Controle de Brachiaria brizantha, com uso do glyphosate, na formação de pastagem de Tifton 85 (Cynodon spp.)

Santos, Maurinho Luiz dos; Ferreira, Francisco Affonso; Freitas, Francisco Cláudio Lopes de; Santos, L.D. Tuffi; Viana, José Marcelo Soriano; Rocha, Dalva Cassie; Fialho, Cíntia Maria Teixeira

doi:10.1590/s0100-83582007000100016

Cited by 16 publications

(26 citation statements)

References 5 publications

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“…These results indicate that B. brizantha showed greater sensitivity to fluazifop-p-butyl, when compared with Tifton 85 plants (Figures 1 and 2), in accordance with the studies of Santos et al (2006Santos et al ( , 2007Santos et al ( and 2008 who have reported increased tolerance of Tifton 85 to glyphosate. Smeda and Putnam (1990), and Friesen & Wall (1991) also observed fluazifopp-butyl herbicide susceptibility differences between grass species.…”

Section: Resultssupporting

confidence: 91%

“…When Santos et al, (2010) assessed the tolerance of Tifton 85 to glyphosate in two different application periods, they elucidated that plants exposed to this herbicide in cooler periods of the year (winter) have lower tolerance when compared with plants exposed to this herbicide in the summer. As reported by Santos et al (2006Santos et al ( , 2007Santos et al ( , 2008, Tifton 85 plants, in the summer, tend to have greater tolerance to glyphosate, possibly due to favorable conditions for growth and development, such as temperature and rooting, which may be related to the ease of metabolism, conjugation and, or, exudation of herbicides by plants, in addition to further development of starchy rhizomes, serving as reserves for regrowth of plants.…”

Section: Resultsmentioning

confidence: 75%

“…These are undesirable, due to their interference and multiplication, dominating the main forage in a short period of time (Santos et al, 2006(Santos et al, , 2007(Santos et al, , 2008.…”

Section: Introductionmentioning

confidence: 99%

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Brachiaria brizantha control by using fluazifop-p-butil on Tifton 85 pasture formation

Santos¹,

Ferreira²,

Freitas³

et al. 2012

R. Bras. Zootec.

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-This study was carried out with the aim of assessing the efficacy of the fluazifop-p-butyl herbicide to control Sixty days after application, plants were harvested at ground level and oven-dried. Regrowth was assessed in the same manner, 60 days after cutting, to determine their dry weight. Control of B. brizantha was noted to be above 50%, from doses of 218.75 g ha -1 at 45 days after application. The fluazifop-p-butylherbicide did not show to be efficient in the control of B. brizantha in the doses assessed and caused intoxication to Tifton 85 plants.

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Section: Resultssupporting

confidence: 91%

Section: Resultsmentioning

confidence: 75%

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Brachiaria brizantha control by using fluazifop-p-butil on Tifton 85 pasture formation

Santos¹,

Ferreira²,

Freitas³

et al. 2012

R. Bras. Zootec.

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“…All studies we found in the literature on weed control in pastures focused on studying the effects of herbicides on controlling unwanted plants (Silva et al 2005;Santos et al 2007;Trigueiro et al 2007). Practically no attention has been given to the study of interference relations between weeds and grasses, especially with regards to productivity and carrying capacity of the pasture.…”

Section: Introductionmentioning

confidence: 99%

Weeds alter the establishment of Brachiaria brizantha cv. Marandu

Marchi

Bellé²,

Foz³

et al. 2017

Trop. Grassl.-Forrajes Trop.

