Variabilidade espacial de colletotrichum truncatum em campo de soja sob três níveis de sanidade de sementes

Detalhes bibliográficos
Autor(a) principal: Noetzold, Rafael
Data de Publicação: 2014
Outros Autores: Alves, Marcelo de Carvalho, Cassetari Neto, Daniel, Machado, Andreia Quixabeira
Tipo de documento: Artigo
Idioma: por
Título da fonte: Repositório Institucional da UFLA
Texto Completo: http://repositorio.ufla.br/jspui/handle/1/39145
Resumo: This study aimed to characterize the spatial variability of Colletotrichum truncatum (Schwein) incidence among harvested soybean seeds and to determine the best semivariogram model and method to represent C. truncatum incidence among these harvested seeds. The experiment was conducted under field conditions in 2009/10 crop cycle, in 3 plots of 9.9 x 10 m, using seeds inoculated with C. truncatum. The inoculum corresponded to 0.8, 1.6 and 2.4% of the total sown seeds. Three meshes were marked with GNSS receivers, totaling 112 points in each plot spaced at 1.3 m on the row. At the end of soybean cycle, seeds were harvested, dried and analyzed for their health according to the blotter test, considering the 336 demarked points. Four semivariogram models were adjusted to the collected data by using the methods ordinary least squares (OLS), weighted least squares (WLS), maximum likelihood (ML) and restricted maximum likelihood (REML). Cross-validation was used for the final selection of the semivariogram model and method. Then, kriging and kriging standard deviation were performed. The kriging maps illustrated the seed-to-seed transmission and its variance. Spatial dependence was found for C. truncatum transmission through the seeds. The best semivariogram model was spherical and the best fit was REML. There was a range of 0.95, 4.03 and 7.05 m for plots with 0.8, 1.6 and 2.4% inoculated seeds, respectively. The higher the primary inoculum of the plot, the higher the transmission to seeds near the inoculum source.
id UFLA_4394b9b8407892227083a9c40e6eca3b
oai_identifier_str oai:localhost:1/39145
network_acronym_str UFLA
network_name_str Repositório Institucional da UFLA
repository_id_str
spelling Variabilidade espacial de colletotrichum truncatum em campo de soja sob três níveis de sanidade de sementesSpatial variability of Colletotrichum truncatum in soybean field under three seed health levelsMáxima verossimilhança restritaSemivariograma esféricoRestricted maximum likelihoodSpherical semivariogramThis study aimed to characterize the spatial variability of Colletotrichum truncatum (Schwein) incidence among harvested soybean seeds and to determine the best semivariogram model and method to represent C. truncatum incidence among these harvested seeds. The experiment was conducted under field conditions in 2009/10 crop cycle, in 3 plots of 9.9 x 10 m, using seeds inoculated with C. truncatum. The inoculum corresponded to 0.8, 1.6 and 2.4% of the total sown seeds. Three meshes were marked with GNSS receivers, totaling 112 points in each plot spaced at 1.3 m on the row. At the end of soybean cycle, seeds were harvested, dried and analyzed for their health according to the blotter test, considering the 336 demarked points. Four semivariogram models were adjusted to the collected data by using the methods ordinary least squares (OLS), weighted least squares (WLS), maximum likelihood (ML) and restricted maximum likelihood (REML). Cross-validation was used for the final selection of the semivariogram model and method. Then, kriging and kriging standard deviation were performed. The kriging maps illustrated the seed-to-seed transmission and its variance. Spatial dependence was found for C. truncatum transmission through the seeds. The best semivariogram model was spherical and the best fit was REML. There was a range of 0.95, 4.03 and 7.05 m for plots