Manejo integrado de capim-annoni (Eragrostis plana Nees): associando ferramentas do controle químico e fisiologia da planta
| Autor: | Eduardo Avelino Faleiro, Diego Martins Chiapinotto, Eduardo Bohrer de Azevedo, Fabiane Pinto Lamego, Carlos Eduardo Schaedler |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
weed control glifosato Agriculture (General) 01 natural sciences S1-972 chemistry.chemical_compound glyphosate Eragrostis plana pastagem lâmina d´água flooded Completely randomized design Mathematics General Veterinary Plant physiology Agriculture 04 agricultural and veterinary sciences sombreamento pasture Horticulture chemistry controle de planta daninha Glyphosate Cyhalofop-butyl 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Animal Science and Zoology Weed Chemical control Agronomy and Crop Science shading 010606 plant biology & botany |
| Zdroj: | Ciência Rural, Vol 51, Iss 2 (2020) Ciência Rural v.51 n.2 2021 Ciência Rural Universidade Federal de Santa Maria (UFSM) instacron:UFSM Ciência Rural, Volume: 51, Issue: 2, Article number: e20200271, Published: 11 DEC 2020 |
| ISSN: | 1678-4596 |
| Popis: | The objective of the study was to evaluate the efficiency of herbicides use in the control of tough lovegrass according to the availability of solar radiation and the presence or absence of flooded. Two experiments were conducted in a completely randomized design, in a 2x2x4 and 2x2x5 factorial scheme, where factor A was equivalent to the environment (natural or reduced radiation); factor B to water condition (with a 2 cm flooded or without); and, factor C the herbicides: cyhalofop butyl (315 g ha-1), glyphosate (1080 g ha-1), cyhalofop butyl + glyphosate (315 g ha-1 + 1080 g ha-1) and control (without application) in the first experiment. In the second experiment, the herbicides used were cyhalofop butyl (315 g ha-1), glyphosate (1080 g ha-1), sethoxydim (184g ha-1), imazethapyr (106 g ha-1) and control (without application). Glyphosate efficiently controls plants of tough lovegrass with four tillers (>90%), being superior to cyhalofop, imazethapyr and sethoxydim; independently, of resource conditions. Reduction in the availability of solar radiation generates less shoot dry mass production from the weed, and improves the control only by imazethapyr and cyhalofop. In general, a flooded condition does not affect tough lovegrass control by herbicides.Key words: flooded, glyphosate, pasture, shading, weed control. Manejo integrado de capim-annoni (Eragrostis plana Nees): associando ferramentas do controle quimico e fisiologia da planta RESUMO:O objetivo do trabalho foi avaliar a eficiencia de uso de herbicidas no controle de capim-annoni em funcao da disponibilidade de radiacao solar e da presenca ou ausencia de lâmina de agua. Para isso, foram conduzidos dois experimentos em delineamento inteiramente casualizado, em esquema fatorial 2x2x4 e 2x2x5, em que o fator A equivaleu ao ambiente (radiacao natural ou reduzida); fator B a condicao hidrica (com lâmina d?agua de 2 cm ou sem); e, o fator C aos herbicidas: cyhalofop butyl (315 g ha-1), glyphosate (1080 g ha-1), cyhalofop butyl + glyphosate (315 g ha-1 + 1080 g ha-1) e testemunha (sem aplicacao) no primeiro experimento. No segundo experimento, os herbicidas utilizados foram: cyhalofop butyl (315 g ha-1), glyphosate (1080 g ha-1), sethoxydim (184 g ha-1), imazethapyr (106 g ha-1) e testemunha (sem aplicacao). Glyphosate controla eficientemente plantas de capim-annoni com quatro afilhos (>90%), sendo superior a cyhalofop butyl, imazethapyr e sethoxydim, independente das condicoes. A reducao da disponibilidade de radiacao solar gera menor producao de materia seca da parte aerea pelo capim-annoni, podendo inclusive, contribuir para maior eficiencia de controle somente por imazethapyr e cyhalofop. De maneira geral, a condicao de lâmina d?agua nao afeta o controle de capim-annoni pelos herbicidas.Palavras-chave: lâmina d agua, glifosato, pastagem, sombreamento, controle de plan |
| Databáze: | OpenAIRE |
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