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Acetylcholinesterase enzyme activity in carp brain and muscle after acute exposure to diafuran Scientia Agricola
Golombieski,Jaqueline Ineu; Marchesan,Enio; Camargo,Edinalvo Rabaioli; Salbego,Joseânia; Baumart,Joele Schmitt; Loro,Vania Lucia; Machado,Sérgio Luiz de Oliveira; Zanella,Renato; Baldisserotto,Bernardo.
Sublethal adverse effects may result from exposure of aquatic organisms to insecticides at environmentally relevant concentrations. Fingerlings of the common carp (Cyprinus carpio, Linnaeus, 1758), grass carp (Ctenopharyngodon idella, Valenciennes, 1844), and bighead carp (Aristichthys nobilis, Richardson, 1845) were exposed to diafuran, an insecticide widely used during rice cultivation in Southern Brazil. The aim of this study was to verify the relationship between the lethal concentration (LC50) of diafuran and the acetylcholinesterase (AChE) activity in brain and muscle tissues of these species as a possible early biomarker of exposure to this insecticide. LC50 was determined for fish exposed to diafuran concentrations during 96 h (short term): common...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cyprinus carpio; Ctenopharyngodon idella; Aristichthys nobilis; Pesticide; Lethal concentration.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000400003
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ACHA: Avaliação da Contaminação hídrica por agrotóxico. Infoteca-e
SCORZA JUNIOR, R. P.; NÉVOLA, F. A.; AYELO, V. S..
Modelos matemáticos e simuladores têm sido desenvolvidos para prever a lixiviação de agrotóxicos em solos, permitindo grande economia de tempo e recursos financeiros, além de permitir análises de risco com maior representatividade e confiabilidade. O Brasil ainda não faz uso dessas ferramentas no processo de avaliação de risco e classificação ambiental dos agrotóxicos. Estas ferramentas não são utilizadas pelas autoridades nacionais por não estarem adaptadas às condições brasileiras. O presente trabalho teve como objetivo desenvolver uma ferramenta computacional para simulação da lixiviação de agrotóxicos em cenários agrícolas brasileiros. A ferramenta computacional recebeu o nome de ACHA, que se refere ao acrônimo de Avaliação da Contaminação Hídrica por...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) Palavras-chave: Modelagem matemática; Pesticide; Mathematical modeling.; Agrotóxico; Lixiviação.; Leaching..
Ano: 2010 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/880316
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AGGREGATION ISSUES IN PEST CONTROL ECONOMICS: A BIOECONOMIC APPROACH AgEcon
Young, Douglas L.; Smith, Elwin G.; Kwon, Tae-Jin.
Previous research has defined “aggregate pesticide expenditures” as the control variable; however, virtually all managerial recommendations and environmental restrictions target specific pesticides, rates, and crops. A bioeconomic approach considering particular pesticides on specific pests and crops is recommended for managerial-policy applications and testing for increasing returns. Exponential weed control and seven popular yield damage functional forms were estimated for a bioeconomic weed control model for winter wheat in Washington. Concavity with respect to herbicide rate was observed for most popular damage functions at normal weed densities and manufacturers’ label rates, but convexity existed outside these ranges and should be checked.
Tipo: Conference Paper or Presentation Palavras-chave: Bioeconomic; Data aggregation; Herbicide; Increasing returns; Pest control; Pesticide; Weed; Crop Production/Industries.
Ano: 2000 URL: http://purl.umn.edu/36448
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AN ANALYSIS OF THE IMPACT OF A BAN OF METHYL BROMIDE ON THE U.S. WINTER FRESH VEGETABLE MARKET AgEcon
Deepak, M.S.; Spreen, Thomas H.; VanSickle, John J..
This study evaluates the economic impact of a ban on methyl bromide on the U.S. winter fresh vegetable market for six major crops: tomatoes, green peppers, cucumbers, squash, eggplant, and watermelons. Florida is the primary domestic supplier of these products. Mexico and Texas are the competing suppliers of the five vegetable crops and peppers, respectively. Leontief technologies represent both monocrop and double-crop production systems; linear inverse demand functions represent four demand regions in the U.S. and Canada. By increasing production costs and reducing yields, a ban on methyl bromide decreases Florida's FOB revenues by 54% and increases those of Mexico by 65%. Price increases to U.S. fresh vegetable consumers range from near zero to over...