with 0.8, 1.6 and 2.4% inoculated seeds, respectively. The higher the primary inoculum of the plot, the higher the transmission to seeds near the inoculum source.Objetivou-se caracterizar a variabilidade espacial da incidência de Colletotrichum truncatum (Schwein) em sementes colhidas de soja e determinar o melhor modelo e método de semivariograma que represente a incidência de C. truncatum dessas sementes. O experimento foi realizado em condições de campo na safra 2009/10, em 3 parcelas de 9,9 x 10 m, com sementes inoculadas com C.truncatum. O inóculo correspondeu a 0,8; 1,6 e 2,4% do total semeado. Foram demarcadas 3 malhas com receptores GNSS, totalizando 112 pontos em cada parcela distanciados a 1,3 m na linha. No final do ciclo da soja, realizaram-se a colheita, a secagem e a análise sanitária das sementes pelo método 'blotter test', referente aos 336 pontos demarcados. Quatro modelos de semivariogramas foram ajustados aos dados coletados utilizando os métodos mínimos quadrados ordinários (OLS), mínimos quadrados ponderados (WLS), máxima verossimilhança (ML) e máxima verossimilhança restrita (REML). A validação cruzada foi empregada para escolha final do modelo e método do semivariograma. Em seguida, efetuaram-se a krigagem e o desvio padrão da krigagem. Os mapas de krigagem ilustraram a transmissão da semente para a semente e a sua variância. Verificou-se estrutura de dependência espacial da transmissão de C. truncatum via semente. O melhor modelo de semivariograma foi o esférico e o melhor ajuste foi o REML. Houve alcance de 0,95, 4,03 e 7,05 m para as parcelas com 0,8, 1,6 e 2,4% de sementes inoculadas respectivamente. Quanto maior o inóculo primário da parcela, maior foi a transmissão para as sementesGrupo Paulista de Fitopatologia2020-03-04T19:09:30Z2020-03-04T19:09:30Z2014info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfNOETZOLD, R. et al. Variabilidade espacial de colletotrichum truncatum em campo de soja sob três níveis de sanidade de sementes. Summa Phytopatholica, Botucatu, v. 40, n. 1, p. 16-23, 2014.http://repositorio.ufla.br/jspui/handle/1/39145Summa Phytopatholicareponame:Repositório Institucional da UFLAinstname:Universidade Federal de Lavras (UFLA)instacron:UFLAAttribution-NonCommercial 4.0 Internationalhttp://creativecommons.org/licenses/by-nc/4.0/info:eu-repo/semantics/openAccessNoetzold, RafaelAlves, Marcelo de CarvalhoCassetari Neto, DanielMachado, Andreia Quixabeirapor2020-03-04T19:09:30Zoai:localhost:1/39145Repositório InstitucionalPUBhttp://repositorio.ufla.br/oai/requestnivaldo@ufla.br || repositorio.biblioteca@ufla.bropendoar:2020-03-04T19:09:30Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)false
dc.title.none.fl_str_mv Variabilidade espacial de colletotrichum truncatum em campo de soja sob três níveis de sanidade de sementes
Spatial variability of Colletotrichum truncatum in soybean field under three seed health levels
title Variabilidade espacial de colletotrichum truncatum em campo de soja sob três níveis de sanidade de sementes
spellingShingle Variabilidade espacial de colletotrichum truncatum em campo de soja sob três níveis de sanidade de sementes
Noetzold, Rafael
Máxima verossimilhança restrita
Semivariograma esférico
Restricted maximum likelihood
Spherical semivariogram
title_short Variabilidade espacial de colletotrichum truncatum em campo de soja sob três níveis de sanidade de sementes
title_full Variabilidade espacial de colletotrichum truncatum em campo de soja sob três níveis de sanidade de sementes
title_fullStr Variabilidade espacial de colletotrichum truncatum em campo de soja sob três níveis de sanidade de sementes
title_full_unstemmed Variabilidade espacial de colletotrichum truncatum em campo de soja sob três níveis de sanidade de sementes
title_sort Variabilidade espacial de colletotrichum truncatum em campo de soja sob três níveis de sanidade de sementes
