{"id":1469,"date":"2005-04-18T20:43:00","date_gmt":"2005-04-18T20:43:00","guid":{"rendered":"http:\/\/blogs.thesocialmedia.com\/leblogjardin\/2005\/04\/18\/les-maladies-de-2\/"},"modified":"2012-08-27T09:42:55","modified_gmt":"2012-08-27T09:42:55","slug":"les-maladies-de-2","status":"publish","type":"post","link":"https:\/\/blogs.thesocialmedia.com\/leblogjardin\/2005\/04\/18\/les-maladies-de-2\/","title":{"rendered":"Les maladies des rosiers"},"content":{"rendered":"

\"Roses1\"<\/a> Quelques jours de soleil suivis de quelques jours de pluie, une v\u00e9g\u00e9tation qui s’emballe, et voil\u00e0 , il n’en faut pas plus pour que nos rosiers pr\u00e9f\u00e9r\u00e9s subissent leurs premi\u00e8res attaques; <\/p>\n

Tout d’abord, celles des maladies cryptogamiques<\/a> (comprenez champignon), en t\u00eate desquelles l’o\u00efdium<\/a>, maladie du blanc, d\u00fbe \u00e0 une trop grande s\u00e9cheresse au niveau des racines ou une trop forte humidit\u00e9 du feuillage; \u00e7a se manifeste par l’apparition d’un feutrage blanc sur les feuilles, les tiges et les boutons floraux; Pulv\u00e9risez la plante avec un fongicide \u00e0 base de souffre ou de triforine, et br\u00fblez toutes les feuilles malades tomb\u00e9es au sol.<\/p>\n

La maladie des taches noires<\/a> provoqu\u00e9e par un champignon, le marssonina rosae; les feuilles se couvrent de taches d’ "encre" violac\u00e9es; coupez et br\u00fblez toutes les parties atteintes et pulv\u00e9risez un fongicide.<\/p>\n

La maladie de la rouille<\/a> qui laisse appara\u00eetre sur le dessus des feuilles des taches et des pustules rouges orang\u00e9es. Ramassez et br\u00fblez les feuilles et traitez comme pr\u00e9c\u00e9demment.<\/p>\n

Les rosiers subissent \u00e9galement les premi\u00e8res attaques d’insectes; en ce moment c’est surtout l’attaque d’une petite chenille, la tenthr\u00e8de<\/a>, qui d\u00e9vore les feuilles des rosiers; traitez avec un insecticide \u00e0 base de pyr\u00e9thrine ou rot\u00e9none.<\/p>\n

Attaques de pucerons, peu dangereux, mais qui finissent par affaiblir le rosier; le miellat qu’ils d\u00e9posent attire les fourmis qui envahissent la plante. Un champignon noir appel\u00e9 "fumagine" se d\u00e9veloppe alors sur le rosier attaqu\u00e9; traitez en amont en \u00e9liminant les pucerons<\/a>.<\/p>\n

D\u00e8s le mois de mai, un petit insecte appel\u00e9 capside, perfore, entre autres, les feuilles des rosiers d’une multitude de petits trous; traitez rapidement avec un insecticide \u00e0 base de cyperm\u00e9thrine.<\/p><\/p>\n","protected":false},"excerpt":{"rendered":"

Quelques jours de soleil suivis de quelques jours de pluie, une v\u00e9g\u00e9tation qui s’emballe, et voil\u00e0 , il n’en faut pas plus pour que nos rosiers pr\u00e9f\u00e9r\u00e9s subissent leurs premi\u00e8res attaques; Tout d’abord, celles des maladies cryptogamiques (comprenez champignon), en t\u00eate desquelles l’o\u00efdium, maladie du blanc, d\u00fbe \u00e0 une trop grande s\u00e9cheresse au niveau des […]<\/p>\n","protected":false},"author":358,"featured_media":1801,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[29],"tags":[],"class_list":["post-1469","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-rosiers"],"yoast_head":"\nLes maladies des rosiers - 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\/2005\/04\/18\/les-maladies-de-2\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Les maladies des rosiers - Le blog jardin\" \/>\n<meta property=\"og:description\" content=\"Quelques jours de soleil suivis de quelques jours de pluie, une v\u00e9g\u00e9tation qui s’emballe, et voil\u00e0 , il n’en faut pas plus pour que nos rosiers pr\u00e9f\u00e9r\u00e9s subissent leurs premi\u00e8res attaques; Tout d’abord, celles des maladies cryptogamiques (comprenez champignon), en t\u00eate desquelles l’o\u00efdium, maladie du blanc, d\u00fbe \u00e0 une trop grande s\u00e9cheresse au niveau des […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/blogs.thesocialmedia.com\/leblogjardin\/2005\/04\/18\/les-maladies-de-2\/\" \/>\n<meta property=\"og:site_name\" content=\"Le blog jardin\" \/>\n<meta property=\"article:published_time\" content=\"2005-04-18T20:43:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2012-08-27T09:42:55+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/blogs.thesocialmedia.com\/leblogjardin\/files\/2012\/08\/roses1.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"300\" \/>\n\t<meta property=\"og:image:height\" content=\"310\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"christine pomart\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"christine pomart\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/blogs.thesocialmedia.com\/leblogjardin\/2005\/04\/18\/les-maladies-de-2\/\",\"url\":\"https:\/\/blogs.thesocialmedia.com\/leblogjardin\/2005\/04\/18\/les-maladies-de-2\/\",\"name\":\"Les maladies des rosiers - 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