Elephantopus mollis Kunth (Asteraceae): fluxo de emergência e curva de dose-resposta a herbicidas
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Manancial - Repositório Digital da UFSM |
Texto Completo: | http://repositorio.ufsm.br/handle/1/4906 |
Resumo: | Elephantopus mollis is a Asteraceae family species recently found in soybean crops / winter pastures in the central-western region of Rio Grande do Sul, Brazil. Its presence has reduced yields and increased the cost of production of these crops. In order to get the emergency pattern of the species throughout the year and its sensitivity to the main herbicide used in these crops it is that took place this work. To determine the emergency flow and the seed bank in the area two experiments were conducted in a rural area of the municipality of Tupanciretã, and for the response to herbicides were conducted five trials of dose-response curves to the herbicide glyphosate, 2, 4-D, metsulfuron-methyl, flumioxazin and saflufenacil. In the emergency experiments it have been demarcated two areas side by side. One kept uncroped and another subjected to the usual crop of the total area. In both areas, treatments were represented by twelve months of the year to carry out the count of emerged plants for each month. The samples to estimate the seed bank were collected in the month of August in each of the twelve portions of the area kept uncroped in the depths of 0 to 5 cm and 5 to 10 cm. In trays kept in a greenhouse (UFSM), counts were made of emerged plants, every 15 days for 150 days. For dose-response curves were established doses and represents the division multiple of the recommended dose of herbicide for similar species as 0; x / 8; x / 4; x / 2; x; 2x; 4x; 8x. For glyphosate x = 1440 g ha-1, 2,4-D x = 670 g ha-1, metsulfuron x = 2.4 g ai ha-1, flumioxazin x = 50 g ai ha-1 and saflufenacil x = 35 g ai ha-1. Herbicide treatments were applied to plants with 8 to 10 leaves. The variables were visual assessment of control (%) (range 0-100) at 3, 7, 14, 21 and 28 days after treatments and the mass of green and dry matter of roots and shoots, producing the total mass and relative, by its expression as a percentage of treatment without herbicide to 28 days. The results show that E. mollis emerges during all months of the year, with major emergencies in the months of November, February and May. But the seed bank pointed to the presence in the average of all samples of 400 seeds m2 of E. mollis in the 0 to 5 cm and inexpressive 5 to 10 cm. There was a weak correlation between the emerged plants and seed bank, proving to be the most intense emergency probably due to soil temperature for the months of November, February and May. It can be suggested that emergency peaks coincide with the time of implantation of cultures and thus represent the best opportunities to make up the control. The results found with the curves show that glyphosate and 2,4-D are not efficient in the control and can not conclude on the efficiency metsulfuron, flumioxazin and saflufenacil. |
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2016-08-042016-08-042016-03-10BALBINOT, Andrisa. Elephantopus mollis Kunth (Asteraceae): emergency flow and herbicides dose-response curves. 2016. 71 f. Dissertação (Mestrado em Ciências Biológicas) - Universidade Federal de Santa Maria, Santa Maria, 2016.http://repositorio.ufsm.br/handle/1/4906Elephantopus mollis is a Asteraceae family species recently found in soybean crops / winter pastures in the central-western region of Rio Grande do Sul, Brazil. Its presence has reduced yields and increased the cost of production of these crops. In order to get the emergency pattern of the species throughout the year and its sensitivity to the main herbicide used in these crops it is that took place this work. To determine the emergency flow and the seed bank in the area two experiments were conducted in a rural area of the municipality of Tupanciretã, and for the response to herbicides were conducted five trials of dose-response curves to the herbicide glyphosate, 2, 4-D, metsulfuron-methyl, flumioxazin and saflufenacil. In the emergency experiments it have been demarcated two areas side by side. One kept uncroped and another subjected to the usual crop of the total area. In both areas, treatments were represented by twelve months of the year to carry out the count of emerged plants for each month. The samples to estimate