Consulta: creatorFacets:"FREITAS,F.C.L."
Registros recuperados: 7
Data/hora: 13/06/2024 04:39:44

Leaching of Sulfentrazone in Soils from the Sugarcane Region in the Northeast Region of Brazil
Provedor de dados: 87
Autores: BRAGA,D.F.; FREITAS,F.C.L.; ROCHA,P.R.R.; ARAÚJO,A.G.D.; MELO,V.C.
Sulfentrazone leaching potential is dependent on soil properties such as strength and type of clay, organic matter content and pH, and may result in ineffectiveness of the product and contamination of groundwater. The objective of this study was to evaluate sulfentrazone leaching in five soils of the sugarcane region in the Northeast Region of Brazil, with different physical and chemical properties, by means of bioassay and high-performance liquid chromatography (HPLC) resolution. The experiment was conducted in a split plot in a completely randomized design. The plots had PVC columns with a 10 cm diameter and being 50 cm deep, filled with five different soil classes (quartzarenic neosol, haplic cambisol, yellowish-red latosol, yellowish-red acrisol, and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Herbicide; Bioassay; Sorption; Mobility.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000100161

Management Of Commelina benghalensis with Saflufenacil in Shaded Environments
Provedor de dados: 87
Autores: SANTOS JUNIOR,A.; FREITAS,F.C.L.; SANTOS,I.T.; SILVA,D.C.; PAIXÃO,G.P.; SEDIYAMA,C.S.
ABSTRACT: The repetitive use of glyphosate in the control of weeds in eucalyptus plantations has selected tolerant species such as Commelina benghalensis. Therefore, the use of herbicides of other mechanisms of action, such as saflufenacil, in rotation or combination with glyphosate, is necessary to reduce damages caused by C. benghalensis, whose sensitivity to herbicides can be influenced by the shading caused by the eucalyptus crop. This study aimed to assess the efficiency of saflufenacil in the management of C. benghalensis at different shading levels. Three experiments were carried out regarding a certain shading level (cultivation environment with 0, 40, and 55% shade). The experimental design was a randomized block design with five herbicide doses...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Shading; Chemical control; Biomass allocation; Weed; Benghal dayflower.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100249

Pre-Harvest Desiccation in Productivity and Physiological Quality of Cowpea Seeds
Provedor de dados: 87
Autores: ASSIS,M.O.; ARAUJO,E.F.; FREITAS,F.C.L.; SILVA,L.J.; ARAUJO,R.F.
ABSTRACT: Pre-harvest desiccation is an important strategy to anticipate harvesting, preventing the seed from being left in the field in unfavorable climatic conditions. However, little is known about the use of desiccants and their application times on cowpea (Vigna unguiculata). The objective of this study was to evaluate the effect of desiccant application at different seasons and of desiccant herbicides on productivity and physiological quality of cowpea seeds. Five dessicants were evaluated: paraquat, paraquat sequential application, glufosinate- ammonium, glyphosate with sequential application of paraquat and paraquat + diuron mixture applied in four seasons: 50% of the pods with green coloration and with seeds formed (season I); 70% of the pods in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vigna unguiculata; Desiccants; Vigor; Paraquat; Glyphosate; Glufosinate-ammonium.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100214

Herbicide Mixtures to Control Dayflowers and Drift Effect on Coffee Cultures
Provedor de dados: 87
Autores: FREITAS,N.M.; FREITAS,F.C.L.; FURTADO,I.F.; TEIXEIRA,M.F.F.; SILVA,V.F.
ABSTRACT: The dayflower species Commelina benghalensis and C. diffusa are among the main weeds in coffee crops. The purpose of this study was to evaluate the efficacy of herbicides/herbicide mixtures in controlling dayflower species and to evaluate the possible intoxication of coffee cultures, as well as the effect of mixture interactions. Two experiments were conducted, the first one in a 12 x 2 factorial arrangement with 12 herbicides/mixtures (glyphosate, glyphosate + metsulfuron-methyl, glyphosate + flumioxazin, glyphosate + 2.4-D, glyphosate + oxyfluorfen, glyphosate + carfentrazone-ethyl, metsulfuron-methyl, flumioxazin, 2.4-D, oxyfluorfen and carfentrazone-ethyl) and two dayflower species (C. benghalensis and C. diffusa) and the second one, in a 6 x...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antagonism; Coffea arabica; Commelina benghalensis; Commelina diffusa; Synergism.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100248

