Regional and varietal differences in prevalence and incidence levels of Bipolaris species in Brazilian rice seedlots
Main Author: | |
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Publication Date: | 2014 |
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Format: | Article |
Language: | eng |
Source: | LOCUS Repositório Institucional da UFV |
Download full: | http://dx.doi.org/10.1590/S1982-56762014000500001 https://locus.ufv.br//handle/123456789/27139 |
Summary: | A total of 722 rice seed lots were collected at six production regions of Rio Grande do Sul state during three consecutive seasons (2009/10 to 2011/12). For each seed lot, 200 seeds were assessed for the presence of Bipolaris spp. using a standard seed health blotter test. Results showed that B. oryzae and B. cynodontis were found in 62.5% and 10.4% of the seed lots, respectively. Overall mean incidence of B. oryzae and B. cynodontis were 0.5% and 0.06%, respectively. For the two most sampled varieties (75% of the seed lots), IRGA 424 and Puitá INTA CL, mean incidence levels were highest and lowest, respectively. Among regions, infection risk was highest in the southeastern and lowest in the western regions of the state, especially the Fronteira Oeste. The prevalence and the incidence levels of Bipolaris oryzae reported in this study were lower than previous reports in the same region - eighty percent of the seed lots showed incidence levels below the recommended 5% inoculum threshold. In conclusion, rice seeds produced by IRGA-certified growers showed an overall good health quality with regards to B. oryzae infection, which is the main Bipolaris species associated with rice seeds in southern Brazil. |
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Del Ponte, Emerson MedeirosFunck, Gustavo DaltrozzoDeibler, Alexandre NunesSchwanck, André AguiarCaniela, Ana Rita de AlmeidaFarias, Cândida Renata Jacobsen deMeneses, Priscila Rossatto2019-09-25T14:42:49Z2019-09-25T14:42:49Z2014-091983-2052http://dx.doi.org/10.1590/S1982-56762014000500001https://locus.ufv.br//handle/123456789/27139A total of 722 rice seed lots were collected at six production regions of Rio Grande do Sul state during three consecutive seasons (2009/10 to 2011/12). For each seed lot, 200 seeds were assessed for the presence of Bipolaris spp. using a standard seed health blotter test. Results showed that B. oryzae and B. cynodontis were found in 62.5% and 10.4% of the seed lots, respectively. Overall mean incidence of B. oryzae and B. cynodontis were 0.5% and 0.06%, respectively. For the two most sampled varieties (75% of the seed lots), IRGA 424 and Puitá INTA CL, mean incidence levels were highest and lowest, respectively. Among regions, infection risk was highest in the southeastern and lowest in the western regions of the state, especially the Fronteira Oeste. The prevalence and the incidence levels of Bipolaris oryzae reported in this study were lower than previous reports in the same region - eighty percent of the seed lots showed incidence levels below the recommended 5% inoculum threshold. In conclusion, rice seeds produced by IRGA-certified growers showed an overall good health quality with regards to B. oryzae infection, which is the main Bipolaris species associated with rice seeds in southern Brazil.engTropical Plant Pathologyv. 39, p. 05, p. 349- 356, set./ out. 2014Bipolaris oryzaeOryza sativaBrown spotSeed pathologyRegional and varietal differences in prevalence and incidence levels of Bipolaris species in Brazilian rice seedlotsinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfinfo:eu-repo/semantics/openAccessreponame:LOCUS Repositório Institucional da UFVinstname:Universidade Federal de Viçosa (UFV)instacron:UFVORIGINALartigo.pdfartigo.pdfTexto completoapplication/pdf1963167https://locus.ufv.br//bitstream/123456789/27139/1/artigo.pdf68b376a20cbc25dec7f1a7862a2cf587MD51LICENSElicense.txtlicense.txttext/plain; charset=utf-81748https://locus.ufv.br//bitstream/123456789/27139/2/license.txt8a4605be74aa9ea9d79846c1fba20a33MD52123456789/271392019-09-25 11:56:58.086oai:locus.ufv.br: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Repositório InstitucionalPUBhttps://www.locus.ufv.br/oai/requestfabiojreis@ufv.bropendoar:21452019-09-25T14:56:58LOCUS Repositório Institucional da UFV - Universidade Federal de Viçosa (UFV)false |
