{"id":26255,"date":"2023-07-17T12:28:04","date_gmt":"2023-07-17T10:28:04","guid":{"rendered":"https:\/\/profert.dz\/fr\/?post_type=avada_portfolio&p=26255"},"modified":"2023-12-12T10:42:02","modified_gmt":"2023-12-12T09:42:02","slug":"pyrale","status":"publish","type":"avada_portfolio","link":"https:\/\/profert.dz\/fr\/index.php\/portfolio-items\/pyrale\/","title":{"rendered":"Pyrale"},"content":{"rendered":"

Pyrale du ma\u00efs<\/h2>\n

La pyrale du ma\u00efs, Ostrinia nubilalis<\/em><\/strong>, un l\u00e9pidopt\u00e8re consid\u00e9r\u00e9 comme le principal ravageur du ma\u00efs en Alg\u00e9rie.\u00a0 Sans un bon suivi de champ et interventions, il peut causer des d\u00e9g\u00e2ts importants.<\/p>\n

<\/h3>\n<\/div>

<\/i><\/i><\/span>Cycle de d\u00e9veloppement<\/span><\/a><\/h4><\/div>
\n

La pyrale du ma\u00efs hiberne en tant que larve L5 dans les d\u00e9bris du ma\u00efs dans le sol, lorsque les journ\u00e9es s\u2019allongent et que la temp\u00e9rature moyenne atteint 10\u00b0C, les larves commencent \u00e0 se transformer en chrysalides (cocons).
\nLes adultes (papillons de 20 \u00e0 30 mm) commencent \u00e0 \u00e9merger environ 2 semaines plus tard.
\nL\u2019accouplement des adultes se fait dans les zones herbac\u00e9es. Les \u0153ufs sont pondus en masses sur la face inf\u00e9rieure des feuilles.
\nChaque jour c\u2019est entre 20 et 50 \u0153ufs qui sont pondus, soit un total compris entre 400 et 600 \u0153ufs pour une femelle pyrale lors de son cycle de vie.
\nLes \u0153ufs \u00e9closent au bout de 10 \u00e0 15 jours.
\nD\u00e8s leur \u00e9closion, les larves p\u00e9n\u00e8trent rapidement \u00e0 l\u2019int\u00e9rieur du cornet de feuilles du ma\u00efs, ensuite dans la tige et au niveau de l\u2019aisselle des feuilles.
\nUne fois \u00e0 l\u2019int\u00e9rieur, elle creuse des galeries jusqu\u2019\u00e0 l\u2019\u00e9pi.
\nLe nombre de g\u00e9n\u00e9ration est de 1 par an (cycle univoltin) ou 2 (cycle bivoltin).<\/p>\n

\"\"<\/p>\n<\/div><\/div><\/div>

<\/i><\/i><\/span>Sympt\u00f4mes et d\u00e9g\u00e2ts<\/span><\/a><\/h4><\/div>
\n

La larve s\u2019attaque \u00e0 toutes les parties a\u00e9riennes du plant (feuilles, tiges, panicules et \u00e9pis).
\nLes plants de ma\u00efs commencent \u00e0 \u00eatre vuln\u00e9rables aux attaques \u00e0 partir du stade 6 \u00e0 8 feuilles, avant ce stade, le ma\u00efs produit une substance toxique DIMBOA contre la larve de la pyrale.
\nApr\u00e8s l\u2019\u00e9closion des \u0153ufs, les larves se nourrissent des feuilles, puis elles p\u00e9n\u00e8trent les tiges pr\u00e8s de panicule m\u00e2le, souvent cass\u00e9 au point de p\u00e9n\u00e9tration (il s\u2019agit d\u2019un bon indicateur de la pr\u00e9sence de la pyrale).
\nLes larves creusent des galeries dans les tiges, ce qui emp\u00eache une circulation normale de la s\u00e8ve et provoque le ph\u00e9nom\u00e8ne de la verse.
\nLes perforations sur le plant de ma\u00efs constituent des portes d\u2019entr\u00e9e pour les champignons du genre fusarium, producteurs de mycotoxines.
\nLa pyrale du ma\u00efs peut occasionner des pertes potentielles de rendement, quantitativement et qualitativement.
\nLes attaques peuvent provoquer 20 \u00e0 30 % de rendement en ma\u00efs grain. Et jusqu\u2019\u00e0 1 t de MS\/ha en ma\u00efs fourrage.
\nElles peuvent aussi d\u00e9grader la valeur alimentaire \u00e0 cause d\u2019un mauvais remplissage de grain et baisse de qualit\u00e9 de la partie a\u00e9rienne (tiges et feuilles).<\/p>\n<\/div><\/div><\/div>

