Efeito de fungicidas no processo infeccioso de Phakopsora pachyrhisi
Autor(a) principal: | |
---|---|
Data de Publicação: | 2010 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Biblioteca de teses e dissertações da Universidade de Passo Fundo (BDTD UPF) |
Texto Completo: | http://10.0.217.128:8080/jspui/handle/tede/548 |
Resumo: | Soybean crop occupies one of the most important highlights in the scenario of Brazilian agribusiness and in the world. The diseases are among the main causes of the reduction of grain yield. From 2000/01 the asian soybean rust has become the main disease of the crop in Brazil. Countless work has been done to develop resistant cultivars. However, with no success. For this reason, until now, the main control measure of the disease is the use of fungicides application above found organs. In recent years, much has been discussed about the effect of fungicide in preventive, curative and eradicative application. Furthermore, although many studies have been conducted evaluating the effect of fungicides in the control of asian soybean rust, the results are still limited to only certain fungicides, and only a little information available concerning the major fungicides used at this time. The objective of this study was to evaluate the effect of triazole fungicides and mixtures of triazoles + strobilurins in preventive, curative application (latent infections), and the eradicative effect on uredia and spores. Fungicides chlorothalonil, flutriafol, tebuconazole, cyproconazole + trifloxystrobin, epoxiconazole + pyraclostrobin, cyproconazole + azoxystrobin and cyproconazole + picoxystrobin were evaluated. Initially, in growth chamber the effect of adjuvant polyoxyethylene sorbitane monolaurate (Tween 20%) in concentrations of 0, 30, 60, 120, 240, 480 and 960 μL.L-1 and a fixed concentration of 2 x 104 uredospores.mL-1 were evaluated. In the second phase the following concentrations 0, 5 x 103, 1 x 104, 2 x 104, 4 x 104, 8 x 104, and 16 x 104 uredospores.mL-1 and the concentration of the spreader in 240 μL.L-1, selected in the previous experiment were tested. The curative and eradicative fungicides effect were evaluated after inoculation of the concentration of 5 x 103 uredosporos.mL-1 with the addition of adjuvant 240 μL.L-1 of water. And finally, in the field, protection period and eradicative effect of fungicides in the control of asian soybean rust were assessed. It was determined that the best concentration of adjuvant was 240 μL.L-1 of water, and the best concentration of uredospores was 4 x 104.mL-1, however, it was used the concentration of 5 x 103 uredosporos.mL-1. Finally, the period of protection of fungicides flutriafol, tebuconazole and cyproconazole + trifloxystrobin was 14 days, and 25 days for fungicides epoxiconazole + pyraclostrobin, cyproconazole + azoxystrobin and cyproconazole + picoxystrobin. The eradicative effect of fungicides in the first season was higher for mixtures of fungicides and in the second season there was no difference |
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Reis, Erlei MeloCPF:00829897020http://lattes.cnpq.br/6225704270607677CPF:93206097053http://lattes.cnpq.br/6882363213862383Zanatta, Tiago2018-01-10T18:03:06Z2015-08-282010-03-02ZANATTA, Tiago. Efeito de fungicidas no processo infeccioso de Phakopsora pachyrhisi. 2010. 