{"id":824,"date":"2025-07-23T02:52:59","date_gmt":"2025-07-23T02:52:59","guid":{"rendered":"https:\/\/conectagrao.com.br\/blog\/?p=824"},"modified":"2025-08-07T06:16:55","modified_gmt":"2025-08-07T06:16:55","slug":"spodoptera-frugiperda-ameaca-ao-milho-e-desafios-no-controle","status":"publish","type":"post","link":"https:\/\/conectagrao.com.br\/blog\/spodoptera-frugiperda-ameaca-ao-milho-e-desafios-no-controle\/","title":{"rendered":"Spodoptera frugiperda: amea\u00e7a ao milho e desafios no controle"},"content":{"rendered":"\n<p>A <strong>Spodoptera frugiperda<\/strong>, popularmente chamada de <strong>lagarta-do-cartucho<\/strong>, est\u00e1 entre as pragas mais destrutivas da agricultura brasileira. Devido \u00e0 sua ampla distribui\u00e7\u00e3o geogr\u00e1fica e alta capacidade de adapta\u00e7\u00e3o, ela causa perdas bilion\u00e1rias, especialmente nas lavouras de milho. Al\u00e9m disso, a praga tamb\u00e9m atinge culturas como soja, sorgo e algod\u00e3o, ampliando seus impactos sobre o setor agr\u00edcola.<\/p>\n\n\n\n<p>Contudo, nas \u00faltimas safras, um novo obst\u00e1culo tem se destacado: a crescente <strong>resist\u00eancia da Spodoptera frugiperda<\/strong> a inseticidas qu\u00edmicos e \u00e0s prote\u00ednas Bt presentes em cultivares transg\u00eanicos. Este fen\u00f4meno tem tornado o manejo da praga cada vez mais complexo e dispendioso.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/conectagrao.com.br\/blog\/wp-content\/uploads\/2025\/07\/lagarta-militar-1-1024x576.jpg\" alt=\"\" class=\"wp-image-827\" style=\"width:552px;height:auto\" srcset=\"https:\/\/conectagrao.com.br\/blog\/wp-content\/uploads\/2025\/07\/lagarta-militar-1-1024x576.jpg 1024w, https:\/\/conectagrao.com.br\/blog\/wp-content\/uploads\/2025\/07\/lagarta-militar-1-300x169.jpg 300w, https:\/\/conectagrao.com.br\/blog\/wp-content\/uploads\/2025\/07\/lagarta-militar-1-768x432.jpg 768w, https:\/\/conectagrao.com.br\/blog\/wp-content\/uploads\/2025\/07\/lagarta-militar-1-1536x864.jpg 1536w, https:\/\/conectagrao.com.br\/blog\/wp-content\/uploads\/2025\/07\/lagarta-militar-1.jpg 1920w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">Spodoptera frugiperda<\/figcaption><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\">Entendendo a resist\u00eancia<\/h3>\n\n\n\n<p>De modo geral, a resist\u00eancia ocorre quando indiv\u00edduos da popula\u00e7\u00e3o da praga sobrevivem repetidamente a aplica\u00e7\u00f5es de inseticidas ou ao consumo de plantas transg\u00eanicas. Como consequ\u00eancia, essas lagartas se reproduzem, disseminando genes resistentes e tornando o controle menos eficaz com o passar do tempo.<\/p>\n\n\n\n<p>Atualmente, j\u00e1 foram detectadas popula\u00e7\u00f5es da <strong>Spodoptera frugiperda<\/strong> resistentes a:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Inseticidas qu\u00edmicos<\/strong>, como lambda-cialotrina, clorantraniliprole e espinetoram;<\/li>\n\n\n\n<li><strong>Prote\u00ednas Bt<\/strong>, como Cry1F e Cry1Ab, amplamente utilizadas no milho Bt.<\/li>\n<\/ul>\n\n\n\n<p>Portanto, quanto mais se utiliza essas ferramentas de forma cont\u00ednua e sem altern\u00e2ncia de mecanismos de a\u00e7\u00e3o, mais rapidamente a resist\u00eancia se desenvolve.