Tipo: Journal Article Palavras-chave: Fresh vegetables; Methyl bromide; Pesticide; Quadratic programming; Spatial equilibrium; Crop Production/Industries.
Ano: 1996 URL: http://purl.umn.edu/15113
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An in situ intercomparison exercise on passive samplers for monitoring metals, polycyclic aromatic hydrocarbons and pesticides in surface waters ArchiMer
Miege, C.; Mazzella, N.; Schiavone, S.; Dabrin, A.; Berho, C.; Ghestem, J. -p.; Gonzalez, C.; Gonzalez, Jean-louis; Lalere, B.; Lardy-fontan, S.; Lepot, B.; Munaron, Dominique; Tixier, Celine; Togola, A.; Coquery, M..
Tipo: Text Palavras-chave: Intercomparison exercise; Marine Strategy Framework Directive (MSFD); Metal; Passive sampling; Pesticide; Polar organic chemical integrative sampler (POCIS); Polycyclic aromatic hydrocarbon (PAH); Priority chemical; Surface water; Water Framework Directive (WFD).
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00077/18853/16597.pdf
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Artrópodos associados ao tomateiro industrial em Petrolina, PE e a racionalização do uso de defensivos agrícolas. Infoteca-e
MORAES, G. J. de; RAMALHO, F. de S.; OLIVEIRA, C. A. V. de; FREIRE, L. C..
As principais pragas do tomateiro industrial na regiao de Petrolina, PE, sao o microacaro (Aculops Lycopersici (Massee), o acaro vermelho (Tetranychus evansi Baker & Pritchard) e as brocas dos frutos (PSeudoplusia oo (Cramer) e Heliothis zea (Bod). Os niveis populacionais mais baixos do microacaro foram atingidos quando o transplantio foi realizado de outubro a abril, enquanto que os niveis mais baixos de populacao de acaro vermelho foram atingidos em geral nos transplantios realizados no perimetro semestre de cada ano. Uma apreciavel reducao nos gastos relativos ao controle de pragas nesta cultura foi conseguida quando a aplicacao de defensivos baseou-se nos limiares de dano economico de duas plantas severamente atacadas pelo microacaro ou acaro...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) Palavras-chave: Tomate industrial; Artrópodo; Defensivo agrícola; Brasil; Pesticide; Tomato.; Tomate; Ácaro; Lycopersicon Esculentum.; Mites..
Ano: 1986 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/132630
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Assessment of the abatement of pesticide mutagenesis in situ by a corn/soybean integrated pest management programme. Repositório Alice
RODRIGUES, G. S..
The genotoxicity induced by pesticides applied in an IPM program were evaluated with four plant bioassays. Three pesticide application rates were prescribed as follows: (a) Low - no field pesticide spray; (b) Medium - IPM test rate: banded cyanazine plus metolachlor (2.7 kg a.i. and 2.3 L a.i./ha of herbicides, respectively; and (c) High - preventative pesticide application program: broadcast cyanazine plus metolachlor (same application rates as above) plus chlorpyrifos (1 kg a.i./ha of insecticide). The Tradescantia micronucleus assay was employed for the assessment of (a) the formulated compounds, singly and combinations; (b) pesticide residues extracted from soils sampled before and after application, and (c) in situ exposures (14-hr exposure to...
Tipo: Teses Palavras-chave: Abatement; Pesticide; Mutagenesis.
Ano: 1995 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/12607
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Bioensaios de toxicidade genética com plantas superiores Tradescantia (MCN e SHM), milho e soja. Infoteca-e
RODRIGUES, G. S..
A avaliação da toxicidade genética presente em certas situações ambientais e de compostos selecionados é uma área de crescente interesse em ecotoxicologia. Neste trabalho, são descritos quatro bioensaios vegetais de interesse para avaliação de genotoxicidade in situ em ambientes agrícolas. O ensaio do micronúcleo em célula mãe do pólen de Tradescantia (Trad-MCN) é um teste de clastogênese extremamente sensível, de exposição curta (desde apenas 6 horas) e avaliação simples. O ensaio do pelo estaminal (Trad-SHM) B um teste de mutação pontual, no qual se observa alteração de cor nas células do estame. A avaliação é simples, mas laboriosa. O bioensaio do pólen ceroso em milho tem como principal vantagem a sua potência estatística, já que, literalmente,...
