Consulta: creatorFacets:"TORNISIELO,V.L."
Registros recuperados: 11
Data/hora: 16/06/2024 11:24:21

Leaching of Herbicides Commonly Applied to Sugarcane in Five Agricultural Soils
Provedor de dados: 87
Autores: GUIMARÃES,A.C.D.; MENDES,K.F.; CAMPION,T.F.; CHRISTOFFOLETI,P.J.; TORNISIELO,V.L.
ABSTRACT: Leaching intensity depends on the physicochemical properties of soils and herbicides. Consequently, a good understanding of this process is essential to determine mitigation measures to reduce or eliminate the risk of water contamination around areas with sugarcane crops. Therefore, the objective of this study was to analyze the leaching of ametryn, diuron, hexazinone, and metribuzin by using columns in five soils with different physicochemical properties cultivated with sugarcane. The radiolabeled herbicides with 14C were evaluated at six soil depths (0-0.05, 0.05-0.10, 0.10-0.15, 0.15-0.20, 0.20-0.25, and 0.25-0.30 m) and in the leachate after 200 mm rainfall simulation for 48 h. Herbicide leaching was mostly affected by soil type. Ametryn and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil behavior; Pre-emergent; Leachate; Mobility.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100228

Effect of Organic Matter on the Behavior and Control Effectiveness of Herbicides in Soil
Provedor de dados: 87
Autores: TAKESHITA,V.; MENDES,K.F.; ALONSO,F.G.; TORNISIELO,V.L.
ABSTRACT: With extensive use of herbicides in agricultural areas, the risk of contamination of groundwater and surface water by these products has become a worldwide concern. Practices of application or maintenance of soil organic residues that have begun to be used in agriculture for soil nutrition have demonstrated other benefits besides nutrient supplementation, such as reduced mobility and increased soil degradation of herbicides. Because it is the final destination of herbicides, soil and its constituents, especially organic matter in tropical soils, play a prominent role in processes that encompass the dynamics of herbicide molecules. In this context, it is necessary to know the influence of the organic matter and its constituents on the behavior of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sorption; Mobility; Biodegradation; Organic carbon.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100304

Shikimate accumulation, glyphosate absorption and translocation in horseweed biotypes
Provedor de dados: 87
Autores: CARDINALI,V.C.B.; DIAS,A.C.R.; MUELLER,T.C.; ABERCROMBIE,L.; STEWART JR.,C.N.; TORNISIELO,V.L.; CHRISTOFFOLETI,P.J.
In Brazil, few research works on mechanisms of weed resistance to glyphosate have been conducted so far. Therefore, this research aimed to study analytical procedures determining the relation between the concentration of plant shikimate after glyphosate application and the plant resistance to this herbicide; and evaluate the glyphosate absorption and translocation into two resistant ® and susceptible (S) horseweed biotypes to glyphosate. Horseweed plants with nine true leaves received glyphosate (720 g a.e. ha-1), and 2, 3, 4, 7 and 10 days after application (DAA) the concentration of shikimic acid was measured by HPLC. In another experiment, plants were treated with radiolabeled glyphosate (14C) (1.456 MBq mmol-1 specific activity) and radioactivity was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Conyza bonariensis; High Performance Liquid Chromatography; EPSPS; Selection; Radioactivity.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000100109

Diuron Sorption, Desorption and Degradation in Anthropogenic Soils Compared to Sandy Soil
Provedor de dados: 87
Autores: ALMEIDA,C.S.; MENDES,K.F.; JUNQUEIRA,L.V.; ALONSO,F.G.; CHITOLINA,G.M.; TORNISIELO,V.L.
ABSTRACT: The aim of this study was to evaluate diuron sorption, desorption and degradation in two anthropogenic soils (Terra Preta de Índio - TPI) in contrast to a sandy soil (Quartzarenic Neosol - NQo). Sorption-desorption studies were performed by the batch equilibrium method and biodegradation in biometric bottles using radiolabeled diuron in 14C. Freundlich coefficient (Kf) values ranged from 13.50 to 50.41 µmol(1-1/n) L1/n kg-1 in TPI-2 and TPI-1, respectively, indicating very high diuron sorption in anthropogenic soils, following the order: TPI-1 ≥ TPI-2 &gt; NQo (99.10, 98.95 and 60.8%, respectively). Diuron desorption was very low in anthropogenic soils, ranging from 1.36 (TPI-1) to 1.70% (TPI-2), and 24% to NQo. Accumulated diuron mineralization...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bound residue; Mineralization; Sorption isotherms; Amazonian soils.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100233

