{"id":5570,"date":"2026-08-19T16:07:06","date_gmt":"2026-08-19T16:07:06","guid":{"rendered":"https:\/\/fagro.mx\/blog\/?p=5570"},"modified":"2026-08-19T16:07:09","modified_gmt":"2026-08-19T16:07:09","slug":"antracnosis-y-oidio-en-la-recta-final-cuando-y-como-rotar-fungicidas","status":"publish","type":"post","link":"https:\/\/fagro.mx\/blog\/2026\/08\/19\/antracnosis-y-oidio-en-la-recta-final-cuando-y-como-rotar-fungicidas\/","title":{"rendered":"Antracnosis y oidio en la recta final: cu\u00e1ndo y c\u00f3mo rotar fungicidas"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">&#8220;El producto ya no me est\u00e1 funcionando&#8221; es una de las quejas m\u00e1s comunes que escuchamos en la recta final del ciclo, cuando la presi\u00f3n de <a href=\"https:\/\/fagro.mx\/blog\/2018\/09\/27\/biofungicidas\/\">antracnosis<\/a> y oidio suele ser m\u00e1s constante por la <a href=\"https:\/\/fagro.mx\/blog\/2024\/08\/28\/despues-de-la-tormenta-vienen-los-hongos\/\">humedad<\/a> y la carga de follaje acumulada. Casi siempre, el diagn\u00f3stico correcto no es que el producto haya fallado \u2014 es que se aplic\u00f3 el mismo modo de acci\u00f3n de forma repetida sin rotaci\u00f3n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Este art\u00edculo explica, en t\u00e9rminos pr\u00e1cticos, por qu\u00e9 ocurre la p\u00e9rdida aparente de efectividad, c\u00f3mo reconocer los primeros s\u00edntomas de antracnosis y oidio, y c\u00f3mo construir un calendario de rotaci\u00f3n que no deje ventanas abiertas antes de <a href=\"https:\/\/fagro.mx\/blog\/2024\/06\/14\/analisis-de-peligros-y-de-puntos-criticos-de-control-haccp-en-postcosecha-de-frutas-y-hortalizas-eliminalos-con-un-buen-sistema-de-inocuidad\/\">cosecha<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Por qu\u00e9 un fungicida &#8220;deja de funcionar&#8221;<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ning\u00fan <a href=\"https:\/\/fagro.mx\/blog\/2024\/10\/09\/fungicidas-protectantes-para-el-manejo-de-enfermedades-por-hongos-en-las-plantas\/\">fungicida<\/a> mata al 100% de la poblaci\u00f3n de un pat\u00f3geno en cada aplicaci\u00f3n. Siempre existe una fracci\u00f3n de individuos con menor sensibilidad natural al modo de acci\u00f3n del producto. Cuando se aplica el mismo fungicida de forma repetida, esos individuos menos sensibles sobreviven cada aplicaci\u00f3n mientras los sensibles mueren \u2014 y con el tiempo, la poblaci\u00f3n que queda es predominantemente resistente.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Esto no es un defecto del producto: es selecci\u00f3n natural aplicada a una poblaci\u00f3n de <a href=\"https:\/\/fagro.mx\/blog\/2024\/05\/17\/manejo-organico-de-hongos-que-atacan-a-plantas\/\">hongos<\/a> bajo presi\u00f3n constante. La soluci\u00f3n no es aumentar la dosis (lo que acelera la selecci\u00f3n de resistencia) ni cambiar de marca dentro del mismo modo de acci\u00f3n \u2014 es rotar entre modos de acci\u00f3n genuinamente distintos.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"572\" src=\"https:\/\/fagro.mx\/blog\/wp-content\/uploads\/2026\/08\/Gemini_Generated_Image_kbl99okbl99okbl9-1024x572.jpg\" alt=\"Comparaci\u00f3n visual de una hoja tratada repetidamente con el mismo fungicida vs una hoja con programa rotado.\" class=\"wp-image-5572\" srcset=\"https:\/\/fagro.mx\/blog\/wp-content\/uploads\/2026\/08\/Gemini_Generated_Image_kbl99okbl99okbl9-1024x572.jpg 1024w, https:\/\/fagro.mx\/blog\/wp-content\/uploads\/2026\/08\/Gemini_Generated_Image_kbl99okbl99okbl9-300x167.jpg 300w, https:\/\/fagro.mx\/blog\/wp-content\/uploads\/2026\/08\/Gemini_Generated_Image_kbl99okbl99okbl9-768x429.jpg 768w, https:\/\/fagro.mx\/blog\/wp-content\/uploads\/2026\/08\/Gemini_Generated_Image_kbl99okbl99okbl9-1536x857.jpg 1536w, https:\/\/fagro.mx\/blog\/wp-content\/uploads\/2026\/08\/Gemini_Generated_Image_kbl99okbl99okbl9-2048x1143.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">Comparaci\u00f3n visual de una hoja tratada repetidamente con el mismo fungicida vs una hoja con programa rotado.