{"id":55146,"date":"2026-10-15T14:47:34","date_gmt":"2026-10-15T14:47:34","guid":{"rendered":"https:\/\/somosalfalfa.com.ar\/negocios-noticias\/?p=55146"},"modified":"2026-10-15T14:47:35","modified_gmt":"2026-10-15T14:47:35","slug":"manejo-malezas-cultivo-alfalfa-inta","status":"publish","type":"post","link":"https:\/\/somosalfalfa.com.ar\/negocios-noticias\/manejo-malezas-cultivo-alfalfa-inta\/","title":{"rendered":"Manejo de malezas en alfalfa: Claves desde la implantaci\u00f3n hasta el control qu\u00edmico"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">En el marco de la jornada <strong>ExpoAlfa Norte<\/strong> (Villa \u00c1ngela, Chaco), la <strong>Dra. Alejandra Ledda<\/strong>, investigadora de la EEA INTA Las Bre\u00f1as, present\u00f3 un an\u00e1lisis estrat\u00e9gico sobre la gesti\u00f3n integral de malezas en alfalfares. La especialista remarc\u00f3 que la etapa de implantaci\u00f3n es el momento m\u00e1s cr\u00edtico de la pastura, donde las condiciones del lote condicionan de forma irreversible el rendimiento y la vida \u00fatil del cultivo.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Para consolidar un stand \u00f3ptimo, es indispensable garantizar un <strong>\u00abLote Limpio\u00bb<\/strong> mediante un diagn\u00f3stico previo y barbechos qu\u00edmicos preventivos que eviten la competencia interespec\u00edfica por agua, luz y nutrientes desde el primer d\u00eda.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/somosalfalfa.com.ar\/negocios-noticias\/wp-content\/uploads\/2026\/10\/IMG_3708-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" data-id=\"55150\" src=\"https:\/\/somosalfalfa.com.ar\/negocios-noticias\/wp-content\/uploads\/2026\/10\/IMG_3708-1024x683.jpg\" alt=\"\" class=\"wp-image-55150\" srcset=\"https:\/\/somosalfalfa.com.ar\/negocios-noticias\/wp-content\/uploads\/2026\/10\/IMG_3708-1024x683.jpg 1024w, https:\/\/somosalfalfa.com.ar\/negocios-noticias\/wp-content\/uploads\/2026\/10\/IMG_3708-300x200.jpg 300w, https:\/\/somosalfalfa.com.ar\/negocios-noticias\/wp-content\/uploads\/2026\/10\/IMG_3708-768x512.jpg 768w, https:\/\/somosalfalfa.com.ar\/negocios-noticias\/wp-content\/uploads\/2026\/10\/IMG_3708-1536x1024.jpg 1536w, https:\/\/somosalfalfa.com.ar\/negocios-noticias\/wp-content\/uploads\/2026\/10\/IMG_3708-2048x1365.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/somosalfalfa.com.ar\/negocios-noticias\/wp-content\/uploads\/2026\/10\/IMG_3775-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" data-id=\"55152\" src=\"https:\/\/somosalfalfa.com.ar\/negocios-noticias\/wp-content\/uploads\/2026\/10\/IMG_3775-1024x683.jpg\" alt=\"\" class=\"wp-image-55152\" srcset=\"https:\/\/somosalfalfa.com.ar\/negocios-noticias\/wp-content\/uploads\/2026\/10\/IMG_3775-1024x683.jpg 1024w, https:\/\/somosalfalfa.com.ar\/negocios-noticias\/wp-content\/uploads\/2026\/10\/IMG_3775-300x200.jpg 300w, https:\/\/somosalfalfa.com.ar\/negocios-noticias\/wp-content\/uploads\/2026\/10\/IMG_3775-768x512.jpg 768w, https:\/\/somosalfalfa.com.ar\/negocios-noticias\/wp-content\/uploads\/2026\/10\/IMG_3775-1536x1024.jpg 1536w, https:\/\/somosalfalfa.com.ar\/negocios-noticias\/wp-content\/uploads\/2026\/10\/IMG_3775-2048x1365.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/somosalfalfa.com.ar\/negocios-noticias\/wp-content\/uploads\/2026\/10\/IMG_3714-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" data-id=\"55147\" src=\"https:\/\/somosalfalfa.com.ar\/negocios-noticias\/wp-content\/uploads\/2026\/10\/IMG_3714-1024x683.jpg\" alt=\"\" class=\"wp-image-55147\" srcset=\"https:\/\/somosalfalfa.com.ar\/negocios-noticias\/wp-content\/uploads\/2026\/10\/IMG_3714-1024x683.jpg 1024w, https:\/\/somosalfalfa.com.ar\/negocios-noticias\/wp-content\/uploads\/2026\/10\/IMG_3714-300x200.jpg 300w, https:\/\/somosalfalfa.com.ar\/negocios-noticias\/wp-content\/uploads\/2026\/10\/IMG_3714-768x512.jpg 768w, https:\/\/somosalfalfa.com.ar\/negocios-noticias\/wp-content\/uploads\/2026\/10\/IMG_3714-1536x1024.jpg 1536w, https:\/\/somosalfalfa.com.ar\/negocios-noticias\/wp-content\/uploads\/2026\/10\/IMG_3714-2048x1365.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n<\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Cuantificaci\u00f3n del impacto de las malezas<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">La presencia de flora invasora no solo afecta el plano visual, sino que genera p\u00e9rdidas severas en el sistema forrajero:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Reducci\u00f3n de rendimiento:<\/strong> Presiones bajas de malezas (entre un 5% y un 35% de cobertura) pueden provocar mermas de hasta el <strong>70% en la producci\u00f3n total de materia seca<\/strong>.