{"id":26252,"date":"2023-07-17T12:20:43","date_gmt":"2023-07-17T10:20:43","guid":{"rendered":"https:\/\/profert.dz\/fr\/?post_type=avada_portfolio&p=26252"},"modified":"2023-12-12T10:42:44","modified_gmt":"2023-12-12T09:42:44","slug":"pourpier","status":"publish","type":"avada_portfolio","link":"https:\/\/profert.dz\/fr\/index.php\/portfolio-items\/pourpier\/","title":{"rendered":"Pourpier"},"content":{"rendered":"

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

Le pourpier, Portulaca oleracea L<\/em>, est une plante annuelle dicotyl\u00e9done qui appartient \u00e0 la famille des Portulacac\u00e9es.
\nLe pourpier est une adventice majeure, elle compte parmi les esp\u00e8ces les plus nuisibles des grandes cultures.<\/p>\n<\/div>

<\/i><\/i><\/span>Biologie<\/span><\/a><\/h4><\/div>
\n

Le pourpier est caract\u00e9ris\u00e9 par\u00a0:
\n\u2013 Une racine pivotante, profonde et \u00e9paisse.
\n\u2013 Une tige cylindrique principale qui se divise en nombreuses tiges secondaires \u00e9tal\u00e9es sur le sol, ou parfois dress\u00e9es.
\n\u2013 Des feuilles oppos\u00e9es par paires, le long de la tige.
\n\u2013 Des fleurs axillaires et solitaires, de couleur jaune.
\n\u2013 Un fruit de forme globuleuse, qui contient de nombreuses graines.
\n\u2013 Des graines ovales, petites et noires.<\/p>\n

Le pourpier germe \u00e0 la fin d\u2019hiver et pendant tout le printemps, la floraison a lieu de mai \u00e0 septembre. Seules les graines qui sont dans la couche superficielle du sol germent.<\/p>\n

Il se multiplie par graines, mais il a la capacit\u00e9 de se multiplier par bouturage (\u00e0 partir de fragments de tiges).<\/p>\n

Un plant de pourpier peut produire jusqu\u2019\u00e0 10 000 graines, une caract\u00e9ristique qui confirme son grand potentiel d\u2019envahissement.<\/p>\n

Le pourpier est tr\u00e8s nuisible \u00e0 cause de sa croissance rapide, il est capable d\u2019accomplir son cycle en 1 mois, s\u2019il fait chaud et humide (des conditions r\u00e9unies dans la culture du ma\u00efs conduite sous pivot dans le sud d\u2019Alg\u00e9rie).<\/p>\n<\/div><\/div><\/div>

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

Lutte prophylactique et culturale<\/strong>
\n\u2013 La technique de faux-semis\u00a0: contribue \u00e0 limiter le salissement de la culture par cette esp\u00e8ce.
\n\u2013 Le raisonnement de la fertilisation\u00a0: comme le pourpier est une esp\u00e8ce nitrophile, la forte disponibilit\u00e9 en azote min\u00e9ral dans le sol en d\u00e9but de cycle cultural favorise sa croissance.
\n\u2013 L\u2019enfouissement du stock semencier par le labour.<\/p>\n

Lutte m\u00e9canique<\/strong>
\nLe d\u00e9sherbage m\u00e9canique\u00a0: cette op\u00e9ration est compliqu\u00e9e, compte tenu de la capacit\u00e9 des tiges coup\u00e9es \u00e0 refaire des racines.<\/p>\n

Lutte chimique<\/strong>
\nLe d\u00e9sherbage chimique reste la meilleure solution pour lutter contre le pourpier, comme le d\u00e9sherbage m\u00e9canique est compliqu\u00e9.
\nProfert pr\u00e9conise\u00a0Prowl\u00ae<\/sup>\u00a0Aqua<\/strong>, un herbicide de pr\u00e9lev\u00e9e utilis\u00e9 \u00e0\u00a02,5 L\/ha<\/strong>, il conf\u00e8re une r\u00e9manence allant jusqu\u2019\u00e0 deux mois. Ce d\u00e9sherbage consiste \u00e0 inhiber la germination des graines des adventices et bloquer leur d\u00e9veloppement. Ce type de d\u00e9sherbage permet au ma\u00efs de bien d\u00e9marrer, de gagner rapidement en vigueur et de profiter de toute la quantit\u00e9 d\u2019eau et des \u00e9l\u00e9ments nutritifs. Cela permet de bien d\u00e9velopper son potentiel de rendement.<\/p>\n

Profert recommande\u00a0Mustang<\/strong>\u00ae<\/sup><\/strong>\u00a0360<\/strong>\u00a0un herbicide de post-lev\u00e9e utilis\u00e9 \u00e0\u00a00.6 L\/ha<\/strong>, au stade de 2 \u00e0 8 feuilles de l\u2019adventice (adventice jeune en plein croissance v\u00e9g\u00e9tative).
\nMustang\u00ae<\/sup>\u00a0360<\/strong>\u00a0est un herbicide \u00e0 appliquer une fois par compagne.<\/p>\n<\/div><\/div><\/div><\/div><\/div>

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Nos solutions<\/h2><\/span>
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Mustang\u00ae<\/sup><\/h3><\/div>
\"\"<\/a><\/div><\/div><\/div><\/div>
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Prowl\u00ae<\/sup> Aqua<\/h3><\/div>
\"\"<\/a><\/div><\/div><\/div><\/div>
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<\/div><\/div><\/div><\/div><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":26317,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"","format":"standard","meta":{"footnotes":""},"portfolio_category":[183],"portfolio_skills":[],"portfolio_tags":[],"class_list":["post-26252","avada_portfolio","type-avada_portfolio","status-publish","format-standard","has-post-thumbnail","hentry","portfolio_category-adventices"],"yoast_head":"\nPourpier - 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\/pourpier\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Pourpier - Profert\" \/>\n<meta property=\"og:url\" content=\"https:\/\/profert.dz\/fr\/index.php\/portfolio-items\/pourpier\/\" \/>\n<meta property=\"og:site_name\" content=\"Profert\" \/>\n<meta property=\"article:modified_time\" content=\"2023-12-12T09:42:44+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/profert.dz\/fr\/wp-content\/uploads\/2023\/07\/Profert-Pourpier-1.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=\"8 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\/pourpier\/\",\"url\":\"https:\/\/profert.dz\/fr\/index.php\/portfolio-items\/pourpier\/\",\"name\":\"Pourpier - 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