{"id":2075,"date":"2022-08-24T12:15:28","date_gmt":"2022-08-24T10:15:28","guid":{"rendered":"https:\/\/normandiemaine.cerfrance.fr\/arad2\/?p=2075"},"modified":"2024-06-05T10:47:10","modified_gmt":"2024-06-05T08:47:10","slug":"leviers-agronomiques-ray-grass-resistants","status":"publish","type":"post","link":"https:\/\/normandiemaine.cerfrance.fr\/arad2\/leviers-agronomiques-ray-grass-resistants\/","title":{"rendered":"Ray Grass r\u00e9sistants"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">Des leviers agronomiques indispensables\u00a0pour g\u00e9rer durablement les Ray Grass r\u00e9sistants<\/h1>\n\n\n\n<p class=\"has-medium-font-size\">Vincent FAGGIANELLI, conseiller agronome chez <a href=\"https:\/\/www.cerfrance.fr\/agence-expert-comptable\/cerfrance-normandie-ouest\/expert-comptable-fleury-sur-orne-siege\" target=\"_blank\" rel=\"noreferrer noopener\">Cerfrance Normandie Ouest<\/a>, nous pr\u00e9sente la strat\u00e9gie mise en place chez son client pour g\u00e9rer sa probl\u00e9matique Ray Grass r\u00e9sistants. En effet, le Ray Grass r\u00e9sistant a fait perdre \u00e0 cet agriculteur une trentaine de quintaux de bl\u00e9 en 2021.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<figure class=\"wp-block-embed aligncenter is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"Leviers agronomiques pour g\u00e9rer les Ray Grass r\u00e9sistants\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/IVxz7jN6qsU?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><figcaption class=\"wp-element-caption\"><em>Des leviers agronomiques indispensables\u00a0pour g\u00e9rer durablement les Ray Grass r\u00e9sistants<\/em><\/figcaption><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Les raisons de la pr\u00e9sences de Ray Grass r\u00e9sistants<\/h2>\n\n\n\n<p><\/p>\n\n\n\n<p>Selon Vincent FAGGIANELLI, <strong>deux raisons principales expliquent l\u2019apparition de cette probl\u00e9matique chez cet agriculteur<\/strong>&nbsp;:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>L\u2019<strong>utilisation syst\u00e9matique des m\u00eames mati\u00e8res actives d\u2019herbicides<\/strong> en c\u00e9r\u00e9ales,<\/li>\n\n\n\n<li>Une rotation bl\u00e9\/ma\u00efs dont le d\u00e9sherbage repose sur <strong>une seule famille d\u2019herbicides, les sulfonylur\u00e9es<\/strong>.<\/li>\n<\/ol>\n\n\n\n<p>A court terme, pour g\u00e9rer cette forte pression et ne pas avoir de perte de rendement sur bl\u00e9, Vincent FAGGIANELLI a d\u2019abord pr\u00e9conis\u00e9 un <strong>fort investissement sur le d\u00e9sherbage d\u2019automne avec un programme herbicide avoisinant les 120\u00a0\u20ac par hectare<\/strong>. Ici, l\u2019objectif est double\u00a0: ne pas impacter le rendement mais \u00e9galement limiter l\u2019augmentation du stock semencier de Ray Grass. En effet, <strong>un seul pied de Ray Grass peut produire plus de 500 graines<\/strong>.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Les leviers agronomiques contre les Ray Grass r\u00e9sistants<\/h2>\n\n\n\n<p><\/p>\n\n\n\n<p>Un programme herbicide est au mieux efficace \u00e0 90-95 %. Il reste donc indispensable de r\u00e9duire la pression sur le long terme. Pour cela, en concertation avec Vincent FAGGIANELLI, l\u2019agriculteur a choisi d\u2019actionner<strong> trois leviers agronomiques<\/strong>\u00a0:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>R\u00e9duire la fr\u00e9quence de labour<\/strong>. Il s\u2019agit pour lui de passer d\u2019un labour syst\u00e9matique chaque ann\u00e9e \u00e0 un labour tous les trois ans minimum pour laisser les graines de Ray Grass plus longtemps enfouis, notamment en semant son bl\u00e9 en direct.<\/li>\n\n\n\n<li><strong>Implanter un couvert dit \u00ab\u00a0all\u00e9lopathique\u00a0\u00bb<\/strong> entre bl\u00e9 et ma\u00efs. L\u2019agriculteur ayant un troupeau de vaches allaitantes, le choix s\u2019est port\u00e9 sur un seigle forestier. Cela lui permet une valorisation en d\u00e9rob\u00e9e, tout en b\u00e9n\u00e9ficiant de son effet all\u00e9lopathique qui inhibe la germination des graines de Ray Grass. \u00a0<\/li>\n\n\n\n<li><strong>Int\u00e9grer une nouvelle culture de printemps<\/strong> comme le pois ou la f\u00e9verole pour diversifier la rotation.<\/li>\n\n\n\n<li><\/li>\n<\/ul>\n\n\n\n<p>Et c\u2019est bien la combinaison de ces leviers agronomiques et d\u2019un programme de d\u00e9sherbage adapt\u00e9 qui permettra d\u2019ici trois \u00e0 cinq ans d\u2019\u00e9radiquer sa probl\u00e9matique Ray Grass r\u00e9sistants.<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Des leviers agronomiques indispensables\u00a0pour g\u00e9rer durablement les Ray Grass r\u00e9sistants<\/p>\n","protected":false},"author":4,"featured_media":2077,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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