Tipo: Folhetos Palavras-chave: Toxicidade; Ecotoxicologia; Bioensaio; Monitoramento ambiental; Pesticide; Soybean; Agrotóxico; Milho; Soja; Mutação; Toxidez; Genética; Environmental impact; Mutagenesis; Tradescantia; Corn; Bioassays.
Ano: 1999 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/964416
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BIOLOGICAL ACTIVITIES AND NOVEL APPLICATIONS OF CHALCONES Planta Daninha
DÍAZ-TIELAS,C.; GRAÑA,E.; REIGOSA,M.J.; SÁNCHEZ-MOREIRAS,A.M..
ABSTRACT This review provides information on the biological activities of chalcones (whether natural or synthetic derivatives) on different organisms, as well as an overview of the functions and possible new applications of these plant secondary metabolites on crop protection, as eco-friendly pesticides and weed control agents. Naturally occurring chalcones have been used in traditional medicine for many years; however, recent scientific advances have shown that these molecules have a broad range of biological activities in a variety of organisms. A review on the major sources of chalcones and the main molecular events involved in the modes of action of these natural products is achieved. Chalcones are molecules with a broad spectrum of biological...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Mode of action; Secondary metabolites; Crop protection; Pesticide; Fungicide; Antiviral; Phytotoxicity.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000300607
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Biotechnology and crop protection in Brazil. Repositório Alice
CAMPANHOLA, C.; RODRIGUES, G. S.; BETTIOL, W..
Tipo: Parte de livro Palavras-chave: Productivity; Pesticide; Insect pest; Plant pathogen; Genetic control; Soybean; Tomato; Rubber tree; Coconut; Apple; Strawberry; Cana-de-açúcar; Agrotóxico; Alfafa; Agricultura; Arroz; Banana; Coco; Controle Biológico; Controle Genético; Erva Daninha; Fumo; Maçã; Morango; Praga de Planta; Produtividade; Seringueira; Soja; Alfalfa; Agriculture; Biological control; Rice; Sugarcane; Tobacco; Weed control.
Ano: 1998 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/13013
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Characterization of pesticede resistance in horn fly populations as a risk for fixation fo restance alles in cattle tick population. Repositório Alice
BRITO, L. G.; OLIVEIRA, M. C. de S.; FOIL, L. D.; GUERRERO, F. D.; LEON, A. P. de; BARBIERI, F. da S.; CHAGAS, A. C. de S.; BARROS, A. T. M. de.
Tipo: Separatas Palavras-chave: Tick resistance; Pesticide; Cattle.
Ano: 2012 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/940323
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Climate conditions associated with the occurrence of pyrethroid residues in bulk milk tank Arq. Bras. Med. Vet. Zootec.
Picinin,L.C.A.; Toaldo,I.M.; Hoff,R.B.; Souza,F.N.; Leite,M.O.; Fonseca,L.M.; Diniz,S.A.; Silva,M.X.; Haddad,J.P.A.; Cerqueira,M.M.O.P.; Luiz,M.T.B..
ABSTRACT The present study attempted to identify climate conditions that are associated with the occurrence of pyrethroid residues using a multivariate principal component analysis (PCA). A total of 132 raw milk samples were collected from dairy farms in Minas Gerais State - Brazil and analyzed for seven analytes using gas chromatography with electron capture detection. Of the 132 milk samples, pyrethroid residues were identified in 14 (10.6%) milk samples, of which 12 (9.1%) and two (1.5%) milk samples had the identification of cypermethrin and deltamethrin, respectively. From those samples, nine (6.8%) milk samples were regarded as non-compliant for cypermethrin with this analyte concentration above the maximum residue limits set by Brazilian...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Veterinary drug; Pesticide; Raw milk; Seasonality; Dairy cow.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352016000601721
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Comparative Analysis of the Safe Training Performance about Farmers Use Pesticide -Sichuan Province of China as an example AgEcon
Wenting, Song; Xinhong, Fu; Deping, Xiong; Yan, Wang; Lian, Huang.
The Ministry of Agriculture of People’s Republic of China put in practice in non-hazardous food production and high-toxicity pesticides elimination, which aim at human, food and environmental safety. To investigate 491 farmers in Sichuan Province, the paper analyzes comparatively training content, fixed-point samples, different areas and training influence. The training content focuses on pesticide purchase, label reading, personal protection, container disposal, sprayer maintenance and sprayer cleaning. The results of SPSS statistical software show that there is a significant difference in 30 fixed-point samples between before and after training, and each index has obvious performance. And the results of component score and comprehensive scores of...
