{"id":32736,"date":"2021-04-15T09:55:20","date_gmt":"2021-04-15T07:55:20","guid":{"rendered":"https:\/\/gjkkadksm.preview.infomaniak.website\/?post_type=resume-foret-mail&#038;p=32736"},"modified":"2021-04-15T10:10:01","modified_gmt":"2021-04-15T08:10:01","slug":"qui-fait-jaunir-les-melezes-avant-lautomne","status":"publish","type":"resume-foret-mail","link":"https:\/\/foretnature.be\/en\/resume-foret-mail\/qui-fait-jaunir-les-melezes-avant-lautomne\/","title":{"rendered":"Qui fait jaunir les m\u00e9l\u00e8zes avant l\u2019automne ?"},"content":{"rendered":"<p class=\"text-build-content\" data-testid=\"6V_i7jTBTV\">Juillet 2020, la Suisse enregistre de nombreux signalements de m\u00e9l\u00e8zes dont les aiguilles d\u00e9p\u00e9rissent. Sur le rang des accus\u00e9s : des champignons, des pucerons, les gel\u00e9es tardives et la s\u00e9cheresse.<\/p>\n<p class=\"text-build-content\" data-testid=\"6V_i7jTBTV\">Le champignon Meria laricis a \u00e9t\u00e9 le premier suspect. Mais ce n\u2019est pas lui qui a \u00e9t\u00e9 retrouv\u00e9 dans les aiguilles des m\u00e9l\u00e8zes atteints. Un autre champignon a \u00e9t\u00e9 isol\u00e9 : Sydowia polyspora. Dans la majorit\u00e9 des cas cependant, il n\u2019est pas la cause directe du d\u00e9p\u00e9rissement, mais un parasite de faiblesse, responsable de la mort des aiguilles de l\u2019ann\u00e9e. Un autre champignon : \u00a0Hypodermella laricis. Il peut infecter les aiguilles lors des pluies printani\u00e8res.<\/p>\n<p class=\"text-build-content\" data-testid=\"6V_i7jTBTV\">Les m\u00e9l\u00e8zes ont \u00e9galement \u00e9t\u00e9 attaqu\u00e9s en 2020 par le puceron des aiguilles du m\u00e9l\u00e8ze (Aldelges geniculatus). La succion endommage les aiguilles, qui jaunissent puis tombent, mais \u00e9galement les bourgeons, qui donneront des rameaux mal form\u00e9s. Cette esp\u00e8ce de puceron est souvent pr\u00e9sente en forte densit\u00e9 sur plusieurs ann\u00e9es.<\/p>\n<p class=\"text-build-content\" data-testid=\"6V_i7jTBTV\">Le m\u00e9l\u00e8ze est \u00e9galement sensible aux gel\u00e9es tardives : les longues pousses sont touch\u00e9es juste apr\u00e8s le d\u00e9bourrement. Et finalement, le m\u00e9l\u00e8ze est impact\u00e9 par le stress hydrique provoqu\u00e9 par les s\u00e9cheresses. L\u2019arbre affaibli devient sensible aux parasites secondaires.<\/p>","protected":false},"excerpt":{"rendered":"<p>Juillet 2020, la Suisse enregistre de nombreux signalements de m\u00e9l\u00e8zes dont les aiguilles d\u00e9p\u00e9rissent. Sur le rang des accus\u00e9s : des champignons, des pucerons, les gel\u00e9es tardives et la s\u00e9cheresse. Le champignon Meria laricis a \u00e9t\u00e9 le premier suspect. Mais ce n\u2019est pas lui qui a \u00e9t\u00e9 retrouv\u00e9 dans les aiguilles des m\u00e9l\u00e8zes atteints. Un [&hellip;]<\/p>","protected":false},"featured_media":0,"template":"","categories":[50],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Qui fait jaunir les m\u00e9l\u00e8zes avant l\u2019automne ? - 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\/resume-foret-mail\/qui-fait-jaunir-les-melezes-avant-lautomne\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Qui fait jaunir les m\u00e9l\u00e8zes avant l\u2019automne ? - For\u00eat.Nature\" \/>\n<meta property=\"og:description\" content=\"Juillet 2020, la Suisse enregistre de nombreux signalements de m\u00e9l\u00e8zes dont les aiguilles d\u00e9p\u00e9rissent. Sur le rang des accus\u00e9s : des champignons, des pucerons, les gel\u00e9es tardives et la s\u00e9cheresse. Le champignon Meria laricis a \u00e9t\u00e9 le premier suspect. Mais ce n\u2019est pas lui qui a \u00e9t\u00e9 retrouv\u00e9 dans les aiguilles des m\u00e9l\u00e8zes atteints. 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Sur le rang des accus\u00e9s : des champignons, des pucerons, les gel\u00e9es tardives et la s\u00e9cheresse. Le champignon Meria laricis a \u00e9t\u00e9 le premier suspect. Mais ce n\u2019est pas lui qui a \u00e9t\u00e9 retrouv\u00e9 dans les aiguilles des m\u00e9l\u00e8zes atteints. 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