|
|
|
|
| |
|
|
| MARIANI,F.; SENSEMAM,S.A.; VARGAS,L.; AGOSTINETO,D.; ÁVILA,L.A.; SANTOS,F.M.. |
| ABSTRACT: Ryegrass(Lolium multiflorum)is one of the most worrisome species with regard to herbicide resistance. This study aimed at characterizing the acetolactate synthase (ALS) enzyme activity of resistant biotypes (NC and AR) and susceptible biotypes to iodosulfuron-methyl-sodium (iodosulfuron). Different concentrations of pyruvate (1, 10, 20, 40, 60, 80 and 100 mM), of iodosulfuron (0 to 100 µM for the resistant biotypes and 0 to 0.5 µM for the susceptible biotype) and concentrations of valine, leucine and isoleucine (0, 0.001, 0.01, 0.1, 1, 10 and 100 mM) were used for the in vitro characterization. According to the results, the Michaelis constant (Km) values (pyruvate) for the assessed biotypes were similar. With iodosulfuron, resistant biotypes... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Acetolactate synthase (ALS); Lolium multiflorum; Amino acids; Sulfonylurea. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100201 |
| |
|
|
| Vázquez,MB; Bianchinotti,MV. |
| Strains of Mucor, Penicillium and Trichoderma, able to use metsulfuron-methyl (MM) as a sole carbon and energy source, were isolated from agricultural soils in Argentina. This is the first time this ability is recorded in the Mucor or Trichoderma species. When the isolated strains were compared in relation to their capacity to use the herbicide, those of Trichoderma showed the best results. Because of this, they were selected for further assays. The effect of metsulfuron on growth in liquid media was tested. Also, the ability of conidia to germinate in water agar medium containing the target herbicide was evaluated. All the strains could grow from spores using only metsulfuron-methyl as a carbon and energy source. These strains of Trichoderma are promising... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Degradation; Herbicides; Soils; Sulfonylurea; Trichoderma. |
| Ano: 2013 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572013000100016 |
| |
|
|
| López-Ovejero,Ramiro Fernando; Carvalho,Saul Jorge Pinto de; Nicolai,Marcelo; Abreu,Aluana Gonçalves; Grombone-Guaratini,Maria Tereza; Toledo,Roberto Estevão Bragion; Christoffoleti,Pedro Jacob. |
| The frequent application of herbicides in agricultural areas may select resistant biotypes in weed populations, whose biological characteristics influence the speed and patterns of resistance. This research aims to charactere, simultaneously, resistance patterns and differential susceptibility of Bidens pilosa and B. subalternans biotypes to ALS-inhibiting herbicides of the imidazolinone and sulfonylurea chemical groups. Six hairy beggarticks biotypes, four suspected resistant and two known susceptible, were treated with eight rates of chlorimuron-ethyl or imazethapyr, in greenhouse conditions. Percent control and percent fresh weight of the plants were evaluated at 28 days after the application. B. subalternans is less susceptible to ALS-inhibiting... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Imidazolinone; Sulfonylurea; Hairy beggarticks; Soybean. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162006000200005 |
| |
|
|
| Gelmini,Gerson Augusto; Victória Filho,Ricardo; Novo,Maria do Carmo de Salvo Soares; Adoryan,Márcio Luiz. |
| Herbicides are widely used in soybean for weed control, and the selection pressure attributed to the repeated use of herbicides with similar modes of action on the same site has caused selection for resistant biotypes within and among previously susceptible species, such as Euphorbia heterophylla L., in relation to ALS enzyme inhibitors, in the states of Paraná, Rio Grande do Sul, and São Paulo, Brazil. Seeds of E. heterophylla were collected to examine possible new cases of resistant populations and to test alternative herbicide treatments to manage these populations, in the Caarapó region, State of Mato Grosso do Sul, Brazil, in areas where plants of this species have survived continuous herbicide applications. The experiment was carried out under... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Milkweed; Cross-resistance; Imidazolinone; Sulfonylurea. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000500007 |
| |
|
|
|
