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24, chemin de Borde Rouge –Auzeville – CS52627
31326 Castanet Tolosan CEDEX - France

Dernière mise à jour : Mai 2018

Menu Logo Principal ministère de l'Agriculture (DGER) CNIV Bordeaux Sciences Agro Université Champagne-Ardenne IFV ISVV

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Lecomte P, Diarra B, Bastien S, Chevrier C (2017)

Dépérissement de la vigne. Confirmation du rôle de la conduite de la vigne (et de la taille) sur le développement de l’Esca. Union Girondine, avril, 46-49


Les résultats montrent que les ceps conduits en lyre et en cordon sont souvent moins impactés par les maladies du bois que ceux conduits en guyot, de même que les formes guyot avec des bras bien formés et longs sont moins impactées que les formes guyot avec des bras courts ou absents. Ce qui confirme largement des observations antérieures indiquant l’intérêt des formes avec des bras longs (Lecomte et al., 2008, 2012).

Mais des choix de taille non judicieux par rapport aux trajets de sève déjà en place, avec des inversions de trajets de sève ou des grosses plaies de taille ou des tailles rases, peuvent favoriser de façon exagérée le développement de cônes de dessèchement et accélérer le processus de dépérissement.

La qualité de la taille joue donc également un rôle très important. En effet, le bénéfice d’un mode de conduite bien structuré ne sera avantageux que si la taille est respectueuse des trajets de sève et si on évite les grosses plaies de tailles au niveau des bois de charpente (tronc et bras).

Aujourd'hui ces résultats sont largement validés par les observations effectuées dans d'autres régions françaises dans le cadre de cette action soutenue par le Casdar et le Cniv.