the seed bank were collected in the month of August in each of the twelve portions of the area kept uncroped in the depths of 0 to 5 cm and 5 to 10 cm. In trays kept in a greenhouse (UFSM), counts were made of emerged plants, every 15 days for 150 days. For dose-response curves were established doses and represents the division multiple of the recommended dose of herbicide for similar species as 0; x / 8; x / 4; x / 2; x; 2x; 4x; 8x. For glyphosate x = 1440 g ha-1, 2,4-D x = 670 g ha-1, metsulfuron x = 2.4 g ai ha-1, flumioxazin x = 50 g ai ha-1 and saflufenacil x = 35 g ai ha-1. Herbicide treatments were applied to plants with 8 to 10 leaves. The variables were visual assessment of control (%) (range 0-100) at 3, 7, 14, 21 and 28 days after treatments and the mass of green and dry matter of roots and shoots, producing the total mass and relative, by its expression as a percentage of treatment without herbicide to 28 days. The results show that E. mollis emerges during all months of the year, with major emergencies in the months of November, February and May. But the seed bank pointed to the presence in the average of all samples of 400 seeds m2 of E. mollis in the 0 to 5 cm and inexpressive 5 to 10 cm. There was a weak correlation between the emerged plants and seed bank, proving to be the most intense emergency probably due to soil temperature for the months of November, February and May. It can be suggested that emergency peaks coincide with the time of implantation of cultures and thus represent the best opportunities to make up the control. The results found with the curves show that glyphosate and 2,4-D are not efficient in the control and can not conclude on the efficiency metsulfuron, flumioxazin and saflufenacil.Elephantopus mollis é uma espécie da família Asteraceae recentemente encontrada em cultivos de soja/pastagens de inverno na região centro-oeste do Rio Grande do Sul, Brasil. Sua presença tem reduzido o rendimento e aumentado o custo de produção dessas culturas. Com o objetivo de conhecer o padrão de emergência da espécie ao longo do ano e sua sensibilidade aos principais herbicidas empregados nesses cultivos é que realizou-se o presente trabalho. Para determinar o fluxo de emergência e a estimativa do banco de sementes na área foram conduzidos dois experimentos em área rural do município de Tupanciretã, e para a resposta aos herbicidas foram conduzidos cinco ensaios de curvas de dose-resposta com os herbicidas glifosato, 2,4-D, metsulfuron-metil, flumioxazin e saflufenacil. Nos experimentos para a emergência foram demarcadas duas áreas próximas. Uma mantida sem cultivo e outra submetida ao cultivo usual da área total. Em ambas, os tratamentos foram representados pelos doze meses do ano para realizar a contagem das plantas emergidas para cada mês, com quatro repetições. As amostras para estimar o banco de sementes foram coletadas no mês de agosto, em cada uma das doze parcelas da área mantida sem cultivo, nas profundidades de 0 a 5 cm e de 5 a 10 cm. Em bandejas mantidas em casa de vegetação, foram efetuadas as contagens das plantas emergidas, a cada 15 dias, durante 150 dias. Para as curvas de dose-resposta foram estabelecidas doses representando a divisão e múltiplo da dose recomendada dos herbicidas para espécies similares, na forma: 0; x/8; x/4; x/2; x; 2x; 4x; 8x. Para glifosato x = 1440 g ea ha-1, 2,4-D x = 670 g ea ha-1, metsulfuron x = 2,4 g ia ha-1, flumioxazin x = 50 g ia ha-1 e saflufenacil x = 35 g ia ha-1. Os tratamentos herbicidas foram aplicados sobre plantas com 8 a 10 folhas. As variáveis foram a avaliação visual de controle (%) (escala 0-100) aos 3, 7, 14, 21 e 28 dias após os tratamentos e a massa de matéria verde e seca das raízes e parte aérea, produzindo a massa total e relativa, por sua expressão em percentagem do tratamento sem herbicida aos 28 dias. Os resultados demonstram que E. mollis emerge durante todos meses do ano, com maiores emergências nos meses de novembro, fevereiro e maio. Já a estimativa do banco de sementes apontou para a presença, na média de todas amostras, de 400 sementes m2 de E. mollis na profundidade de 0 a 5 cm e inespressiva entre 5 a 10 cm. Houve uma fraca correlação entre as plantas emergidas e o banco de sementes, demonstrando ser a emergência mais intensa provavelmente devido à temperatura do solo dos meses de novembro, fevereiro e maio. Pode-se sugerir que os picos de emergência coincidem com os