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Control of Italian ryegrass and Alexandergrass in corn using different corn sowing date, pre- and post-emergent herbicides. Repositório Alice
PIASECKI, C.; OVEJERO, R. F. L.; PICOLI JUNIOR, G. J.; BELLINI, L. F.; AGOSTINETTO, D.; VARGAS, L..
Glyphosate-resistant (GR) Italian ryegrass (LOLMU) and Alexandergrass (URPLA) are troublesome weeds in corn cropping systems in Southern Brazil. The emergence pattern of those weeds is not uniform and may change according to the season?s environmental characteristics. Also, herbicide resistance has been diminishing the success of the weed control programs. The objectives of this study were to evaluate the influence of corn-sowing date on LOLMU and URPLA densities and their control provided by pre- and post-emergent herbicides. Field trials were conducted in two crop seasons in Southern Brazil consisting of three corn sowing date (August, September, and October) and the application of atrazine + S-metolachlor (residual) in corn pre-emergence in different...
Tipo: Artigo de periódico Palavras-chave: Residual; Herbicide resistance management; S-metolachlor; Atrazine; Integrated weed management.
Ano: 2020 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1129874
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Glyphosate and saflufenacil: elucidating their combined action on the control of glyphosate-resistant conyza bonariensis. Repositório Alice
PIASECKI, C.; CARVALHO, I. R.; AVILA, L. A.; AGOSTINETTO, D.; VARGAS, L..
Synergic efects of glyphosate and saflufenacil have been reported to control Conyza spp. However, the mechanism of this synergic combination is unknown. The objectives of this study were to investigate the efects of the combination of glyphosate and saflufenacil on the control and resistance status of glyphosate-resistant (GR) C. bonariensis, as well as on oxidative stress and lipidic peroxidation. Glyphosate-resistant and glyphosate-sensitive (GS) biotypes were treated with diferent rates of saflufenacil, glyphosate, and glyphosate combined with saflufenacil. The combination of glyphosate (1480 g ae haf1) and saflufenacil (f15 g haf1) presented the best control of GR plants compared with their individual efects. It also reduced the resistance factor from...
Tipo: Artigo de periódico Palavras-chave: Reactive oxygen species (ROS); SHikimic-acid; Lipidic peroxidation; Herbicide resistance management; Herbicide synergism; Mixture of herbicides; Oxidative stress.
Ano: 2020 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1129872
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Residual herbicides in weed management for glyphosate-resistant soybean in Brazil Planta Daninha
Lopes Ovejero,R.F.; Soares,D.J.; Oliveira,W.S.; Fonseca,L.B.; Berger,G.U.; Soteres,J.K.; Christoffoleti,P.J..
In agricultural production systems where the glyphosate-resistant soybean crop (Glycine max) is grown and the practice of crop rotation with alternative herbicides is not adopted, the exclusive and continuous use of glyphosate has led to the occurrence of resistant weed populations that may limit or compromise the benefits of this technology. Thus, the efficacy of weed management programs, including the use of residual herbicides (sulfentrazone, flumioxazin, imazethapyr, diclosulan, chlorimuron and s-metolachlor) applied in preemergence and followed by in-crop postemergence applications of glyphosate (PRE-POST) were compared to glyphosate postemergence only programs - POST. The study was conducted across nine locations during the 2009/2010 and 2010/2011...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Herbicide resistance management; Mode of action; Residual herbicides; Weed management programs; Preemergence; Postemergence.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582013000400021
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