author Noetzold, Rafael
author_facet Noetzold, Rafael
Alves, Marcelo de Carvalho
Cassetari Neto, Daniel
Machado, Andreia Quixabeira
author_role author
author2 Alves, Marcelo de Carvalho
Cassetari Neto, Daniel
Machado, Andreia Quixabeira
author2_role author
author
author
dc.contributor.author.fl_str_mv Noetzold, Rafael
Alves, Marcelo de Carvalho
Cassetari Neto, Daniel
Machado, Andreia Quixabeira
dc.subject.por.fl_str_mv Máxima verossimilhança restrita
Semivariograma esférico
Restricted maximum likelihood
Spherical semivariogram
topic Máxima verossimilhança restrita
Semivariograma esférico
Restricted maximum likelihood
Spherical semivariogram
description This study aimed to characterize the spatial variability of Colletotrichum truncatum (Schwein) incidence among harvested soybean seeds and to determine the best semivariogram model and method to represent C. truncatum incidence among these harvested seeds. The experiment was conducted under field conditions in 2009/10 crop cycle, in 3 plots of 9.9 x 10 m, using seeds inoculated with C. truncatum. The inoculum corresponded to 0.8, 1.6 and 2.4% of the total sown seeds. Three meshes were marked with GNSS receivers, totaling 112 points in each plot spaced at 1.3 m on the row. At the end of soybean cycle, seeds were harvested, dried and analyzed for their health according to the blotter test, considering the 336 demarked points. Four semivariogram models were adjusted to the collected data by using the methods ordinary least squares (OLS), weighted least squares (WLS), maximum likelihood (ML) and restricted maximum likelihood (REML). Cross-validation was used for the final selection of the semivariogram model and method. Then, kriging and kriging standard deviation were performed. The kriging maps illustrated the seed-to-seed transmission and its variance. Spatial dependence was found for C. truncatum transmission through the seeds. The best semivariogram model was spherical and the best fit was REML. There was a range of 0.95, 4.03 and 7.05 m for plots with 0.8, 1.6 and 2.4% inoculated seeds, respectively. The higher the primary inoculum of the plot, the higher the transmission to seeds near the inoculum source.
publishDate 2014
dc.date.none.fl_str_mv 2014
2020-03-04T19:09:30Z
2020-03-04T19:09:30Z
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 NOETZOLD, R. et al. Variabilidade espacial de colletotrichum truncatum em campo de soja sob três níveis de sanidade de sementes. Summa Phytopatholica, Botucatu, v. 40, n. 1, p. 16-23, 2014.
http://repositorio.ufla.br/jspui/handle/1/39145
identifier_str_mv NOETZOLD, R. et al. Variabilidade espacial de colletotrichum truncatum em campo de soja sob três níveis de sanidade de sementes. Summa Phytopatholica, Botucatu, v. 40, n. 1, p. 16-23, 2014.
url http://repositorio.ufla.br/jspui/handle/1/39145
dc.language.iso.fl_str_mv por
language por
dc.rights.driver.fl_str_mv Attribution-NonCommercial 4.0 International
http://creativecommons.org/licenses/by-nc/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Attribution-NonCommercial 4.0 International
http://creativecommons.org/licenses/by-nc/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Grupo Paulista de Fitopatologia
publisher.none.fl_str_mv Grupo Paulista de Fitopatologia
dc.source.none.fl_str_mv Summa Phytopatholica
reponame:Repositório Institucional da UFLA
instname:Universidade Federal de Lavras (UFLA)
instacron:UFLA
instname_str Universidade Federal de Lavras (UFLA)
instacron_str UFLA
institution UFLA
reponame_str Repositório Institucional da UFLA
collection Repositório Institucional da UFLA
repository.name.fl_str_mv Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)
repository.mail.fl_str_mv nivaldo@ufla.br || repositorio.biblioteca@ufla.br
_version_ 1815438991204286464

Registros relacionados