Fungicide spray coverage and deposition in soybean asian rust management
Autor(a) principal: | |
---|---|
Data de Publicação: | 2019 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Bioscience journal (Online) |
Texto Completo: | https://seer.ufu.br/index.php/biosciencejournal/article/view/42323 |
Resumo: | At maximum vegetative growth, sprays with fungicide to control Asian rust (Phakopsora pachyrhizi Sydow and P. Sydow) should reach high canopy penetration and plant coverage. Therefore, the central objective of this study was to determine leaf area, spray deposition, and plant coverage by fungicides sprayed on soybeans as a function of sowing seasons and plant population densities with reduced doses of tebuconazole and azoxystrobin + cyproconazole. Field experiments were conducted in the 2009/2010 and 2010/2011 crop years, using a medium-cycle soybean cultivar MG/BR–46 (Conquista) under a natural infestation of Asian soybean rust. Leaf area (LA) and leaf area index (LAI) were measured at three developmental stages (V8, R2, and R4). Spray deposition and coverage were evaluated during the first fungicide spraying. As results, LAI decreased as plant population decreased. Despite the lower LAIs, smaller plant populations had no effect on spray deposition and plant coverage. Both fungicides presented similar depositions on all thirds when plants had lower development. |
id |
UFU-14_c3711822d77b298d39931e6d434070b2 |
---|---|
oai_identifier_str |
oai:ojs.www.seer.ufu.br:article/42323 |
network_acronym_str |
UFU-14 |
network_name_str |
Bioscience journal (Online) |
repository_id_str |
|
spelling |
Fungicide spray coverage and deposition in soybean asian rust managementCobertura e depósito de calda fungicida no manejo da ferrugem asiática em sojaChemical controlSowing seasonLeaf area indexPhakopsora pachyrhizi Sydow and P. SydowPlant populationAgricultural SciencesAt maximum vegetative growth, sprays with fungicide to control Asian rust (Phakopsora pachyrhizi Sydow and P. Sydow) should reach high canopy penetration and plant coverage. Therefore, the central objective of this study was to determine leaf area, spray deposition, and plant coverage by fungicides sprayed on soybeans as a function of sowing seasons and plant population densities with reduced doses of tebuconazole and azoxystrobin + cyproconazole. Field experiments were conducted in the 2009/2010 and 2010/2011 crop years, using a medium-cycle soybean cultivar MG/BR–46 (Conquista) under a natural infestation of Asian soybean rust. Leaf area (LA) and leaf area index (LAI) were measured at three developmental stages (V8, R2, and R4). Spray deposition and coverage were evaluated during the first fungicide spraying. As results, LAI decreased as plant population decreased. Despite the lower LAIs, smaller plant populations had no effect on spray deposition and plant coverage. Both fungicides presented similar depositions on all thirds when plants had lower development.Para o controle da ferrugem asiática (Phakopsora pachyrhizi Sydow & P. Sydow), quando as plantas atingem o máximo de desenvolvimento vegetativo, as pulverizações com fungicidas necessitam de alta capacidade de penetração e cobertura. O objetivo deste trabalho foi determinar a área foliar, o depósito e a cobertura de calda fungicida em soja em função de épocas de semeadura, populações de plantas e doses reduzidas de fungicidas. Experimentos de campo foram conduzidos nos anos agrícolas 2009/2010 e de 2010/2011, com a cultivar de ciclo médio MG/BR-46 (Conquista), sob infestação natural da ferrugem asiática. Nos estádios V8, R2 e R4 de desenvolvimento da cultura foram determinados a área foliar e o índice de área foliar (IAF) das plantas. As avaliações de depósito e cobertura foram realizadas no momento da primeira pulverização com os tratamentos fungicidas. Com a redução da população de plantas houve redução no IAF. Os depósitos e coberturas da calda aplicada não apresentaram aumento com a redução da população de plantas, apesar dos menores IAF. Os tratamentos fungicidas com tebuconazol e com azoxystrobina + ciproconazol apresentaram deposições semelhantes em todos os terços das plantas quando as plantas apresentaram menor desenvolvimento.EDUFU2019-10-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.ufu.br/index.php/biosciencejournal/article/view/4232310.14393/BJ-v35n5a2019-42323Bioscience Journal ; Vol. 35 No. 5 (2019): Sept./Oct.; 1422-1431Bioscience Journal ; v. 35 n. 5 (2019): Sept./Oct.; 1422-14311981-3163reponame:Bioscience journal (Online)instname:Universidade Federal de Uberlândia (UFU)instacron:UFUenghttps://seer.ufu.br/index.php/biosciencejournal/article/view/42323/27064Brazil; ContemporaryCopyright (c) 2019 Giselle Feliciani Barbosa, Maria Aparecida Pessôa da Cruz Centurion, Marcelo da Costa Ferreira, Pedro Luís da Costa Aguiar Alveshttps://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccessBarbosa, Giselle FelicianiCenturion, Maria Aparecida Pessôa da CruzFerreira, Marcelo da CostaAlves, Pedro Luís da Costa Aguiar2022-01-26T02:48:17Zoai:ojs.www.seer.ufu.br:article/42323Revistahttps://seer.ufu.br/index.php/biosciencejournalPUBhttps://seer.ufu.br/index.php/biosciencejournal/oaibiosciencej@ufu.br||1981-31631516-3725opendoar:2022-01-26T02:48:17Bioscience journal (Online) - Universidade Federal de Uberlândia (UFU)false |
