Evaluation of fosfites to control downy mildew in grapevines

Bibliographic Details
Main Author: Dalbó, Marco Antonio
Publication Date: 2021
Other Authors: Schuck, Enio
Format: Article
Language: por
Source: Agropecuária Catarinense (Online)
Download full: https://publicacoes.epagri.sc.gov.br/rac/article/view/1022
Summary: Downy mildew is one of the most important grape diseases in Southern Brazil. The disease is usuallycontrolled with preventive fungicide sprays. During the season 2000/01, which was very favorable to the disease development, it was evaluated the effect of potassium fosfite to control downy mildew compared to traditional fungicides. Preventive sprays of potassium fosfite, at intervals of seven to nine days, efficiently controlled the disease, similarly the other systemic fungicides tested (metalaxyl, cimoxanil e benalaxyl), which are standard fungicides to control downy mildew. However, phytotoxicity symptoms appeared during the experiment due to frequent sprays with fosfite. In another experiment, it was evaluated the curative effect of fosfites applied after the appearance of foliar symptoms of the disease. In that conditions, treatments with potassium fosfite resultedin the best control among the tested options. Considering the aspects of efficiency, cost and environmental risk, the use of fosfites can be recommended to control grape downy mildew with the precaution of alternating treatments with other fungicides to avoid phytotoxicity problems when a high number of sprays is needed.
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spelling Evaluation of fosfites to control downy mildew in grapevinesAvaliação do uso de fosfitos para o controle do míldio da videiraVitisPlasmopara viticolauvafungicida.VitisPlasmopara viticolagrapefungicideDowny mildew is one of the most important grape diseases in Southern Brazil. The disease is usuallycontrolled with preventive fungicide sprays. During the season 2000/01, which was very favorable to the disease development, it was evaluated the effect of potassium fosfite to control downy mildew compared to traditional fungicides. Preventive sprays of potassium fosfite, at intervals of seven to nine days, efficiently controlled the disease, similarly the other systemic fungicides tested (metalaxyl, cimoxanil e benalaxyl), which are standard fungicides to control downy mildew. However, phytotoxicity symptoms appeared during the experiment due to frequent sprays with fosfite. In another experiment, it was evaluated the curative effect of fosfites applied after the appearance of foliar symptoms of the disease. In that conditions, treatments with potassium fosfite resultedin the best control among the tested options. Considering the aspects of efficiency, cost and environmental risk, the use of fosfites can be recommended to control grape downy mildew with the precaution of alternating treatments with other fungicides to avoid phytotoxicity problems when a high number of sprays is needed. O míldio é uma das principais doenças da videira nas condições do Sul do Brasil. O controle desta doença é feito normalmente através da aplicação preventiva de fungicidas. Durante o ciclo vegetativo 2000/01, que foi muito favorável à doença, avaliou-se o efeito do fosfito de potássio no controle da doença comparado com fungicidas tradicionais. Aplicações preventivas de fosfito, com intervalo entre aplicações de sete a nove dias, controlaram eficientemente a doença, de maneira semelhante a outros fungicidas sistêmicos testados (metalaxyl, cymoxanil e benalaxyl), que são fungicidas-padrão para o controle da doença. Entretanto, no decorrer do experimento, ocorreram sintomas de fitotoxicidade, decorrentes de aplicações muito freqüentes do produto. Emoutro experimento, avaliou-se o efeito curativo do fosfito em aplicações posteriores ao aparecimento de sintomas foliares da doença. Nestas condições, os tratamentos com fosfito de potássio proporcionaram o melhor controleda doença, dentre as opções testadas. Considerando-se os aspectos de eficiência, custo e risco ambiental, o uso de fosfitos pode ser recomendado para o controle do míldio da videira, tomando-se o cuidado de alternar tratamentos com outros fungicidas para evitar problemas de fitotoxicidade quando for necessário um número elevado de aplicações.Empresa de Pesquisa Agropecuária e Extensão Rural de Santa Catarina - Epagri2021-07-28info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://publicacoes.epagri.sc.gov.br/rac/article/view/1022Agropecuária Catarinense Journal; Vol. 16 No. 3 (2003); 33-35Agropecuária Catarinense; v. 16 n. 3 (2003); 33-352525-60760103-0779reponame:Agropecuária Catarinense (Online)instname:Empresa de Pesquisa Agropecuária e Extensão Rural de Santa Catarina (Epagri)instacron:EPAGRIporhttps://publicacoes.epagri.sc.gov.br/rac/article/view/1022/918Copyright (c) 2003 Agropecuaria catarinensehttps://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccessDalbó, Marco AntonioSchuck, Enio2021-07-28T17:12:38Zoai:ojs.publicacoes.epagri.sc.gov.br:article/1022Revistahttps://publicacoes.epagri.sc.gov.br/RAC/indexPUBhttps://publicacoes.epagri.sc.gov.br/index.php/RAC/oaieditoriarac@epagri.sc.gov.br || lamperuch@epagri.sc.gov.br2525-60760103-0779opendoar:2021-07-28T17:12:38Agropecuária Catarinense (Online) - Empresa de Pesquisa Agropecuária e Extensão Rural de Santa Catarina (Epagri)false
dc.title.none.fl_str_mv Evaluation of fosfites to control downy mildew in grapevines
Avaliação do uso de fosfitos para o controle do míldio da videira
title Evaluation of fosfites to control downy mildew in grapevines
spellingShingle Evaluation of fosfites to control downy mildew in grapevines
Dalbó, Marco Antonio
Vitis
Plasmopara viticola
uva
fungicida.