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Reconocer antracnosis y oidio a tiempo<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">La antracnosis se manifiesta primero como peque\u00f1as lesiones hundidas y de bordes definidos, a menudo con un patr\u00f3n conc\u00e9ntrico sutil, t\u00edpicamente en fruto que a\u00fan est\u00e1 verde o en las primeras etapas de coloraci\u00f3n. El hongo puede colonizar el tejido semanas antes de que la lesi\u00f3n sea visible, lo que hace que la prevenci\u00f3n sea m\u00e1s efectiva que la correcci\u00f3n tard\u00eda.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">El oidio, por su parte, se identifica por un polvo blanco-gris\u00e1ceo sobre la superficie de hojas y, en casos avanzados, sobre el fruto. A diferencia de la antracnosis, sus s\u00edntomas son visibles relativamente pronto \u2014 pero su avance sobre la superficie <a href=\"https:\/\/fagro.mx\/blog\/2024\/08\/27\/hongos-que-proliferan-en-el-area-foliar\/\">foliar<\/a> reduce la fotos\u00edntesis disponible justo cuando la planta m\u00e1s energ\u00eda necesita para sostener fruto ya cargado.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"559\" src=\"https:\/\/fagro.mx\/blog\/wp-content\/uploads\/2026\/08\/Gemini_Generated_Image_7ze73u7ze73u7ze7-1024x559.jpg\" alt=\"Detalle macro de lesi\u00f3n temprana de antracnosis en fruto verde.\" class=\"wp-image-5573\" srcset=\"https:\/\/fagro.mx\/blog\/wp-content\/uploads\/2026\/08\/Gemini_Generated_Image_7ze73u7ze73u7ze7-1024x559.jpg 1024w, https:\/\/fagro.mx\/blog\/wp-content\/uploads\/2026\/08\/Gemini_Generated_Image_7ze73u7ze73u7ze7-300x164.jpg 300w, https:\/\/fagro.mx\/blog\/wp-content\/uploads\/2026\/08\/Gemini_Generated_Image_7ze73u7ze73u7ze7-768x419.jpg 768w, https:\/\/fagro.mx\/blog\/wp-content\/uploads\/2026\/08\/Gemini_Generated_Image_7ze73u7ze73u7ze7-1536x838.jpg 1536w, https:\/\/fagro.mx\/blog\/wp-content\/uploads\/2026\/08\/Gemini_Generated_Image_7ze73u7ze73u7ze7-2048x1117.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">Detalle macro de lesi\u00f3n temprana de antracnosis en fruto verde.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">C\u00f3mo construir la rotaci\u00f3n: dos modos de acci\u00f3n, un calendario<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Un programa de rotaci\u00f3n efectivo alterna entre productos con mecanismos de acci\u00f3n genuinamente distintos, respetando el intervalo de aplicaci\u00f3n indicado en cada etiqueta. Un fungicida sist\u00e9mico de triple mecanismo (sist\u00e9mico + contacto + inductor de resistencia) y un fungicida de contacto con tres activos distintos representan dos frentes separados: el hongo que desarrolla tolerancia a uno no tiene autom\u00e1ticamente tolerancia al otro.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Fagro ofrece <strong><a href=\"https:\/\/fagro.mx\/productos\/blindax\" target=\"_blank\" rel=\"noreferrer noopener\">Blindax<\/a><\/strong> (sist\u00e9mico de triple mecanismo, sin l\u00edmite de carencia \u2014 aplicable hasta cerca de cosecha) y <strong><a href=\"https:\/\/fagro.mx\/productos\/scoper-mz\" target=\"_blank\" rel=\"noreferrer noopener\">Scoper MZ<\/a><\/strong> (contacto con azufre, cobre y mancozeb) como las dos piezas de esta rotaci\u00f3n. <strong><a href=\"https:\/\/fagro.mx\/productos\/scoper-mz\" target=\"_blank\" rel=\"noreferrer noopener\">Scoper MZ<\/a><\/strong> suma espectro hacia tiz\u00f3n temprano, tiz\u00f3n tard\u00edo y <a href=\"https:\/\/fagro.mx\/blog\/2024\/08\/27\/despues-de-la-tormenta-vienen-los-hongos-2\/\">alternaria<\/a>, y es la opci\u00f3n cuando la presi\u00f3n de enfermedad es alta. Alternarlos seg\u00fan la presi\u00f3n de cada semana, en lugar de repetir uno solo por comodidad operativa, es lo que mantiene efectivo el programa completo.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Cu\u00e1ndo intensificar la rotaci\u00f3n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">La presi\u00f3n de antracnosis y oidio no es constante durante todo el ciclo. Humedad relativa alta, <a href=\"https:\/\/fagro.mx\/blog\/2024\/10\/07\/fungicidas-organicos-a-base-de-extractos-vegetales-para-el-control-efectivo-de-enfermedades-causadas-por-hongos-en-las-plantas\/\">lluvias<\/a> frecuentes, riego por aspersi\u00f3n y densidad de follaje son las condiciones que m\u00e1s aceleran su <a href=\"https:\/\/fagro.mx\/blog\/2024\/07\/01\/como-afecta-el-estres-a-cada-etapa-de-desarrollo-del-cultivo\/\">desarrollo<\/a>. En esas semanas, acortar el intervalo entre aplicaciones (dentro de lo indicado en cada etiqueta) y mantener la alternancia estricta es m\u00e1s importante que en semanas de menor presi\u00f3n.