Acevedo-Opazo, C., Tisseyre, B., Ojeda, H., Ortega-Farias, S., Guillaume, S. (2008). Is it possible to assess the spatial variability of vine water status? OENO One, 42(4), 203.
Cohen, Y., Gogumalla, P., Bahat, I., Netzer, Y., Ben-Gal, A., Lenski, I., … Helman, D. (2019). Can time series of multispectral satellite images be used to estimate stem water potential in vineyards? In Precision agriculture ’19, The Netherlands: Wageningen Academic Publishers, pp. 445–451.
Laroche-Pinel, E., Duthoit, S., Albughdadi, M., Costard, A. D., Rousseau, J., Chéret, V., & Clenet, H. (2021). Towards vine water status monitoring on a large scale using sentinel-2 images. remote sensing, 13(9), 1837.
Laroche-Pinel,E. (2021). Suivi du statut hydrique de la vigne par télédétection hyper et multispectrale. Thèse INP Toulouse, France.
Scholander, P.F., Bradstreet, E.D., Hemmingsen, E.A., & Hammel, H.T. (1965). Sap pressure in vascular plants: Negative hydrostatic pressure can be measured in plants. Science, 148(3668), 339–346.

Projected changes in vine phenology of two varieties with different thermal requirements cultivated in La Mancha DO (Spain) under climate change scenarios

The aim of this work was to analyze the phenology variability of Tempranillo and Chardonnay cultivars, related to the climatic characteristics in La Mancha Designation of Origin, and their potential changes under climate change scenarios. Phenological dates referred to budbreak, flowering, veraison and harvest were analyzed for the period 2000-2019. The weather conditions at daily time scale, recorded during the same period, were also evaluated. The thermal requirements to reach each of these phenological stages were calculated and expressed as the GDD accumulated from DOY=60. Changes in phenology were projected by 2050 and 2070 taking into account those values and the projected temperatures and precipitation, simulated under two Representative Concentration Pathway (RCP) scenarios –RCP4.5 and RCP8.5– using an ensemble of models. The average phenological dates during the period under study were, April 16th ± 6.6 days and April 5th ± 6.0 days for budbreak, May 31st ± 6.0 days and May 27th ± 5.3 days for flowering, July 26th ± 5.6 days and July 25th ± 5.8 days for veraison, and Ago 23rd ± 10.8 days and Ago 17th ± 9.0 days for harvest, respectively, for Tempranillo and Chardonnay. The projected changes in temperature imply an average change in the maximum growing season (April-August) temperatures of 1.2 and 1.9°C by 2050, and 1.6 and 2.6°C by 2070, under the RCP4.5 and RCP8.5 scenarios, respectively. A reduction in precipitation is predicted, which vary between 15% for 2050 under RCP4.5 scenario and up to 30% by 2070 under RCP8.5. The advance of the phenological dates for 2050, could be of 6, 7, 7, and 8 days for Tempranillo and 4, 6, 6 and 9 days for Chardonnay, respectively for budbreak, flowering, veraison and harvest under the RCP4.5 scenario. Under the RCP8.5 emission scenario, the advance could be up to 30% higher.