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| Registros recuperados: 35 | |
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| PESSOA, M. C. P. Y.; GOMES, M. A. F.; SOUZA, M. D. de; CERDEIRA, A. L.; NEVES, M. C.; NICOLELLA, G.. |
| Este trabalho teve por objetivo um estudo de simulação, utilizando o CMLS-94, em área de agricultura intensiva de cana-de-açúcar, localizada na microbacia do córrego Espraiado em Ribeirão Preto (SP), de importância internacional, dada a presença do Aquífero Botucatu (Guarani). Os dados referentes a cultura de cana-de-açúcar tipo soqueira, predominante na área, aos principais tipos de solo na área estudada, quais sejam Latossolo Roxo (LR), Latossolo Vermelho-Escuro (LE) e Areia Quartzosa (AQ), foram incorporados as bases de dados do CMLS-94, assim como a informação do nome do arquivo contendo dados climáticos diários de Ribeirão Preto (SP) (período 1986-1989). Os herbicidas utilizados foram atrazina, tebuthiuron e diuron, por serem os mais usados na área de... |
| Tipo: Folhetos |
Palavras-chave: Agricultura intensiva; Águas subetrrâneas; Lençoal freático; Herbicida; Simulação; Qualidade da água; Agrotóxico; Solo; Contaminação; Cana de açúcar; Atrazina; Herbicides; Environmental fate; Simulation models; Diuron; Tebuthiuron. |
| Ano: 1999 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/13121 |
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| AZEVEDO, D. M. P de. |
| Plantas daninhas: conceito, características, impacto, classificação, reprodução, disseminação, competição, manejo, prevenção, erradicação, controle; Alachlor; Trifluralin; Amônio glufosinato; Clethodim; Clomazone; Cynazine; Diuron; Paraquat; Fluazifop; Linuron; Msma; Norflurazon; Oxadiazon; Oxyfluorfen; Pendimethalin; Propaquizafop. |
| Tipo: Circular Técnica (INFOTECA-E) |
Palavras-chave: Plantas daninhas: conceito; Características; Impacto; Classificação; Disseminação; Competição; Prevenção; Controle; Amônio glufosinato; Cynazine; Msma.; Erradicação; Manejo; Paraquat; Reprodução.; Alachlor; Clethodim; Clomazone; Fluazifop; Diuron; Linuron; Oxyfluorfen; Propaquizafop; Pendimethalin; Norflurazon; Oxadiazon; Trifluralin.. |
| Ano: 2002 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/275893 |
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| Rondon, R.; Akcha, Farida; Alonso, P.; Menard, Dominique; Rouxel, Julien; Montagnani, Caroline; Mitta, Guillaume; Cosseau, C.; Grunau, C.. |
| The Pacific oyster Crassostrea gigas is the main oyster species produced in the world, and a key coastal economic resource in France. High mortalities affect Pacific oysters since 2008 in France and Europe. Their origins have been attributed to a combination of biotic and abiotic factors, underlining the importance of environment quality. The impact of water pollution has been pointed out and one of the pollutants, the genotoxic herbicide diuron, occurs at high concentrations all along the French coasts. Previous work has revealed that a parental exposure to diuron had a strong impact on hatching rates and offspring development even if spats were not exposed to diuron themselves. In this study, we explored for the first time the transcriptional changes... |
| Tipo: Text |
Palavras-chave: Mollusk; Oyster; Diuron; Transcriptomic; Ecotoxicology. |
| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00318/42938/42438.pdf |
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| Dupraz, Valentin; Coquille, Nathalie; Menard, Dominique; Sussarellu, Rossana; Haugarreau, Larissa; Stachowski-haberkorn, Sabine. |
| A wild strain of Chaetoceros calcitrans and wild and diuron-resistant strains of Tetraselmis suecica, were exposed to the PSII inhibitor herbicides diuron and irgarol, individually and in mixtures. The effects of three concentrations of diuron and irgarol and four binary mixtures were evaluated on doubling time, relative reactive oxygen species and lipid content by flow cytometry, and on photosynthetic efficiency by pulse amplitude modulated fluorescence. In both wild strains, significant effects were observed for each molecule at the highest concentration tested: at irgarol 0.5 μg L−1, C. calcitrans was shown to be more sensitive than T. suecica (+52% and +19% in doubling time, respectively), whereas at diuron 5 μg L−1, T. suecica was more affected... |
