{"id":895,"date":"2019-12-20T18:39:00","date_gmt":"2019-12-20T17:39:00","guid":{"rendered":"https:\/\/normandiemaine.cerfrance.fr\/arad2\/?p=895"},"modified":"2023-03-07T09:24:01","modified_gmt":"2023-03-07T08:24:01","slug":"les-plantes-compagnes-une-piste-prometteuse-pour-reduire-les-insecticides","status":"publish","type":"post","link":"https:\/\/normandiemaine.cerfrance.fr\/arad2\/les-plantes-compagnes-une-piste-prometteuse-pour-reduire-les-insecticides\/","title":{"rendered":"R\u00e9duire les insecticides avec les plantes compagnes"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">Les plantes compagnes : une piste prometteuse pour r\u00e9duire les insecticides<\/h1>\n\n\n\n<p>Les <strong>plantes compagnes sont une piste prometteuse pour r\u00e9duire les insecticides et lutter contre les parasites, maladies et mauvaises herbes<\/strong>. En effet, les associations de cultures s\u2019av\u00e8rent \u00eatre b\u00e9n\u00e9fiques pour la lutte contre les parasites, les maladies et les mauvaises herbes. Elles permettent aussi d\u2019am\u00e9liorer de mani\u00e8re tr\u00e8s concr\u00e8te la biodiversit\u00e9 sur les exploitations. Le <strong>d\u00e9veloppement des associations de cultures est aujourd\u2019hui limit\u00e9 par des freins logistiques<\/strong>. Les capacit\u00e9s de triage sont limit\u00e9es et les co\u00fbts sont importants.<\/p>\n\n\n\n<p>Le d<strong>\u00e9veloppement des associations temporaires avec des plantes compagnes n\u2019est par contre pas impact\u00e9 par ces freins logistiques<\/strong>. Plusieurs cultures sem\u00e9es mais une seule culture est r\u00e9colt\u00e9e, les autres rendant des services \u00e9cosyst\u00e9miques. Le colza sem\u00e9 avec des plantes compagnes en est un tr\u00e8s bon exemple. Des initiatives existent pour d\u00e9velopper ces associations \u00e0 d\u2019autres cultures. Focus sur deux retours d\u2019exp\u00e9riences.<\/p>\n\n\n<div class=\"_3d-flip-book  fb3d-fullscreen-mode full-size\" data-id=\"894\" 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\">Les associations de cultures<\/h2>\n\n\n\n<p>Les <strong>associations de cultures sont utilis\u00e9es depuis l&rsquo;aube de l&rsquo;agriculture<\/strong>. Mais elles ont progressivement disparu. Principalement par l&rsquo;intensification des agro-\u00e9cosyst\u00e8mes et<br>l\u2019optimisation des outils de collecte et de transport des productions agricoles. Toutefois, ces syst\u00e8mes sont actuellement remis en cause avec :<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>l&rsquo;\u00e9mergence des pr\u00e9occupations d&rsquo;\u00e9conomie d&rsquo;intrants, <\/li><li>la n\u00e9cessit\u00e9 d&rsquo;am\u00e9liorer l&rsquo;efficience des facteurs de production et de pr\u00e9server la biodiversit\u00e9.<\/li><\/ul>\n\n\n\n<p>Les <strong>associations de deux cultures tout au long du cycle sont utilis\u00e9es majoritairement en agriculture biologique<\/strong>. Il y a deux raisons \u00e0 cela :  <\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>la gestion de l\u2019azote,<\/li><li>la protection des cultures. <\/li><\/ul>\n\n\n\n<p>Pour les agriculteurs plus conventionnels, et notamment les c\u00e9r\u00e9aliers, la n\u00e9cessit\u00e9 de trier la r\u00e9colte avant la commercialisation limite le d\u00e9veloppement de ces associations.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Les associations temporaires avec les plantes compagnes<\/h2>\n\n\n\n<p>Par contre, des associations temporaires avec des plantes compagnes se d\u00e9mocratisent, principalement avec le colza. De nouvelles associations sont test\u00e9es chez les agriculteurs. Par exemple, le bl\u00e9 est utilis\u00e9 comme plante compagne pour le ma\u00efs afin de le prot\u00e9ger du taupin. En effet, le bl\u00e9 implant\u00e9 \u00e0 la vol\u00e9e avant le semis de ma\u00efs est plus app\u00e9tant pour le taupin. Il permet donc de limiter les attaques sur ma\u00efs. <\/p>\n\n\n\n<p>Des essais ont \u00e9t\u00e9 men\u00e9s par un des groupes DEPHY de la Chambre R\u00e9gionale de Bretagne. Ils d\u00e9montrent alors un effet int\u00e9ressant avec des attaques plus faibles que pour les modalit\u00e9s chimiques. Et, il y a en prime un effet \u00ab dissuasif \u00bb sur les corbeaux. Dans une autre approche, un agriculteur du Kent, Andy Howard s\u00e8me de l\u2019avoine de printemps avec son lin ol\u00e9agineux. L&rsquo;objectif est la r\u00e9duction de l\u2019impact des altises et des adventices, mais aussi un taux de survie de + 13 \u00e0 17 % avec de l\u2019avoine.<\/p>\n\n\n\n<p>De nombreuses associations restent \u00e0 imaginer&#8230;<\/p>\n\n\n\n<p>Retrouvez toutes nos publications sur la <a href=\"https:\/\/normandiemaine.cerfrance.fr\/arad2\/category\/reductions-dintrants-en-cultures-et-en-elevage\/proteger-les-cultures\/\" target=\"_blank\" rel=\"noreferrer noopener\">protection des cultures<\/a> sur notre site internet.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Les plantes compagnes sont une piste prometteuse pour r\u00e9duire les insecticides et lutter contre les parasites, maladies et mauvaises herbes.<\/p>\n","protected":false},"author":4,"featured_media":1517,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","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":"default","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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