Vitis
Plasmopara viticola
grape
fungicide
title_short Evaluation of fosfites to control downy mildew in grapevines
title_full Evaluation of fosfites to control downy mildew in grapevines
title_fullStr Evaluation of fosfites to control downy mildew in grapevines
title_full_unstemmed Evaluation of fosfites to control downy mildew in grapevines
title_sort Evaluation of fosfites to control downy mildew in grapevines
author Dalbó, Marco Antonio
author_facet Dalbó, Marco Antonio
Schuck, Enio
author_role author
author2 Schuck, Enio
author2_role author
dc.contributor.author.fl_str_mv Dalbó, Marco Antonio
Schuck, Enio
dc.subject.por.fl_str_mv Vitis
Plasmopara viticola
uva
fungicida.
Vitis
Plasmopara viticola
grape
fungicide
topic Vitis
Plasmopara viticola
uva
fungicida.
Vitis
Plasmopara viticola
grape
fungicide
description Downy mildew is one of the most important grape diseases in Southern Brazil. The disease is usuallycontrolled with preventive fungicide sprays. During the season 2000/01, which was very favorable to the disease development, it was evaluated the effect of potassium fosfite to control downy mildew compared to traditional fungicides. Preventive sprays of potassium fosfite, at intervals of seven to nine days, efficiently controlled the disease, similarly the other systemic fungicides tested (metalaxyl, cimoxanil e benalaxyl), which are standard fungicides to control downy mildew. However, phytotoxicity symptoms appeared during the experiment due to frequent sprays with fosfite. In another experiment, it was evaluated the curative effect of fosfites applied after the appearance of foliar symptoms of the disease. In that conditions, treatments with potassium fosfite resultedin the best control among the tested options. Considering the aspects of efficiency, cost and environmental risk, the use of fosfites can be recommended to control grape downy mildew with the precaution of alternating treatments with other fungicides to avoid phytotoxicity problems when a high number of sprays is needed.
publishDate 2021
dc.date.none.fl_str_mv 2021-07-28
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://publicacoes.epagri.sc.gov.br/rac/article/view/1022
url https://publicacoes.epagri.sc.gov.br/rac/article/view/1022
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://publicacoes.epagri.sc.gov.br/rac/article/view/1022/918
dc.rights.driver.fl_str_mv Copyright (c) 2003 Agropecuaria catarinense
https://creativecommons.org/licenses/by/4.0
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright (c) 2003 Agropecuaria catarinense
https://creativecommons.org/licenses/by/4.0
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Empresa de Pesquisa Agropecuária e Extensão Rural de Santa Catarina - Epagri
publisher.none.fl_str_mv Empresa de Pesquisa Agropecuária e Extensão Rural de Santa Catarina - Epagri
dc.source.none.fl_str_mv Agropecuária Catarinense Journal; Vol. 16 No. 3 (2003); 33-35
Agropecuária Catarinense; v. 16 n. 3 (2003); 33-35
2525-6076
0103-0779
reponame:Agropecuária Catarinense (Online)
instname:Empresa de Pesquisa Agropecuária e Extensão Rural de Santa Catarina (Epagri)
instacron:EPAGRI
instname_str Empresa de Pesquisa Agropecuária e Extensão Rural de Santa Catarina (Epagri)
instacron_str EPAGRI
institution EPAGRI
reponame_str Agropecuária Catarinense (Online)
collection Agropecuária Catarinense (Online)
repository.name.fl_str_mv Agropecuária Catarinense (Online) - Empresa de Pesquisa Agropecuária e Extensão Rural de Santa Catarina (Epagri)
repository.mail.fl_str_mv editoriarac@epagri.sc.gov.br || lamperuch@epagri.sc.gov.br
_version_ 1754917260881821696

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