Occurrence of viruses and stunting diseases and estimative of yield losses by mollicutes in corn in Paraná State, Brazil
Autor(a) principal: | |
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Data de Publicação: | 2003 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Pesquisa Agropecuária Brasileira (Online) |
Texto Completo: | https://seer.sct.embrapa.br/index.php/pab/article/view/6539 |
Resumo: | The objective of this work was to evaluate the occurence and yield losses by corn stunting diseases and maize viruses in "safrinha" season. Disease diagnostics based on plant symptoms were confirmed by PCR or RT-PCR assays. Insect samples were collected in 24 fields for identification of vectors of the pathogens. Corn stunting diseases symptoms were observed in all crops evaluated, with incidence levels ranging from 6.2% to 49.9% (average 20.7%) and the presence of the leafhopper Dalbulus maidis, was detected in 20 of the 24 areas evaluated. This insect species was prevalent, representing 66,6% of total leafhoppers specimens collected. The potential yield losses caused by mollicutes was estimated around US$ 16.5 million. Few plants showing Maize rayado fino virus and Maize dwarf mosaic virus symptoms were found and virus infection was confirmed by RT-PCR. Mal de Río Cuarto virus was not detected in all 441 plants analyzed by DAS-ELISA. Results of PCR assays indicated the presence of a possible phytoplasma different from maize bushy stunt phytoplasma in two stunting maize plants showing leaves distortions and grain in the inflorescence. However, new studies should be done to confirm the identity of this possible new phytoplasma. |
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Occurrence of viruses and stunting diseases and estimative of yield losses by mollicutes in corn in Paraná State, BrazilIncidência de viroses e enfezamentos e estimativa de perdas causadas por molicutes em milho no ParanáZea mays; spiroplasma; plant diseaseZea mays; espiroplasma; doença das plantasThe objective of this work was to evaluate the occurence and yield losses by corn stunting diseases and maize viruses in "safrinha" season. Disease diagnostics based on plant symptoms were confirmed by PCR or RT-PCR assays. Insect samples were collected in 24 fields for identification of vectors of the pathogens. Corn stunting diseases symptoms were observed in all crops evaluated, with incidence levels ranging from 6.2% to 49.9% (average 20.7%) and the presence of the leafhopper Dalbulus maidis, was detected in 20 of the 24 areas evaluated. This insect species was prevalent, representing 66,6% of total leafhoppers specimens collected. The potential yield losses caused by mollicutes was estimated around US$ 16.5 million. Few plants showing Maize rayado fino virus and Maize dwarf mosaic virus symptoms were found and virus infection was confirmed by RT-PCR. Mal de Río Cuarto virus was not detected in all 441 plants analyzed by DAS-ELISA. Results of PCR assays indicated the presence of a possible phytoplasma different from maize bushy stunt phytoplasma in two stunting maize plants showing leaves distortions and grain in the inflorescence. However, new studies should be done to confirm the identity of this possible new phytoplasma.O objetivo deste trabalho foi avaliar a incidência de viroses e enfezamentos e estimar as perdas causadas por enfezamentos na cultura do milho safrinha. Os diagnósticos baseados em sintomas foram confirmados por PCR ou RT-PCR. Em todas as lavouras, foram identificadas plantas com sintomas de enfezamentos, em incidência de 6,2% a 49,9% (média de 20,7%). Na identificação de insetos vetores desses patógenos, a cigarrinha Dalbulus maidis foi detectada em 20 lavouras das 24 amostradas, constituindo 66,6% do total de espécimens de cigarrinhas coletadas. A perda potencial causada pelos enfezamentos no período foi estimada em cerca de 16,5 milhões de dólares. A ocorrência de plantas com sintomas de "Maize rayado fino virus" e "Maize dwarf mosaic virus" foi baixa e o diagnóstico confirmado por RT-PCR. A análise de 441 amostras suspeitas de infecção por "Mal de Río Cuarto virus", por DAS-ELISA, mostrou ausência desse vírus. Resultados de PCR indicaram a presença de um possível fitoplasma distinto de "Maize bushy stunt phytoplasma" em duas plantas apresentando nanismo acentuado, folhas estreitas, enrijecidas, com deformações, e grãos na inflorescência, havendo necessidade de mais estudos para a confirmação da identidade desse possível novo fitoplasma.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraOliveira, Elizabeth deResende, Renato de OliveiraPecci, María de la Paz GiménezLaguna, Irma GracielaHerrera, PatriciaCruz, Ivan2003-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/6539Pesquisa Agropecuaria Brasileira; v.38, n.1, jan. 2003; 19-25Pesquisa Agropecuária Brasileira; v.38, n.1, jan. 2003; 19-251678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/6539/3596info:eu-repo/semantics/openAccess2014-08-12T19:32:42Zoai:ojs.seer.sct.embrapa.br:article/6539Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-08-12T19:32:42Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Occurrence of viruses and stunting diseases and estimative of yield losses by mollicutes in corn in Paraná State, Brazil Incidência de viroses e enfezamentos e estimativa de perdas causadas por molicutes em milho no Paraná |