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Weeds alter the establishment of Brachiaria brizantha cv. Marandu Malezas afectan el establecimiento de AbstractThe present study evaluated the effects of different periods of coexistence among the main weeds and Marandu brachiaria grass (Brachiaria brizantha, now Urochloa brizantha) in newly sown pasture. The experiment was conducted in a randomized block with 4 replications, with treatments being 8 coexistence periods: 0, 15, 30, 45, 60, 75, 90 and 120 days after emergence. A phytosociological assessment of the weed community was carried out at the end of the coexistence periods, and weeds were eliminated from the appropriate treatment using herbicide. Key morphogenic parameters of the forages were assessed at the end of the experimental period and dry matter production was determined. Results indicated that the presence of weeds had negative impacts on the main morphogenic components, such as plant height, number of tillers and production of leaf and stem dry matter. The presence of weeds reduced productivity in Marandu, with 15 days competition being sufficient to reduce forage production by approximately 50%, suggesting that weed control measures should be adopted within 15 days following emergence of seedlings of Marandu and weeds.Keywords: Dry matter, interference, pasture renovation, weed competition. ResumenEn un latosol localizado en Sinop, Mato Grosso, Brasil se evaluaron los efectos de la infestación de las principales malezas de la zona (Hyptis suaveolens, Senna obtusifolia y Sida rhombifolia), en diferentes edades después de la siembra, en la producción y algunas características morfogénicas de la gramínea forrajera Brachiaria brizantha (ahora: Urochloa brizantha) cv. Marandu. Los tratamientos fueron dispuestos en un delineamiento experimental de bloques al azar con 4 repeticiones y consistieron en los períodos de convivencia: 0, 15, 30, 45, 60, 75, 90 y 120 días después de la emergencia de la gramínea. Al finalizar cada uno de estos períodos se realizó una evaluación fitosociológica de la comunidad infestante y se eliminaron las malezas utilizando un herbicida. Al término del período experimental se evaluaron los principales parámetros morfogénicos del pasto, así como la producción de materia seca. Los resultados mostraron un efecto negativo de las malezas en la altura de planta y el número de rebrotes, así como en la producción de materia seca de hojas y tallos. La presencia de las malezas redujo la producción del pasto en todos los tratamientos, variando de 50% (competencia durante los primeros 15 días) hasta 74% (120 días). Por tanto las medidas de control de las malezas deben ser adoptadas durante las 2 primeras semanas de convivencia con el pasto Marandu.Palabras clave: Competencia, interferencia, materia seca, renovación de pasturas.

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“…caused the death of the forage, regardless of the application time. Urochloa brizantha, being a forage of seminiferous propagation and initially having little reserves, is more sensitive to glyphosate in the early stages of development (Santos et al, 2007).…”

Section: Brachiaria Poisoning and Growthmentioning

confidence: 99%

Glyphosate Herbicide Use in Urochloa brizantha Management in Intercropping With Herbicide-Resistant Maize

et al. 2016

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The success of the intercropping among cultivated species depends on the adoption of practices that provide, in due course, greater competitive ability of a species over another. The objective of this study was to evaluate the use of glyphosate herbicide in the suppression of Brachiaria (signalgrass) intercropped with maize. The experiment was conducted in a randomized complete block design with four replications. The treatments were arranged in a 5 x 2 + 2 factorial arrangement, the first factor corresponding to the doses of glyphosate (48, 96, 144, 240, 480 g ha-1 of the acid equivalent (a.e)) and the second one to the vegetative stages of the signalgrass at the time of application (2 and 4 tillers). Two controls were added to the treatment list, comprising controls without herbicide application and hand removal of the signalgrass. The number of plants, tillers and dry matter of signalgrass was reduced with glyphosate. The increase of the glyphosate doses enhanced the injure to the forage plants, mainly when the compound was sprayed at the two-tiller vegetative stage. The dry matter of maize plants increased proportionally to the glyphosate dose. However, the height of the maize plants was not affected. The grain mass and productivity of maize grain increased with increasing dose of glyphosate. The maize yield was negatively influenced on the untreated control. Glyphosate at 96 and 144 g ha-1, when applied at 2 and 4 tiller stage, respectively, reduces the growth of signalgrass and does not affect the maize grain yield.

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Controle de Brachiaria brizantha, com uso do glyphosate, na formação de pastagem de Tifton 85 (Cynodon spp.)

Abstract: (0; 90, 180; 360; 720; 1,080; 1,440; and 1,800

Cited by 16 publications

References 5 publications

Brachiaria brizantha control by using fluazifop-p-butil on Tifton 85 pasture formation

Brachiaria brizantha control by using fluazifop-p-butil on Tifton 85 pasture formation

Weeds alter the establishment of Brachiaria brizantha cv. Marandu

Glyphosate Herbicide Use in Urochloa brizantha Management in Intercropping With Herbicide-Resistant Maize

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