Transport of Atrazine Via Leaching in Agricultural Soil with Mineral Oil Addition
Provedor de dados: 87
Autores: MENDES,K.F.; SHIROMA,A.T.; PIMPINATO,R.F.; REIS,M.R.; TORNISIELO,V.L.
ABSTRACT: Adjuvants, such as mineral oils, are widely used in the application of herbicides by reducing the drift and evaporation of the droplets and by increasing herbicide uptake by the plant. However, little is known about how mineral oil behaves when in contact with the soil. Thus, the objective of this research was to evaluate the transport of atrazine via leaching with the addition of mineral oil in a soil agricultural under laboratory conditions. To quantify the concentration of the herbicide along the profile of the very clay soil column (30 cm), 14C-atrazine (ring-U-14C) was used with 16,667 Bq of radioactivity per column in volume of 200 mL solution and 0 (control), 1, and 2% mineral oil (v/v) was added in the application volume. Atrazine was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Adjuvant; Mobile herbicide; Triazine group; Leachate.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100194

Removal of Diuron and Hexazinone from Public Water Supply Using a Filter System
Provedor de dados: 87
Autores: CALEGARI,R.P.; MENDES,K.F.; MARTINS,B.C.; PIMPINATO,R.F.; BAPTISTA,A.S.; TORNISIELO,V.L.
ABSTRACT: The intensive use of pesticides, such as the herbicides diuron and hexazinone, leads to a concern about the preservation of the water quality of the water resources destined for human consumption. Currently, conventional water treatment techniques do not have high capacity to remove herbicides; therefore, the need to study other techniques arises. The present study aimed to evaluate the efficiency of the removal of diuron and hexazinone herbicides present in water through a commercial filtration system. The study was carried out in a filtration system composed of the following sequence of filters: sand filter and coconut shell activated granular carbon, polypropylene filter 20 mm, activated carbon filter with silver salts, polypropylene filter 5...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Activated granular coal; Reverse osmosis; Herbicide removal; Water treatment.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100346

Translocation and Root Exudation of Glyphosate by Urochloa brizantha and its Transport on Sugarcane and Citrus Seedlings
Provedor de dados: 87
Autores: VITI,M.L.; ALVES,P.A.T.; MENDES,K.F.; PIMPINATO,R.F.; GUIMARÃES,A.C.D.; TORNISIELO,V.L.
ABSTRACT: Glyphosate is easily exuded by the roots of plants. However, there is still some lack of information in the scientific literature as to whether Urochloa brizantha is capable of exuding glyphosate to influence the growth of crops such as sugarcane and citrus. Thus, the objective of this research was to evaluate the translocation and root exudation of 14C-glyphosate by U. brizantha and its transport in sugarcane and citrus. Sugarcane seedlings, varieties SP80-1842, and citrus ‘Limão Rosa’ (Citrus limonia L. Osbeck) were cultivated with U. brizantha around the seedlings. Using a microsphere, 14C-glyphosate was applied on the leaves of U. brizantha. The plants were cultured for 12 days after treatment (DAT). The radioactivity of the herbicide was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Behavior in the plant; Radioisotope; Chemical sensitivity.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100229

