Consulta: creatorFacets:"SOUZA,M.F."
Registros recuperados: 7
Data/hora: 13/06/2024 04:12:48

PERSISTENCE OF IMIDAZOLINONES IN SOILS UNDER A CLEARFIELD SYSTEM OF RICE CULTIVATION
Provedor de dados: 87
Autores: SOUZA,M.F.; C. NETO,M.D.; MARINHO,M.I.; SARAIVA,D.T.; FARIA,A.T.; SILVA,A.A.; SILVA,D.V.
ABSTRACT The commercial mixture of imazethapyr and imazapic herbicides has been used for the control of red rice and several other species of weeds found in rice crops; this system called Clearfield. However, its use may limit the succession of non-tolerant crops for long residual activity. The research objective with this work was to determine the persistence of imazethapyr, imazapic and their mixture in three soils in the Brazilian state of Tocantins. Three experiments were conducted in a completely randomized design with four replications, each corresponding to the evaluated soil (Haplic Plinthosol (FX), red-yellow Latosol (LVA) and Haplic Gleysol (GX)). The treatments were arranged in a split plot design, with the allocated plots herbicides...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carryover; Imazapic; Imazethapyr; Only(r).
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000300589

Estimation of Sulfentrazone Leaching in Isolated Application and in Mixture with Glyphosate
Provedor de dados: 87
Autores: LANGARO,A.C.; BARROS,J.P.A.; SOUZA,M.F.; SILVA,E.M.G.; SILVA,A.A.
ABSTRACT: As an alternative to control of resistant biotypes, farmers have resorted to the use of herbicides that have residual soil activity and good pre-emergence action. One of the most used mixtures in Brazil is that of sulfentrazone + glyphosate. When a herbicide has a pre-emergence action, small leaching of its molecules is necessary for its superficial incorporation into the soil, where most of the weed seeds are found. However, if excessive leaching occurs, the herbicide may have reduced efficiency in controlling weed, increasing the risks of groundwater contamination. In this study, sulfentrazone leaching was evaluated in columns with soil, in isolated applications and in mixture with formulations of glyphosate (Roundup Ready®, Roundup Ultra® and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Herbicide; Environmental impact; Soil; Bioassay.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100217

Levels of nutrients and grain yield of maize intercropped with signalgrass (Brachiaria) in different arrangements of plants
Provedor de dados: 87
Autores: FREITAS,M.A.M.; VALADÃO SILVA,D.V.; SOUZA,M.F.; SILVA,A.A.; SARAIVA,D.T.; FREITAS,M.M.; CECON,P.R.; FERREIRA,L.R.
Competition between maize and signalgrass can economically cripple the intercropping by the reduced yield of maize and dry matter content of the forage. In seeking to define plant arrangements which make this system more efficient, this research was held with the objective of assessing the effects of interference of densities of signalgrass (Urochloa Brizantha) on nutrition and on maize grain yield. Two field experiments were conducted in a randomized block design with four replications. Treatments were arranged similarly in both experiments, in a 2 x 4 factorial design, the first factor being the dose of Nicosulfuron herbicide applied (0 and 8 g ha-1) and the second factor being the forage seeding rates (0, 2, 4 and 6 kg of seeds per hectare). The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nicosulfuron; Competition in intercropping; Cropping spacing.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000100049

Effects of Adding Organic Matter to a Red-Yellow Latosol in the Sorption and Desorption of Tebuthiuron
Provedor de dados: 87
Autores: TEIXEIRA,M.F.F.; SILVA,A.A.; NASCIMENTO,M.A.; VIEIRA,L.S.; TEIXEIRA,T.P.M; SOUZA,M.F.
ABSTRACT: Tebuthiuron is one of the most widely used herbicides in the sugarcane culture and its characteristic is the long persistence in soil. When used without knowing its interactions with soil attributes, it can reduce the sustainability of cropping systems and contaminate surface and groundwaters. In this research, by using a high-performance liquid chromatography, the effects of adding organic matter in a Red-Yellow Latosol were evaluated, as for the sorption and desorption of tebuthiuron. It was concluded that there is a direct relation between the sorption of tebuthiuron and the organic matter content in Red-Yellow Latosols and there is an inverse relation for desorption. The hysteresis index was lower in samples with high organic matter content.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chromatography; Hysteresis index; Persistence.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100283

Glyphosate Herbicide Use in Urochloa brizantha Management in Intercropping With Herbicide-Resistant Maize
Provedor de dados: 87
Autores: SILVA,D.V.; FREITAS,M.A.M.; SOUZA,M.F.; QUEIROZ,G.P.; MELO,C.A.D.; SILVA,A.A.; FERREIRA,L.R.; REIS,M.R.
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,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Urochloa brizantha; Crop-livestock integration.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000100133

Selection of Indicator Species of the Tembotrione Sorption in Soils with Different Attributes
Provedor de dados: 87
Autores: FARIA,A.T.; SILVA,E.M.G.; PEREIRA,G.A.M.; SOUZA,M.F.; SILVA,A.A.; REIS,M.R.
ABSTRACT: Studies on herbicide behavior in soils may be performed using biological and chemical methods. The efficiency of the biological method depends on the indicator species sensitivity to low herbicide concentrations in the soil solution. Among the herbicides commonly used in Brazil for corn cultivation, tembotrione stands out. In the last agricultural seasons, the intoxication of some crops when cultivated in succession to corn has been reported, which may be attributed to tembotrione recommendations without the knowledge of their interactions with colloids of tropical soils. In this research, we selected an indicator plant species of tembotrione residues in the soil after sorting 12 species. The sorption of this herbicide was estimated in two...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioassay; Environmental impact; Herbicides; Technical efficiency.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100327

Sorption and Desorption of Tembotrione and its Metabolite AE 1417268 in Soils with Different Attributes
Provedor de dados: 87
Autores: FARIA,A.T.; FIALHO,C.A.; SOUZA,M.F.; FREITAS,N.M.; SILVA,A.A.
ABSTRACT: Tembotrione is registered in Brazil for maize and is used in large areas of the country in each harvest. In recent years, producers have reported carryover effects of this herbicide in succeeding crops to maize. This fact can be attributed to tembotrione recommendations without knowing their interactions with tropical soils colloids. In this study, using high-performance liquid chromatography, it was possible to evaluate the influence of chemical and physical attributes on the sorption and desorption of tembotrione, as well as its metabolite AE 1417268, on seven soils from different regions of Brazil. The coefficients referring to sorption and desorption, as well as the hysteresis index (Kf, 1/n and H) of tembotrione and its metabolite were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Herbicide; Sorption coefficient (Kf); Hysteresis; Environmental impact.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100293