Weed Growth and Dry Matter Partition Under Water Restriction
Provedor de dados: 87
Autores: LIMA,M.F.P.; DOMBROSKI,J.L.D.; FREITAS,F.C.L.; PINTO,J.R.S.; SILVA,D.V.
ABSTRACT The capacity of a weed to adapt to the restriction of growth factors is directly related to its ability to compete for those resources with the cultivated species. An experiment was conducted to evaluate the effect of water restriction on the growth and biomass partitioning of four species of weeds. The experimental design used randomized blocks, with five replications. The treatments were arranged in a 4 x 2 factorial, with the first factor being the weed species (Waltheria indica, Crotalaria retusa, Cleome affinis and Commelina benghalensis) and the second, two water regimes: daily irrigation (Irr) and water restriction (WR). The number of leaves, leaf area, dry mass of the plant and its parts (root, stem and leaf), and the mass distribution...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Waltheria indica; Crotalaria retusa; Cleome affinis; Commelina benghalensis; Soil water deficit.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000400701

Ametryn Leaching in Soils from the Sugarcane Region in Northeastern Brazilian
Provedor de dados: 87
Autores: SILVA,K.S.; FREITAS,F.C.L.; BRAGA,D.F.; DOMBROSKI,J.L.D.; SANTOS,A.F.B.
ABSTRACT Ametryn is one of the most widely used herbicides in the sugarcane culture. Little is known about the interactions between this herbicide and the attributes of soils in the sugarcane region of northeastern Brazil. This knowledge, before recommending herbicide, will minimize the negative effects on the environment, particularly on water resources, and will ensure weed control efficacy. In this work, ametryn leaching potential was estimated through bioassays and chromatography, in five soils from the sugarcane region in northeastern Brazil: Quartzarenic Neosol (Entisol); Red Argisol (Ultisol); Ferrihumiluvic Spodosol (Spodosols); Red-Yellow Acrisol (Oxisol) and Haplic Cambisol (Inceptisols). To achieve this, columns were prepared with samples of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Herbicide; Liquid chromatography; Bioassay; Mobility.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000400839

Use of Fertiactyl Pos® for Protection of Eucalyptus Plants Subjected to Herbicide Drift
Provedor de dados: 87
Autores: SANTOS JR.,A.; FREITAS,F.C.L.; SANTOS,I.T.; SILVA,D.C.; ALCÁNTARA-DE LA CRUZ,R.; FERREIRA,L.R.
ABSTRACT: Herbicide drift, due to application failures, can cause intoxication in eucalyptus plants, compromising their growth. However, the addition of protective products such as Fertiactyl Pós® to the syrup has been shown to be efficient in reducing intoxication of eucalyptus plants exposed to herbicide drift. Given this, the objective of the present study was to evaluate the protective effect of Fertiactyl Pós® on the reduction of damage caused by the herbicides glyphosate, 2,4-D and the glyphosate + 2.4-D mixture in eucalyptus plants. The experiment was conducted in a 3 x 2 + 1 factorial scheme, corresponding to three herbicides: glyphosate (1,440 g ha-1), 2,4-D (680 g ha-1), glyphosate + 2.4- D (1,440 g ha-1 + 680 g ha-1); two doses of Fertiactyl...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glyphosate; 2.4-D; Plant detoxification; Herbicide mixture.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100235