120 f. Dissertação (Mestrado em Ciências Agrárias) - Universidade de Passo Fundo, Passo Fundo, 2010.http://10.0.217.128:8080/jspui/handle/tede/548Soybean crop occupies one of the most important highlights in the scenario of Brazilian agribusiness and in the world. The diseases are among the main causes of the reduction of grain yield. From 2000/01 the asian soybean rust has become the main disease of the crop in Brazil. Countless work has been done to develop resistant cultivars. However, with no success. For this reason, until now, the main control measure of the disease is the use of fungicides application above found organs. In recent years, much has been discussed about the effect of fungicide in preventive, curative and eradicative application. Furthermore, although many studies have been conducted evaluating the effect of fungicides in the control of asian soybean rust, the results are still limited to only certain fungicides, and only a little information available concerning the major fungicides used at this time. The objective of this study was to evaluate the effect of triazole fungicides and mixtures of triazoles + strobilurins in preventive, curative application (latent infections), and the eradicative effect on uredia and spores. Fungicides chlorothalonil, flutriafol, tebuconazole, cyproconazole + trifloxystrobin, epoxiconazole + pyraclostrobin, cyproconazole + azoxystrobin and cyproconazole + picoxystrobin were evaluated. Initially, in growth chamber the effect of adjuvant polyoxyethylene sorbitane monolaurate (Tween 20%) in concentrations of 0, 30, 60, 120, 240, 480 and 960 μL.L-1 and a fixed concentration of 2 x 104 uredospores.mL-1 were evaluated. In the second phase the following concentrations 0, 5 x 103, 1 x 104, 2 x 104, 4 x 104, 8 x 104, and 16 x 104 uredospores.mL-1 and the concentration of the spreader in 240 μL.L-1, selected in the previous experiment were tested. The curative and eradicative fungicides effect were evaluated after inoculation of the concentration of 5 x 103 uredosporos.mL-1 with the addition of adjuvant 240 μL.L-1 of water. And finally, in the field, protection period and eradicative effect of fungicides in the control of asian soybean rust were assessed. It was determined that the best concentration of adjuvant was 240 μL.L-1 of water, and the best concentration of uredospores was 4 x 104.mL-1, however, it was used the concentration of 5 x 103 uredosporos.mL-1. Finally, the period of protection of fungicides flutriafol, tebuconazole and cyproconazole + trifloxystrobin was 14 days, and 25 days for fungicides epoxiconazole + pyraclostrobin, cyproconazole + azoxystrobin and cyproconazole + picoxystrobin. The eradicative effect of fungicides in the first season was higher for mixtures of fungicides and in the second season there was no differenceA cultura da soja ocupa uma das mais importantes commodities no cenário do agronegócio brasileiro e mundial. As doenças estão entre as principais causas da redução do rendimento de grãos. A partir de 2000/01 a ferrugem asiática da soja se tornou a principal doença da cultura no Brasil. Grande volume de trabalho tem sido feito visando à seleção de cultivares resistente, sem obter sucesso. Por esta razão, até o momento, a principal medida de controle da moléstia é o uso de fungicidas aplicados nos órgãos aéreos. Nos últimos anos, muito tem se falado do efeito de fungicidas em aplicação preventiva, curativa e erradicante. Por outro lado, embora inúmeras pesquisas já foram conduzidas avaliando o efeito de fungicidas no controle da ferrugem asiática da soja, as informações ainda são limitadas a somente alguns fungicidas e, são escassas referentes ao seu efeito no processo infeccioso. Para tanto, o objetivo deste trabalho foi avaliar o efeito de fungicidas triazóis e misturas de triazóis + estrobilurinas em aplicação preventiva, curativa sobre infecções latentes/virtuais e, a ação erradicante sobre urédias esporulantes. Avaliou-se os fungicidas clorotalonil, flutriafol, tebuconazol, ciproconazol + trifloxistrobina, epoxiconazol + piraclostrobina, ciproconazol + azoxistrobina e ciproconazol + picoxistrobina. Inicialmente, em câmara climatizada, avaliou-se o efeito de concentrações do adjuvante polioxietileno sorbitano monolaurato 0, 30, 60, 120, 240, 480 e 960 μL.L-1 fixando-se uma concentração de 2 x 104 uredosporos.mL-1. Na segunda fase inoculou-se as seguintes concentrações 0, 5 x 103, 1 x 104, 2 x 104, 4 