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| Mariani,Franciele; Vargas,Leandro; Agostinetto,Dirceu; Nohatto,Marcos André; Langaro,Ana Claudia; Duarte,Thiago Vieira. |
| Resumo: O objetivo deste trabalho foi identificar e comparar valores adaptativos dos biótipos de azevém (Lolium multiflorum) resistente e suscetível ao herbicida iodosulfuron e avaliar sua habilidade competitiva com o trigo (Triticum aestivum). Para avaliar o valor adaptativo, os biótipos foram semeados em vasos e coletados a cada 10 dias após a emergência, até os 80 dias. Em cada coleta, avaliaram-se estatura, área foliar e massa seca da parte aérea, e, a partir destas avaliações, foram calculadas variáveis indiretas para comparar o crescimento entre os biótipos. A habilidade competitiva foi determinada em experimento de série de substituição, tendo-se variado a proporção da cultura e do competidor. As proporções testadas foram: 100:0 (estande puro do... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lolium multiflorum; Triticum aestivum; Competição interespecífica; Herbicida; Planta daninha.. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2016000600710 |
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| Agostinetto,Dirceu; Ulguim,André da Rosa; Vargas,Leandro; Silva,Jessica Dias Gomes da; Langaro,Ana Claudia. |
| Abstract: The objective of this work was to compare wild poinsettia (Euphorbia heterophylla) biotypes as to their morphological characteristics, as well as to determine their genetic similarity in the state of Rio Grande do Sul, Brazil, and to confront the light compensation point of susceptible biotypes and of biotypes with low-resistance level to glyphosate. Besides the morphology analysis, the study included the genetic characterization, by AFLP, of susceptible (GR50= 58.65 g ha-1 a.e.) biotypes and of biotypes with low resistance (GR50= 310.36 g ha-1 a.e.) to glyphosate. The competitive ability of the biotypes was inferred according to their light compensation point. The observed morphological characteristics do not allow to differentiate biotypes as... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Euphorbia heterophylla; AFLP; Competitive ability; EPSPs inhibitor herbicide; Light compensation point; Resistance to herbicide. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017001100987 |
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| 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 |
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| Bastiani,Marlon Ouriques; Lamego,Fabiane Pinto; Agostinetto,Dirceu; Langaro,Ana Claudia; Silva,Diônvera Coelho da. |
| ABSTRACT The aim of this work was to evaluate the competitiveness between soybean cultivars and barnyardgrass, based on morphological and physiological characteristics of species. The experiments were conducted in completely randomized experimental design, with 4 replications. In the first study, for both soybean and barnyardgrass, it was determined the population of plants in which shoot dry matter became constant and independent of the population (16 plants∙pot−1 or 400 plants∙m−2). In the second study, 2 experiments were conducted to evaluate the competitiveness of BMX Apolo RR and BMX Potência RR soybean cultivars with barnyardgrass plants, both carried out in replacement series under different proportions of plants∙pot−1 (100:0; 75:25; 50:50; 25:75... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Echinochloa crus-galli; Lowlands; Replacement series; Competition. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052016000400435 |
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| Carvalho,Gledson Soares de; Leal,Jessica Ferreira Lourenço; Souza,Amanda dos Santos; Oliveira Junior,Francisco Freire de; Langaro,Ana Claudia; Pinho,Camila Ferreira de. |
| ABSTRACT Herbicide interactions can be synergic, additive, or antagonist when mixed in the spray tank. A good example is an association between 2,4-D and graminicides. One hypothesis is that 2,4-D contributes to increasing the Cytochrome P450 activity, which may be one of the causes of antagonism. This study aimed to investigate the use of CYP450 enzymes inhibitor associated with the herbicide mixtures 2,4-D and ACCase inhibitors in vivo on the control of Digitaria insularis. The experiment was performed using a randomized block design in a factorial scheme of 6x2 with four replications. Factor A consisted of untreated check, 2,4-D (1005 g a.e ha-1), clethodim (192 g a.i ha-1) and haloxyfop (62.4 g a.i ha-1), 2,4-D + clethodim (1005 g a.e ha-1+192 g a.i... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sourgrass interaction metabolization malathion 2; 4-D graminicides CYP450. |
| Ano: 2021 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542021000100202 |
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