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	Provedor de dados Rev. Ciênc. Agron. (1) Bragantia (1) Autor Agostinetto,Dirceu (2) Perboni,Lais Tessari (2) Garcia,Jessica Rodrigues (1) Langaro,Ana Claudia (1) Ruchel,Queli (1) Silva,Bruno Moncks da (1) Ulguim,André da Rosa (1) Westendorff,Nixon da Rosa (1) Mais... Palavra-chave Antioxidant system (1) Chemical control (1) Cyperus esculentus (1) Oryza sativa (1) Reactive oxygen species (1) Rectangular hyperbole (1) Selectivity (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2017 (1) 2014 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Yield loss and economic thresholds of yellow nutsedge in irrigated rice as a function of the onset of flood irrigation Bragantia Westendorff,Nixon da Rosa; Agostinetto,Dirceu; Ulguim,André da Rosa; Perboni,Lais Tessari; Silva,Bruno Moncks da. Yellow nutsedge (Cyperus esculentus) is adapted to flooding and reduces yield in irrigated rice. Information on the competitive ability of this weed with the crop and the size of the economic damage caused is lacking. Mathematical models quantify the damage to crops and support control decision-making. This study aimed to determine yield losses and economic thresholds (ET) of this weed in the culture according to weed population and time of onset of irrigation of the crop. The field study was conducted in the agricultural year of 2010/2011 in Pelotas/RS to evaluate the competitive ability of BRS Querência in competition with different population levels of yellow nutsedge and two periods of onset of flood irrigation (14 and 21 days after emergence). The... Tipo: Info:eu-repo/semantics/article Palavras-chave: Cyperus esculentus; Oryza sativa; Rectangular hyperbole. Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052014000100005 Oxidative stress caused by the use of preemergent herbicides in rice crops Rev. Ciênc. Agron. Langaro,Ana Claudia; Agostinetto,Dirceu; Ruchel,Queli; Garcia,Jessica Rodrigues; Perboni,Lais Tessari. ABSTRACT Among the methods of weed control, stands out chemical control. However, even selective, herbicides can trigger the production of reactive species of oxygen and cause oxidative stress. The aim of the study was to evaluate changes in photosynthetic parameters, oxidative damage, antioxidant enzyme activity and altered metabolism of rice plants after applying pre-emergent herbicides. The experiment was conducted in a greenhouse and herbicides used were oxadiazon, pendimethalin and oxyfluorfen, beyond the control without herbicide. There was a reduction of photosynthetic rate and efficiency of carboxylation, compared to the control, when applied herbicides oxyfluorfen and pendimethalin. The major lipid peroxidation and proline accumulation was... Tipo: Info:eu-repo/semantics/article Palavras-chave: Antioxidant system; Chemical control; Reactive oxygen species; Selectivity. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902017000200358 Registros recuperados: 2 Primeira ... 1 ... Última

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