Consulta: creatorFacets:"SANTOS,J.B."
Registros recuperados: 9
Data/hora: 11/06/2024 00:40:05

CHLOROPHYLL FLUORESCENCE IN Brachiaria decumbens AND Brachiaria ruziziensis SUBMITTED TO HERBICIDES
Provedor de dados: 87
Autores: 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

Urochloa brizantha Interference in the Phaseolus vulgaris Radicular System Fertilized with Phosphorus
Provedor de dados: 87
Autores: 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

Remediation of Soils Contaminated by Pesticides Using Physicochemical Processes: a Brief Review
Provedor de dados: 87
Autores: BALDISSARELLI,D.P.; VARGAS,G.D.L.P.; KORF,E.P.; GALON,L.; KAUFMANN,C.; SANTOS,J.B.
ABSTRACT: After years of pesticide application, often indiscriminately, damage has been caused to the environment, as well as to agronomic crops grown in contaminated areas. In water treatment, techniques based on physical and/or physicochemical processes are used, being formed secondary oxidizing agents responsible for the mineralization of contaminants present in the herbicides, thus causing the degradation process. However, few studies have demonstrated the effectiveness of these techniques in soils. The aim of this study was to review the existing studies, presenting the main techniques used for remediation of soils contaminated with pesticides. Emphasis was placed on electrokinetics, advanced oxidative processes, soil washing, chemical or solvent...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil remediation; Environmental sustainability; Agricultural contaminants.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100302

Does the Ingestion of Isoxaflutole Herbicide Affect the Midgut and Salivary Glands of Pentatomidae Predators?
Provedor de dados: 87
Autores: GONÇALVES,T.S.; SOARES,M.A.; SANTOS,C.A.; SANTOS,D.A.; SANTOS,J.B.; BARROSO,G.A.
Podisus nigrispinus is a generalist predator naturally occurring in agricultural and forestry systems that effectively contributes to the population balance of phytophagous insects, especially defoliating caterpillars. Histological changes were evaluated in the salivary glands and midgut of P. nigrispinus caused by ingestion of systemic herbicide isoxaflutole. These predator females were fed with leaves of eucalyptus plants, Tenebrio molitor pupae or water, contaminated or not by herbicide. Salivary glands and midguts were dissected, processed and analyzed under a light microscope. Activity level and cell morphology of the salivary glands and midgut showed differences among insects fed on plants, contaminated water or pupae. The epithelia of the salivary...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biological control; Cell apoptosis; Digestive system; Morphological change; Podisus nigrispinus.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000100125

FORAGE PLANTS AND WEEDS THAT ARE SENSITIVE TO ATMOSPHERIC CLOMAZONE RESIDUALS
Provedor de dados: 87
Autores: 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

Intoxication and Physiological Aspects of Forage Plants and Weeds Submitted to Clomazone Atmospheric Waste
Provedor de dados: 87
Autores: 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

STRUCTURAL EVALUATION OF DAMAGE CAUSED BY HERBICIDE CLOMAZONE IN LEAVES OF ARBORESCENT SPECIES NATIVE TO BRAZIL
Provedor de dados: 87
Autores: CABRAL,C.M.; SANTOS,J.B.; FERREIRA,E.A.; COSTA,S.S.D.; DALVI,V.C.; FRANCINO,D.M.T.
ABSTRACT Herbicide clomazone is highly soluble in water, which increases the risk of leaching, resulting in contamination of sources of groundwater and waterways, affecting non-target organisms, with possible degradation of riparian areas. The objective of this work was to investigate the possible anatomical modifications of the leaf tissue of twelve arborescent species native to Brazil grown in soil contaminated by clomazone, in order to microscopically characterize leaf damage caused by the herbicide, and investigate whether the structural damage precedes visible damage. Through micro morphometrics, the thickness and the area occupied by the tissues were measured in a cross section of the leaves of the forest species: adaxial and abaxial epidermis,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Inga marginata; Handroanthus serratifolius; Forest species; Phytoremediation; Leaf anatomy.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100230

HERBICIDE SELECTIVITY TO SIGNAL GRASS AND CONGO GRASS
Provedor de dados: 87
Autores: 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

Physiological Characteristics of Trees Recommended for the Phytoremediation of Soils Contaminated with Herbicides
Provedor de dados: 87
Autores: AGUIAR,L.M.; SANTOS,J.B.; FERREIRA,E.A.; CABRAL,C.M.; PEREIRA,I.M.; BARROSO,G.M.; SANTOS,N.M.C.
ABSTRACT: Herbicides are inputs with a high volume of use in agricultural production systems for weed management; however, the environmental contamination they cause is a reality. The objective of this research was to evaluate the tolerance of tree species used for the phytoremediation of herbicides in the soil, to atrazine, clomazone and 2,4-D, through the evaluation of photosynthetic indices. Thus, a randomized block design experiment was conducted with four replications, in a 4 x 5 factorial arrangement, where the first factor represented the herbicides atrazine, clomazone and 2,4-D and the control treatment without herbicide (water). The second factor consisted in the use of pre-selected tree species for the phytoremediation of soils with residues of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Photosynthesis visual intoxication atrazine clomazone 2; 4-D.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100312