<\/i><\/i><\/span> Strat\u00e9gie de lutte<\/span><\/a><\/h4><\/div>
\n

La lutte doit viser les \u0153ufs et les jeunes larves avant que celles-ci ne p\u00e9n\u00e8trent dans la plante et occasionnent les d\u00e9g\u00e2ts. A la d\u00e9tection de la ponte, il est recommand\u00e9 d\u2019utiliser un insecticide ovo-larvicide pour attaquer les deux stades et s\u2019assurer que les larves ne p\u00e9n\u00e9treront pas dans la tige et atteindre l\u2019\u00e9pi.
\n\u00c0 partir de la ponte, Profert vous recommande l\u2019utilisation de Insegar\u00ae<\/sup><\/strong> \u00e0 la dose de 20 g\/hl<\/strong>. Profert vous recommande \u00e9galement un nouveau produit : Uphold\u00ae<\/sup><\/strong> \u00e0 la dose de 350 ml\/ha<\/strong> \u00e0 tous les stades du ravageur.
\nProfert vous recommande l\u2019utilisation de Deltharin\u00ae<\/sup><\/strong> \u00e0 la dose de 0.4<\/strong> \u00e0 0.5 L\/ha<\/strong>\u00a0\u00e0 partir du stade 6 \u00e0 8 feuilles. Grace \u00e0 son activit\u00e9 ovo-larvicide, il assure que les larves ne p\u00e9n\u00e9treront pas dans la tige et atteindre l\u2019\u00e9pi. Le nombre de traitements ne doit pas d\u00e9passer 2 \u00e0 3 par cycle v\u00e9g\u00e9tatif.<\/p>\n<\/div><\/div><\/div><\/div><\/div>

<\/div><\/div><\/div><\/div><\/div>
<\/div>
<\/div>
<\/div>

Nos solutions<\/h2><\/span>
<\/div><\/div><\/div>
<\/div><\/div><\/div>

Insegar\u00ae<\/sup><\/h3><\/div>
\"\"<\/a><\/div><\/div><\/div><\/div>
<\/i><\/div>
<\/i><\/div><\/div><\/div>
<\/div><\/div><\/div>

Uphold\u00ae<\/sup><\/h3><\/div>
\"\"<\/a><\/div><\/div><\/div><\/div>
<\/i><\/div>
<\/i><\/div><\/div><\/div>
<\/div><\/div><\/div>

