{"id":44254,"date":"2024-10-23T16:41:49","date_gmt":"2024-10-23T14:41:49","guid":{"rendered":"https:\/\/foretnature.be\/?post_type=article-foret-nature&#038;p=44254"},"modified":"2024-10-23T16:41:49","modified_gmt":"2024-10-23T14:41:49","slug":"le-role-du-climat-sur-les-epidemies-de-scolytes-sur-le-hetre","status":"publish","type":"article-foret-nature","link":"https:\/\/foretnature.be\/en\/article-foret-nature\/le-role-du-climat-sur-les-epidemies-de-scolytes-sur-le-hetre\/","title":{"rendered":"Le r\u00f4le du climat sur les \u00e9pid\u00e9mies de scolytes sur le h\u00eatre"},"content":{"rendered":"<p>Suite au ph\u00e9nom\u00e8ne appel\u00e9 commun\u00e9ment la \u00ab maladie du h\u00eatre \u00bb qui a commenc\u00e9 au d\u00e9but des ann\u00e9es 2000, une vaste \u00e9tude sur le h\u00eatre et le climat a vu le jour en Wallonie. Cette \u00e9tude vise \u00e0 \u00e9valuer exp\u00e9rimentalement l\u2019impact des froids extr\u00eames et de la s\u00e8cheresse sur l\u2019\u00e9tat sanitaire du h\u00eatre. Le d\u00e9clin des h\u00eatraies ardennaises a \u00e9t\u00e9 associ\u00e9 \u00e0 des \u00e9pid\u00e9mies de scolytes secondaires sur des arbres vivants. Les insectes qui colonisent les arbres sont qualifi\u00e9s de secondaires, c\u2019est-\u00e0-dire th\u00e9oriquement incapables d\u2019attaquer avec succ\u00e8s des arbres sains. Le d\u00e9clin qui a commenc\u00e9 au d\u00e9but des ann\u00e9es 2000 peut \u00eatre d\u00e9compos\u00e9 en trois phases distinctes caract\u00e9ris\u00e9es par des galeries d\u2019insectes commen\u00e7ant ou non sur des n\u00e9croses pr\u00e9sentes sur le bois. Dans tous les cas (phases 1, 2 et 3), les galeries s\u2019\u00e9tendent dans le bois apparemment sain sous-jacent, ce qui soul\u00e8ve des questions quant au caract\u00e8re strictement secondaires des insectes. Diff\u00e9rents types de stress climatiques (gel, s\u00e9cheresse, exc\u00e8s d\u2019eau) ont \u00e9t\u00e9 \u00e9tudi\u00e9s de mani\u00e8re exp\u00e9rimentale dans le cadre de la recherche. Leur impact sur la sensibilit\u00e9 des arbres aux attaques de scolytes secondaires a \u00e9t\u00e9 mesur\u00e9. Gr\u00e2ce aux r\u00e9sultats pr\u00e9sent\u00e9s dans l\u2019article, une explication de l\u2019origine des ph\u00e9nom\u00e8nes de d\u00e9clin soudain du h\u00eatre est propos\u00e9e. La phase 1 est certainement li\u00e9e \u00e0 une vague de froid, la phase 2 est possiblement li\u00e9e \u00e0 un exc\u00e8s de pr\u00e9cipitation et l\u2019origine de la phase 3 n\u2019est pas encore expliqu\u00e9e. En conclusion, les auteurs mettent le doigt sur la base du probl\u00e8me, \u00e0 savoir la sensibilit\u00e9 des arbres aux extr\u00eames climatiques. Il convient donc de prendre en compte les nombreux facteurs pouvant pr\u00e9disposer les arbres aux contraintes climatiques (\u00e2ge trop avanc\u00e9, inad\u00e9quations stationnelles\u2026). [C.S.]<\/p>","protected":false},"excerpt":{"rendered":"<p>Suite au ph\u00e9nom\u00e8ne appel\u00e9 commun\u00e9ment la \u00ab maladie du h\u00eatre \u00bb qui a commenc\u00e9 au d\u00e9but des ann\u00e9es 2000, une vaste \u00e9tude sur le h\u00eatre et le climat a vu le jour en Wallonie. Cette \u00e9tude vise \u00e0 \u00e9valuer exp\u00e9rimentalement l\u2019impact des froids extr\u00eames et de la s\u00e8cheresse sur l\u2019\u00e9tat sanitaire du h\u00eatre. Le d\u00e9clin [&hellip;]<\/p>","protected":false},"featured_media":0,"template":"","categories":[49],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Le r\u00f4le du climat sur les \u00e9pid\u00e9mies de scolytes sur le h\u00eatre - For\u00eat.Nature<\/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:\/\/foretnature.be\/en\/article-foret-nature\/le-role-du-climat-sur-les-epidemies-de-scolytes-sur-le-hetre\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Le r\u00f4le du climat sur les \u00e9pid\u00e9mies de scolytes sur le h\u00eatre - For\u00eat.Nature\" \/>\n<meta property=\"og:description\" content=\"Suite au ph\u00e9nom\u00e8ne appel\u00e9 commun\u00e9ment la \u00ab maladie du h\u00eatre \u00bb qui a commenc\u00e9 au d\u00e9but des ann\u00e9es 2000, une vaste \u00e9tude sur le h\u00eatre et le climat a vu le jour en Wallonie. Cette \u00e9tude vise \u00e0 \u00e9valuer exp\u00e9rimentalement l\u2019impact des froids extr\u00eames et de la s\u00e8cheresse sur l\u2019\u00e9tat sanitaire du h\u00eatre. 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