{"id":1702,"date":"2022-05-19T09:57:43","date_gmt":"2022-05-19T07:57:43","guid":{"rendered":"https:\/\/normandiemaine.cerfrance.fr\/arad2\/?p=1702"},"modified":"2023-03-07T09:23:51","modified_gmt":"2023-03-07T08:23:51","slug":"essai-desherbage-mecanique","status":"publish","type":"post","link":"https:\/\/normandiemaine.cerfrance.fr\/arad2\/essai-desherbage-mecanique\/","title":{"rendered":"Essai d\u00e9sherbage m\u00e9canique"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">Essai d\u00e9sherbage m\u00e9canique&nbsp;: une ann\u00e9e propice&nbsp;!<\/h1>\n\n\n\n<p>Un essai a \u00e9t\u00e9 mis en place chez un <strong>agriculteur du groupe DEPHY<\/strong> dans le Sud Manche. L&rsquo;objectif est de tester une<strong> strat\u00e9gie 100 % d\u00e9sherbage m\u00e9canique avec la possibilit\u00e9 de rattraper en chimique si n\u00e9cessaire. <\/strong>Les deux premiers relev\u00e9s de suivi montrent une <strong>bonne ma\u00eetrise des adventices <\/strong>par le passage des outils m\u00e9caniques.<\/p>\n\n\n\n<p>De par son \u00e9cartement important, le ma\u00efs est une culture qui se pr\u00eate parfaitement au d\u00e9sherbage m\u00e9canique. Les conditions s\u00e8ches du printemps ont \u00e9t\u00e9 l\u2019occasion de voir beaucoup d\u2019agriculteurs utiliser le <strong>d\u00e9sherbage m\u00e9canique comme substitution aux herbicides de synth\u00e8se<\/strong>, notamment les racinaires peu efficaces en conditions s\u00e8ches.<\/p>\n\n\n<div class=\"_3d-flip-book  fb3d-fullscreen-mode full-size\" data-id=\"1699\" data-mode=\"fullscreen\" data-title=\"false\" data-template=\"short-white-book-view\" data-lightbox=\"dark-shadow\" data-urlparam=\"fb3d-page\" data-page-n=\"0\" data-pdf=\"\" data-tax=\"null\" data-thumbnail=\"\" data-cols=\"3\" data-book-template=\"default\" data-trigger=\"\"><\/div><script type=\"text\/javascript\">window.FB3D_CLIENT_DATA = window.FB3D_CLIENT_DATA || [];FB3D_CLIENT_DATA.push('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');window.FB3D_CLIENT_LOCALE && FB3D_CLIENT_LOCALE.render && FB3D_CLIENT_LOCALE.render();<\/script>\n\n\n\n<h2 class=\"wp-block-heading\">La gestion des adventices au c\u0153ur du programme de travail du groupe DEPHY ECOPLAINE50<\/h2>\n\n\n\n<p>Le pilote du <strong>groupe DEPHY ECOPLAINE50<\/strong> est Cerfrance Normandie Maine. Il se situe pr\u00e8s de Pontorson dans la Manche (proche Mont Saint Michel). Le groupe se compose de 11 agriculteurs, dont huit engag\u00e9s depuis 2012 dans le r\u00e9seau. Ce sont des \u00e9leveurs avec majoritairement un atelier bovin lait mais \u00e9galement bovin viande, porc ou volaille. Les <strong>structures sont tr\u00e8s variables<\/strong> en termes de :<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>taille<\/strong> des ateliers, <\/li><li><strong>surface agricole utile<\/strong> (de 37 \u00e0 210 ha) <\/li><li><strong>main d\u2019\u0153uvre<\/strong> disponible (de 1 \u00e0 4 UTH). <\/li><\/ul>\n\n\n\n<p>Les principales cultures sont bl\u00e9, orge, ma\u00efs fourrage et grain, colza et prairies. Ces derni\u00e8res ne sont pas en rotation avec les autres cultures. De plus, <strong>les syst\u00e8mes de cultures sont repr\u00e9sentatifs du secteur.