Potassium phosphite pre- and post-infection activities against Phakopsora euvitis in grapevine leaves
Autor(a) principal: | |
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Data de Publicação: | 2013 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Semina. Ciências Agrárias (Online) |
Texto Completo: | https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/12287 |
Resumo: | Grapevine rust is caused by the fungus Phakopsora euvitis. It is a major foliar disease of grapevines in Brazil. In this study, the pre- and post-infection activities of potassium phosphite were compared to the standard grapevine fungicides copper hydroxide and tebuconazole. Experiments were conducted on ‘Niagara Rosada’ grapevines (Vitis labrusca) that were grown in pots. The plants were sprayed at two, five or eight days before (with protectant) or after (with a curative spray) inoculation with a urediniospore suspension (105 spores per mL) of P. euvitis until the suspension was running off the leaves. The resulting disease was quantified by the number of pustules per cm2 in four regions of each leaf blade in four leaves per plant. The pre-infection potassium phosphite treatment reduced pustule development by 64% when applied five days prior to rust inoculation, whereas the copper hydroxide and tebuconazole reduced pustule development by 99% and 100%, respectively. The potassium phosphite post-infection treatment reduced pustule development by 58% when applied two days after rust inoculation. The tebuconazole and copper hydroxide reduced disease development by 100% and 60%, respectively, following post-infection treatment. Potassium phosphite had a weaker post-infection activity against urediniospore germination than copper hydroxide. |
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Potassium phosphite pre- and post-infection activities against Phakopsora euvitis in grapevine leavesAtividade de fosfito de potássio na pré e pós-infecção de Phakopsora euvitis em folhas de videiraFungal diseasesControlFungiVitis.Doenças fúngicasControleFungosVitis.AgronomiaFitossanidadeControleGrapevine rust is caused by the fungus Phakopsora euvitis. It is a major foliar disease of grapevines in Brazil. In this study, the pre- and post-infection activities of potassium phosphite were compared to the standard grapevine fungicides copper hydroxide and tebuconazole. Experiments were conducted on ‘Niagara Rosada’ grapevines (Vitis labrusca) that were grown in pots. The plants were sprayed at two, five or eight days before (with protectant) or after (with a curative spray) inoculation with a urediniospore suspension (105 spores per mL) of P. euvitis until the suspension was running off the leaves. The resulting disease was quantified by the number of pustules per cm2 in four regions of each leaf blade in four leaves per plant. The pre-infection potassium phosphite treatment reduced pustule development by 64% when applied five days prior to rust inoculation, whereas the copper hydroxide and tebuconazole reduced pustule development by 99% and 100%, respectively. The potassium phosphite post-infection treatment reduced pustule development by 58% when applied two days after rust inoculation. The tebuconazole and copper hydroxide reduced disease development by 100% and 60%, respectively, following post-infection treatment. Potassium phosphite had a weaker post-infection activity against urediniospore germination than copper hydroxide. A ferrugem da videira, causada pelo fungo Phakopsora euvitis, é uma das principais doenças foliares da videira no Brasil. Este trabalho avaliou a atividade de fosfito de potássio na pré e pós-infecção da ferrugem da videira, comparativamente aos fungicidas hidróxido de cobre e tebuconazol. Os experimentos foram realizados com plantas de videira ‘Niágara Rosada’ com seis folhas (Vitis labrusca) cultivadas em vasos, em câmara de crescimento. As plantas foram pulverizadas com fungicidas até o ponto de escorrimento aos dois, cinco ou oito dias antes (efeito protetivo) ou após (efeito curativo) a inoculação com uma suspensão de urediniósporos (105 esporos por mL) de P. euvitis. Para quantificar a doença, foi avaliado o número de pústulas por cm2 em quatro regiões do limbo foliar, de quatro folhas por planta. Em tratamento pré-infecção, o fosfito de potássio reduziu a quantidade de pústulas em até 64%, quando aplicado até cinco dias antes da inoculação em relação ao tebuconazol. Hidróxido de cobre reduziu a quantidade de pústulas em 99%. Em aplicações pós-infecção, fosfito de potássio reduziu a quantidade de pústulas em até 58%, quando aplicado até dois dias antes da inoculação comparado a testemunha. Hidróxido de cobre reduziu a quantidade de pústulas em 60%. O tratamento pós-infecção com fosfito de potássio foi menos eficaz na redução da germinação de urediniósporos do que o tratamento com hidróxido de cobre. UEL2013-12-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionPesquisaapplication/pdfhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/1228710.5433/1679-0359.2013v34n6Supl1p3333Semina: Ciências Agrárias; Vol. 34 No. 6Supl1 (2013); 3333-3340Semina: Ciências Agrárias; v. 34 n. 6Supl1 (2013); 3333-33401679-03591676-546Xreponame:Semina. Ciências Agrárias (Online)instname:Universidade Estadual de Londrina (UEL)instacron:UELporhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/12287/pdf_71Buffara, Cláudia Regina ScapinAngelotti, FrancisleneTessmann, Dauri JoséSouza, Carolina Domingues deVida, João Batistainfo:eu-repo/semantics/openAccess2015-11-19T18:36:12Zoai:ojs.pkp.sfu.ca:article/12287Revistahttp://www.uel.br/revistas/uel/index.php/semagrariasPUBhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/oaisemina.agrarias@uel.br1679-03591676-546Xopendoar:2015-11-19T18:36:12Semina. Ciências Agrárias (Online) - Universidade Estadual de Londrina (UEL)false |
