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Registros recuperados: 6
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CHLOROPHYLL FLUORESCENCE IN Brachiaria decumbens AND Brachiaria ruziziensis SUBMITTED TO HERBICIDES 87
SILVEIRA,R.R.; SANTOS,M.V.; FERREIRA,E.A.; SANTOS,J.B.; SILVA,L.D..
ABSTRACT Different doses of herbicides can promote a differentiated physiological response in grasses of the same genus. This study has been proposed in order to evaluate physiological responses of B. ruziziensis and B. decumbens submitted to glyphosate and fluazifop-p-butyl. Treatments were distributed in a 2 x 6 factorial design with five repetitions, being two grasses: B. decumbens cv. Basilisk and B. ruziziensis with six doses of herbicides: 0.00; 0.25; 0.50; 1.00; 1.5 and 2.00 times the commercial dose recommended by manufacturers. At 7, 15, 21, and 30 days after herbicide application (DAA) chlorophyll luminous energy uptake efficiency was evaluated. Plants subjected to glyphosate at 7 days after application (DAA) showed minimum fluorescence of 270...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Physiology; Fluazifop-p-butyl; Glyphosate; Electron transport rate; Urochloa.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100248
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FORAGE PLANTS AND WEEDS THAT ARE SENSITIVE TO ATMOSPHERIC CLOMAZONE RESIDUALS 87
SILVA,M.M.; SANTOS,J.B.; FERREIRA,E.A.; BRITO,O.G.; DONATO,L.M.S.; SANTOS,M.V..
ABSTRACT The use of indicator plants can be an effective alternative in monitoring the presence of toxic molecules in the air, such as herbicides. Thus, in the goal of this study is to assess the sensitivity of forage plants and weeds to atmospheric residual concentrations of clomazone. The treatments were arranged in a 6x5 factorial scheme, with the first factor corresponding to the plant species triticale (Triticosecale rimpaui), maize (Zea mays), sorghum (Sorghum bicolor), palisade grass (Urochloa brizantha), purslane (Portulaca oleracea) and signal grass (Urochloa decumbens), and the second factor to doses of 0, 90, 180, 270 and 360 g ha-1 clomazone doses (equivalent to atmospheric concentrations of 0.0, 0.05, 0.10, 0.15 and 0, 20 mg L-1). Twelve days...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Triticosecale rimpaui Wittm.; Zea mays L.; Sorghum bicolor L.; Urochloa brizantha A. Rich; Portulaca oleracea L.; Urochloa decumbens Stapf..
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100257
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HERBICIDE SELECTIVITY TO SIGNAL GRASS AND CONGO GRASS 87
ANÉSIO,A.H.C.; SANTOS,M.V.; SILVEIRA,R.R.; FERREIRA,E.A.; BRAZ,T.G.S.; TUFFI SANTOS,L.D.; SANTOS,J.B..
ABSTRACT This study was conducted in order to evaluate the selectivity of signal grass and congo grass, submitted to post-emergence herbicide application. The experiment was conducted under greenhouse conditions, in Diamantina, Minas Gerais state, and it was arranged in a randomized block design, with five replications. Treatments were set in factor scheme (8 x 2) + 2. Eight herbicides (nicosulfuron; clomazone; glyphosate; fluazifop-p-butyl + fomesafen; lactofen; fomesafen; fluazifop-p-butyl and mesotrione) were applied in doses recommended by the manufacturer on two fodder species: Brachiaria decumbens cv. Basilisk (signal grass) and Brachiaria ruziziensis (congo grass); in addition, there were two control samples without herbicide application, for a...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Brachiaria decumbens; Brachiaria ruziziensis; Grass control; Pasture; Weeds forage.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100260
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Intoxication and Physiological Aspects of Forage Plants and Weeds Submitted to Clomazone Atmospheric Waste 87
SILVA,M.M.; SANTOS,J.B.; SANTOS,E.A.; SANTOS,M.V.; SARDINHA,L.T.; RIBEIRO,V.H.V..
ABSTRACT: Herbicide volatilization may generate environmental and agricultural problems and result in visual or physiological contamination of non-target plant species. Thus, the goal of this research was to study the fluorescence of chlorophyll a in weeds and fodder plants under the effect of clomazone in the form of atmospheric waste. The experiment was conducted under field conditions designed in randomized blocks with four replications, in a 6 x 4 factor scheme, with six plant species: Dolichos lablab, bicolor Sorgum, Urochloa brizantha, Macrotyloma axillare, Portulaca oleracea and Sida rhombifolia. There were four solutions containing 0, 360, 720 and 1,080 g ha-1 of clomazone (0, 0.05, 0.10 and 0.15 mg L-1, considered as the volume). Seedbeds were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Dolichos lablab L.; Sorgum bicolor L. Moench; Urochloa brizantha Stapf; Macrotyloma axillare E. Mey; Shut tunnels.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100210
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Phytosociology in Degraded and Renewed Pastures in Agrosilvopastoral Systems 87
DIAS,R.C.; SANTOS,M.V.; FERREIRA,E.A.; BRAZ,T.G.S; FIGUEIREDO,L.V.; CRUZ,P.J.R.; SILVA,L.D..
ABSTRACT: In pastures, the incidence of weeds reduces the productivity and quality of forage. The identification of the weed species in pastures is fundamental to choose the renewal method. Thus, the objective of this work was to perform phytosociology before and after the renewal of a Brachiaria decumbens pasture, with the implantation of agrosilvopastoral systems. Eighteen different crop arrangements for pasture renewal were evaluated. The renewal systems were by eucalyptus integration (at 12 x 2 m or 12 x 3 m spacings) with maize, Brachiaria brizantha cv. Marandu (palisade grass) and/or Macrotyloma axillare (perennial horsegram), or monoculture and intercropping of palisade grass and perennial horsegram, as well as the evaluation of the application or...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Intercropping; Crop-livestock-forest; Weed; Pasture management.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100274
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Productivity, Control, and Decomposition of Irrigated Forage Species under Glyphosate Doses and Shading 87
BRANT,M.C.; TUFFI SANTOS,L.D.; FREITAS,I.C.; FRAZÃO,L.A.; SILVA,M.S.N.; MACHADO,V.D.; SANTOS,M.V..
ABSTRACT: Light intensity available in growing environments may influence the susceptibility of plants to glyphosate and decomposition of their residues. This study aimed to assess the productivity, control, and decomposition of forage straw submitted to glyphosate doses and exposed to full sun and 50% shade. Two experiments were carried out, one for Piatã grass (Urochloa brizantha cv. Piatã) and other for Tanzania grass (Megathyrsus maximus cv. Tanzania). The experimental design was a randomized block design with strip-plot and four replications. Two growing environments (at full sun and under 50% shade) were installed in strips in the growing area, combined with six doses of glyphosate (0, 360, 720, 1,080, 1,440, and 1,800 g a.e. ha-1) used for forage...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Crop-livestock-forest integration system; No-tillage system; Post-emergence desiccation; Luminous intensity; Urochloa; Megathyrsus.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100329
Registros recuperados: 6
Primeira ... 1 ... Última
 

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