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Glyphosate as Growth Regulator for Bahiagrass and Broadleaf Carpetgrass Planta Daninha
DIAS,R.C.; DADAZIO,T.S.; TROPALDI,L.; CARBONARI,C.A.; VELINI,E.D..
ABSTRACT: The objective of this work was to evaluate the effect of glyphosate herbicide as growth regulator on two turfgrasses bahiagrass and broadleaf carpetgrass. The experiments were conducted in a greenhouse, using a completely randomized design, with 10 glyphosate rates (0, 5.625, 11.25, 22.5, 45, 90, 180, 360, 720, and 1.440 g a.e. ha-1) and four replicates. Bahiagrass and broadleaf carpetgrass plants were transplanted to 2 liter pots filled with a clayey soil. Phytotoxicity and green cover index (GCI) were evaluated through digital analysis; plant height at 7, 14, 21, and 28 days after application (DAA); and dry biomass of cuttings at 28 DAA. The glyphosate rates of 5.625 to 22.5 g a.e. ha-1 (for bahiagrass) and up to 90 g a.e. ha-1 (for broadleaf...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Axonopus compressus; Phytotoxicity; Turfgrass; Herbicide; Paspalum notatum.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100158
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Effects of 2,4-D Herbicide on Species of the Digitaria Genus Planta Daninha
GAZOLA,T.; DIAS,M.F.; DIAS,R.C.; CARBONARI,C.A.; VELINI,E.D..
ABSTRACT: The objective of this work was to evaluate the effects of the 2,4-D herbicide on the growth and development of Digitaria insularis and Digitaria horizontalis plants under different climatic conditions. Two greenhouse experiments were conducted in a completely randomized design, with 11 treatments (rates of the herbicide) and four replications. Rate-response curves were determined for the 2,4-D rates of 0, 50.37, 100.75, 201.5, 403, 806, 1,612, 3,224, 6,448, 12,896, and 25,792 g a.i. ha-1. The plants presented growth stimulus with low rates of 2,4-D in the autumn-winter period, but this stimulus was not found in the spring-summer period. The plants subjected to application of high rates of 2,4-D had significantly lower growth and development than...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Synthetic auxin; Digitaria insularis; Digitaria horizontalis; Hormesis.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100173
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Phytosociology in Degraded and Renewed Pastures in Agrosilvopastoral Systems Planta Daninha
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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Dynamics of Clomazone Formulations Under Different Applications Conditions Planta Daninha
TROPALDI,L.; BRITO,I.P.F.S.; DIAS,R.C.; TRINDADE,M.L.B.; CARBONARI,C.A.; VELINI,E.D..
ABSTRACT: Maintenance of straw on the soil surface in sugarcane production areas can influence weed occurrence and herbicide dynamics. After application, considerable losses of clomazone can occur as a result of its physicochemical characteristics. For this reason, novel formulations have been developed. In addition to the conventional formulation, microencapsulated formulations are currently available. Thus, the aim of this study was to observe and compare the effect of clomazone formulations under different application conditions. For this purpose, the experiment was carried with 12 treatments in a completely randomized design, with four replications, using clomazone formulations (1,200 g a.i. ha-1), on soils with different moisture levels, in the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Straw; Herbicide; Volatilization; Ipomoea nil (L.) Roth; Urochloa decumbens (Stapf.) R.D.Webster; Panicum maximum Jacq.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100274
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