<\/li>\n\n\n\n<li><strong>Calidad y longevidad:<\/strong> Deterioran el valor proteico del forraje e impulsan una degradaci\u00f3n prematura de la pastura, acortando sus a\u00f1os de vida \u00fatil.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Mientras que en la fase de implantaci\u00f3n predominan malezas de hoja ancha y rosetas de ciclo oto\u00f1o-inverno-primaveral (como <em>Coronopus didymus<\/em> y <em>Amaranthus palmeri<\/em>), en pasturas consolidadas la comunidad evoluciona hacia especies perennes y complejas.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-2 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/somosalfalfa.com.ar\/negocios-noticias\/wp-content\/uploads\/2026\/10\/IMG_3694-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" data-id=\"55151\" src=\"https:\/\/somosalfalfa.com.ar\/negocios-noticias\/wp-content\/uploads\/2026\/10\/IMG_3694-1024x683.jpg\" alt=\"\" class=\"wp-image-55151\" srcset=\"https:\/\/somosalfalfa.com.ar\/negocios-noticias\/wp-content\/uploads\/2026\/10\/IMG_3694-1024x683.jpg 1024w, https:\/\/somosalfalfa.com.ar\/negocios-noticias\/wp-content\/uploads\/2026\/10\/IMG_3694-300x200.jpg 300w, https:\/\/somosalfalfa.com.ar\/negocios-noticias\/wp-content\/uploads\/2026\/10\/IMG_3694-768x512.jpg 768w, https:\/\/somosalfalfa.com.ar\/negocios-noticias\/wp-content\/uploads\/2026\/10\/IMG_3694-1536x1024.jpg 1536w, https:\/\/somosalfalfa.com.ar\/negocios-noticias\/wp-content\/uploads\/2026\/10\/IMG_3694-2048x1365.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/somosalfalfa.com.ar\/negocios-noticias\/wp-content\/uploads\/2026\/10\/IMG_3699-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" data-id=\"55149\" src=\"https:\/\/somosalfalfa.com.ar\/negocios-noticias\/wp-content\/uploads\/2026\/10\/IMG_3699-1024x683.jpg\" alt=\"\" class=\"wp-image-55149\" srcset=\"https:\/\/somosalfalfa.com.ar\/negocios-noticias\/wp-content\/uploads\/2026\/10\/IMG_3699-1024x683.jpg 1024w, https:\/\/somosalfalfa.com.ar\/negocios-noticias\/wp-content\/uploads\/2026\/10\/IMG_3699-300x200.jpg 300w, https:\/\/somosalfalfa.com.ar\/negocios-noticias\/wp-content\/uploads\/2026\/10\/IMG_3699-768x512.jpg 768w, https:\/\/somosalfalfa.com.ar\/negocios-noticias\/wp-content\/uploads\/2026\/10\/IMG_3699-1536x1024.jpg 1536w, https:\/\/somosalfalfa.com.ar\/negocios-noticias\/wp-content\/uploads\/2026\/10\/IMG_3699-2048x1365.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n<\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Decisiones t\u00e1cticas: Preemergencia y experimentaci\u00f3n local<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">La elecci\u00f3n del momento de aplicaci\u00f3n es determinante para lograr eficacia sin fitotoxicidad:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Preemergencia:<\/strong> Permite evitar la competencia temprana, promover el desarrollo radicular y maximizar la densidad \u00fatil de la pastura.<\/li>\n\n\n\n<li><strong>Herbicidas de referencia:<\/strong> Ensayos locales presentados por el INTA (como el uso de <em>Flumetsulam<\/em> en preemergencia) demostraron que los lotes tratados con dosis plenas duplicaron la producci\u00f3n de materia seca al primer corte (1482 g MS\/m\u00b2) frente al testigo sin tratar (649 g MS\/m\u00b2), preservando un stand de 212 plantas\/m\u00b2.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Como conclusi\u00f3n, la especialista enfatiz\u00f3 que el monitoreo bot\u00e1nico sistem\u00e1tico y el uso de preemergentes ajustados al tipo de suelo son herramientas indispensables para garantizar el \u00e9xito productivo del alfalfar.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>La especialista Alejandra Ledda, del INTA Las Bre\u00f1as, analiz\u00f3 la gesti\u00f3n de malezas, las necesidades de la alfalfa y la importancia de la implantaci\u00f3n, momento clave para lograr una pastura de mayor calidad.<\/p>\n","protected":false},"author":10,"featured_media":55148,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"pmpro_default_level":"","_breakdance_hide_in_design_set":false,"_breakdance_tags":"","footnotes":""},"categories":[1812,4,5],"tags":[2327,153,227,358,176,192,158,762,1367,139,143,214],"class_list":["post-55146","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-expoalfa","category-forraje","category-heno","tag-alejandra-ledda","tag-alfalfa","tag-argentina","tag-exportacion","tag-forrajes","tag-heno","tag-inta","tag-inta-las-brenas","tag-malezas","tag-pasturas","tag-produccion","tag-siembra","pmpro-has-access"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Manejo de malezas en alfalfa: Claves desde la implantaci\u00f3n hasta el control qu\u00edmico - 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