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| Agostinetto,D.; Fontana,L.C.; Vargas,L.; Perboni,L.T.; Polidoro,E.; Silva,B.M.. |
| Determining the periods of weed competition with crops helps the producer to choose the most appropriate time to use weed control practices. This strategy allows for the reduction of the number of herbicide applications, reducing costs and the environmental impact of pesticides. The objectives were to determine the period before the interference (PBI) of crabgrass (Digitaria ciliaris) competing with flooded rice, the critical period of interference prevention (CPIP) of crabgrass with soybean and the effects of competition on the grains yield and their components. Experiments were conducted with the coexistence of BRS Querência rice cultivar with crabgrass, for periods of 0, 7, 14, 21, 28, 35, and 110 days after emergency (DAE) and Fundacep 53RR soybean... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Digitaria ciliaris; Oryza sativa; Glycine max; Interference. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582014000100004 |
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| Vargas,L.; Fraga,D.S.; Agostinetto,D.; Mariani,F.; Duarte,T.V.; Silva,B.M.. |
| Chemical control with herbicides, especially glyphosate, is the main method used to control ryegrass. However, the repeated use of glyphosate has selected resistant ryegrass biotypes. Thus, the ACCase inhibitor herbicides have become the main alternative to control glyphosate-resistant biotypes, being widely used by farmers in Rio Grande do Sul. Repeated use of ACCase inhibitors, in turn, have selected ryegrass biotypes resistant to this herbicide mechanism. Thus, the objective of this study was to evaluate the response of ryegrass biotypes to different clethodim rates by dose-response curves. Increasing doses (0, 12, 24, 48, 72, 96, 144 and 192 g a.i. ha-1) of the herbicide clethodim were applied at the 3-4 ryegrass leaf stage. The variables control at 14... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ryegrass; Cyclohexanodiones; Herbicide resistance. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582013000400015 |
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| Neves,F.J.; Carvalho,A.C.G.; Rocha,N.G.; Silva,B.M.; Sales,A.R.K.; Castro,R.R.T. de; Rocha,J.D.; Thomaz,T.G.; Nóbrega,A.C.L.. |
| To determine the hemodynamic mechanisms responsible for the attenuated blood pressure response to mental stress after exercise, 26 healthy sedentary individuals (age 29 ± 8 years) underwent the Stroop color-word test before and 60 min after a bout of maximal dynamic exercise on a treadmill. A subgroup (N = 11) underwent a time-control experiment without exercise. Blood pressure was continuously and noninvasively recorded by infrared finger photoplethysmography. Stroke volume was derived from pressure signals, and cardiac output and peripheral vascular resistance were calculated. Perceived mental stress scores were comparable between mental stress tests both in the exercise (P = 0.96) and control (P = 0.24) experiments. After exercise, the blood pressure... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cardiovascular system; Blood pressure; Exercise test; Stroop test. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2012000700007 |
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| Mariani,F.; Vargas,L.; Agostinetto,D.; Silva,D.R.O.; Fraga,D.S.; Silva,B.M.. |
| Populações de azevém resistente aos inibidores da enzima ALS têm aumentado rapidamente nos campos cultivados. Para o manejo da resistência, são necessários estudos de herança da resistência, os quais permitem entender a evolução da resistência, a estrutura genética da população e a dinâmica de adaptação dos biótipos resistentes. Este trabalho teve como objetivo identificar o tipo de herança, o número de genes envolvidos e o grau de resistência dos biótipos de azevém, homozigotos e heterozigotos, resistentes ao iodosulfuron. A partir da seleção dos biótipos homozigoto resistente (R) e homozigoto suscetível (S), foram realizados cruzamentos (R x S) para obtenção de plantas F1, e estas, cruzadas para obtenção da F2, e realizaram-se retrocruzamentos entre... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lolium spp.; Genética; Herbicida. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000200351 |
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