Tipo: Conference Paper or Presentation Palavras-chave: Training performance; Farmers; Pesticide; Agricultural and Food Policy; Community/Rural/Urban Development; Environmental Economics and Policy; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; Institutional and Behavioral Economics; Q16.
Ano: 2009 URL: http://purl.umn.edu/49973
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Concentración de Diclorodifeniltricloroetano (DDT) en poblaciones silvestres de Cocodrilos (Crocodylus acutus y C. Moreletti) en la zona Costera de México Colegio de Postgraduados
Loa Loza, Eleazar.
Para determinar la concentración de DDT y sus metabolitos en ejemplares de cocodrilos (Crocodylus acutus y C. moreletii), durante el período de junio a diciembre de 2004 se tomaron 80 muestras de sangre en 37 localidades de 13 estados de la zona costera de México. En algunos de estos sitios, ha sido aplicado el DDT para el control del vector del paludismo. Las muestras fueron procesadas en el laboratorio mediante cromatografía de gases con detector de captura de electrones. Se realizó un análisis de regresión lineal simple entre la longitud y el peso de los cocodrilos. Para comparar las concentraciones de DDT en sangre en función de la longitud y peso de los cocodrilos en las provincias biogeográficas, se realizó el análisis de varianza utilizando un...
Tipo: Tesis Palavras-chave: Reptiles; Crocodylus acutus; C. moreletii; DDT; Pesticidas; Contaminación; Maestría; Ganadería; Reptiles; Pesticide; Pollution.
Ano: 2007 URL: http://hdl.handle.net/10521/1565
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Cytogenotoxicity of rice crop water after application of the tricyclazole fungicide Anais da ABC (AABC)
WANDSCHEER,ALANA C.D.; MARCHESAN,ENIO; TEDESCO,SOLANGE B.; FRESCURA,VIVIANE DAL-SOUTO; SOARES,CAMILLE F.; LONDERO,GUILHERME P.; TELÓ,GUSTAVO M.; HANSEL,DÂMARIS S.S..
ABSTRACT Tricyclazole is currently one of the fungicides recommended for the treatment of diseases in irrigated rice. However, there is relatively little information on its cytotoxic and genotoxic potential. The objective of this study was to evaluate the cytotoxicity and genotoxicity of rice crop water after apllication of the tricyclazole fungicide through the Allium cepa L. test. The rice crop water samplings were collected before and 1, 15 and 30 days after application of the fungicide in rice plant shoots. The Allium cepa roots were placed in contact with the rice crop water to check for possible chromosomal abnormalities and mitotic index of the bioindicators meristematic cells. The data obtained by the Allium cepa test indicates that the application...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bioindicator; Chromosomal abnormalities; Mitotic index; Pesticide; Irrigated rice.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000301251
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Desenvolvimento de modelos de regressão como contribuição para a análise de risco de resíduos de pesticidas em maçã. Repositório Alice
HIRSH, I. D.; TERNES, S.; BONNET, M.; FEIJÓ, L..
O Plano Nacional de Controle de Resíduos e Contaminantes (PNCRC) do Ministério da Agricultura Pecuária e Abastecimento (MAPA) é um programa federal de fiscalização de alimentos que visa quantificar resíduos químicos potencialmente nocivos à saúde do consumidor. Os dados coletados pelo PNCRC provêm de uma amostragem homogênea e aleatória, em âmbito nacional, de diversos produtos de origem vegetal e animal, seguida de análises em laboratórios oficiais e credenciados pelo MAPA. Este trabalho objetiva o tratamento dos dados gerados pelo PNCRC, coletados no período de 2008 a 2011, relativos à análise de risco de resíduos de pesticidas em maçã, visando evidenciar correlações espaço-temporais relevantes quanto à concentração de diferentes resíduos químicos.
Tipo: Anais e Proceedings de eventos Palavras-chave: Modelos de regressão; Pesticide; Análise de risco; Pesticida; Maçã; Risk analysis; Apples.
