Variações em índices de área foliar e nos componentes do rendimento de grãos associadas com o uso de fungicidas em soja
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| Autor principal: | |
|---|---|
| Data de publicació: | 2020 |
| Format: | Master thesis |
| Idioma: | por |
| Font: | Repositório Institucional da UPF |
| Download full: | https://repositorio.upf.br/handle/123456789/9298 |
Sumari: | The soybean yield is influenced by the duration of the leaf area, so that the control of leaf diseases depends on the fungicide application phenological stage. The objective of this work was to evaluate the effect of chemical control with triazole and strobirulins, on the leaf area and yield components of cultivars from different maturity groups: semi-early (BRS 137), medium (BRS 154) and late (CD 205). The experiments were conducted in the field, in Passo Fundo, Rio Grande do Sul, Brazil, in the 2004-05. The treatment design was a bifactorial 5 (fungicide application stage) x 4 (fungicide) + 3 (without fungicide; two chemical treatment standards: SA and SB), arranged in randomized blocks with four replications. The following fungicides were applied, in a single dose, at stages R1, R2, R3, R4 or R5.1: a) tetraconazole (Domark®), b) epoxiconazole + piraclostrobin (Opera®), c) cyproconazole + azoxystrobin (Priori Xtra®) and d) cyproconazole + trifloxystrobin (Sphere®). The doses were according to the manufacturer's recommendation and in a volume of 150 L/ha. The standards constituted three applications, in stages R1, R3 and R5.1: SA) tetraconazole (triazole); SB) triazole + strobirulin: epoxiconazole + pyraclostrobin (R1), cyproconazole + azoxystrobin (R3) and cyproconazole + trifloxystrobin (R3). Assessments of disease severity, index (LAI) and duration (LAD) of leaf area and yield components were carried out. The cycle length of cultivars was 125 (BRS 137), 132 (BRS 154) and 145 days (CD 205). There was severe drought in the summer, which prevented the occurrence of leaf diseases at the end of the cycle; there was an incidence of powdery mildew (Microsphaera diffusa), with a maximum severity of 24%, but chemical control was greater than 80%. Standard treatments and mixtures of triazole + strobirulin did not differ (p> 0.05) in terms of response variables, but the fungicide application stage had a significant effect on LAD and yield components: a) single applications of triazole + strobirulin in stages R2 or R3 increased LAD and the thousand grain mass (TGM), in relation to those performed in R1, R4 or R5.1, but were similar to standard treatment; b) single application of triazole + strobirulin had a similar effect to standard treatment in the number of pods/plant, except if applied at the R1 stage, when this variable was reduced; c) single application of triazole + strobirulin had a similar effect to the standard treatment on the number of grains/pod, except if applied at the R5.1 stage, when it had a negative effect. The application of fungicides in R2 increased the LAI and LAD, which was reflected in the increase in TGM and grain yield. Grain yield was positively associated with TGM, but it was not related to the number of pods/plant and the number of grains/pod. In conclusion, the application of the fungicides at the R2 stage (full bloom) promotes a longer duration of the leaf area and, thus, increases the individual grain mass and the soybean productivity. The study shows that as the crop cycle decreases, the dependence on the duration of the leaf area increases, which makes preventive control of leaf diseases at the end of the cycle extremely relevant |
| _version_ | 1871607645514760192 |
|---|---|
| author | Bortolin, Janaíne Lacourt de Souza |
| author_browse | Bortolin, Janaíne Lacourt de Souza |
| author_facet | Bortolin, Janaíne Lacourt de Souza |
| author_role | author |
| collection | Repositório Institucional da UPF |
| dc.contributor.author.fl_str_mv | Bortolin, Janaíne Lacourt de Souza |
| dc.contributor.none.fl_str_mv | Forcelini, Carlos Alberto http://lattes.cnpq.br/0881524391511473 |
| dc.date.none.fl_str_mv | 2020-05-29 2025-06-20T16:42:05Z |
| dc.format.none.fl_str_mv | application/pdf application/pdf |
| dc.identifier.uri.fl_str_mv | BORTOLIN, Janaíne Lacourt de Souza. Variações em índices de área foliar e nos componentes do rendimento de grãos associadas com o uso de fungicidas em soja. 2020. 69 f. Dissertação (Mestrado em Agronomia) - Universidade de Passo Fundo, Passo Fundo, RS, 2020. https://repositorio.upf.br/handle/123456789/9298 |
| dc.language.iso.fl_str_mv | por |
| dc.publisher.none.fl_str_mv | Universidade de Passo Fundo Faculdade de Agronomia e Medicina Veterinária – FAMV Brasil UPF Programa de Pós-Graduação em Agronomia |