x 104, 8 x 104 e 16 x 104 uredosporos.mL-1 e fixando-se a concentração do espalhante em 240 μL.L-1, selecionada no experimento anterior. Na seqüência, o efeito curativo e erradicante de fungicidas foi avaliado após a inoculação da concentração de 5 x 103 uredosporos.mL-1 com a adição de adjuvante 240 μL.L-1 de água. E finalmente, no campo, avaliou-se o período de proteção e o efeito erradicante de fungicidas no controle da ferrugem asiática da soja. As concentrações de adjuvante acima de 240 μL.L-1 possibilitaram a máxima intensidade da doença e, a intensidade da doença aumentou com o acréscimo das concentrações de uredosporos. Por fim, o período de proteção dos fungicidas flutriafol, tebuconazol e ciproconazol + trifloxistrobina foi de 14 dias e, 25 dias para os fungicidas epoxiconazol + piraclostrobina, ciproconazol + azoxistrobina e ciproconazol + picoxistrobina. As misturas de fungicidas apresentaram maior ação erradicante na primeira época e na segunda época não houve diferençaMade available in DSpace on 2018-01-10T18:03:06Z (GMT). No. of bitstreams: 1 2009TiagoZanatta.pdf: 1252979 bytes, checksum: 3c0444830319871e91a1b9c1b4c5e2c8 (MD5) Previous issue date: 2010-03-02application/pdfporUniversidade de Passo FundoPrograma de Pós-Graduação em AgronomiaUPFBRCiências AgráriasAgronomiaFitopatologiaSoja - Doenças e pragasFungicidasAgronomyPhytopathologySoy - Diseases and pestsFungicidesCNPQ::CIENCIAS AGRARIAS::AGRONOMIAEfeito de fungicidas no processo infeccioso de Phakopsora pachyrhisiinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/openAccessreponame:Biblioteca de teses e dissertações da Universidade de Passo Fundo (BDTD UPF)instname:Universidade de Passo Fundo (UPF)instacron:UPFORIGINAL2009TiagoZanatta.pdfapplication/pdf1252979http://tede.upf.br:8080/jspui/bitstream/tede/548/1/2009TiagoZanatta.pdf3c0444830319871e91a1b9c1b4c5e2c8MD51tede/5482018-01-10 16:03:06.798oai:tede.upf.br:tede/548Biblioteca Digital de Teses e DissertaçõesPUBhttp://tede.upf.br/oai/requestbiblio@upf.br || bio@upf.br || cas@upf.br || car@upf.br || lve@upf.br || sar@upf.br || sol@upf.br || upfmundi@upf.br || jucelei@upf.bropendoar:2018-01-10T18:03:06Biblioteca de teses e dissertações da Universidade de Passo Fundo (BDTD UPF) - Universidade de Passo Fundo (UPF)false |
dc.title.por.fl_str_mv |
Efeito de fungicidas no processo infeccioso de Phakopsora pachyrhisi |
title |
Efeito de fungicidas no processo infeccioso de Phakopsora pachyrhisi |
spellingShingle |
Efeito de fungicidas no processo infeccioso de Phakopsora pachyrhisi Zanatta, Tiago Agronomia Fitopatologia Soja - Doenças e pragas Fungicidas Agronomy Phytopathology Soy - Diseases and pests Fungicides CNPQ::CIENCIAS AGRARIAS::AGRONOMIA |
title_short |
Efeito de fungicidas no processo infeccioso de Phakopsora pachyrhisi |
title_full |
Efeito de fungicidas no processo infeccioso de Phakopsora pachyrhisi |
title_fullStr |
Efeito de fungicidas no processo infeccioso de Phakopsora pachyrhisi |
title_full_unstemmed |
Efeito de fungicidas no processo infeccioso de Phakopsora pachyrhisi |
title_sort |
Efeito de fungicidas no processo infeccioso de Phakopsora pachyrhisi |
author |
Zanatta, Tiago |
author_facet |
Zanatta, Tiago |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Reis, Erlei Melo |
dc.contributor.advisor1ID.fl_str_mv |
CPF:00829897020 |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/6225704270607677 |
dc.contributor.authorID.fl_str_mv |
CPF:93206097053 |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/6882363213862383 |
dc.contributor.author.fl_str_mv |
Zanatta, Tiago |
contributor_str_mv |
Reis, Erlei Melo |
dc.subject.por.fl_str_mv |
Agronomia Fitopatologia Soja - Doenças e pragas Fungicidas |
topic |
Agronomia Fitopatologia Soja - Doenças e pragas Fungicidas Agronomy Phytopathology Soy - Diseases and pests Fungicides CNPQ::CIENCIAS AGRARIAS::AGRONOMIA |
dc.subject.eng.fl_str_mv |
