{"id":26785,"date":"2025-07-24T15:17:18","date_gmt":"2025-07-24T13:17:18","guid":{"rendered":"https:\/\/www.irbab-kbivb.be\/?p=26785"},"modified":"2025-07-24T15:17:20","modified_gmt":"2025-07-24T13:17:20","slug":"maladies-foliaires-la-cercosporiose-progresse-lentement-mais-surement-la-rouille-gagne-aussi-du-terrain","status":"publish","type":"post","link":"https:\/\/www.irbab-kbivb.be\/fr\/maladies-foliaires-la-cercosporiose-progresse-lentement-mais-surement-la-rouille-gagne-aussi-du-terrain\/","title":{"rendered":"Maladies foliaires : La cercosporiose progresse lentement mais s\u00fbrement, la rouille gagne aussi du terrain"},"content":{"rendered":"\n<p><a href=\"https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/07\/24-07-2025-FR.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"rounded aligncenter wp-image-26786 size-large\" src=\"https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/07\/24-07-2025-FR-1024x643.jpg\" alt=\"\" width=\"810\" height=\"509\" srcset=\"https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/07\/24-07-2025-FR-1024x643.jpg 1024w, https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/07\/24-07-2025-FR-300x188.jpg 300w, https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/07\/24-07-2025-FR-768x482.jpg 768w, https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/07\/24-07-2025-FR-810x508.jpg 810w, https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/07\/24-07-2025-FR-1140x715.jpg 1140w, https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/07\/24-07-2025-FR.jpg 1192w\" sizes=\"auto, (max-width: 810px) 100vw, 810px\" \/><\/a>Via la <a href=\"https:\/\/www.google.com\/maps\/d\/edit?mid=1d0AGa618B_fIkArWT4lvEqf6n7fyRSk&amp;usp=sharing\">Carte Betteraves Maladies Foliaires<\/a>, vous acc\u00e9dez directement \u00e0 la situation des diff\u00e9rentes maladies foliaires \u00e0 travers le pays. L\u2019\u00e9tat de la culture de chicor\u00e9e peut \u00eatre consult\u00e9 via la <a href=\"https:\/\/www.google.com\/maps\/d\/edit?mid=1gDasUv8UBjimqhaafkEO99b3c6RSnsg&amp;usp=sharing\">Carte Chicor\u00e9e<\/a>.<\/p>\n<p>Les observations de cette semaine montrent que des sympt\u00f4mes de maladies foliaires ont \u00e9t\u00e9 observ\u00e9s dans plus de 85% des parcelles de betteraves sucri\u00e8res. C\u2019est principalement de la cercosporiose qui est observ\u00e9e. Quatre champs dans la r\u00e9gion du Hainaut et dans le sud de la Flandre orientale et occidentale ont d\u00e9j\u00e0 atteint le deuxi\u00e8me seuil de traitement. Cependant, dans la majorit\u00e9 des champs, le d\u00e9veloppement de la cercosporiose semble rester assez limit\u00e9. Dans les champs qui ont d\u00e9j\u00e0 \u00e9t\u00e9 trait\u00e9s une fois, l&#8217;infestation semble \u00eatre sous contr\u00f4le pour le moment.<\/p>\n<p>N\u00e9anmoins, le temps changeant avec des averses r\u00e9guli\u00e8res pourrait bien favoriser le risque de nouvelles infections. Le message reste donc de continuer \u00e0 surveiller les parcelles en observant chaque semaine les feuilles \u00e0 la recherche de sympt\u00f4mes de maladies foliaires, au plus tard trois semaines apr\u00e8s un traitement. Apr\u00e8s avoir d\u00e9pass\u00e9 le premier seuil et effectu\u00e9 un traitement, une deuxi\u00e8me pulv\u00e9risation est recommand\u00e9e uniquement lorsque le seuil de pulv\u00e9risation de 5 feuilles affect\u00e9es sur 100 est atteint pour la cercosporiose.<\/p>\n<p>Lors d&#8217;un traitement fongicide, il faut veiller \u00e0 alterner et \u00e0 m\u00e9langer les mati\u00e8res actives afin de maximiser leur efficacit\u00e9 et de les maintenir. <strong>Si le prothioconazole a \u00e9t\u00e9 appliqu\u00e9 lors du premier traitement, il est recommand\u00e9 d&#8217;utiliser d&#8217;autres mati\u00e8res actives lors du second traitement.<\/strong><\/p>\n<table>\n<tbody>\n<tr>\n<td width=\"151\">\n<p><strong>Maladie<\/strong><\/p>\n<\/td>\n<td width=\"151\">\n<p><strong>1er seuil de traitement<\/strong><\/p>\n<\/td>\n<td width=\"151\">\n<p><strong>2\u00e8me seuil de traitement<\/strong><\/p>\n<\/td>\n<\/tr>\n<tr>\n<td width=\"151\">\n<p><em>Cercosporiose<\/em><\/p>\n<\/td>\n<td width=\"151\">\n<p>Premiers sympt\u00f4mes<\/p>\n<\/td>\n<td width=\"151\">\n<p>5% des feuilles atteintes<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td width=\"151\">\n<p><em>Ramulariose<\/em><\/p>\n<\/td>\n<td width=\"151\">\n<p>5% des feuilles atteintes<\/p>\n<\/td>\n<td width=\"151\">\n<p>\u00a0<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td width=\"151\">\n<p>O\u00efdium, rouille<\/p>\n<\/td>\n<td width=\"151\">\n<p>15% des feuilles atteintes<\/p>\n<\/td>\n<td width=\"151\">\n<p>\u00a0<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Outre la cercosporiose, des sympt\u00f4mes de rouille se sont propag\u00e9s la semaine derni\u00e8re. Ainsi, cette maladie a \u00e9t\u00e9 observ\u00e9e dans 35% des champs de la carte. Le seuil de nuisibilit\u00e9 a \u00e9t\u00e9 d\u00e9pass\u00e9 dans cinq champs, principalement en Flandre (2 dans le Pajottenland, 2 dans les Ardennes flamandes et 1 parcelle sur la c\u00f4te. La vigilance reste donc de mise pour cette maladie \u00e9galement. Enfin, de l\u2019o\u00efdium (le seuil a \u00e9t\u00e9 d\u00e9pass\u00e9 dans un champ) et de la ramulariose ont \u00e9galement \u00e9t\u00e9 observ\u00e9s.