{"id":28588,"date":"2026-08-27T14:56:52","date_gmt":"2026-08-27T12:56:52","guid":{"rendered":"https:\/\/www.irbab-kbivb.be\/?p=28588"},"modified":"2026-08-28T13:59:16","modified_gmt":"2026-08-28T11:59:16","slug":"27-aout-maladies-foliaires-la-pression-des-maladies-letat-du-feuillage-et-la-date-darrachage-determinent-la-strategie","status":"publish","type":"post","link":"https:\/\/www.irbab-kbivb.be\/fr\/27-aout-maladies-foliaires-la-pression-des-maladies-letat-du-feuillage-et-la-date-darrachage-determinent-la-strategie\/","title":{"rendered":"27 ao\u00fbt: Maladies foliaires\u00a0: la pression des maladies, l\u2019\u00e9tat du feuillage et la date d\u2019arrachage d\u00e9terminent la strat\u00e9gie"},"content":{"rendered":"\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2026\/08\/Kaart-FR-27-08-2026.png\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"411\" src=\"https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2026\/08\/Kaart-FR-27-08-2026.png\" alt=\"\" class=\"wp-image-28575\" srcset=\"https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2026\/08\/Kaart-FR-27-08-2026.png 800w, https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2026\/08\/Kaart-FR-27-08-2026-300x154.png 300w, https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2026\/08\/Kaart-FR-27-08-2026-768x395.png 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/a><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Dans l\u2019ensemble, nous ne constatons qu\u2019une l\u00e9g\u00e8re progression de la cercosporiose par rapport \u00e0 la semaine derni\u00e8re. Localement, son \u00e9volution peut toutefois \u00eatre plus importante. Le nombre de parcelles ayant d\u00e9pass\u00e9 le seuil n\u2019a que l\u00e9g\u00e8rement augment\u00e9. Consultez la situation actuelle sur notre site internet : <a href=\"https:\/\/www.google.com\/maps\/d\/edit?hl=fr&amp;mid=1pcpeOp7dMomqyZnbnsD81hQWazH6u_w&amp;ll=50.44259958413889%2C5.617649089435028&amp;z=10\">Carte des maladies foliaires<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Il est important de tenir compte du fait qu\u2019\u00e0 partir de maintenant, nous appliquons un seuil de nuisibilit\u00e9 de 20 % pour la cercosporiose et la ramulariose. Pour l\u2019o\u00efdium et la rouille, le seuil de nuisibilit\u00e9 a \u00e9t\u00e9 relev\u00e9 \u00e0 30 %&nbsp;:<\/p>\n\n\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><a href=\"https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2026\/08\/Seuils-de-nuisibilite-apres-20-08.png\"><img loading=\"lazy\" decoding=\"async\" width=\"489\" height=\"281\" src=\"https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2026\/08\/Seuils-de-nuisibilite-apres-20-08.png\" alt=\"\" class=\"wp-image-28581\" srcset=\"https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2026\/08\/Seuils-de-nuisibilite-apres-20-08.png 489w, https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2026\/08\/Seuils-de-nuisibilite-apres-20-08-300x172.png 300w\" sizes=\"auto, (max-width: 489px) 100vw, 489px\" \/><\/a><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">Nous observons des sympt\u00f4mes d\u2019o\u00efdium sur 17 % de nos parcelles suivies. L\u2019infection a l\u00e9g\u00e8rement augment\u00e9 par rapport \u00e0 la semaine derni\u00e8re. En revanche, pour la rouille, nous constatons depuis deux semaines une nette diminution du nombre de parcelles pr\u00e9sentant des sympt\u00f4mes. Aujourd\u2019hui, des taches de rouille sont observ\u00e9es sur seulement 28 % des parcelles, contre 66 % il y a deux semaines.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Compte tenu des pluies que nous avons eues et de celles encore annonc\u00e9es, nous recommandons de continuer \u00e0 suivre attentivement la situation. Un traitement n\u2019est indiqu\u00e9 que lorsque le seuil de nuisibilit\u00e9 en vigueur est d\u00e9pass\u00e9.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u00c0 partir de maintenant, il est \u00e9galement important de tenir compte de la vari\u00e9t\u00e9 et de la date d\u2019arrachage pr\u00e9vue. Un traitement fongicide r\u00e9alis\u00e9 dans les 45 jours pr\u00e9c\u00e9dant l\u2019arrachage n\u2019apporte pas de plus-value \u00e9conomique.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">L\u2019\u00e9tat du feuillage joue \u00e9galement un r\u00f4le important. Dans plusieurs parcelles, le feuillage est encore fl\u00e9tri. Dans ces conditions, un produit phytosanitaire peut \u00eatre insuffisamment absorb\u00e9, ce qui r\u00e9duit l\u2019efficacit\u00e9 du traitement. Avant d\u2019effectuer un traitement, il convient donc de prendre en compte la pression actuelle des maladies, le seuil de nuisibilit\u00e9, la vari\u00e9t\u00e9, la date d\u2019arrachage et l\u2019\u00e9tat du feuillage. Vous trouverez davantage d&#8217;informations dans notre <a href=\"https:\/\/www.irbab-kbivb.be\/wp-content\/uploads\/2026\/07\/Fungi-memo-2026-FR-light2.pdf\">Fongi Memo<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vous pouvez \u00e9galement suivre nos parcelles d&#8217;observation en chicor\u00e9e via&nbsp;: <a href=\"https:\/\/www.google.com\/maps\/d\/u\/0\/viewer?mid=1v7yioZAjihEU4lLFmIKBRaSJjoUS1VE&amp;femb=1&amp;ll=50.59410444310526%2C4.4363769999999825&amp;z=9\">Carte des maladies foliaires Chicor\u00e9e<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Dans l\u2019ensemble, nous ne constatons qu\u2019une l\u00e9g\u00e8re progression de la cercosporiose par rapport \u00e0 la semaine derni\u00e8re. Localement, son \u00e9volution peut toutefois \u00eatre plus importante. Le nombre de parcelles ayant d\u00e9pass\u00e9 le seuil n\u2019a que l\u00e9g\u00e8rement augment\u00e9. Consultez la situation actuelle sur notre site internet : Carte des maladies foliaires. Il est important de tenir [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":28575,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"iawp_total_views":236,"footnotes":""},"categories":[2,147,221,129,218],"tags":[243],"class_list":["post-28588","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-betterave","category-chicoree","category-maladies-foliaires","category-protection-des-plantes","category-protection-des-plantes-2","tag-messages"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>27 ao\u00fbt: Maladies foliaires\u00a0: la pression des maladies, l\u2019\u00e9tat du feuillage et la date d\u2019arrachage d\u00e9terminent la strat\u00e9gie - 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\/27-aout-maladies-foliaires-la-pression-des-maladies-letat-du-feuillage-et-la-date-darrachage-determinent-la-strategie\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"27 ao\u00fbt: Maladies foliaires\u00a0: la pression des maladies, l\u2019\u00e9tat du feuillage et la date d\u2019arrachage d\u00e9terminent la strat\u00e9gie - IRBAB-KBIVB\" \/>\n<meta property=\"og:description\" content=\"Dans l\u2019ensemble, nous ne constatons qu\u2019une l\u00e9g\u00e8re progression de la cercosporiose par rapport \u00e0 la semaine derni\u00e8re. 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Localement, son \u00e9volution peut toutefois \u00eatre plus importante. Le nombre de parcelles ayant d\u00e9pass\u00e9 le seuil n\u2019a que l\u00e9g\u00e8rement augment\u00e9. Consultez la situation actuelle sur notre site internet : Carte des maladies foliaires. 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