dc.title.none.fl_str_mv |
Fungicide spray coverage and deposition in soybean asian rust management Cobertura e depósito de calda fungicida no manejo da ferrugem asiática em soja |
title |
Fungicide spray coverage and deposition in soybean asian rust management |
spellingShingle |
Fungicide spray coverage and deposition in soybean asian rust management Barbosa, Giselle Feliciani Chemical control Sowing season Leaf area index Phakopsora pachyrhizi Sydow and P. Sydow Plant population Agricultural Sciences |
title_short |
Fungicide spray coverage and deposition in soybean asian rust management |
title_full |
Fungicide spray coverage and deposition in soybean asian rust management |
title_fullStr |
Fungicide spray coverage and deposition in soybean asian rust management |
title_full_unstemmed |
Fungicide spray coverage and deposition in soybean asian rust management |
title_sort |
Fungicide spray coverage and deposition in soybean asian rust management |
author |
Barbosa, Giselle Feliciani |
author_facet |
Barbosa, Giselle Feliciani Centurion, Maria Aparecida Pessôa da Cruz Ferreira, Marcelo da Costa Alves, Pedro Luís da Costa Aguiar |
author_role |
author |
author2 |
Centurion, Maria Aparecida Pessôa da Cruz Ferreira, Marcelo da Costa Alves, Pedro Luís da Costa Aguiar |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Barbosa, Giselle Feliciani Centurion, Maria Aparecida Pessôa da Cruz Ferreira, Marcelo da Costa Alves, Pedro Luís da Costa Aguiar |
dc.subject.por.fl_str_mv |
Chemical control Sowing season Leaf area index Phakopsora pachyrhizi Sydow and P. Sydow Plant population Agricultural Sciences |
topic |
Chemical control Sowing season Leaf area index Phakopsora pachyrhizi Sydow and P. Sydow Plant population Agricultural Sciences |
description |
At maximum vegetative growth, sprays with fungicide to control Asian rust (Phakopsora pachyrhizi Sydow and P. Sydow) should reach high canopy penetration and plant coverage. Therefore, the central objective of this study was to determine leaf area, spray deposition, and plant coverage by fungicides sprayed on soybeans as a function of sowing seasons and plant population densities with reduced doses of tebuconazole and azoxystrobin + cyproconazole. Field experiments were conducted in the 2009/2010 and 2010/2011 crop years, using a medium-cycle soybean cultivar MG/BR–46 (Conquista) under a natural infestation of Asian soybean rust. Leaf area (LA) and leaf area index (LAI) were measured at three developmental stages (V8, R2, and R4). Spray deposition and coverage were evaluated during the first fungicide spraying. As results, LAI decreased as plant population decreased. Despite the lower LAIs, smaller plant populations had no effect on spray deposition and plant coverage. Both fungicides presented similar depositions on all thirds when plants had lower development. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-10-09 |
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.ufu.br/index.php/biosciencejournal/article/view/42323 10.14393/BJ-v35n5a2019-42323 |
url |
https://seer.ufu.br/index.php/biosciencejournal/article/view/42323 |
identifier_str_mv |
10.14393/BJ-v35n5a2019-42323 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://seer.ufu.br/index.php/biosciencejournal/article/view/42323/27064 |
dc.rights.driver.fl_str_mv |
https://creativecommons.org/licenses/by/4.0 info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by/4.0 |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.coverage.none.fl_str_mv |
Brazil; Contemporary |
dc.publisher.none.fl_str_mv |
EDUFU |
publisher.none.fl_str_mv |
EDUFU |
dc.source.none.fl_str_mv |
Bioscience Journal ; Vol. 35 No. 5 (2019): Sept./Oct.; 1422-1431 Bioscience Journal ; v. 35 n. 5 (2019): Sept./Oct.; 1422-1431 1981-3163 reponame:Bioscience journal (Online) instname:Universidade Federal de Uberlândia (UFU) instacron:UFU |
instname_str |
Universidade Federal de Uberlândia (UFU) |
instacron_str |
UFU |
institution |
UFU |
reponame_str |
Bioscience journal (Online) |
collection |
Bioscience journal (Online) |
repository.name.fl_str_mv |
Bioscience journal (Online) - Universidade Federal de Uberlândia (UFU) |
repository.mail.fl_str_mv |
biosciencej@ufu.br|| |
_version_ |
1797069080321064960 |