Web blight (Thanatephorus cucumeris): a new disease on leaves of okra plants

Detalhes bibliográficos
Autor(a) principal: Gasparotto, Luadir
Data de Publicação: 2018
Outros Autores: Kano, Cristiaini, Ceresini, Paulo [UNESP], Pereira, José, Cardoso, Marinice, Pereira, Danilo [UNESP], Castroagudín, Vanina [UNESP]
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1590/1808-1657000252016
http://hdl.handle.net/11449/212029
Resumo: In an experiment on organic production of okra (Abelmoschus esculentus (L.) Moench) that was carried out from September 2013 to January 2014, in Manaus, Amazonas state, Brazil, we observed large chlorotic, necrotic, helical, discontinuous, dark or light-brown lesions with partial detachment of the injured area on the adaxial surface of leaves located in the median and basal portions of the plants. A whitish mycelium mantle covers the lesions on the leaves at the abaxial surface at high moisture conditions. Using morphological characteristics, Koch’s postulates, and phylogenetic analyses of the ITS-5.8S rDNA region, we identified that the fungus causing the lesions on the okra leaves was Thanatephorus cucumeris (Frank) Donk (asexual stage of Rhizoctonia solani Kuhn of the anastomosis group AG-1 ID). This is the first report of T. cucumeris causing web blight on okra in Brazil, and probably in the world. So far, T. cucumeris was described on okra only on post-harvest pods rotting and seedlings’ damping off.
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spelling Web blight (Thanatephorus cucumeris): a new disease on leaves of okra plantsMancha areolada (Thanatephorus cucumeris): nova doença das folhas do quiabeiroThanatephorus cucumerisAbelmoschus esculentusetiologyAmazonThanatephorus cucumerisAbelmoschus esculentusetiologiaAmazôniaIn an experiment on organic production of okra (Abelmoschus esculentus (L.) Moench) that was carried out from September 2013 to January 2014, in Manaus, Amazonas state, Brazil, we observed large chlorotic, necrotic, helical, discontinuous, dark or light-brown lesions with partial detachment of the injured area on the adaxial surface of leaves located in the median and basal portions of the plants. A whitish mycelium mantle covers the lesions on the leaves at the abaxial surface at high moisture conditions. Using morphological characteristics, Koch’s postulates, and phylogenetic analyses of the ITS-5.8S rDNA region, we identified that the fungus causing the lesions on the okra leaves was Thanatephorus cucumeris (Frank) Donk (asexual stage of Rhizoctonia solani Kuhn of the anastomosis group AG-1 ID). This is the first report of T. cucumeris causing web blight on okra in Brazil, and probably in the world. So far, T. cucumeris was described on okra only on post-harvest pods rotting and seedlings’ damping off.Em um experimento sobre a produção orgânica do quiabeiro (Abelmoschus esculentus (L.) Moench), que foi instalado em Manaus, Amazonas, Brasil, no período de setembro de 2013 a janeiro de 2014, observou-se, na face adaxial do limbo foliar das folhas medianas e baixeiras, a ocorrência de lesões cloróticas e necróticas grandes, helicoidais, de coloração marrom escuro ou marrom claro e descontínuas, com desprendimento parcial da área lesionada. Na face abaxial, sobre as manchas, em condições de alta umidade, constatou-se a presença de um manto micelial esbranquiçado do patógeno, facilmente visível, recobrindo a área colonizada. Por meio da análise de características morfológicas, postulados de Koch e análise filogenética da região ITS-5.8S do rDNA do fungo isolado, identificou-se Thanatephorus cucumeris (Frank) Donk (fase assexuada Rhizoctonia solani Kuhn grupo de anastomose AG-1 ID) como o agente causal da doença. Este é o primeiro relato de T. cucumeris causando mancha foliar em quiabeiro no Brasil e, provavelmente, no mundo. Até então, sua ocorrência em quiabeiro estava restrita à podridão pós-colheita em frutos e tombamento de mudas.Fundação de Amparo à Pesquisa do Estado do AmazonasConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Empresa Brasileira de Pesquisa AgropecuáriaUniversidade Estadual Paulista “Júlio de Mesquita Filho”Universidade Estadual Paulista “Júlio de Mesquita Filho”Fundação de Amparo à Pesquisa do Estado do Amazonas: 307295/2015-0; 2004/02127-9CNPq: 307295/2015-0; 2004/02127-9FAPESP: 307295/2015-0; 2004/02127-9Instituto BiológicoEmpresa Brasileira de Pesquisa AgropecuáriaUniversidade Estadual Paulista (Unesp)Gasparotto, LuadirKano, CristiainiCeresini, Paulo [UNESP]Pereira, JoséCardoso, MarinicePereira, Danilo [UNESP]Castroagudín, Vanina [UNESP]2021-07-14T10:33:23Z2021-07-14T10:33:23Z2018-02-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article-application/pdfhttp://dx.doi.org/10.1590/1808-1657000252016Arquivos do Instituto Biológico. Instituto Biológico, v. 84, p. -, 2018.1808-1657http://hdl.handle.net/11449/21202910.1590/1808-1657000252016S1808-16572017000100306S1808-16572017000100306.pdfSciELOreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengArquivos do Instituto Biológicoinfo:eu-repo/semantics/openAccess2023-10-18T06:04:02Zoai:repositorio.unesp.br:11449/212029Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T15:12:47.041115Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Web blight (Thanatephorus cucumeris): a new disease on leaves of okra plants
Mancha areolada (Thanatephorus cucumeris): nova doença das folhas do quiabeiro
title Web blight (Thanatephorus cucumeris): a new disease on leaves of okra plants
spellingShingle Web blight (Thanatephorus cucumeris): a new disease on leaves of okra plants
Gasparotto, Luadir
Thanatephorus cucumeris
Abelmoschus esculentus
etiology
Amazon
Thanatephorus cucumeris
Abelmoschus esculentus
etiologia
Amazônia
title_short Web blight (Thanatephorus cucumeris): a new disease on leaves of okra plants
title_full Web blight (Thanatephorus cucumeris): a new disease on leaves of okra plants
title_fullStr Web blight (Thanatephorus cucumeris): a new disease on leaves of okra plants
title_full_unstemmed Web blight (Thanatephorus cucumeris): a new disease on leaves of okra plants
title_sort Web blight (Thanatephorus cucumeris): a new disease on leaves of okra plants
author Gasparotto, Luadir
author_facet Gasparotto, Luadir
Kano, Cristiaini
Ceresini, Paulo [UNESP]
Pereira, José
Cardoso, Marinice
Pereira, Danilo [UNESP]
Castroagudín, Vanina [UNESP]
author_role author
author2 Kano, Cristiaini
Ceresini, Paulo [UNESP]
Pereira, José
Cardoso, Marinice
Pereira, Danilo [UNESP]
Castroagudín, Vanina [UNESP]
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Empresa Brasileira de Pesquisa Agropecuária
Universidade Estadual Paulista (Unesp)
dc.contributor.author.fl_str_mv Gasparotto, Luadir
Kano, Cristiaini
Ceresini, Paulo [UNESP]
Pereira, José
Cardoso, Marinice
Pereira, Danilo [UNESP]
Castroagudín, Vanina [UNESP]
dc.subject.por.fl_str_mv Thanatephorus cucumeris
Abelmoschus esculentus
etiology
Amazon
Thanatephorus cucumeris
Abelmoschus esculentus
etiologia
Amazônia
topic Thanatephorus cucumeris
Abelmoschus esculentus
etiology
Amazon
Thanatephorus cucumeris
Abelmoschus esculentus
etiologia
Amazônia
description In an experiment on organic production of okra (Abelmoschus esculentus (L.) Moench) that was carried out from September 2013 to January 2014, in Manaus, Amazonas state, Brazil, we observed large chlorotic, necrotic, helical, discontinuous, dark or light-brown lesions with partial detachment of the injured area on the adaxial surface of leaves located in the median and basal portions of the plants. A whitish mycelium mantle covers the lesions on the leaves at the abaxial surface at high moisture conditions. Using morphological characteristics, Koch’s postulates, and phylogenetic analyses of the ITS-5.8S rDNA region, we identified that the fungus causing the lesions on the okra leaves was Thanatephorus cucumeris (Frank) Donk (asexual stage of Rhizoctonia solani Kuhn of the anastomosis group AG-1 ID). This is the first report of T. cucumeris causing web blight on okra in Brazil, and probably in the world. So far, T. cucumeris was described on okra only on post-harvest pods rotting and seedlings’ damping off.
publishDate 2018
dc.date.none.fl_str_mv 2018-02-01
2021-07-14T10:33:23Z
2021-07-14T10:33:23Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.1590/1808-1657000252016
Arquivos do Instituto Biológico. Instituto Biológico, v. 84, p. -, 2018.
1808-1657
http://hdl.handle.net/11449/212029
10.1590/1808-1657000252016
S1808-16572017000100306
S1808-16572017000100306.pdf
url http://dx.doi.org/10.1590/1808-1657000252016
http://hdl.handle.net/11449/212029
identifier_str_mv Arquivos do Instituto Biológico. Instituto Biológico, v. 84, p. -, 2018.
1808-1657
10.1590/1808-1657000252016
S1808-16572017000100306
S1808-16572017000100306.pdf
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Arquivos do Instituto Biológico
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv -
application/pdf
dc.publisher.none.fl_str_mv Instituto Biológico
publisher.none.fl_str_mv Instituto Biológico
dc.source.none.fl_str_mv SciELO
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
_version_ 1808128481170554880

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