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FORAGE PLANTS AND WEEDS THAT ARE SENSITIVE TO ATMOSPHERIC CLOMAZONE RESIDUALS Planta Daninha
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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Intoxication and Physiological Aspects of Forage Plants and Weeds Submitted to Clomazone Atmospheric Waste Planta Daninha
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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Urochloa brizantha Interference in the Phaseolus vulgaris Radicular System Fertilized with Phosphorus Planta Daninha
FREITAS,A.F.; MACIEL,J.C.; SILVA,M.M.; SANTOS,J.B..
ABSTRACT: Interference between root systems occurs below the ground surface long before the competition between plants is expressed in the shoot. Nutrients stand out for being limited in the soil, requiring supplementation, especially phosphorus. Thus, this study aimed at estimating, from sowing, visual characteristics in the root systems of bean plants from the Carioca variety (Phaseolus vulgaris) when in competition with brachiaria (Urochloa brizantha), considering also the application of phosphorus P2O5. A factorial design with six treatments was used resulting from the combination of three cultivation schemes (beans in isolated crops or in competition with one or two brachiaria plants), and the application or not of phosphate fertilizer (90 kg ha-1 of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Competition; Rhizotron; Weed.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100252
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