| dc.rights.driver.fl_str_mv | info:eu-repo/semantics/openAccess |
| dc.source.none.fl_str_mv | reponame:Repositório Institucional da UPF instname:Universidade de Passo Fundo (UPF) instacron:UPF |
| dc.subject.por.fl_str_mv | Soja - Plantio Análise foliar Fitopatologia Plantas - Efeito dos fungicidas FITOSSANIDADE::FITOPATOLOGIA |
| dc.title.none.fl_str_mv | Variações em índices de área foliar e nos componentes do rendimento de grãos associadas com o uso de fungicidas em soja Variations in leaf area indices and grain yield components associated with the use of soy fungicides |
| dc.type.driver.fl_str_mv | info:eu-repo/semantics/masterThesis |
| dc.type.status.fl_str_mv | info:eu-repo/semantics/publishedVersion |
| description | The soybean yield is influenced by the duration of the leaf area, so that the control of leaf diseases depends on the fungicide application phenological stage. The objective of this work was to evaluate the effect of chemical control with triazole and strobirulins, on the leaf area and yield components of cultivars from different maturity groups: semi-early (BRS 137), medium (BRS 154) and late (CD 205). The experiments were conducted in the field, in Passo Fundo, Rio Grande do Sul, Brazil, in the 2004-05. The treatment design was a bifactorial 5 (fungicide application stage) x 4 (fungicide) + 3 (without fungicide; two chemical treatment standards: SA and SB), arranged in randomized blocks with four replications. The following fungicides were applied, in a single dose, at stages R1, R2, R3, R4 or R5.1: a) tetraconazole (Domark®), b) epoxiconazole + piraclostrobin (Opera®), c) cyproconazole + azoxystrobin (Priori Xtra®) and d) cyproconazole + trifloxystrobin (Sphere®). The doses were according to the manufacturer's recommendation and in a volume of 150 L/ha. The standards constituted three applications, in stages R1, R3 and R5.1: SA) tetraconazole (triazole); SB) triazole + strobirulin: epoxiconazole + pyraclostrobin (R1), cyproconazole + azoxystrobin (R3) and cyproconazole + trifloxystrobin (R3). Assessments of disease severity, index (LAI) and duration (LAD) of leaf area and yield components were carried out. The cycle length of cultivars was 125 (BRS 137), 132 (BRS 154) and 145 days (CD 205). There was severe drought in the summer, which prevented the occurrence of leaf diseases at the end of the cycle; there was an incidence of powdery mildew (Microsphaera diffusa), with a maximum severity of 24%, but chemical control was greater than 80%. Standard treatments and mixtures of triazole + strobirulin did not differ (p> 0.05) in terms of response variables, but the fungicide application stage had a significant effect on LAD and yield components: a) single applications of triazole + strobirulin in stages R2 or R3 increased LAD and the thousand grain mass (TGM), in relation to those performed in R1, R4 or R5.1, but were similar to standard treatment; b) single application of triazole + strobirulin had a similar effect to standard treatment in the number of pods/plant, except if applied at the R1 stage, when this variable was reduced; c) single application of triazole + strobirulin had a similar effect to the standard treatment on the number of grains/pod, except if applied at the R5.1 stage, when it had a negative effect. The application of fungicides in R2 increased the LAI and LAD, which was reflected in the increase in TGM and grain yield. Grain yield was positively associated with TGM, but it was not related to the number of pods/plant and the number of grains/pod. In conclusion, the application of the fungicides at the R2 stage (full bloom) promotes a longer duration of the leaf area and, thus, increases the individual grain mass and the soybean productivity. The study shows that as the crop cycle decreases, the dependence on the duration of the leaf area increases, which makes preventive control of leaf diseases at the end of the cycle extremely relevant |
| eu_rights_str_mv | openAccess |
| format | masterThesis |
| id | UPF_d68bafd2b17ee387bdd3d5e76782bd64 |
| identifier_str_mv | BORTOLIN, Janaíne Lacourt de Souza. Variações em índices de área foliar e nos componentes do rendimento de grãos associadas com o uso de fungicidas em soja. 2020. 69 f. Dissertação (Mestrado em Agronomia) - Universidade de Passo Fundo, Passo Fundo, RS, 2020. |
| instacron_str | UPF |
| institution | UPF |
| instname_str | Universidade de Passo Fundo (UPF) |
| language | por |
| network_acronym_str | UPF |
| network_name_str | Repositório Institucional da UPF |
| oai_identifier_str | oai:repositorio.upf.br:123456789/9298 |
| publishDate | 2020 |
| publishDateSort | 2020 |