momentos de implantação das culturas e representam assim as melhores oportunidades para realizar-se o controle. Os resultados das curvas demonstram que glifosato e 2,4-D não são eficientes no controle e não se pode concluir sobre a eficiência de metsulfuron, flumioxazin e saflufenacil.Fundação de Amparo a Pesquisa no Estado do Rio Grande do Sulapplication/pdfporUniversidade Federal de Santa MariaPrograma de Pós-Graduação em AgrobiologiaUFSMBRCiências BiológicasSuçuaiáCurvas de dose-respostaAssociação soja/pastagem de invernoSuçuaiáDose-response curvesSoybean crop/winter pastures associationsCNPQ::CIENCIAS BIOLOGICASElephantopus mollis Kunth (Asteraceae): fluxo de emergência e curva de dose-resposta a herbicidasElephantopus mollis Kunth (Asteraceae): emergency flow and herbicides dose-response curvesinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisMachado, Sérgio Luiz de Oliveirahttp://lattes.cnpq.br/0360886006002113Bianchi, Mario Antoniohttp://lattes.cnpq.br/5740080659495057Essi, Lilianahttp://lattes.cnpq.br/5776430118696894http://lattes.cnpq.br/9480404753456469Balbinot, Andrisa200000000006400500300300300e60531fa-cb8f-416b-b6ca-73f0fb0c0428b11ffe15-5da2-426f-acc6-35c3cca4eb1a7f10902a-bd96-4bb0-a177-78749e402e4dbbbd06f3-c2e0-4226-8ba6-bcbaea37eccfinfo:eu-repo/semantics/openAccessreponame:Manancial - Repositório Digital da UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMORIGINALBALBINOT, ANDRISA.pdfapplication/pdf2832658http://repositorio.ufsm.br/bitstream/1/4906/1/BALBINOT%2c%20ANDRISA.pdfdc42dc81f3e786d816a5ec5b1ba19e5dMD51TEXTBALBINOT, ANDRISA.pdf.txtBALBINOT, ANDRISA.pdf.txtExtracted texttext/plain113817http://repositorio.ufsm.br/bitstream/1/4906/2/BALBINOT%2c%20ANDRISA.pdf.txtbeccd44e7ae984f74d54c4a6d3d8fc24MD52THUMBNAILBALBINOT, ANDRISA.pdf.jpgBALBINOT, ANDRISA.pdf.jpgIM Thumbnailimage/jpeg4087http://repositorio.ufsm.br/bitstream/1/4906/3/BALBINOT%2c%20ANDRISA.pdf.jpg2b986bc9a15d849a1f006c6355f303bdMD531/49062022-01-17 14:24:31.608oai:repositorio.ufsm.br:1/4906Repositório Institucionalhttp://repositorio.ufsm.br/PUBhttp://repositorio.ufsm.br/oai/requestopendoar:39132022-01-17T17:24:31Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM)false |
dc.title.por.fl_str_mv |
Elephantopus mollis Kunth (Asteraceae): fluxo de emergência e curva de dose-resposta a herbicidas |
dc.title.alternative.eng.fl_str_mv |
Elephantopus mollis Kunth (Asteraceae): emergency flow and herbicides dose-response curves |
title |
Elephantopus mollis Kunth (Asteraceae): fluxo de emergência e curva de dose-resposta a herbicidas |
spellingShingle |
Elephantopus mollis Kunth (Asteraceae): fluxo de emergência e curva de dose-resposta a herbicidas Balbinot, Andrisa Suçuaiá Curvas de dose-resposta Associação soja/pastagem de inverno Suçuaiá Dose-response curves Soybean crop/winter pastures associations CNPQ::CIENCIAS BIOLOGICAS |
title_short |
Elephantopus mollis Kunth (Asteraceae): fluxo de emergência e curva de dose-resposta a herbicidas |
title_full |
Elephantopus mollis Kunth (Asteraceae): fluxo de emergência e curva de dose-resposta a herbicidas |
title_fullStr |
Elephantopus mollis Kunth (Asteraceae): fluxo de emergência e curva de dose-resposta a herbicidas |
title_full_unstemmed |
Elephantopus mollis Kunth (Asteraceae): fluxo de emergência e curva de dose-resposta a herbicidas |
title_sort |
Elephantopus mollis Kunth (Asteraceae): fluxo de emergência e curva de dose-resposta a herbicidas |
author |
Balbinot, Andrisa |
author_facet |
Balbinot, Andrisa |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Machado, Sérgio Luiz de Oliveira |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/0360886006002113 |
dc.contributor.referee1.fl_str_mv |
Bianchi, Mario Antonio |
dc.contributor.referee1Lattes.fl_str_mv |
http://lattes.cnpq.br/5740080659495057 |
dc.contributor.referee2.fl_str_mv |
Essi, Liliana |
dc.contributor.referee2Lattes.fl_str_mv |
http://lattes.cnpq.br/5776430118696894 |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/9480404753456469 |
dc.contributor.author.fl_str_mv |
Balbinot, Andrisa |
contributor_str_mv |
Machado, Sérgio Luiz de Oliveira Bianchi, Mario Antonio Essi, Liliana |
dc.subject.por.fl_str_mv |
Suçuaiá Curvas de dose-resposta Associação soja/pastagem de inverno |
topic |
Suçuaiá Curvas de dose-resposta Associação soja/pastagem de inverno Suçuaiá Dose-response curves Soybean crop/winter pastures associations CNPQ::CIENCIAS BIOLOGICAS |
