{"id":28707,"date":"2012-04-23T00:00:00","date_gmt":"2012-04-23T04:00:00","guid":{"rendered":"http:\/\/www.farmchemicalsinternational.com\/2012\/04\/23\/one-third-of-us-farmers-to-add-herbicide-sites-of-action-in-2012\/"},"modified":"2014-11-21T09:38:56","modified_gmt":"2014-11-21T14:38:56","slug":"one-third-of-us-farmers-to-add-herbicide-sites-of-action-in-2012","status":"publish","type":"post","link":"https:\/\/www.agribusinessglobal.com\/pt\/agrochemicals\/herbicides\/one-third-of-us-farmers-to-add-herbicide-sites-of-action-in-2012\/","title":{"rendered":"Um ter\u00e7o dos agricultores dos EUA adicionar\u00e3o locais de a\u00e7\u00e3o de herbicidas em 2012"},"content":{"rendered":"<p>Mais de um ter\u00e7o dos agricultores dos EUA que responderam a uma pesquisa conduzida pela BASF disseram que planejam adicionar v\u00e1rios locais de a\u00e7\u00e3o de herbicidas este ano em resposta \u00e0 dissemina\u00e7\u00e3o de ervas daninhas resistentes ao glifosato.<\/p>\n<p>Mais de 50% de agricultores dos EUA pesquisados reconheceram a exist\u00eancia de ervas daninhas resistentes ao glifosato em seus campos, e muitos culparam a resist\u00eancia pela redu\u00e7\u00e3o dos rendimentos, de acordo com a BASF. Mesmo agricultores que n\u00e3o viram resist\u00eancia ao glifosato em seus campos disseram que ajustariam seus programas de controle de ervas daninhas.<\/p>\n<p>\u201cIsso indica que os agricultores entendem que os desafios atuais de controle de ervas daninhas exigem o uso de uma abordagem de gerenciamento mais abrangente\u201d, disse o Dr. Dan Westberg, Gerente de Mercado T\u00e9cnico da BASF, em uma declara\u00e7\u00e3o. \u201cO uso repetido de uma \u00fanica qu\u00edmica \u00e9 a principal raz\u00e3o pela qual muitos desenvolveram popula\u00e7\u00f5es de ervas daninhas resistentes.\u201d<\/p>\n<p>Mais de 80% dos entrevistados disseram que estariam dispostos a investir d\u00f3lares adicionais para controlar ervas daninhas resistentes. A Weed Science Society of America confirmou 13 esp\u00e9cies diferentes de ervas daninhas resistentes ao glifosato que roubam lucros em 28 estados dos EUA.<\/p>\n<p>Muitos entrevistados tamb\u00e9m disseram que aplicariam um herbicida de pr\u00e9-emerg\u00eancia antes ou no plantio para uma base de controle de ervas daninhas, bem como adicionariam misturas de tanque \u00e0s suas aplica\u00e7\u00f5es posteriores, disse a BASF. Cerca de um ter\u00e7o dos entrevistados disseram que trabalhariam com um consultor para planejar seus programas.<\/p>\n<p class=\"subhead\">Mudan\u00e7a dr\u00e1stica desde 2010<\/p>\n<p>Em 2010, uma pesquisa da BASF perguntou aos clientes se eles achavam que a resist\u00eancia a herbicidas impacta a produtividade. Apenas 23% respondeu \u201csim\u201d.<\/p>\n<p>Isso marca uma mudan\u00e7a dr\u00e1stica em rela\u00e7\u00e3o \u00e0 pesquisa mais recente, que perguntou aos agricultores quanto as ervas daninhas resistentes ao impacto tiveram em suas produ\u00e7\u00f5es em 2011: desta vez, o 73% disse que houve pelo menos algum impacto na produ\u00e7\u00e3o.<\/p>\n<p>No entanto, nem todo fazendeiro concorda que a resist\u00eancia \u00e9 uma preocupa\u00e7\u00e3o imediata. Dezesseis por cento dos entrevistados disseram que n\u00e3o gastariam mais nada para controlar ervas daninhas resistentes. Um ter\u00e7o dos entrevistados disse que n\u00e3o acredita que ervas daninhas resistentes sequer impactem seu retorno sobre o investimento.<\/p>\n<p>A BASF citou o cientista especializado em ervas daninhas da Universidade do Tennessee, Dr. Larry Steckel, que disse que as ervas daninhas resistentes ao glifosato causaram aos agricultores do Tennessee um golpe financeiro de 1TP a 1T200 milh\u00f5es.<\/p>\n<p>\u201cE isso \u00e9 muito conservador\u201d, disse Steckel, \u201cporque n\u00e3o est\u00e1 contando os campos que foram arados e n\u00e3o colhidos. Teve um impacto enorme, muito acima do que eu pensava ao entrar nisso h\u00e1 seis, sete anos.\u201d<\/p>\n<p>Cientistas de ervas daninhas recomendam que os cultivadores adotem um programa de manejo de ervas daninhas mais abrangente para prolongar a efic\u00e1cia do glifosato. Isso inclui o emprego de m\u00faltiplos locais de a\u00e7\u00e3o de herbicidas na esta\u00e7\u00e3o de crescimento, disse Westberg.<\/p>\n<p><em>Fonte: BASF, editado por Jaclyn Sindrich, editora-chefe<\/em><\/p>","protected":false},"excerpt":{"rendered":"<p>Mais de um ter\u00e7o dos agricultores dos EUA que responderam a uma pesquisa conduzida pela BASF disseram que planejam adicionar v\u00e1rios herbicidas\u2026<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[19],"tags":[],"class_list":["post-28707","post","type-post","status-publish","format-standard","hentry","category-herbicides"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>One-Third of US Farmers to Add Herbicide Sites of Action in 2012 - AgriBusiness Global<\/title>\n<meta name=\"description\" content=\"More than one-third of US farmers responding to a survey conducted by BASF said they plan to add multiple herbicide sites of action this year in response\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.agribusinessglobal.com\/pt\/agrochemicals\/herbicides\/one-third-of-us-farmers-to-add-herbicide-sites-of-action-in-2012\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"One-Third of US Farmers to Add Herbicide Sites of Action in 2012 - 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