| publisher.none.fl_str_mv | Universidade de Passo Fundo Faculdade de Agronomia e Medicina Veterinária – FAMV Brasil UPF Programa de Pós-Graduação em Agronomia |
| reponame_str | Repositório Institucional da UPF |
| repository.mail.fl_str_mv | jucelei@upf.br||biblio@upf.br |
| repository.name.fl_str_mv | Repositório Institucional da UPF - Universidade de Passo Fundo (UPF) |
| repository_id_str | 1610 |
| spelling | Variações em índices de área foliar e nos componentes do rendimento de grãos associadas com o uso de fungicidas em sojaVariations in leaf area indices and grain yield components associated with the use of soy fungicidesSoja - PlantioAnálise foliarFitopatologiaPlantas - Efeito dos fungicidasFITOSSANIDADE::FITOPATOLOGIAThe soybean yield is influenced by the duration of the leaf area, so that the control of leaf diseases depends on the fungicide application phenological stage. The objective of this work was to evaluate the effect of chemical control with triazole and strobirulins, on the leaf area and yield components of cultivars from different maturity groups: semi-early (BRS 137), medium (BRS 154) and late (CD 205). The experiments were conducted in the field, in Passo Fundo, Rio Grande do Sul, Brazil, in the 2004-05. The treatment design was a bifactorial 5 (fungicide application stage) x 4 (fungicide) + 3 (without fungicide; two chemical treatment standards: SA and SB), arranged in randomized blocks with four replications. The following fungicides were applied, in a single dose, at stages R1, R2, R3, R4 or R5.1: a) tetraconazole (Domark®), b) epoxiconazole + piraclostrobin (Opera®), c) cyproconazole + azoxystrobin (Priori Xtra®) and d) cyproconazole + trifloxystrobin (Sphere®). The doses were according to the manufacturer's recommendation and in a volume of 150 L/ha. The standards constituted three applications, in stages R1, R3 and R5.1: SA) tetraconazole (triazole); SB) triazole + strobirulin: epoxiconazole + pyraclostrobin (R1), cyproconazole + azoxystrobin (R3) and cyproconazole + trifloxystrobin (R3). Assessments of disease severity, index (LAI) and duration (LAD) of leaf area and yield components were carried out. The cycle length of cultivars was 125 (BRS 137), 132 (BRS 154) and 145 days (CD 205). There was severe drought in the summer, which prevented the occurrence of leaf diseases at the end of the cycle; there was an incidence of powdery mildew (Microsphaera diffusa), with a maximum severity of 24%, but chemical control was greater than 80%. Standard treatments and mixtures of triazole + strobirulin did not differ (p> 0.05) in terms of response variables, but the fungicide application stage had a significant effect on LAD and yield components: a) single applications of triazole + strobirulin in stages R2 or R3 increased LAD and the thousand grain mass (TGM), in relation to those performed in R1, R4 or R5.1, but were similar to standard treatment; b) single application of triazole + strobirulin had a similar effect to standard treatment in the number of pods/plant, except if applied at the R1 stage, when this variable was reduced; c) single application of triazole + strobirulin had a similar effect to the standard treatment on the number of grains/pod, except if applied at the R5.1 stage, when it had a negative effect. The application of fungicides in R2 increased the LAI and LAD, which was reflected in the increase in TGM and grain yield. Grain yield was positively associated with TGM, but it was not related to the number of pods/plant and the number of grains/pod. In conclusion, the application of the fungicides at the R2 stage (full bloom) promotes a longer duration of the leaf area and, thus, increases the individual grain mass and the soybean productivity. The study shows that as the crop cycle decreases, the dependence on the duration of the leaf area increases, which makes preventive control of leaf diseases at the end of the cycle extremely relevantO rendimento da soja é influenciado pela duração de área foliar, de modo que o controle das doenças foliares depende do estádio fenológico de aplicação dos fungicidas. Objetivou-se neste trabalho avaliar o efeito do controle químico, com triazol e estrobirulinas, na área foliar e nos componentes do rendimento de cultivares de soja de distintos grupos de maturidade: semi-precoce (BRS 137), médio (BRS 154) e tardio (CD 205). Os experimentos foram conduzidos no campo, em Passo Fundo, Rio Grande do Sul, Brasil, na safra 2004-05. Os tratamentos foram organizados em bifatorial 5 (estádio de aplicação) x 4 (fungicida) + 3 (sem fungicida; dois padrões de tratamento químico: PA e PB), e dispostos em delineamento de blocos casualizados, com quatro repetições. Os seguintes fungicidas foram aplicados, em dose única, nos estádios