<\/strong><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img data-recalc-dims=\"1\" fetchpriority=\"high\" decoding=\"async\" width=\"922\" height=\"698\" src=\"https:\/\/i0.wp.com\/normandiemaine.cerfrance.fr\/arad2\/wp-content\/uploads\/sites\/3\/2022\/05\/Repartition-exploitations-en-fonction-de-leur-IFT.png?resize=922%2C698&#038;ssl=1\" alt=\"R\u00e9partition des exploitations en fonction de leur IFT exploitation en % de la r\u00e9f\u00e9rence\" class=\"wp-image-1703\" srcset=\"https:\/\/i0.wp.com\/normandiemaine.cerfrance.fr\/arad2\/wp-content\/uploads\/sites\/3\/2022\/05\/Repartition-exploitations-en-fonction-de-leur-IFT.png?w=922&amp;ssl=1 922w, https:\/\/i0.wp.com\/normandiemaine.cerfrance.fr\/arad2\/wp-content\/uploads\/sites\/3\/2022\/05\/Repartition-exploitations-en-fonction-de-leur-IFT.png?resize=300%2C227&amp;ssl=1 300w, https:\/\/i0.wp.com\/normandiemaine.cerfrance.fr\/arad2\/wp-content\/uploads\/sites\/3\/2022\/05\/Repartition-exploitations-en-fonction-de-leur-IFT.png?resize=768%2C581&amp;ssl=1 768w\" sizes=\"(max-width: 922px) 100vw, 922px\" \/><figcaption>R\u00e9partition des exploitations en fonction de leur IFT exploitation en % de la r\u00e9f\u00e9rence<\/figcaption><\/figure><\/div>\n\n\n\n<p>Les <strong>indices de fr\u00e9quence de traitement (IFT)<\/strong> calcul\u00e9s \u00e0 l\u2019\u00e9chelle de l\u2019exploitation, ont fortement \u00e9volu\u00e9 pour tous les agriculteurs du groupe. Ainsi, en 2020, <strong>90 % sont en dessous des 75 % de la <a href=\"https:\/\/normandie.chambres-agriculture.fr\/conseils-et-services\/preserver-lenvironnement\/maec\/indice-de-frequence-de-traitement\/\" target=\"_blank\" rel=\"noreferrer noopener\">r\u00e9f\u00e9rence r\u00e9gionale Normandie Fili\u00e8re Polyculture \u00c9levage<\/a><\/strong> (3,4). De plus, cinq sont m\u00eame en dessous des 50 %. Si beaucoup d\u2019efforts ont \u00e9t\u00e9 consentis sur la gestion des maladies, et plus modestement des ravageurs, la probl\u00e9matique herbicide reste \u00e0 travailler. Ces exploitations ont une proportion de ma\u00efs fourrage et grain souvent importante dans leur assolement. Le<strong> d\u00e9sherbage m\u00e9canique<\/strong> de cette culture est donc une piste privil\u00e9gi\u00e9e.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Le suivi d\u2019un essai d\u00e9sherbage m\u00e9canique en partenariat avec Agrobio35<\/h2>\n\n\n\n<p><strong>Protocole<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Sol limoneux<\/li><li>Passage de houe rotative effectu\u00e9 au stade 2 feuilles du ma\u00efs le 2 mai<\/li><li>Relev\u00e9 n\u00b01 r\u00e9alis\u00e9 le 6 mai<\/li><li>Passage de roto\u00e9trille le 10 mai<\/li><li>Relev\u00e9 n\u00b02 r\u00e9alis\u00e9 le 13 mai<\/li><\/ul>\n\n\n\n<p><em>Pour chaque relev\u00e9, cinq r\u00e9p\u00e9titions ont \u00e9t\u00e9 r\u00e9alis\u00e9es.