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Objectif: La filiere « vin » est l’un des premiers poles economiques de la region de Haute Matsiatra (Madagascar), apres la riziculture. Tous les acteurs cherchent constamment a promouvoir ce secteur afin d’ameliorer la qualite des produits et augmenter par la suite la commercialisation de ces vins au niveau national, voire international. Nos recherches permettent d’etablir une bonne tracabilite qualitative des vins tropicaux de Madagascar, a tous les niveaux de chaine de production (cepage, production et commercialisation). Methodologie et resultats: Des parametres physico-chimiques et bacteriologiques sont determines pour permettre le controle qualite de differents types de vin (rouge, blanc sec, gris, blanc moelleux, rose et aperitif). L’influence « climat » affecte la preparation du vin. La forte pluviometrie avant le vendage reduit le taux de sucre du raisin. On a souvent recours a la chaptalisation, surtout pour le vin rouge. Pour les vins produits, on suspecte un taux d’acidite volatile tres eleve (2,254 a 4,067 g/L) par rapport aux normes internationales. La faible teneur en anhydride sulfureux (<150 mg/L pour les vins rouges, <200 mg/L pour les vins blancs) influence la stabilite du vin a la conservation. L'acide tartrique regule l'acidite du vin, mais il peut se precipiter en bitartrate de potassium a basse temperature (stockage a froid). Les differents types de vins analyses ont une teneur en bitartrate de potassium assez eleve, de 13,14 a 21,58 g/L. Cette teneur est faible dans les vins de qualite. Les analyses bacteriologiques montrent qu’aucune alteration biologique n’est observee dans les vins echantillonnes. Conclusion et application des resultats: Les acteurs nationaux suggerent la promotion effective de la filiere de la part de l’Etat. La creation d’un laboratoire agree et la mise en place d’une legislation specifique sont donc attendu pour recadrer le secteur. Mots-cles: cepage, chaptalisation, anhydride sulfureux, controle qualite, vin malgache, region de Haute Matsiatra, Fianarantsoa – Madagascar English Title:  Quality control of tropical wine production from the region of Haute- Matsiatra, in south of Madagascar English Abstract Objectives: Wine production is an economic focus in Haute Matsiatra district (Madagascar). Local actors were investigated to promote the wine sector and to improve the quality of products for national commercialization or on international level. This research allows establishment of a traceability study of the wine quality product, in the chain of the production level (grape production and commercialization). Methodology and results: physico-chemical and bacteriological parameters are used to determine the quality control of different types of wines (red wine, dry white wine, gray wine, sweet white wine, rose wine and aperitif wine). Climate affects the preparation of wine. The high rainfall reduces the sugar level. Therefore, they often resort to chaptalization, especially for red wine. In the product, a very high of volatile acidity (2,254 to 4,067 g / L) is suspected, compared to international standards. The low sulfur dioxide content (<150 mg / L for red wines, <200 mg / L for white wines) influence the stability of wine conservation. The tartaric acid regulates the acidity of wine, but it may precipitate as potassium bitartrate in a low temperature condition (cold storage). A different type of wine analyzed have a high level of potassium bitartrate, 13,14 to 21,58 g/L. It was low in the best wine. Bacteriological analyzes indicated that there was no biological alteration in the wines sampled. Conclusion and application of results: National actors suggest the effective promotion of the sector from the authority. Creating an approved laboratory and the establishment of specific legislation are expected to refocus the wine sector. Keywords: grape variety, chaptalization, sulfur dioxide, quality control, malagasy wine, region of Haute Matsiatra, Fianarantsoa - Madagascar

Contrôle qualité de la production de vins tropicaux malgaches en provenance de la région de Haute Matsiatra, au sud de Madagascar