Agronomy Phytopathology Soy - Diseases and pests Fungicides |
dc.subject.cnpq.fl_str_mv |
CNPQ::CIENCIAS AGRARIAS::AGRONOMIA |
description |
Soybean crop occupies one of the most important highlights in the scenario of Brazilian agribusiness and in the world. The diseases are among the main causes of the reduction of grain yield. From 2000/01 the asian soybean rust has become the main disease of the crop in Brazil. Countless work has been done to develop resistant cultivars. However, with no success. For this reason, until now, the main control measure of the disease is the use of fungicides application above found organs. In recent years, much has been discussed about the effect of fungicide in preventive, curative and eradicative application. Furthermore, although many studies have been conducted evaluating the effect of fungicides in the control of asian soybean rust, the results are still limited to only certain fungicides, and only a little information available concerning the major fungicides used at this time. The objective of this study was to evaluate the effect of triazole fungicides and mixtures of triazoles + strobilurins in preventive, curative application (latent infections), and the eradicative effect on uredia and spores. Fungicides chlorothalonil, flutriafol, tebuconazole, cyproconazole + trifloxystrobin, epoxiconazole + pyraclostrobin, cyproconazole + azoxystrobin and cyproconazole + picoxystrobin were evaluated. Initially, in growth chamber the effect of adjuvant polyoxyethylene sorbitane monolaurate (Tween 20%) in concentrations of 0, 30, 60, 120, 240, 480 and 960 μL.L-1 and a fixed concentration of 2 x 104 uredospores.mL-1 were evaluated. In the second phase the following concentrations 0, 5 x 103, 1 x 104, 2 x 104, 4 x 104, 8 x 104, and 16 x 104 uredospores.mL-1 and the concentration of the spreader in 240 μL.L-1, selected in the previous experiment were tested. The curative and eradicative fungicides effect were evaluated after inoculation of the concentration of 5 x 103 uredosporos.mL-1 with the addition of adjuvant 240 μL.L-1 of water. And finally, in the field, protection period and eradicative effect of fungicides in the control of asian soybean rust were assessed. It was determined that the best concentration of adjuvant was 240 μL.L-1 of water, and the best concentration of uredospores was 4 x 104.mL-1, however, it was used the concentration of 5 x 103 uredosporos.mL-1. Finally, the period of protection of fungicides flutriafol, tebuconazole and cyproconazole + trifloxystrobin was 14 days, and 25 days for fungicides epoxiconazole + pyraclostrobin, cyproconazole + azoxystrobin and cyproconazole + picoxystrobin. The eradicative effect of fungicides in the first season was higher for mixtures of fungicides and in the second season there was no difference |
publishDate |
2010 |
dc.date.issued.fl_str_mv |
2010-03-02 |
dc.date.available.fl_str_mv |
2015-08-28 |
dc.date.accessioned.fl_str_mv |
2018-01-10T18:03:06Z |
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dc.identifier.citation.fl_str_mv |
ZANATTA, Tiago. Efeito de fungicidas no processo infeccioso de Phakopsora pachyrhisi. 2010. 120 f. Dissertação (Mestrado em Ciências Agrárias) - Universidade de Passo Fundo, Passo Fundo, 2010. |
dc.identifier.uri.fl_str_mv |
http://10.0.217.128:8080/jspui/handle/tede/548 |
identifier_str_mv |
ZANATTA, Tiago. Efeito de fungicidas no processo infeccioso de Phakopsora pachyrhisi. 2010. 120 f. Dissertação (Mestrado em Ciências Agrárias) - Universidade de Passo Fundo, Passo Fundo, 2010. |
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Ciências Agrárias |
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Universidade de Passo Fundo |
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Biblioteca de teses e dissertações da Universidade de Passo Fundo (BDTD UPF) |
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