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Como isso acontece?<\/h3>\n\n\n\n<p>Em primeiro lugar, o uso repetitivo de produtos com o mesmo <strong>modo de a\u00e7\u00e3o<\/strong> favorece a sele\u00e7\u00e3o natural de indiv\u00edduos resistentes. Em segundo lugar, a aus\u00eancia de pr\u00e1ticas complementares, como o ref\u00fagio estruturado em lavouras Bt, agrava ainda mais o problema.<\/p>\n\n\n\n<p>Ou seja, ao n\u00e3o manter \u00e1reas com plantas convencionais (milho n\u00e3o-Bt), o produtor impede a dilui\u00e7\u00e3o dos genes resistentes, contribuindo para a <strong>perda de efic\u00e1cia das tecnologias dispon\u00edveis<\/strong>.<\/p>\n\n\n\n<p>Al\u00e9m disso, o plantio cont\u00ednuo da mesma cultura sem rota\u00e7\u00e3o contribui para a press\u00e3o seletiva sobre a popula\u00e7\u00e3o da Spodoptera frugiperda, tornando o ambiente mais favor\u00e1vel \u00e0 sua multiplica\u00e7\u00e3o.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Impactos no campo<\/h3>\n\n\n\n<p>Como resultado desse avan\u00e7o da resist\u00eancia, os produtores enfrentam <strong>custos operacionais elevados<\/strong>, aumento do n\u00famero de pulveriza\u00e7\u00f5es e, consequentemente, maior risco de contamina\u00e7\u00e3o ambiental. Ademais, o uso excessivo de qu\u00edmicos desequilibra o ecossistema, afetando <strong>inimigos naturais da praga<\/strong>, como parasitoides e predadores ben\u00e9ficos.<\/p>\n\n\n\n<p>Isso compromete n\u00e3o apenas a sa\u00fade do solo e da fauna auxiliar, mas tamb\u00e9m a sustentabilidade da produ\u00e7\u00e3o a m\u00e9dio e longo prazo.<\/p>\n\n\n\n<div style=\"border: 2px solid #ff9800; border-radius: 10px; padding: 20px; background: #ffffff; box-shadow: 0 4px 12px rgba(0,0,0,0.1); font-family: Arial, sans-serif; width: 100%; max-width: 100%; margin: 20px 0; text-align: center; box-sizing: border-box;\">\n  \n  <h3 style=\"color: #ff9800; font-size: 24px; margin-top: 0; margin-bottom: 15px;\">\n    <span style=\"display: none;\" class=\"whatsapp-icon\">\n      <img decoding=\"async\" src=\"https:\/\/e7.pngegg.com\/pngimages\/347\/373\/png-clipart-computer-icons-whatsapp-whatsapp-text-trademark-thumbnail.png\" alt=\"WhatsApp\" style=\"width: 40px; height: 40px; border-radius: 50%; object-fit: cover;\">\n    <\/span>\n  <\/h3>\n  \n  <div style=\"display: flex; justify-content: center; align-items: center; flex-wrap: wrap; margin-bottom: 10px;\">\n    <div style=\"text-align: center; margin-right: 10px;\"> <!-- Reduzido o margin-right -->\n      <p style=\"font-size: 16px; color: #333; line-height: 1.5; margin: 0;\">\n        \ud83d\udcf0 Not\u00edcias &#038; Mercado | \ud83d\udd14 Novidades <span class=\"desktop-separator\">|<\/span>\n      <\/p>\n    <\/div>\n    <div style=\"text-align: center;\">\n      <p style=\"font-size: 16px; color: #333; line-height: 1.5; margin: 0;\">\n        \u26c5 Clima | \ud83d\ude80 Tecnologia | \ud83d\udcf1 Blog\n      <\/p>\n    <\/div>\n  <\/div>\n  \n  <a href=\"https:\/\/www.whatsapp.com\/channel\/0029VaLMT22GOj9f6eVOpJ0N\" target=\"_blank\" style=\"background: #25D366; color: #fff; padding: 10px 20px; font-size: 16px; font-weight: bold; text-decoration: none; border-radius: 30px; display: inline-block; transition: all 0.3s; position: relative;\">\n    <img decoding=\"async\" src=\"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/6\/6b\/WhatsApp.svg\" alt=\"WhatsApp\" style=\"width: 20px; height: 20px; vertical-align: middle; margin-right: 5px;\">\n    Entrar no Canal\n  <\/a>\n  \n  <p style=\"font-size: 12px; color: #666; margin-top: 15px; font-weight: bold;\">\n    Sua conex\u00e3o com as melhores informa\u00e7\u00f5es do agroneg\u00f3cio!