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusi\u00f3n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Cuando un fungicida parece dejar de funcionar, la pregunta correcta no es &#8220;\u00bfqu\u00e9 otro producto pruebo?&#8221; sino &#8220;\u00bfestoy rotando modos de acci\u00f3n?&#8221;. Un programa que alterna <strong><a href=\"https:\/\/fagro.mx\/productos\/blindax\" target=\"_blank\" rel=\"noreferrer noopener\">Blindax<\/a><\/strong> y <strong><a href=\"https:\/\/fagro.mx\/productos\/scoper-mz\" target=\"_blank\" rel=\"noreferrer noopener\">Scoper MZ<\/a><\/strong> seg\u00fan la presi\u00f3n real de la semana mantiene el control efectivo durante toda la recta final del ciclo.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Revisa tu calendario de rotaci\u00f3n esta semana. Adquiere <strong><a href=\"https:\/\/fagro.mx\/productos\/blindax\" target=\"_blank\" rel=\"noreferrer noopener\">Blindax<\/a><\/strong> en <strong><a href=\"https:\/\/fagro.mx\/productos\/blindax\" target=\"_blank\" rel=\"noreferrer noopener\">fagro.mx\/productos\/blindax<\/a><\/strong> o <strong><a href=\"https:\/\/fagro.mx\/productos\/scoper-mz\" target=\"_blank\" rel=\"noreferrer noopener\">Scoper MZ<\/a><\/strong> en <strong><a href=\"https:\/\/fagro.mx\/productos\/scoper-mz\" target=\"_blank\" rel=\"noreferrer noopener\">fagro.mx\/productos\/scoper-mz<\/a><\/strong>. Ll\u00e1manos al 844-350-7222.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Fuentes t\u00e9cnicas consultadas<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Fungicide Resistance Action Committee (FRAC), &#8220;FRAC Code List&#8221;: <a href=\"https:\/\/www.frac.info\/\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/www.frac.info\/<\/a><\/li>\n\n\n\n<li>Cornell University, &#8220;Fungicide Resistance Management Guidelines&#8221;: <a href=\"https:\/\/cropandpestguides.cce.cornell.edu\/\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/cropandpestguides.cce.cornell.edu\/<\/a><\/li>\n\n\n\n<li>University of Florida IFAS, &#8220;Anthracnose of vegetables&#8221;: <a href=\"https:\/\/edis.ifas.ufl.edu\/topics\/plant-pathology\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/edis.ifas.ufl.edu\/topics\/plant-pathology<\/a><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>&#8220;El producto ya no me est\u00e1 funcionando&#8221; es una de las quejas m\u00e1s comunes que escuchamos en la recta final del ciclo, cuando la presi\u00f3n de antracnosis y oidio suele ser m\u00e1s constante por la humedad y la carga de follaje acumulada. Casi siempre, el diagn\u00f3stico correcto no es que el producto haya fallado \u2014 &#8230; <a title=\"Antracnosis y oidio en la recta final: cu\u00e1ndo y c\u00f3mo rotar fungicidas\" class=\"read-more\" href=\"https:\/\/fagro.mx\/blog\/2026\/08\/19\/antracnosis-y-oidio-en-la-recta-final-cuando-y-como-rotar-fungicidas\/\" aria-label=\"Leer m\u00e1s sobre Antracnosis y oidio en la recta final: cu\u00e1ndo y c\u00f3mo rotar fungicidas\">Leer m\u00e1s<\/a><\/p>\n","protected":false},"author":1,"featured_media":5571,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-5570","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sin-categoria"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Antracnosis y oidio en la recta final: cu\u00e1ndo y c\u00f3mo rotar fungicidas - Blog de Fagro<\/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:\/\/fagro.mx\/blog\/2026\/08\/19\/antracnosis-y-oidio-en-la-recta-final-cuando-y-como-rotar-fungicidas\/\" \/>\n<meta property=\"og:locale\" content=\"es_MX\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Antracnosis y oidio en la recta final: cu\u00e1ndo y c\u00f3mo rotar fungicidas - Blog de Fagro\" \/>\n<meta property=\"og:description\" content=\"&#8220;El producto ya no me est\u00e1 funcionando&#8221; es una de las quejas m\u00e1s comunes que escuchamos en la recta final del ciclo, cuando la presi\u00f3n de antracnosis y oidio suele ser m\u00e1s constante por la humedad y la carga de follaje acumulada. 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