{"id":709,"date":"2007-07-05T08:52:04","date_gmt":"2007-07-05T08:52:04","guid":{"rendered":"http:\/\/blogs.thesocialmedia.com\/leblogjardin\/2007\/07\/05\/maladie-du-rosi\/"},"modified":"2012-08-27T10:06:02","modified_gmt":"2012-08-27T10:06:02","slug":"maladie-du-rosi","status":"publish","type":"post","link":"https:\/\/blogs.thesocialmedia.com\/leblogjardin\/2007\/07\/05\/maladie-du-rosi\/","title":{"rendered":"Maladie du rosier: le marsonia"},"content":{"rendered":"<p><a href=\"http:\/\/blogs.thesocialmedia.com\/leblogjardin\/files\/2012\/08\/marsonia.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"280\" height=\"210\"  alt=\"Marsonia\" src=\"http:\/\/www.leblogjardin.com\/images\/2007\/07\/04\/marsonia.jpg\" style=\"margin: 0px 5px 5px 0px;float: left\" \/><\/a> Vos rosiers sont ne sont pas tr\u00e9s beaux cette ann\u00e9e et vous vous d\u00e9solez de les voir un peu d\u00e9nud\u00e9s avec sur les feuilles restantes de <a href=\"http:\/\/www.gerbeaud.com\/jardin\/fiches\/fp_rosiers_maladies_courantes.php3\">vilaines taches<\/a> brunes? C&rsquo;est un sympt\u00f4me qui est fr\u00e9quent et qui ne trompe pas mais il donne au rosier un air ch\u00e9tif et maladif que nous n&rsquo;aimons pas voir. En ce moment les rosiers sont en fleurs et si <a href=\"http:\/\/jardinet.chez-alice.fr\/p1015001.htm\">la maladie<\/a> les frappe, la floraison est fortement compromise.<br \/>N&rsquo;attendez pas pour agir, il vaut mieux m\u00eame le faire pr\u00e9ventivement chaque ann\u00e9e d\u00e9s l&rsquo;arriv\u00e9e des beaux jours plut\u00f4t que d&rsquo;attendre que la plante souffre.<\/p>\n<p>L&rsquo;apparition de taches brunes et rondes sur les feuilles est d\u00fbe \u00e0 un champignon: <a href=\"http:\/\/www.journaldujardin.com\/article.cfm?id=102068\">le marsonia.<\/a><br \/>Une attaque importante de cette maladie entraine le jaunissement puis la chute des feuilles et votre rosier risque de se retrouver bien d\u00e9garni! Il va ensuite devoir reconstituer son feuillage et va y concentrer toute son \u00e9nergie, pendant ce temps, il ne fera pas de boutons floraux. Dommage, un rosier d\u00e9feuill\u00e9 et sans fleurs en \u00e9t\u00e9, c&rsquo;est bien triste.<br \/>Ce champignon apparait par temps doux et humide, il arrive en g\u00e9n\u00e9ral au printemps et fatigue la plante si on n&rsquo;intervient pas.<br \/>Coupez les branches les plus atteintes, celles qui commencent \u00e0 s\u00e9cher, br\u00fblez-les pour \u00e9viter toute propagation du champignon. Traitez sans attendre avec un fongicide, il existe des produits bio tr\u00e9s efficaces qui ne sont pas nocifs pour l&rsquo;environnement.<\/p>\n<p>A titre pr\u00e9ventif utilisez de la bouillie bordelaise et ramass\u00e9z les feuilles tomb\u00e9es en automne car le champignon s&rsquo;y d\u00e9veloppe.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Vos rosiers sont ne sont pas tr\u00e9s beaux cette ann\u00e9e et vous vous d\u00e9solez de les voir un peu d\u00e9nud\u00e9s avec sur les feuilles restantes de vilaines taches brunes? C&rsquo;est un sympt\u00f4me qui est fr\u00e9quent et qui ne trompe pas mais il donne au rosier un air ch\u00e9tif et maladif que nous n&rsquo;aimons pas voir. [&hellip;]<\/p>\n","protected":false},"author":354,"featured_media":3312,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11,29,28],"tags":[],"class_list":["post-709","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ennemis-et-maladies","category-rosiers","category-traitements"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Maladie du rosier: le marsonia - Le blog jardin<\/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:\/\/blogs.thesocialmedia.com\/leblogjardin\/2007\/07\/05\/maladie-du-rosi\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Maladie du rosier: le marsonia - Le blog jardin\" \/>\n<meta property=\"og:description\" content=\"Vos rosiers sont ne sont pas tr\u00e9s beaux cette ann\u00e9e et vous vous d\u00e9solez de les voir un peu d\u00e9nud\u00e9s avec sur les feuilles restantes de vilaines taches brunes? 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