{"id":93726,"date":"2016-09-16T08:44:51","date_gmt":"2016-09-16T06:44:51","guid":{"rendered":"http:\/\/batijournal.com\/?p=93726"},"modified":"2019-07-15T12:23:39","modified_gmt":"2019-07-15T10:23:39","slug":"5-forets-fermees-raison-deperissement-frenes","status":"publish","type":"post","link":"https:\/\/batijournal.com\/index.php\/5-forets-fermees-raison-deperissement-frenes\/93726\/","title":{"rendered":"5 for\u00eats ferm\u00e9es en raison du d\u00e9p\u00e9rissement des fr\u00eanes"},"content":{"rendered":"<p>Le fr\u00eane est actuellement victime d\u2019une maladie provoqu\u00e9e par un champignon parasitaire d\u00e9nomm\u00e9 \u00abchalarose\u00bb. Arriv\u00e9e il y a moins de 10 ans en provenance d\u2019Europe orientale, cette maladie entra\u00eene un d\u00e9p\u00e9rissement rapide des arbres avec des risques de chute de branches et de rupture. Le d\u00e9p\u00e9rissement avanc\u00e9 constat\u00e9 dans certains massifs forestiers \u00e0 forte densit\u00e9 de fr\u00eanes a conduit l\u2019ONF, en tant que gestionnaire des for\u00eats publiques, \u00e0 fermer au public \u00e0 compter du 15 septembre 2016 quatre for\u00eats domaniales du Pas-de-Calais (Boulogne, Desvres, Hardelot et Vimy) et une for\u00eat domaniale du Nord (Nieppe). Cette fermeture durera quelques mois. Elle vise \u00e0 pr\u00e9venir tout risque d\u2019accident dans l\u2019attente de la s\u00e9curisation par les \u00e9quipes de l\u2019ONF des 350 km d\u2019itin\u00e9raires de randonn\u00e9e de ces for\u00eats.<\/p>\n<h2>Un champignon qui p\u00e9n\u00e8tre par les feuillles<\/h2>\n<p>La chalarose est v\u00e9hicul\u00e9e par un champignon de quelques millim\u00e8tres qui p\u00e9n\u00e8tre par les feuilles, provoque leur fl\u00e9trissement et passe ensuite dans les branches. Lorsqu\u2019ils sont touch\u00e9s, les fr\u00eanes utilisent leurs r\u00e9serves pendant plusieurs ann\u00e9es pour reconstituer tant bien que mal leur feuillage, mais cela les fragilise \u00e9norm\u00e9ment. Le champignon en profite pour infecter le pied des arbres en s&rsquo;insinuant dans les fissures de l&rsquo;\u00e9corce. L&rsquo;infection se traduit par des n\u00e9croses qui fragilisent le syst\u00e8me racinaire et perturbent la circulation de la s\u00e8ve allant jusqu&rsquo;\u00e0 l&rsquo;interrompre compl\u00e8tement, ce qui provoque la mort de l\u2019arbre au bout de quelques ann\u00e9es. Le processus s\u2019accompagne souvent de l&rsquo;apparition de pathog\u00e8nes dits \u00absecondaires\u00bb, champignons ou insectes qui pondent sous l&rsquo;\u00e9corce et dont les larves creusent d&rsquo;innombrables galeries, acc\u00e9l\u00e9rant le dess\u00e8chement des arbres.<\/p>\n<p>Photo : ONF<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Le fr\u00eane est actuellement victime d\u2019une maladie provoqu\u00e9e par un champignon parasitaire d\u00e9nomm\u00e9 \u00abchalarose\u00bb. Arriv\u00e9e il y a moins de 10 ans en provenance d\u2019Europe orientale, cette maladie entra\u00eene un d\u00e9p\u00e9rissement rapide des arbres avec des risques de chute de branches et de rupture. Le d\u00e9p\u00e9rissement avanc\u00e9 constat\u00e9 dans certains massifs forestiers \u00e0 forte densit\u00e9 [&hellip;]<\/p>\n","protected":false},"author":17,"featured_media":93727,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[6351],"tags":[1017,772],"class_list":["post-93726","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-energie-environnement","tag-filiere-bois","tag-foret"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>5 for\u00eats ferm\u00e9es en raison du d\u00e9p\u00e9rissement des fr\u00eanes<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/batijournal.com\/index.php\/5-forets-fermees-raison-deperissement-frenes\/93726\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"5 for\u00eats ferm\u00e9es en raison du d\u00e9p\u00e9rissement des fr\u00eanes\" \/>\n<meta property=\"og:description\" content=\"Le fr\u00eane est actuellement victime d\u2019une maladie provoqu\u00e9e par un champignon parasitaire d\u00e9nomm\u00e9 \u00abchalarose\u00bb. Arriv\u00e9e il y a moins de 10 ans en provenance d\u2019Europe orientale, cette maladie entra\u00eene un d\u00e9p\u00e9rissement rapide des arbres avec des risques de chute de branches et de rupture. 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