{"id":178581,"date":"2014-05-26T20:27:45","date_gmt":"2014-05-26T23:27:45","guid":{"rendered":"https:\/\/www.trapp.com.br\/mancha-parda\/"},"modified":"2024-11-08T10:31:24","modified_gmt":"2024-11-08T13:31:24","slug":"mancha-parda","status":"publish","type":"post","link":"https:\/\/www.trapp.com.br\/en\/mancha-parda\/","title":{"rendered":"Mancha-Parda"},"content":{"rendered":"
segunda, 26 de maio de 2014<\/span><\/div>\n
\n

Por Raquel Patro<\/p>\n

A mancha-parda \u00e9 bastante conhecida na regi\u00e3o sul do Brasil. \u00c9 uma doen\u00e7a causada pelos fungos do g\u00eanero\u00a0Bipolaris<\/em>\u00a0e infecta principalmente gram\u00edneas. Estes fungos causam danos em arroz, coqueiro, pastagens, girassol, milho, c\u00f4co, lupino, p\u00e2ndano, confete, d\u00e1lia, entre tantas outras plantas. As infec\u00e7\u00f5es s\u00e3o mais acentuadas em regi\u00f5es tropicais, embora estes fungos sejam cosmopolitas.<\/p>\n

As les\u00f5es normalmente s\u00e3o manchas marrom-escuras em folhas, caules e gr\u00e3os sendo mais comumente encontradas nas folhas. Estas manchas s\u00e3o redondas ou circulares, tendo o centro mais claro e acinzentado. Na regi\u00e3o externa \u00e0s manchas, caracteriza-se um halo amarelo-claro. Em casos extremos, as manchas podem cobrir at\u00e9 a metade da \u00e1rea foliar. As infec\u00e7\u00f5es ocorrem principalmente na germina\u00e7\u00e3o e no florescimento e s\u00e3o de dif\u00edcil controle.<\/p>\n

A dispers\u00e3o destes fungos ocorre prioritariamente devido \u00e0 a\u00e7\u00e3o do vento e, em menor escala atrav\u00e9s de sementes e mudas infectadas. Al\u00e9m disso, em pequenas dist\u00e2ncias, gostas de chuva e\/ou irriga\u00e7\u00e3o podem servir como meio de transporte aos esporos, infectando plantas pr\u00f3ximas ao foco inicial. As condi\u00e7\u00f5es favor\u00e1veis ao desenvolvimento destes fungos s\u00e3o temperaturas amenas associadas \u00e0 alta umidade relativa do ar e molhamento frequentes. Al\u00e9m do mais, plantas com defici\u00eancia nutricional ou h\u00eddrica s\u00e3o mais propensas a ficar doentes.<\/p>\n

O controle \u00e9 realizado com aplica\u00e7\u00e3o de fungicidas, como a calda bordalesa, mas nunca de forma curativa e sim, preventiva visto que altas infec\u00e7\u00f5es s\u00e3o praticamente imposs\u00edveis de controlar. Em pequenos cultivos ou jardins ornamentais, recomenda-se principalmente a\u00e7\u00f5es que evitem o estabelecimento e dissemina\u00e7\u00e3o da doen\u00e7a, como aquisi\u00e7\u00e3o de sementes, mudas e plantas adultas livres de doen\u00e7as, advindas de comerciantes confi\u00e1veis e preferir variedades, se dispon\u00edveis, com toler\u00e2ncia conhecida \u00e0 doen\u00e7a. Ainda, manter as plantas podadas para que sempre haja ventila\u00e7\u00e3o e a \u00e1gua de irriga\u00e7\u00e3o n\u00e3o permane\u00e7a empo\u00e7ada nas folhas, regulando tanto a temperatura como a umidade. A pr\u00f3pria irriga\u00e7\u00e3o sempre que poss\u00edvel deve ser efetuada sobre o solo ou substrato e n\u00e3o sobre as folhas. Outro fator importante \u00e9 a nutri\u00e7\u00e3o que afeta a fisiologia das plantas. Quando bem nutridas, as defesas dos vegetais em geral contra pat\u00f3genos como\u00a0Bipolaris\u00a0<\/em>s\u00e3o mais eficientes.<\/p>\n

Nome Cient\u00edfico: Bipolaris spp., Cochliobolus miyabeanus
\nNomes Populares: Mancha-foliar, Mancha-marrom, Mancha-parda
\nOrdem: Pleosporales
\nClasse: Dothideomycetes
\nFilo: Ascomycota
\nReino: Fungi
\nPartes Afetadas: Caule, Folhas, Frutos
\nSintomas: Manchas marrom-escuras, circulares ou arredondas em folhas, caules e gr\u00e3os. Na regi\u00e3o externa \u00e0s manchas, caracteriza-se um halo amarelo-claro.<\/p>\n

\"\"Dispon\u00edvel em\u00a0Jardineiro.Net<\/a><\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

segunda, 26 de maio de 2014 Por Raquel Patro A mancha-parda \u00e9 bastante conhecida na regi\u00e3o sul do Brasil. \u00c9 uma doen\u00e7a causada pelos fungos do g\u00eanero\u00a0Bipolaris\u00a0e infecta principalmente gram\u00edneas. Estes fungos causam danos em arroz, coqueiro, pastagens, girassol, milho, c\u00f4co, lupino, p\u00e2ndano, confete, d\u00e1lia, entre tantas outras plantas. As infec\u00e7\u00f5es s\u00e3o mais acentuadas em […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1431],"tags":[],"class_list":["post-178581","post","type-post","status-publish","format-standard","hentry","category-cuidados"],"acf":[],"yoast_head":"\nMancha-Parda -  <\/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:\/\/www.trapp.com.br\/mancha-parda\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Mancha-Parda -  \" \/>\n<meta property=\"og:description\" content=\"segunda, 26 de maio de 2014 Por Raquel Patro A mancha-parda \u00e9 bastante conhecida na regi\u00e3o sul do Brasil. \u00c9 uma doen\u00e7a causada pelos fungos do g\u00eanero\u00a0Bipolaris\u00a0e infecta principalmente gram\u00edneas. 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