Ano: 2014 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/996264
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Developing realistic exposure scenarios for environmental risk rssessment of pesticides in Brazil: surface water Repositório Alice
MINGOTI, R.; SPADOTTO, C. A.; BRASCO, M. A.; VALLE, L. B.; BERALDO, G. N.; FARIAS, A. R.; LOVISI FILHO, E..
Standard scenarios increase the consistency of the regulatory evaluation process by minimizing the subjective influence when performing the pesticide environmental concentration - PEC calculation, also make interpretation much easier, and enable the adoption of a consistent scientific process for a Tier 1 evaluation (FOCUS, 2000). The Brazilian Institute of the Environment and Renewable Natural Resources (IBAMA) adopts the United States Environmental Protection Agency (USEPA) methodology (IBAMA, 2016), using the ?standard farm pond? scenario (Parker et al., 1995) for surface water in the Tier 1 evaluation, and, therefore, it may lead to the registration of pesticides without considering Brazilian agricultural scenarios in environmental risk assessment - ERA.
Tipo: Anais e Proceedings de eventos Palavras-chave: Pesticide; Registration of pesticides; Environmental risk.; Surface water..
Ano: 2017 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1076506
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Dichlorvos (DDVP) residue removal from tomato by washing with tap and ozone water, a commercial detergent solution and ultrasonic cleaner Ciênc. Tecnol. Aliment.
HESHMATI,Ali; NAZEMI,Fatemeh.
Abstract Dichlorvos (DDVP) is one of the most consumption chlorinated organophosphate insecticide used on tomato. The knowledge about the influence of postharvest household processes on the levels of DDVP residues in vegetables is required to estimate dietary exposure. In this study, the removal of sprayed dichlorvos (DDVP) on tomato by washing with tap, ozonated water (in dosages of 2, 4 and 6 mg ozone/L), a commercial detergent solution (in concentration of 1, 2 and 3%) and ultrasonic cleaner (with power of 100, 200 and 300 W) was investigated. DDVP residue was determined by gas chromatography with electron capture detector. Washing processes led to the significant reduction of DDVP. The gradual increase in the percentage of the removal was observed due...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Dichlorvos; Pesticide; Ozone; Ultrasonic; Tomato.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612018000300441
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Dimethoate degradation in plants and during processing of yerba maté leaves BABT
Schmalko,Miguel E.; Ramallo,Laura A.; Ferreira,Darío; Berlingheri,Rubén D..
The objective of this research was to study degradation kinetics of dimethoate in plants of Ilex paraguariensis Saint Hilaire (or yerba maté) and during its processing. To determine dimethoate concentration, a capillary gas chromatography technique with a mass selective detector was used. Half-life times in plants ranked between 9.8 and 11.8 days. During processing, with a blanching and two drying steps, dimethoate concentration decayed to a 22.7% of its initial value (in dry basis); while during seasoning step (at 45°C), half-life time was 17.3 days. With these values, preharvest safety interval was determined.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Dimethoate; Pesticide; Degradation; Processing; Ilex paraguariensis; Yerba maté.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132002000600003
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Effects of an environmentally relevant concentration of diuron on oyster genitors during gametogenesis: responses of early molecular and cellular markers and physiological impacts ArchiMer
Akcha, Farida; Barranger, Audrey; Bachere, Evelyne; Berthelin, C. Heude; Piquemal, D.; Alonso, P.; Sallan, R. Rondon; Dimastrogiovanni, G.; Porte, C.; Menard, Dominique; Szczybelski, A.; Benabdelmouna, Abdellah; Auffret, M.; Rouxel, Julien; Burgeot, Thierry.
Genitors of the Pacific oyster Crassostrea gigas were submitted during gametogenesis to a short pulse exposure to the herbicide diuron at a realistic environmental concentration. Histological analysis showed no effect of diuron on gametogenesis course, sex ratio and reproductive effort. A non-significant increase in testosterone and progesterone levels was observed in genitors exposed to the herbicide. At cell level, diuron exposure was shown to modulate the phagocytic activity of circulating hemocytes. The results of a transcriptional analysis showed that diuron affected the expression of genes belonging to functions known to play a major role during oyster gametogenesis such as gene transcription regulation, DNA replication and repair, DNA methylation...
Tipo: Text Palavras-chave: Oyster; Pesticide; Reproduction; Histology; Gene expression; RT-qPCR; Steroid; Immunity.
Ano: 2016 URL: https://archimer.ifremer.fr/doc/00309/41983/83232.pdf
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