Le 01/11/1995, 00:00:00 > Articles

Eutypiose et nécrose bactérienne : casse-tête sur les bois.

Les maladies du bois deviendraient-elles l’ennemis n°1 des vignes? Cette affimation est à nuancer: les ennemis du feuillage et de la grappe feraient d’énormes dégâts si on ne savait les prévoir et les combattre.Mais justement, on sait le faire. Et les maladies du bois, plus sournoises, capricieuses et difficiles à maîtriser, prennent la vedette dans bien des vignobles. C’est le cas de l’Eutypiose mais aussi de la nécrose bactérienne (Xylophilus ampelinus) connu comme Maladie d’Oléron… Eutypa canker caused by Eutypa lata fungus affects the entire French wine-growing area and bacterial Necrosis bacterial Necrosis caused by Xylophilus ampelinus is rearing its head again in the Charente region. There have also been outbreaks in other regions. Amongst the different disease control methods, some are effective against both diseases (cleaning of plots, burning of vinestock and pruning debris) and others are more specific (fungicide application on pruning wounds against Eutypa canker, copper treatments against Necrosis). Then there are those which are completely contradictory (late pruning and cutting back against Eutypa canker, early pruning against Necrosis). In sectors affected by both diseases, protection against Necrosis is favoured (early pruning, copper) as well as the treatment of pruning wounds against Eutypa canker in young vines.

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Auteurs:

• M. Decoin

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