dc.subject.eng.fl_str_mv |
Suçuaiá Dose-response curves Soybean crop/winter pastures associations |
dc.subject.cnpq.fl_str_mv |
CNPQ::CIENCIAS BIOLOGICAS |
description |
Elephantopus mollis is a Asteraceae family species recently found in soybean crops / winter pastures in the central-western region of Rio Grande do Sul, Brazil. Its presence has reduced yields and increased the cost of production of these crops. In order to get the emergency pattern of the species throughout the year and its sensitivity to the main herbicide used in these crops it is that took place this work. To determine the emergency flow and the seed bank in the area two experiments were conducted in a rural area of the municipality of Tupanciretã, and for the response to herbicides were conducted five trials of dose-response curves to the herbicide glyphosate, 2, 4-D, metsulfuron-methyl, flumioxazin and saflufenacil. In the emergency experiments it have been demarcated two areas side by side. One kept uncroped and another subjected to the usual crop of the total area. In both areas, treatments were represented by twelve months of the year to carry out the count of emerged plants for each month. The samples to estimate the seed bank were collected in the month of August in each of the twelve portions of the area kept uncroped in the depths of 0 to 5 cm and 5 to 10 cm. In trays kept in a greenhouse (UFSM), counts were made of emerged plants, every 15 days for 150 days. For dose-response curves were established doses and represents the division multiple of the recommended dose of herbicide for similar species as 0; x / 8; x / 4; x / 2; x; 2x; 4x; 8x. For glyphosate x = 1440 g ha-1, 2,4-D x = 670 g ha-1, metsulfuron x = 2.4 g ai ha-1, flumioxazin x = 50 g ai ha-1 and saflufenacil x = 35 g ai ha-1. Herbicide treatments were applied to plants with 8 to 10 leaves. The variables were visual assessment of control (%) (range 0-100) at 3, 7, 14, 21 and 28 days after treatments and the mass of green and dry matter of roots and shoots, producing the total mass and relative, by its expression as a percentage of treatment without herbicide to 28 days. The results show that E. mollis emerges during all months of the year, with major emergencies in the months of November, February and May. But the seed bank pointed to the presence in the average of all samples of 400 seeds m2 of E. mollis in the 0 to 5 cm and inexpressive 5 to 10 cm. There was a weak correlation between the emerged plants and seed bank, proving to be the most intense emergency probably due to soil temperature for the months of November, February and May. It can be suggested that emergency peaks coincide with the time of implantation of cultures and thus represent the best opportunities to make up the control. The results found with the curves show that glyphosate and 2,4-D are not efficient in the control and can not conclude on the efficiency metsulfuron, flumioxazin and saflufenacil. |
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2016 |
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2016-08-04 |
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2016-08-04 |
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2016-03-10 |
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masterThesis |
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BALBINOT, Andrisa. Elephantopus mollis Kunth (Asteraceae): emergency flow and herbicides dose-response curves. 2016. 71 f. Dissertação (Mestrado em Ciências Biológicas) - Universidade Federal de Santa Maria, Santa Maria, 2016. |
dc.identifier.uri.fl_str_mv |
http://repositorio.ufsm.br/handle/1/4906 |
identifier_str_mv |
BALBINOT, Andrisa. Elephantopus mollis Kunth (Asteraceae): emergency flow and herbicides dose-response curves. 2016. 71 f. Dissertação (Mestrado em Ciências Biológicas) - Universidade Federal de Santa Maria, Santa Maria, 2016. |
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http://repositorio.ufsm.br/handle/1/4906 |
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Universidade Federal de Santa Maria |
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Programa de Pós-Graduação em Agrobiologia |
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UFSM |
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Ciências Biológicas |
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Universidade Federal de Santa Maria |
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