| Tipo: Text |
Palavras-chave: Microalgae; Herbicides; Antifouling; Irgarol; Diuron; Diuron resistance. |
| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00319/43047/42658.pdf |
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| Guerit, Isabelle; Bocquene, Gilles; James, Alice; Thybaud, E; Minier, C. |
| The aim of this study was to test field relevance of the prospective methodology for the assessment of environmental risk described in the EU technical guidance document (TGD) [European Commission 2003. Technical guidance document in support of Commission Directive 93/67/EEC on Risk assessment for new notified substances and Commission Regulation (EC) No 1488/94 on Risk assessment for existing substances and Commission Directive (EC) 98/8 on biocides, second ed. European Commission, Luxembourg, Part 1, 2 and 3, 760pp.]. To achieve this goal, an environmental risk assessment was performed according to the TGD for two major contaminants, atrazine and diuron, that are present in the Seine River estuary (France) and listed in the EU Water Framework Directive... |
| Tipo: Text |
Palavras-chave: Diuron; Atrazine; Estuaries; The Seine River; Technical guidance document; Chemical risk assessment. |
| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/2008/publication-4540.pdf |
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| Barranger, Audrey; Akcha, Farida; Rouxel, Julien; Brizard, Raphael; Maurouard, Elise; Pallud, Marie; Menard, Dominique; Tapie, N.; Budzinski, Helene; Burgeot, Thierry; Benabdelmouna, Abdellah. |
| Pesticides represent a major proportion of the chemical pollutants detected in French coastal waters and hence a significant environmental risk with regards to marine organisms. Commercially-raised bivalves are particularly exposed to pollutants, among them pesticides, as shellfish farming zones are subject to considerable pressure from agricultural activities on the mainland. The aims of this study were to determine (1) the genotoxic effects of diuron exposure on oyster genitors and (2) the possible transmission of damaged DNA to offspring and its repercussions on oyster fitness. To investigate these points, oysters were exposed to concentrations of diuron close to those detected in the Marennes-Oleron Basin (two 7-day exposure pulses at 0.4 and 0.6 μg... |
| Tipo: Text |
Palavras-chave: Herbicide; Diuron; Oyster; Genotoxicity; Comet assay; Cytogenetics. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00162/27311/25541.pdf |
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| Dupraz, Valentin; Stachowski-haberkorn, Sabine; Menard, Dominique; Limon, Gwendolina; Akcha, Farida; Budzinski, Helene; Cedergreen, Nina. |
| The toxicity of the antifouling compounds diuron, irgarol, zinc pyrithione (ZnPT), copper pyrithione (CuPT) and copper was tested on the three marine microalgae Tisochrysis lutea, Skeletonema marinoi and Tetraselmis suecica. Toxicity tests based on the inhibition of growth rate after 96-h exposure were run using microplates. Chemical analyses were performed to validate the exposure concentrations and the stability of the compounds under test conditions. Single chemicals exhibited varying toxicity depending on the species, irgarol being the most toxic chemical and Cu the least toxic. Selected binary mixtures were tested and the resulting interactions were analyzed using two distinct concentration-response surface models: one using the concentration addition... |
| Tipo: Text |
Palavras-chave: Diuron; Irgarol; Pyrithione; Copper; Microbial ecotoxicology; Mixture model. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00445/55695/57362.pdf |
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| Barranger, Audrey; Benabdelmouna, Abdellah; Degremont, Lionel; Burgeot, Thierry; Akcha, Farida. |