\n  <\/p>\n<\/div>\n\n<style>\n@media (max-width: 768px) {\n  .desktop-separator {\n    display: none; \/* Ocultar o separador \"|\" em dispositivos m\u00f3veis *\/\n  }\n  h3 {\n    font-size: 20px; \/* Diminuir o tamanho da fonte do t\u00edtulo em dispositivos m\u00f3veis *\/\n  }\n  p {\n    font-size: 14px; \/* Diminuir o tamanho da fonte dos par\u00e1grafos em dispositivos m\u00f3veis *\/\n  }\n  a {\n    font-size: 14px; \/* Diminuir o tamanho da fonte do bot\u00e3o em dispositivos m\u00f3veis *\/\n    padding: 8px 15px; \/* Ajustar o padding do bot\u00e3o em dispositivos m\u00f3veis *\/\n  }\n}\n<\/style>\n\n\n\n\n<h3 class=\"wp-block-heading\">Solu\u00e7\u00f5es: o Manejo Integrado \u00e9 essencial<\/h3>\n\n\n\n<p>Diante desse cen\u00e1rio, o <strong>Manejo Integrado de Pragas (MIP)<\/strong> surge como o caminho mais eficaz e sustent\u00e1vel. Em vez de depender exclusivamente de defensivos qu\u00edmicos ou biotecnologias isoladas, o MIP prop\u00f5e um conjunto de pr\u00e1ticas complementares, com base no monitoramento e na tomada de decis\u00e3o t\u00e9cnica.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">1. Monitoramento constante<\/h4>\n\n\n\n<p>Antes de qualquer interven\u00e7\u00e3o, \u00e9 fundamental conhecer o n\u00edvel de infesta\u00e7\u00e3o da lavoura. O uso de <strong>armadilhas e amostragens sistem\u00e1ticas<\/strong> permite identificar precocemente a presen\u00e7a da <strong>Spodoptera frugiperda<\/strong>, possibilitando a ado\u00e7\u00e3o de medidas no momento mais adequado.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">2. Rota\u00e7\u00e3o de inseticidas<\/h4>\n\n\n\n<p>Al\u00e9m disso, a altern\u00e2ncia de princ\u00edpios ativos com <strong>modos de a\u00e7\u00e3o diferentes<\/strong> evita que a praga desenvolva resist\u00eancia rapidamente. Essa estrat\u00e9gia deve ser aplicada com rigor, seguindo as recomenda\u00e7\u00f5es agron\u00f4micas e respeitando os intervalos entre aplica\u00e7\u00f5es.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">3. Preserva\u00e7\u00e3o de inimigos naturais<\/h4>\n\n\n\n<p>Outro ponto fundamental \u00e9 a <strong>manuten\u00e7\u00e3o do equil\u00edbrio biol\u00f3gico<\/strong>. Para isso, deve-se evitar pulveriza\u00e7\u00f5es desnecess\u00e1rias e priorizar produtos seletivos, que preservem organismos ben\u00e9ficos ao controle natural da Spodoptera frugiperda.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">4. Ref\u00fagio estruturado nas lavouras Bt<\/h4>\n\n\n\n<p>A implanta\u00e7\u00e3o do <strong>ref\u00fagio<\/strong> \u2014 ao menos 10% da \u00e1rea plantada com milho convencional \u2014 \u00e9 essencial para reduzir a press\u00e3o de sele\u00e7\u00e3o. Portanto, essa pr\u00e1tica deve ser tratada como parte integrante do sistema produtivo e n\u00e3o como uma recomenda\u00e7\u00e3o opcional.