<\/em><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img data-recalc-dims=\"1\" decoding=\"async\" width=\"415\" height=\"261\" src=\"https:\/\/i0.wp.com\/normandiemaine.cerfrance.fr\/arad2\/wp-content\/uploads\/sites\/3\/2022\/05\/passage-rotoetrille.png?resize=415%2C261&#038;ssl=1\" alt=\"Passage de roto\u00e9trille le 10 mai sur la parcelle\" class=\"wp-image-1704\" srcset=\"https:\/\/i0.wp.com\/normandiemaine.cerfrance.fr\/arad2\/wp-content\/uploads\/sites\/3\/2022\/05\/passage-rotoetrille.png?w=415&amp;ssl=1 415w, https:\/\/i0.wp.com\/normandiemaine.cerfrance.fr\/arad2\/wp-content\/uploads\/sites\/3\/2022\/05\/passage-rotoetrille.png?resize=300%2C189&amp;ssl=1 300w\" sizes=\"(max-width: 415px) 100vw, 415px\" \/><figcaption>Passage de roto\u00e9trille au 10 mai<\/figcaption><\/figure><\/div>\n\n\n\n<p><strong>Premiers r\u00e9sultats<\/strong><\/p>\n\n\n\n<p>Les deux relev\u00e9s permettent de mettre en \u00e9vidence une <strong>tr\u00e8s bonne efficacit\u00e9 du d\u00e9sherbage m\u00e9canique<\/strong>, avec moins de trois adventices au m\u00b2. Le passage de roto \u00e9trille a permis de maintenir ce nombre. A l\u2019inverse, on peut observer de <strong>nouvelles lev\u00e9es d\u2019adventices dans le t\u00e9moin non d\u00e9sherb\u00e9<\/strong>. Le nombre passe de 30 adventices au m\u00b2 \u00e0 50 lors du second relev\u00e9.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img data-recalc-dims=\"1\" decoding=\"async\" width=\"771\" height=\"426\" src=\"https:\/\/i0.wp.com\/normandiemaine.cerfrance.fr\/arad2\/wp-content\/uploads\/sites\/3\/2022\/05\/premiers-resultats-dephy.png?resize=771%2C426&#038;ssl=1\" alt=\"Photo de la parcelle au 6 mai et nombre d'adventice au 6 et 13 mai\" class=\"wp-image-1705\" srcset=\"https:\/\/i0.wp.com\/normandiemaine.cerfrance.fr\/arad2\/wp-content\/uploads\/sites\/3\/2022\/05\/premiers-resultats-dephy.png?w=771&amp;ssl=1 771w, https:\/\/i0.wp.com\/normandiemaine.cerfrance.fr\/arad2\/wp-content\/uploads\/sites\/3\/2022\/05\/premiers-resultats-dephy.png?resize=300%2C166&amp;ssl=1 300w, https:\/\/i0.wp.com\/normandiemaine.cerfrance.fr\/arad2\/wp-content\/uploads\/sites\/3\/2022\/05\/premiers-resultats-dephy.png?resize=768%2C424&amp;ssl=1 768w\" sizes=\"(max-width: 771px) 100vw, 771px\" \/><figcaption>Photo de la parcelle au 6 mai et nombre d&rsquo;adventice au 6 et 13 mai<\/figcaption><\/figure><\/div>\n\n\n\n<p>Au niveau de la flore adventice,  on observe dans la <strong>grande majorit\u00e9 des dicotyl\u00e9dones<\/strong>, avec principalement des ch\u00e9nopodes blancs et des stellaires interm\u00e9diaires. On observe \u00e9galement une <strong>lev\u00e9e de renou\u00e9e des oiseaux<\/strong> lors du second relev\u00e9.<\/p>\n\n\n\n<p>La mise \u00e0 jour de ces r\u00e9sultats se fait \u00e0 mesure du suivi de la parcelle.<\/p>\n\n\n\n<p>Toutes nos publications sur la <a href=\"https:\/\/normandiemaine.cerfrance.fr\/arad2\/category\/reductions-dintrants-en-cultures-et-en-elevage\/\" target=\"_blank\" rel=\"noreferrer noopener\">r\u00e9duction des intrants en culture et en \u00e9levage<\/a> est disponible sur notre site internet.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>R\u00e9sultats de l&rsquo;essai 100 % d\u00e9sherbage m\u00e9canique avec la possibilit\u00e9 de rattraper en chimique<\/p>\n","protected":false},"author":4,"featured_media":1709,"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":"default","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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