title |
Occurrence of viruses and stunting diseases and estimative of yield losses by mollicutes in corn in Paraná State, Brazil |
spellingShingle |
Occurrence of viruses and stunting diseases and estimative of yield losses by mollicutes in corn in Paraná State, Brazil Oliveira, Elizabeth de Zea mays; spiroplasma; plant disease Zea mays; espiroplasma; doença das plantas |
title_short |
Occurrence of viruses and stunting diseases and estimative of yield losses by mollicutes in corn in Paraná State, Brazil |
title_full |
Occurrence of viruses and stunting diseases and estimative of yield losses by mollicutes in corn in Paraná State, Brazil |
title_fullStr |
Occurrence of viruses and stunting diseases and estimative of yield losses by mollicutes in corn in Paraná State, Brazil |
title_full_unstemmed |
Occurrence of viruses and stunting diseases and estimative of yield losses by mollicutes in corn in Paraná State, Brazil |
title_sort |
Occurrence of viruses and stunting diseases and estimative of yield losses by mollicutes in corn in Paraná State, Brazil |
author |
Oliveira, Elizabeth de |
author_facet |
Oliveira, Elizabeth de Resende, Renato de Oliveira Pecci, María de la Paz Giménez Laguna, Irma Graciela Herrera, Patricia Cruz, Ivan |
author_role |
author |
author2 |
Resende, Renato de Oliveira Pecci, María de la Paz Giménez Laguna, Irma Graciela Herrera, Patricia Cruz, Ivan |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
|
dc.contributor.author.fl_str_mv |
Oliveira, Elizabeth de Resende, Renato de Oliveira Pecci, María de la Paz Giménez Laguna, Irma Graciela Herrera, Patricia Cruz, Ivan |
dc.subject.por.fl_str_mv |
Zea mays; spiroplasma; plant disease Zea mays; espiroplasma; doença das plantas |
topic |
Zea mays; spiroplasma; plant disease Zea mays; espiroplasma; doença das plantas |
description |
The objective of this work was to evaluate the occurence and yield losses by corn stunting diseases and maize viruses in "safrinha" season. Disease diagnostics based on plant symptoms were confirmed by PCR or RT-PCR assays. Insect samples were collected in 24 fields for identification of vectors of the pathogens. Corn stunting diseases symptoms were observed in all crops evaluated, with incidence levels ranging from 6.2% to 49.9% (average 20.7%) and the presence of the leafhopper Dalbulus maidis, was detected in 20 of the 24 areas evaluated. This insect species was prevalent, representing 66,6% of total leafhoppers specimens collected. The potential yield losses caused by mollicutes was estimated around US$ 16.5 million. Few plants showing Maize rayado fino virus and Maize dwarf mosaic virus symptoms were found and virus infection was confirmed by RT-PCR. Mal de Río Cuarto virus was not detected in all 441 plants analyzed by DAS-ELISA. Results of PCR assays indicated the presence of a possible phytoplasma different from maize bushy stunt phytoplasma in two stunting maize plants showing leaves distortions and grain in the inflorescence. However, new studies should be done to confirm the identity of this possible new phytoplasma. |
publishDate |
2003 |
dc.date.none.fl_str_mv |
2003-01-01 |
dc.type.none.fl_str_mv |
|
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://seer.sct.embrapa.br/index.php/pab/article/view/6539 |
url |
https://seer.sct.embrapa.br/index.php/pab/article/view/6539 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://seer.sct.embrapa.br/index.php/pab/article/view/6539/3596 |
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 |
Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira |
publisher.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira |
dc.source.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira; v.38, n.1, jan. 2003; 19-25 Pesquisa Agropecuária Brasileira; v.38, n.1, jan. 2003; 19-25 1678-3921 0100-104x reponame:Pesquisa Agropecuária Brasileira (Online) instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
instname_str |
Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
instacron_str |
EMBRAPA |
institution |
EMBRAPA |
reponame_str |
Pesquisa Agropecuária Brasileira (Online) |
collection |
Pesquisa Agropecuária Brasileira (Online) |
repository.name.fl_str_mv |
Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
repository.mail.fl_str_mv |
pab@sct.embrapa.br || sct.pab@embrapa.br |
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1793416662901325824 |