Deltharin\u00ae<\/sup><\/h3><\/div>
\"\"<\/a><\/div><\/div><\/div><\/div>
<\/i><\/div>
<\/i><\/div><\/div><\/div>
<\/div><\/div><\/div>
<\/div><\/div><\/div><\/div><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":26316,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"","format":"standard","meta":{"footnotes":""},"portfolio_category":[185],"portfolio_skills":[],"portfolio_tags":[],"class_list":["post-26255","avada_portfolio","type-avada_portfolio","status-publish","format-standard","has-post-thumbnail","hentry","portfolio_category-ravageur-mais"],"yoast_head":"\nPyrale - Profert<\/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:\/\/profert.dz\/fr\/index.php\/portfolio-items\/pyrale\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Pyrale - Profert\" \/>\n<meta property=\"og:url\" content=\"https:\/\/profert.dz\/fr\/index.php\/portfolio-items\/pyrale\/\" \/>\n<meta property=\"og:site_name\" content=\"Profert\" \/>\n<meta property=\"article:modified_time\" content=\"2023-12-12T09:42:02+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/profert.dz\/fr\/wp-content\/uploads\/2023\/07\/Profert-Pyrale-du-ma\u00efs-4.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"900\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data1\" content=\"10 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/profert.dz\/fr\/index.php\/portfolio-items\/pyrale\/\",\"url\":\"https:\/\/profert.dz\/fr\/index.php\/portfolio-items\/pyrale\/\",\"name\":\"Pyrale - Profert\",\"isPartOf\":{\"@id\":\"https:\/\/profert.dz\/fr\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/profert.dz\/fr\/index.php\/portfolio-items\/pyrale\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/profert.dz\/fr\/index.php\/portfolio-items\/pyrale\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/profert.dz\/fr\/wp-content\/uploads\/2023\/07\/Profert-Pyrale-du-ma\u00efs-4.jpg\",\"datePublished\":\"2023-07-17T10:28:04+00:00\",\"dateModified\":\"2023-12-12T09:42:02+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/profert.dz\/fr\/index.php\/portfolio-items\/pyrale\/#breadcrumb\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/profert.dz\/fr\/index.php\/portfolio-items\/pyrale\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\/\/profert.dz\/fr\/index.php\/portfolio-items\/pyrale\/#primaryimage\",\"url\":\"https:\/\/profert.dz\/fr\/wp-content\/uploads\/2023\/07\/Profert-Pyrale-du-ma\u00efs-4.jpg\",\"contentUrl\":\"https:\/\/profert.dz\/fr\/wp-content\/uploads\/2023\/07\/Profert-Pyrale-du-ma\u00efs-4.jpg\",\"width\":1200,\"height\":900},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/profert.dz\/fr\/index.php\/portfolio-items\/pyrale\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Accueil\",\"item\":\"https:\/\/profert.dz\/fr\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Portfolio\",\"item\":\"https:\/\/profert.dz\/fr\/index.php\/portfolio-items\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Pyrale\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/profert.dz\/fr\/#website\",\"url\":\"https:\/\/profert.dz\/fr\/\",\"name\":\"Profert.dz\",\"description\":\"Agriculture Alg\u00e9rie\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/profert.dz\/fr\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"fr-FR\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Pyrale - Profert","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/profert.dz\/fr\/index.php\/portfolio-items\/pyrale\/","og_locale":"fr_FR","og_type":"article","og_title":"Pyrale - Profert","og_url":"https:\/\/profert.dz\/fr\/index.php\/portfolio-items\/pyrale\/","og_site_name":"Profert","article_modified_time":"2023-12-12T09:42:02+00:00","og_image":[{"width":1200,"height":900,"url":"https:\/\/profert.dz\/fr\/wp-content\/uploads\/2023\/07\/Profert-Pyrale-du-ma\u00efs-4.jpg","type":"image\/jpeg"}],"twitter_card":"summary_large_image","twitter_misc":{"Dur\u00e9e de lecture estim\u00e9e":"10 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/profert.dz\/fr\/index.php\/portfolio-items\/pyrale\/","url":"https:\/\/profert.dz\/fr\/index.php\/portfolio-items\/pyrale\/","name":"Pyrale - Profert","isPartOf":{"@id":"https:\/\/profert.dz\/fr\/#website"},"primaryImageOfPage":{"@id":"https:\/\/profert.dz\/fr\/index.php\/portfolio-items\/pyrale\/#primaryimage"},"image":{"@id":"https:\/\/profert.dz\/fr\/index.php\/portfolio-items\/pyrale\/#primaryimage"},"thumbnailUrl":"https:\/\/profert.dz\/fr\/wp-content\/uploads\/2023\/07\/Profert-Pyrale-du-ma\u00efs-4.jpg","datePublished":"2023-07-17T10:28:04+00:00","dateModified":"2023-12-12T09:42:02+00:00","breadcrumb":{"@id":"https:\/\/profert.dz\/fr\/index.php\/portfolio-items\/pyrale\/#breadcrumb"},"inLanguage":"fr-FR","potentialAction":[{"@type":"ReadAction","target":["https:\/\/profert.dz\/fr\/index.php\/portfolio-items\/pyrale\/"]}]},{"@type":"ImageObject","inLanguage":"fr-FR","@id":"https:\/\/profert.dz\/fr\/index.php\/portfolio-items\/pyrale\/#primaryimage","url":"https:\/\/profert.dz\/fr\/wp-content\/uploads\/2023\/07\/Profert-Pyrale-du-ma\u00efs-4.jpg","contentUrl":"https:\/\/profert.dz\/fr\/wp-content\/uploads\/2023\/07\/Profert-Pyrale-du-ma\u00efs-4.jpg","width":1200,"height":900},{"@type":"BreadcrumbList","@id":"https:\/\/profert.dz\/fr\/index.php\/portfolio-items\/pyrale\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Accueil","item":"https:\/\/profert.dz\/fr\/"},{"@type":"ListItem","position":2,"name":"Portfolio","item":"https:\/\/profert.dz\/fr\/index.php\/portfolio-items\/"},{"@type":"ListItem","position":3,"name":"Pyrale"}]},{"@type":"WebSite","@id":"https:\/\/profert.dz\/fr\/#website","url":"https:\/\/profert.dz\/fr\/","name":"Profert.dz","description":"Agriculture Alg\u00e9rie","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/profert.dz\/fr\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"fr-FR"}]}},"_links":{"self":[{"href":"https:\/\/profert.dz\/fr\/index.php\/wp-json\/wp\/v2\/avada_portfolio\/26255"}],"collection":[{"href":"https:\/\/profert.dz\/fr\/index.php\/wp-json\/wp\/v2\/avada_portfolio"}],"about":[{"href":"https:\/\/profert.dz\/fr\/index.php\/wp-json\/wp\/v2\/types\/avada_portfolio"}],"author":[{"embeddable":true,"href":"https:\/\/profert.dz\/fr\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/profert.dz\/fr\/index.php\/wp-json\/wp\/v2\/comments?post=26255"}],"version-history":[{"count":22,"href":"https:\/\/profert.dz\/fr\/index.php\/wp-json\/wp\/v2\/avada_portfolio\/26255\/revisions"}],"predecessor-version":[{"id":27738,"href":"https:\/\/profert.dz\/fr\/index.php\/wp-json\/wp\/v2\/avada_portfolio\/26255\/revisions\/27738"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/profert.dz\/fr\/index.php\/wp-json\/wp\/v2\/media\/26316"}],"wp:attachment":[{"href":"https:\/\/profert.dz\/fr\/index.php\/wp-json\/wp\/v2\/media?parent=26255"}],"wp:term":[{"taxonomy":"portfolio_category","embeddable":true,"href":"https:\/\/profert.dz\/fr\/index.php\/wp-json\/wp\/v2\/portfolio_category?post=26255"},{"taxonomy":"portfolio_skills","embeddable":true,"href":"https:\/\/profert.dz\/fr\/index.php\/wp-json\/wp\/v2\/portfolio_skills?post=26255"},{"taxonomy":"portfolio_tags","embeddable":true,"href":"https:\/\/profert.dz\/fr\/index.php\/wp-json\/wp\/v2\/portfolio_tags?post=26255"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}