R1, R2, R3, R4 ou R5.1: a) tetraconazole (Domark®), b) epoxiconazole + piraclostrobin (Opera®), c) ciproconazole + azoxistrobim (Priori Xtra) e d) ciproconazole + trifloxistrobin (Sphere®). As doses foram conforme recomendação do fabricante e em volume de calda de 150 L/ha. Os padrões constituiram tres aplicações, nos estádios R1, R3 e R5.1: PA) tetraconazole (triazol); PB) triazol + estrobirulina: epoxiconazole + piraclostrobin (R1), ciproconazole + azoxistrobim (R3) e ciproconazole + trifloxistrobin (R3). Foram feitas avaliações de severidade de doenças, índice (IAF) e duração (DAF) de área foliar e componentes do rendimento. A duração do ciclo das cultivares foi de 125 (BRS 137), 132 (BRS 154) e 145 dias (CD 205). A severa estiagem ocorrida no verão restringiu a ocorrência de doenças foliares de final de ciclo, mas houve incidência de oídio (Microsphaera difusa), com severidade máxima de 24% e que foi controlada pelos tratamentos químicos (>80%). Os tratamentos padrões e as misturas de triazol + estrobirulina não diferiram (p>0,05) quanto às variáveis-resposta, mas o estádio de aplicação dos fungicidas teve efeito significativo na DAF e nos componentes do rendimento: a) aplicação única de misturas de triazol + estrobirulina nos estádios R2 ou R3 aumentaram a DAF e a massa de mil grãos (MMG), em relação àquelas realizadas em R1, R4 ou R5.1, e foram similares aos padrões; b) aplicação única de misturas de triazol + estrobirulina teve efeito similar aos padrões no número de vagens/planta, exceto se aplicada no estádio R1, quando reduziu essa variável; c) aplicação única de misturas de triazol + estrobirulina teve efeito similar aos padrões no número de grãos/vagem, exceto se aplicada no estádio R5.1, quando teve efeito negativo. A aplicação de fungicidas em R2 aumentou o IAF e a DAF, o que se refletiu no incremento da MMG e no rendimento de grãos. O rendimento de grãos foi associado positivamente à MMG, mas não teve relação com nº de vagens/planta e nº de grãos/vagem. Em conclusão, a aplicação de fungicidas no estádio R2 (floração plena) promeve maior duração de área foliar e, com isso, eleva a massa individual de grãos e a produtividade da soja. O estudo mostra que à medida que o ciclo da cultura diminui, a dependência em relação à duração de área foliar aumenta, o que torna sobremaneira relevante o controle preventivo das doenças foliares de final de ciclo.Universidade de Passo FundoFaculdade de Agronomia e Medicina Veterinária – FAMVBrasilUPFPrograma de Pós-Graduação em AgronomiaForcelini, Carlos Albertohttp://lattes.cnpq.br/0881524391511473Bortolin, Janaíne Lacourt de Souza2025-06-20T16:42:05Z2020-05-29info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfapplication/pdfBORTOLIN, Janaíne Lacourt de Souza. Variações em índices de área foliar e nos componentes do rendimento de grãos associadas com o uso de fungicidas em soja. 2020. 69 f. Dissertação (Mestrado em Agronomia) - Universidade de Passo Fundo, Passo Fundo, RS, 2020.https://repositorio.upf.br/handle/123456789/9298porinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UPFinstname:Universidade de Passo Fundo (UPF)instacron:UPF2025-12-30T20:25:18Zoai:repositorio.upf.br:123456789/9298Repositório InstitucionalPRIhttp://repositorio.upf.br/oai/requestjucelei@upf.br||biblio@upf.bropendoar:16102025-12-30T20:25:18Repositório Institucional da UPF - Universidade de Passo Fundo (UPF) |
| spellingShingle | Variações em índices de área foliar e nos componentes do rendimento de grãos associadas com o uso de fungicidas em soja Bortolin, Janaíne Lacourt de Souza Soja - Plantio Análise foliar Fitopatologia Plantas - Efeito dos fungicidas FITOSSANIDADE::FITOPATOLOGIA |
| status_str | publishedVersion |
| title | Variações em índices de área foliar e nos componentes do rendimento de grãos associadas com o uso de fungicidas em soja |
| title_full | Variações em índices de área foliar e nos componentes do rendimento de grãos associadas com o uso de fungicidas em soja |
| title_fullStr | Variações em índices de área foliar e nos componentes do rendimento de grãos associadas com o uso de fungicidas em soja |
| title_full_unstemmed | Variações em índices de área foliar e nos componentes do rendimento de grãos associadas com o uso de fungicidas em soja |
| title_short | Variações em índices de área foliar e nos componentes do rendimento de grãos associadas com o uso de fungicidas em soja |
| title_sort | Variações em índices de área foliar e nos componentes do rendimento de grãos associadas com o uso de fungicidas em soja |
| topic | Soja - Plantio Análise foliar Fitopatologia Plantas - Efeito dos fungicidas FITOSSANIDADE::FITOPATOLOGIA |
| url | https://repositorio.upf.br/handle/123456789/9298 |