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">5. Cultivares Bt com m\u00faltiplas prote\u00ednas<\/h4>\n\n\n\n<p>Atualmente, o uso de h\u00edbridos com <strong>empilhamento de prote\u00ednas Bt<\/strong>, como Vip3Aa, oferece maior efic\u00e1cia e contribui para retardar o desenvolvimento da resist\u00eancia. No entanto, sua efici\u00eancia tamb\u00e9m depende do uso combinado com as outras pr\u00e1ticas citadas.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Conclus\u00e3o<\/h3>\n\n\n\n<p>Diante de todos esses fatores, \u00e9 evidente que o desafio n\u00e3o est\u00e1 apenas na praga, mas sim na forma como ela vem sendo manejada. A resist\u00eancia da <strong>Spodoptera frugiperda<\/strong> \u00e9 um alerta claro: <strong>mais aplica\u00e7\u00f5es n\u00e3o resolvem \u2014 o que resolve \u00e9 aplicar com intelig\u00eancia<\/strong>.<\/p>\n\n\n\n<p>Portanto, investir em capacita\u00e7\u00e3o t\u00e9cnica, planejamento e pr\u00e1ticas sustent\u00e1veis deixou de ser uma escolha e passou a ser uma exig\u00eancia. Afinal, a <strong>produtividade da lavoura e a durabilidade das tecnologias agr\u00edcolas<\/strong> dependem diretamente de estrat\u00e9gias bem conduzidas, coordenadas e respons\u00e1veis.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Refer\u00eancias :<\/strong><\/h3>\n\n\n\n<p>BRASIL. Minist\u00e9rio da Agricultura, Pecu\u00e1ria e Abastecimento. <strong>Lagarta-do-cartucho (Spodoptera frugiperda)<\/strong>. Dispon\u00edvel em: <a>https:\/\/www.gov.br\/agricultura\/pt-br\/assuntos\/sanidade-vegetal\/pragas\/quarentenarias\/spodoptera-frugiperda<\/a>. Acesso em: 21 jul. 2025.<\/p>\n\n\n\n<p>COSTA, E. N. et al. <strong>Manejo da lagarta-do-cartucho na cultura do milho<\/strong>. Sete Lagoas: Embrapa Milho e Sorgo, 2019. 24 p. Dispon\u00edvel em: <a>https:\/\/www.embrapa.br\/busca-de-publicacoes\/-\/publicacao\/1111111<\/a>. Acesso em: 21 jul. 2025.<\/p>\n\n\n\n<p>SALVADORI, J. R. et al. <strong>Pragas da cultura do milho: identifica\u00e7\u00e3o e controle<\/strong>. Passo Fundo: Embrapa Trigo, 2016. 60 p.<\/p>\n\n\n\n<p>Escrito por: Kao\u00ea Rauch &#8211; equipe ConectaGr\u00e3o<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A lagarta-do-cartucho (Spodoptera frugiperda) \u00e9 uma das principais pragas da cultura do milho no Brasil. Este artigo aborda suas caracter\u00edsticas, ciclo biol\u00f3gico, os danos causados \u00e0 lavoura e as estrat\u00e9gias mais eficazes para seu manejo, com destaque para o controle biol\u00f3gico e o manejo integrado de pragas.<\/p>\n","protected":false},"author":2,"featured_media":825,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","_uag_custom_page_level_css":"","footnotes":""},"categories":[1,31],"tags":[],"class_list":["post-824","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-pragas"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Spodoptera frugiperda: amea\u00e7a ao milho e desafios no controle - ConectaGr\u00e3o<\/title>\n<meta name=\"description\" content=\"Spodoptera frugiperda ataca o milho, reduz a produtividade e exige manejo eficaz. 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