Reflectance as a decision-making tool for the application of fungicide to the Asian Soybean Rust

Detalhes bibliográficos
Autor(a) principal: Michels, Roger N.
Data de Publicação: 2019
Outros Autores: Canteri, Marcelo G., Silva, Marcelo A. de Aguiar e, Bertozzi, Janksyn, Bosco, Tatiane C. dal
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: https://doi.org/10.19084/RCA17333
Resumo: The objective of this study was to evaluate the application of GreenSeeker® (radiometer) the ideal time of application of fungicide on soybeans and the relationship between NDVI (Normalized Difference Vegetation Index) and productivity. Two experiments were conducted at the Universidade Estadual de Londrina (2012/2013 and 2013/2014 crops), both with experimental design of random blocks (6x4). The treatments aimed at obtaining a disease gradient (Asian soybean rust) by means of different numbers and times of application of fungicide. The quantification of the severity of the disease was made through the diagram scale and the readings of NDVI. Were analyzed the total mass, the 1.000 grains mass, the humidity, and productivity in kg ha-1. A decrease in productivity was observed in connection with the delay in the application of the fungicide and the same happened in the area below the NDVI curve. At the same time when a statistical difference between the treatments of the severity was observed there was also a significant statistical difference (P<0.05) between the values of NDVI. The NDVI contributes to decision making about the best moment for the application of fungicide in the culture of soy for the control of Asian rust and presents regular results for the estimation of productivity.
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spelling Reflectance as a decision-making tool for the application of fungicide to the Asian Soybean RustReflectância como ferramenta de decisão para a aplicação de fungicida na ferrugem asiática da sojaGeralThe objective of this study was to evaluate the application of GreenSeeker® (radiometer) the ideal time of application of fungicide on soybeans and the relationship between NDVI (Normalized Difference Vegetation Index) and productivity. Two experiments were conducted at the Universidade Estadual de Londrina (2012/2013 and 2013/2014 crops), both with experimental design of random blocks (6x4). The treatments aimed at obtaining a disease gradient (Asian soybean rust) by means of different numbers and times of application of fungicide. The quantification of the severity of the disease was made through the diagram scale and the readings of NDVI. Were analyzed the total mass, the 1.000 grains mass, the humidity, and productivity in kg ha-1. A decrease in productivity was observed in connection with the delay in the application of the fungicide and the same happened in the area below the NDVI curve. At the same time when a statistical difference between the treatments of the severity was observed there was also a significant statistical difference (P<0.05) between the values of NDVI. The NDVI contributes to decision making about the best moment for the application of fungicide in the culture of soy for the control of Asian rust and presents regular results for the estimation of productivity.O objetivo deste estudo foi avaliar a aplicação de GreenSeeker® (radiômetro) na detecção do momento ideal para a aplicação de fungicida na soja e a relação entre NDVI (Normalized Difference Vegetation Index) e produtividade. Dois experimentos foram realizados na Universidade Estadual de Londrina (culturas 2012/2013 e 2013/2014), ambos com delineamento experimental de blocos ao acaso (6x4). Os tratamentos visavam a obtenção de um gradiente de doença (ferrugem asiática da soja) por meio de diferentes números e épocas de aplicação de fungicida. A quantificação da severidade da doença foi feita por meio da escala diagramática e das leituras de NDVI. Foram analisadas a massa total, a massa de 1.000 grãos, a umidade e a produtividade em kg ha-1. Observou-se uma queda na produtividade em relação ao atraso na aplicação do fungicida e o mesmo ocorreu na área abaixo da curva do NDVI. Ao mesmo tempo em que observou-se diferença estatística entre os tratamentos para a severidade da doença, houve diferença estatística significativa (P <0,05) entre os valores de NDVI. O NDVI contribuiu para a tomada de decisão sobre o melhor momento para a aplicação de fungicida na cultura da soja para o controle da ferrugem asiática e apresenta resultados regulares para a estimação da produtividade.Sociedade de Ciências Agrárias de Portugal2019-01-18T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttps://doi.org/10.19084/RCA17333eng2183-041X0871-018XMichels, Roger N.Canteri, Marcelo G.Silva, Marcelo A. de Aguiar eBertozzi, JanksynBosco, Tatiane C. dalinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2022-09-06T09:24:51Zoai:ojs.revistas.rcaap.pt:article/16750Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T15:31:04.257897Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Reflectance as a decision-making tool for the application of fungicide to the Asian Soybean Rust
Reflectância como ferramenta de decisão para a aplicação de fungicida na ferrugem asiática da soja
title Reflectance as a decision-making tool for the application of fungicide to the Asian Soybean Rust
spellingShingle Reflectance as a decision-making tool for the application of fungicide to the Asian Soybean Rust
Michels, Roger N.
Geral
title_short Reflectance as a decision-making tool for the application of fungicide to the Asian Soybean Rust
title_full Reflectance as a decision-making tool for the application of fungicide to the Asian Soybean Rust
title_fullStr Reflectance as a decision-making tool for the application of fungicide to the Asian Soybean Rust
title_full_unstemmed Reflectance as a decision-making tool for the application of fungicide to the Asian Soybean Rust
title_sort Reflectance as a decision-making tool for the application of fungicide to the Asian Soybean Rust
author Michels, Roger N.
author_facet Michels, Roger N.
Canteri, Marcelo G.
Silva, Marcelo A. de Aguiar e
Bertozzi, Janksyn
Bosco, Tatiane C. dal
author_role author
author2 Canteri, Marcelo G.
Silva, Marcelo A. de Aguiar e
Bertozzi, Janksyn
Bosco, Tatiane C. dal
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Michels, Roger N.
Canteri, Marcelo G.
Silva, Marcelo A. de Aguiar e
Bertozzi, Janksyn
Bosco, Tatiane C. dal
dc.subject.por.fl_str_mv Geral
topic Geral
description The objective of this study was to evaluate the application of GreenSeeker® (radiometer) the ideal time of application of fungicide on soybeans and the relationship between NDVI (Normalized Difference Vegetation Index) and productivity. Two experiments were conducted at the Universidade Estadual de Londrina (2012/2013 and 2013/2014 crops), both with experimental design of random blocks (6x4). The treatments aimed at obtaining a disease gradient (Asian soybean rust) by means of different numbers and times of application of fungicide. The quantification of the severity of the disease was made through the diagram scale and the readings of NDVI. Were analyzed the total mass, the 1.000 grains mass, the humidity, and productivity in kg ha-1. A decrease in productivity was observed in connection with the delay in the application of the fungicide and the same happened in the area below the NDVI curve. At the same time when a statistical difference between the treatments of the severity was observed there was also a significant statistical difference (P<0.05) between the values of NDVI. The NDVI contributes to decision making about the best moment for the application of fungicide in the culture of soy for the control of Asian rust and presents regular results for the estimation of productivity.
publishDate 2019
dc.date.none.fl_str_mv 2019-01-18T00:00:00Z
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 https://doi.org/10.19084/RCA17333
url https://doi.org/10.19084/RCA17333
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 2183-041X
0871-018X
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eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Sociedade de Ciências Agrárias de Portugal
publisher.none.fl_str_mv Sociedade de Ciências Agrárias de Portugal
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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