<\/p>\n<p>Vous trouverez les seuils de nuisibilit\u00e9 et les produits recommand\u00e9s dans le <a href=\"https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/07\/BT-25.06-Fongimemo-FR.pdf\">Fongi Memo.<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Via la Carte Betteraves Maladies Foliaires, vous acc\u00e9dez directement \u00e0 la situation des diff\u00e9rentes maladies foliaires \u00e0 travers le pays. L\u2019\u00e9tat de la culture de chicor\u00e9e peut \u00eatre consult\u00e9 via la Carte Chicor\u00e9e. Les observations de cette semaine montrent que des sympt\u00f4mes de maladies foliaires ont \u00e9t\u00e9 observ\u00e9s dans plus de 85% des parcelles de [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":26788,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"iawp_total_views":2,"footnotes":""},"categories":[2,221,129],"tags":[243],"class_list":["post-26785","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-betterave","category-maladies-foliaires","category-protection-des-plantes","tag-messages"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Maladies foliaires : La cercosporiose progresse lentement mais s\u00fbrement, la rouille gagne aussi du terrain - IRBAB-KBIVB<\/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:\/\/www.irbab-kbivb.be\/fr\/maladies-foliaires-la-cercosporiose-progresse-lentement-mais-surement-la-rouille-gagne-aussi-du-terrain\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Maladies foliaires : La cercosporiose progresse lentement mais s\u00fbrement, la rouille gagne aussi du terrain - IRBAB-KBIVB\" \/>\n<meta property=\"og:description\" content=\"Via la Carte Betteraves Maladies Foliaires, vous acc\u00e9dez directement \u00e0 la situation des diff\u00e9rentes maladies foliaires \u00e0 travers le pays. 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Les observations de cette semaine montrent que des sympt\u00f4mes de maladies foliaires ont \u00e9t\u00e9 observ\u00e9s dans plus de 85% des parcelles de [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.irbab-kbivb.be\/fr\/maladies-foliaires-la-cercosporiose-progresse-lentement-mais-surement-la-rouille-gagne-aussi-du-terrain\/\" \/>\n<meta property=\"og:site_name\" content=\"IRBAB-KBIVB\" \/>\n<meta property=\"article:published_time\" content=\"2025-07-24T13:17:18+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-07-24T13:17:20+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2025\/07\/24-07-2025-FR-1.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1192\" \/>\n\t<meta property=\"og:image:height\" content=\"748\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Marion\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"Marion\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.irbab-kbivb.be\\\/fr\\\/maladies-foliaires-la-cercosporiose-progresse-lentement-mais-surement-la-rouille-gagne-aussi-du-terrain\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.irbab-kbivb.be\\\/fr\\\/maladies-foliaires-la-cercosporiose-progresse-lentement-mais-surement-la-rouille-gagne-aussi-du-terrain\\\/\"},\"author\":{\"name\":\"Marion\",\"@id\":\"https:\\\/\\\/www.irbab-kbivb.be\\\/#\\\/schema\\\/person\\\/dad6fe34d3ac93cce3720797f132a2e5\"},\"headline\":\"Maladies foliaires : La cercosporiose progresse lentement mais s\u00fbrement, la rouille gagne aussi du terrain\",\"datePublished\":\"2025-07-24T13:17:18+00:00\",\"dateModified\":\"2025-07-24T13:17:20+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.irbab-kbivb.be\\\/fr\\\/maladies-foliaires-la-cercosporiose-progresse-lentement-mais-surement-la-rouille-gagne-aussi-du-terrain\\\/\"},\"wordCount\":416,\"image\":{\"@id\":\"https:\\\/\\\/www.irbab-kbivb.be\\\/fr\\\/maladies-foliaires-la-cercosporiose-progresse-lentement-mais-surement-la-rouille-gagne-aussi-du-terrain\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.irbab-kbivb.be\\\/wp-content\\\/uploads\\\/2025\\\/07\\\/24-07-2025-FR-1.jpg\",\"keywords\":[\"Messages\"],\"articleSection\":[\"Betterave\",\"Maladies foliaires\",\"Protection des plantes\"],\"inLanguage\":\"fr-FR\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.irbab-kbivb.be\\\/fr\\\/maladies-foliaires-la-cercosporiose-progresse-lentement-mais-surement-la-rouille-gagne-aussi-du-terrain\\\/\",\"url\":\"https:\\\/\\\/www.irbab-kbivb.be\\\/fr\\\/maladies-foliaires-la-cercosporiose-progresse-lentement-mais-surement-la-rouille-gagne-aussi-du-terrain\\\/\",\"name\":\"Maladies foliaires : La cercosporiose progresse lentement mais s\u00fbrement, la rouille gagne aussi du terrain - 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