dc.title.none.fl_str_mv |
Potassium phosphite pre- and post-infection activities against Phakopsora euvitis in grapevine leaves Atividade de fosfito de potássio na pré e pós-infecção de Phakopsora euvitis em folhas de videira |
title |
Potassium phosphite pre- and post-infection activities against Phakopsora euvitis in grapevine leaves |
spellingShingle |
Potassium phosphite pre- and post-infection activities against Phakopsora euvitis in grapevine leaves Buffara, Cláudia Regina Scapin Fungal diseases Control Fungi Vitis. Doenças fúngicas Controle Fungos Vitis. Agronomia Fitossanidade Controle |
title_short |
Potassium phosphite pre- and post-infection activities against Phakopsora euvitis in grapevine leaves |
title_full |
Potassium phosphite pre- and post-infection activities against Phakopsora euvitis in grapevine leaves |
title_fullStr |
Potassium phosphite pre- and post-infection activities against Phakopsora euvitis in grapevine leaves |
title_full_unstemmed |
Potassium phosphite pre- and post-infection activities against Phakopsora euvitis in grapevine leaves |
title_sort |
Potassium phosphite pre- and post-infection activities against Phakopsora euvitis in grapevine leaves |
author |
Buffara, Cláudia Regina Scapin |
author_facet |
Buffara, Cláudia Regina Scapin Angelotti, Francislene Tessmann, Dauri José Souza, Carolina Domingues de Vida, João Batista |
author_role |
author |
author2 |
Angelotti, Francislene Tessmann, Dauri José Souza, Carolina Domingues de Vida, João Batista |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Buffara, Cláudia Regina Scapin Angelotti, Francislene Tessmann, Dauri José Souza, Carolina Domingues de Vida, João Batista |
dc.subject.por.fl_str_mv |
Fungal diseases Control Fungi Vitis. Doenças fúngicas Controle Fungos Vitis. Agronomia Fitossanidade Controle |
topic |
Fungal diseases Control Fungi Vitis. Doenças fúngicas Controle Fungos Vitis. Agronomia Fitossanidade Controle |
description |
Grapevine rust is caused by the fungus Phakopsora euvitis. It is a major foliar disease of grapevines in Brazil. In this study, the pre- and post-infection activities of potassium phosphite were compared to the standard grapevine fungicides copper hydroxide and tebuconazole. Experiments were conducted on ‘Niagara Rosada’ grapevines (Vitis labrusca) that were grown in pots. The plants were sprayed at two, five or eight days before (with protectant) or after (with a curative spray) inoculation with a urediniospore suspension (105 spores per mL) of P. euvitis until the suspension was running off the leaves. The resulting disease was quantified by the number of pustules per cm2 in four regions of each leaf blade in four leaves per plant. The pre-infection potassium phosphite treatment reduced pustule development by 64% when applied five days prior to rust inoculation, whereas the copper hydroxide and tebuconazole reduced pustule development by 99% and 100%, respectively. The potassium phosphite post-infection treatment reduced pustule development by 58% when applied two days after rust inoculation. The tebuconazole and copper hydroxide reduced disease development by 100% and 60%, respectively, following post-infection treatment. Potassium phosphite had a weaker post-infection activity against urediniospore germination than copper hydroxide. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013-12-06 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Pesquisa |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/12287 10.5433/1679-0359.2013v34n6Supl1p3333 |
url |
https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/12287 |
identifier_str_mv |
10.5433/1679-0359.2013v34n6Supl1p3333 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/12287/pdf_71 |
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 |
UEL |
publisher.none.fl_str_mv |
UEL |
dc.source.none.fl_str_mv |
Semina: Ciências Agrárias; Vol. 34 No. 6Supl1 (2013); 3333-3340 Semina: Ciências Agrárias; v. 34 n. 6Supl1 (2013); 3333-3340 1679-0359 1676-546X reponame:Semina. Ciências Agrárias (Online) instname:Universidade Estadual de Londrina (UEL) instacron:UEL |
instname_str |
Universidade Estadual de Londrina (UEL) |
instacron_str |
UEL |
institution |
UEL |
reponame_str |
Semina. Ciências Agrárias (Online) |
collection |
Semina. Ciências Agrárias (Online) |
repository.name.fl_str_mv |
Semina. Ciências Agrárias (Online) - Universidade Estadual de Londrina (UEL) |
repository.mail.fl_str_mv |
semina.agrarias@uel.br |
_version_ |
1799306067358777344 |