| Changes in normal chromosome numbers (i.e. aneuploidy) due to abnormal chromosome segregation may arise either spontaneously or as a result of chemical/radiation exposure, particularly during cell division. Coastal ecosystems are continuously subjected to various contaminants originating from urban, industrial and agricultural activities. Genotoxicity is common to several families of major environmental pollutants, including pesticides, which therefore represent a potential important environmental hazard for marine organisms. A previous study demonstrated the vertical transmission of DNA damage by subjecting oyster genitors to short-term exposure to the herbicide diuron at environmental concentrations during gametogenesis. In this paper, Fluorescent in... |
| Tipo: Text |
Palavras-chave: Aneuploidy; FISH; Diuron; Crassostrea gigas. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00238/34911/33216.pdf |
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| Akcha, Farida; Spagnol, Charlene; Rouxel, Julien. |
| We investigated the effects of genotoxicant exposure in gametes and embryos to find a possible link between genotoxicity and reproduction/developmental impairment, and explore the impact of chemical genotoxicity on population dynamics. Our study focused on the genotoxic effects of two herbicides on oyster gametes and embryos: glyphosate (both as an active substance and in the Roundup formulation) and diuron. France is Europe's leading consumer of agrochemical substances and as such, contamination of France's coastal waters by pesticides is a major concern. Glyphosate and diuron are among the most frequently detected herbicides in oyster production areas; as oyster is a specie with external reproduction, its gametes and embryos are in direct contact with... |
| Tipo: Text |
Palavras-chave: Genotoxicity; Embryotoxicity; Oyster; Gametes; Pesticides; Diuron; Glyphosate. |
| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00070/18128/15783.pdf |
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| Stachowski-haberkorn, Sabine; Jerome, Marc; Rouxel, Julien; Khelifi, Celia; Rince, Maeva; Burgeot, Thierry. |
| To investigate the ability of microalgae to develop stable, long-term resistance to herbicides, the marine microalga Tetraselmis suecica was exposed to the herbicide diuron (5 µg/L) for a 43-generation exposure period followed by a 12-generation depuration phase. During the first 25 generations, diuron-exposed cultures showed doubling times ranging from 1.95 to 2.6 days, which was 2 to 2.5-fold longer than control cultures. Between generations 25 and 38, during diuron exposure, two out of the three exposed cultures exhibited a spontaneous drop in doubling time. These results provided evidence of culture adaptation to diuron. To assess persistence of the diuron adaptation observed on growth performance, one of the adapted cultures (D3) was maintained for 12... |
| Tipo: Text |
Palavras-chave: Microalgae; Diuron; Multigenerational; Adaptation; Flow cytometry. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00146/25718/23796.pdf |
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| Legrand, Helene; Herlory, Olivier; Guarini, Jean-marc; Blanchard, Gerard; Richard, Pierre. |
| Atrazine and diuron are two herbicides present in sediments of the intertidal mudflats in the Pertuis Charentais (Atlantic coast, France). They may negatively affect photosynthesis processes in microphytobenthos, the most productive primary producer in these environments. The impact of these herbicides on benthic diatoms was investigated using PAM fluorimetry on natural microalgal communities, once extracted from sediment, by following the variations of the effective quantum yield of PSII (Phi(PSII)) during exposure to atrazine and diuron concentrations in a range 0.1 mu g L-1 (.) 10 mg L-1. No significant effect was noticed for 0.1 mu g L-1 concentrations, but progressive reduction in photosynthetic efficiency, always occurring within 15 min, was... |
| Tipo: Text |
Palavras-chave: Diuron; Atrazine; PAM; Chlorophyll fluorescence; Microphytobenthos. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-3614.pdf |
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| Amim,Reynaldo Tancredo; Freitas,Silvério de Paiva; Freitas,Ismael Lourenço de Jesus; Scarso,Murilo Francischinelli. |