dc.title.en.fl_str_mv |
Regional and varietal differences in prevalence and incidence levels of Bipolaris species in Brazilian rice seedlots |
title |
Regional and varietal differences in prevalence and incidence levels of Bipolaris species in Brazilian rice seedlots |
spellingShingle |
Regional and varietal differences in prevalence and incidence levels of Bipolaris species in Brazilian rice seedlots Del Ponte, Emerson Medeiros Bipolaris oryzae Oryza sativa Brown spot Seed pathology |
title_short |
Regional and varietal differences in prevalence and incidence levels of Bipolaris species in Brazilian rice seedlots |
title_full |
Regional and varietal differences in prevalence and incidence levels of Bipolaris species in Brazilian rice seedlots |
title_fullStr |
Regional and varietal differences in prevalence and incidence levels of Bipolaris species in Brazilian rice seedlots |
title_full_unstemmed |
Regional and varietal differences in prevalence and incidence levels of Bipolaris species in Brazilian rice seedlots |
title_sort |
Regional and varietal differences in prevalence and incidence levels of Bipolaris species in Brazilian rice seedlots |
author |
Del Ponte, Emerson Medeiros |
author_facet |
Del Ponte, Emerson Medeiros Funck, Gustavo Daltrozzo Deibler, Alexandre Nunes Schwanck, André Aguiar Caniela, Ana Rita de Almeida Farias, Cândida Renata Jacobsen de Meneses, Priscila Rossatto |
author_role |
author |
author2 |
Funck, Gustavo Daltrozzo Deibler, Alexandre Nunes Schwanck, André Aguiar Caniela, Ana Rita de Almeida Farias, Cândida Renata Jacobsen de Meneses, Priscila Rossatto |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Del Ponte, Emerson Medeiros Funck, Gustavo Daltrozzo Deibler, Alexandre Nunes Schwanck, André Aguiar Caniela, Ana Rita de Almeida Farias, Cândida Renata Jacobsen de Meneses, Priscila Rossatto |
dc.subject.pt-BR.fl_str_mv |
Bipolaris oryzae Oryza sativa Brown spot Seed pathology |
topic |
Bipolaris oryzae Oryza sativa Brown spot Seed pathology |
description |
A total of 722 rice seed lots were collected at six production regions of Rio Grande do Sul state during three consecutive seasons (2009/10 to 2011/12). For each seed lot, 200 seeds were assessed for the presence of Bipolaris spp. using a standard seed health blotter test. Results showed that B. oryzae and B. cynodontis were found in 62.5% and 10.4% of the seed lots, respectively. Overall mean incidence of B. oryzae and B. cynodontis were 0.5% and 0.06%, respectively. For the two most sampled varieties (75% of the seed lots), IRGA 424 and Puitá INTA CL, mean incidence levels were highest and lowest, respectively. Among regions, infection risk was highest in the southeastern and lowest in the western regions of the state, especially the Fronteira Oeste. The prevalence and the incidence levels of Bipolaris oryzae reported in this study were lower than previous reports in the same region - eighty percent of the seed lots showed incidence levels below the recommended 5% inoculum threshold. In conclusion, rice seeds produced by IRGA-certified growers showed an overall good health quality with regards to B. oryzae infection, which is the main Bipolaris species associated with rice seeds in southern Brazil. |
publishDate |
2014 |
dc.date.issued.fl_str_mv |
2014-09 |
dc.date.accessioned.fl_str_mv |
2019-09-25T14:42:49Z |
dc.date.available.fl_str_mv |
2019-09-25T14:42:49Z |
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/S1982-56762014000500001 https://locus.ufv.br//handle/123456789/27139 |
dc.identifier.issn.none.fl_str_mv |
1983-2052 |
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1983-2052 |
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http://dx.doi.org/10.1590/S1982-56762014000500001 https://locus.ufv.br//handle/123456789/27139 |
dc.language.iso.fl_str_mv |
eng |
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eng |
dc.relation.ispartofseries.pt-BR.fl_str_mv |
v. 39, p. 05, p. 349- 356, set./ out. 2014 |
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openAccess |
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Tropical Plant Pathology |
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Tropical Plant Pathology |
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