Influence of Soil Depth on Sorption and Desorption Processes of Hexazinone
Provedor de dados: 87
Autores: CHITOLINA,G.M.; MENDES,K.F.; ALMEIDA,C.S.; ALONSO,F.G.; JUNQUEIRA,L.V.; TORNISIELO,V.L.
ABSTRACT: Herbicides with a high leaching capacity, such as hexazinone, tend to reach deeper soils more easily, where retention of the product affects its availability in the soil solution. Therefore, it is important to understand the behavior of hexazinone at a variety of soil depths. The objective of this research was to evaluate the sorption and desorption of hexazinone throughout the soil profile. The sorption and desorption processes of 14C-hexazinone [triazine-6-14C] at three soil depths (0-10, 10-20, and 20-30 cm) were evaluated by the equilibrium batch method, and the radioactivity of the herbicide was quantified by liquid scintillation spectrometry. Five different concentrations of hexazinone (0.12, 0.19, 0.25, 0.31, and 0.38 µg mL-1) in a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Retention isotherms; Mobile herbicide bioavailability.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100216

Adsorption Isotherms of Diuron and Hexazinone in Drinking Water Using Four Agro-Industrial Residues
Provedor de dados: 87
Autores: TAKESHITA,V.; MENDES,K.F.; PIMPINATO,R.F.; TORNISIELO,V.L.
ABSTRACT: Materials with high organic carbon content are studied for the removal of herbicides from water, such as activated carbon. Low cost alternatives should be investigated for the substitution of this type of material in the removal of herbicides from water. In this context, the aim of this research was to evaluate four agro-industrial residues (white grape bagasse, corn straw, peanut shell and soybean hull) as adsorbents of diuron and hexazinone in drinking water. Samples of drinking water were collected from sources used for human consumption. Five concentrations (1, 2, 3, 4 and 5 mg mL-1) of each herbicide were added to the potable water samples. Each experimental unit consisted of 10 mL of a solution of water and herbicide with 0.1 g of each...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Herbicide retention; Adsorbents; Water remediation; Environmental risk.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100213

METHODOLOGIES TO STUDY THE BEHAVIOR OF HERBICIDES ON PLANTS AND THE SOIL USING RADIOISOTOPES
Provedor de dados: 87
Autores: MENDES,K.F.; MARTINS,B.A.B.; REIS,F.C.; DIAS,A.C.R.; TORNISIELO,V.L.
ABSTRACT In Brazil, the “Pesticide Act” (Act no. 7,802/89) has introduced new criteria related to the environment, public health and agronomic performance in the analyses of pesticide-related activities. Likewise, radioisotopes are used for environmental behavior and in planta studies, since they provide some advantages in comparison to chemical measures, including greater sensitivity, stepwise description of a particular element in a metabolic system, and pesticide position and detection through X-ray films and/or radio image (in plants) and liquid scintillation (in plants and soil), respectively. This review describes methodologies related to radioisotope utilization in studies on herbicide absorption, translocation and metabolism in plants, as well as...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Liquid scintillation spectrometry; Environmental behavior; 14C-labeled molecule.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100232

INFLUÊNCIA DA ADIÇÃO DE PALHA DE CANA-DE-AÇÚCAR NA DEGRADAÇÃO DE  14C-AMETRINA EM SOLO AREIA QUARTZOSA
Provedor de dados: 63
Autores: COSTA,M.A.; MONTEIRO,R.T.R.; TORNISIELO,V.L.
A degradabilidade do herbicida ametrina foi determinada em solo Areia Quartzosa com e sem adição de folhas secas de cana-de-açúcar, cultivada em campo, tratada ou não tratada com herbicida ametrina e em solo esterilizado. Amostras de 10g de solo com umidade ajustada à 70% da capacidade de campo e tratadas com 1ml de 14C-ametrina, na concentração de 8mg/ml e atividade específica de 800Bq/mg, foram distribuídas em frascos com tampa e incubadas em ambiente escuro, a 23oC, por 63 dias. Comparando a mineralização da ametrina em solo sem adição e com adição de folhas de cana-de-açúcar tratada ou não tratadas, observou-se 12 a 13 vezes mais 14CO2 desprendido em solos com a adição de palha. Nestes tratamentos foi observado, após 63 dias de incubação, maior número...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Degradação; Ametrina; Cana-de-açúcar; Herbicida; Solo areia quartzoa.
Ano: 1997
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161997000200001