| Resumo: O objetivo deste trabalho foi avaliar o efeito dos herbicidas pré-emergentes indaziflam, indaziflam+metribuzim e diuron+hexazinone sobre o banco de sementes do solo de lavoura de cana-de-açúcar, durante quatro safras consecutivas. Utilizou-se o delineamento experimental de blocos ao acaso, com quatro repetições, em parcelas subdivididas. Os tratamentos consistiram de doses dos seguintes herbicidas: indaziflam, 75, 100 e 150 g i.a. ha-1; indaziflam+metribuzim, 75 + 960 g i.a. ha-1; e diuron+hexazinone, 936 + 264 g i.a. ha-1; além de área capinada, como testemunha. O banco de sementes foi analisado nas camadas do solo de 0,00-0,10 e 0,10‒0,20 m. Realizaram-se a contagem e a identificação de plântulas emergidas, e calcularam-se a densidade, a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Saccharum; Diuron; Hexazinone; Indaziflam; Metribuzim; Plantas daninhas. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2016001001710 |
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| Moreira,M.S.; Melo,M.S.C.; Carvalho,S.J.P.; Nicolai,M.; Crhistoffoleti,P.J.. |
| Após sucessivos anos, aplicações do herbicida glyphosate em pomares de citros no Estado de São Paulo selecionaram biótipos resistentes de Conyza bonariensis e C. canadensis. Na ocorrência de plantas daninhas resistentes em uma área agrícola, tornam-se necessárias mudanças nas práticas de manejo para obtenção de adequado controle das populações resistentes, bem como para a redução da pressão de seleção sobre outras espécies. Assim, este trabalho foi realizado com o objetivo de identificar herbicidas alternativos para controle de biótipos de Conyza spp. resistentes ao herbicida glyphosate, com aplicações em diferentes estádios fenológicos da planta daninha. Três experimentos foram conduzidos em campo, em pomares de citros em formação, sobre plantas de buva... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Buva; Resistência; EPSPS; Diuron; Atrazina; Amônio-glufosinato. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582010000100020 |
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| Araldi,R; Girotto,M; Velini,E.D; Tropaldi,L; Silva,I.P.F; Carbonari,C.A. |
| A análise da fluorescência da clorofila vem sendo largamente utilizada no entendimento dos mecanismos da fotossíntese propriamente dito, bem como na avaliação da capacidade fotossintética alterada com a aplicação de herbicidas. O consumo de água pelas plantas é uma maneira também de avaliar a atuação dos herbicidas nas plantas daninhas. O objetivo deste trabalho foi avaliar a fluorescência através da taxa de transporte de elétrons, consumo de água e fitointoxicação de Brachiaria decumbens após aplicação de quatro herbicidas de diferentes mecanismos de ação. Aos 30 dias após a semeadura de B. decumbens, as plantas foram arrancadas dos tubetes e preparadas para os tratamentos. Elas tiveram o sistema radicular colocado em tubos falcon preenchidos com água, e... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fluorômetro; Glyphosate; Haloxyfop-methyl; Diuron; Amicarbazone. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582011000500012 |
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| LUCIO,F.R.; BARROSO,A.A.M.; TOLEDO,R.E.B.; PITELLI,R.A.; VICTORIA FILHO,R.. |
| ABSTRACT: Weed interference reduces the productive potential of crops. Among the control methods used, chemical ones occupy a major position. The repeated application of the same mechanism of action selects tolerant plants. Among the species that affect sugarcane, crabgrass is one of them. This study has aimed to know the tolerance of different populations of this species to herbicides inhibiting photosystem II. Three populations were collected, identified and submitted to the application of ametryn and diuron herbicides in ten different doses, and the experiment was conducted in a experimental design of complete randomized blocks with four repetitions in a factorial arrangement of 10 x 3 (10 doses x 3 populations), being one trial for each herbicide.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Digitaria horizontalis; Ametryn; Diuron; Tolerance; Resistance. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100242 |
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| Registros recuperados: 35 | |
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