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Advanced Methods for Dose-Response Assessment: Bayesian Approaches - Final Report AgEcon
Wilson, James D..
Resources for the Future (RFF), in conjunction with the U.S. Environmental Protection Agency, the Society for Risk Analysis, and the Electric Power Research Institute, held a workshop Sept. 18-20, 2000, at the RFF Conference Center in Washington, DC. The intent was to discuss how Bayesian approaches could be useful in improving techniques for estimating exposure-response functions. Ten distinguished scholars from a range of fields (medical biostatistics, decision sciences, environmental engineering, and toxicology) served as faculty. Approximately 80 people attended the workshop. Bayesian methods have been applied to a variety of problems in biomedical research and environmental risk analysis, including design of clinical trials, estimation of exposures to...
Tipo: Working or Discussion Paper Palavras-chave: Bayesian analysis; Dose-response; Regulation; Risk assessment; Arsenic; Risk and Uncertainty.
Ano: 2001 URL: http://purl.umn.edu/10754
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Control of glyphosate resistant hairy fleabane (Conyza bonariensis) with dicamba and 2,4-D Planta Daninha
Soares,D.J.; Oliveira,W.S.; López-Ovejero,R.F.; Christoffoleti,P.J.
Auxyn type herbicides such as dicamba and 2,4-D are alternative herbicides that can be used to control glyphosate-resistant hairy fleabane. With the forthcoming possibility of releasing dicamba-resistant and 2,4-D-resistant crops, use of these growth regulator herbicides will likely be an alternative that can be applied to the control of glyphosate resistant hairy fleabane (Conyza bonariensis). The objective of this research was to model the efficacy, through dose-response curves, of glyphosate, 2,4-D, isolated dicamba and glyphosatedicamba combinations to control a brazilian hairy fleabane population resistant to glyphosate. The greenhouse dose-response studies were conducted as a completely randomized experimental design, and the rates used for dose...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Conyza bonariensis; Dose-response; Glyphosate-resistant hairy fleabane; Weed resistance.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582012000200020
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DETECTION OF GLYPHOSATE-RESISTANT PALMER AMARANTH (Amaranthus palmeri) IN AGRICULTURAL AREAS OF MATO GROSSO, BRAZIL Planta Daninha
CARVALHO,S. J. P.; GONÇALVES NETTO,A.; NICOLAI,M.; CAVENAGHI,A. L.; LÓPEZ-OVEJERO,R. F.; CHRISTOFFOLETI,P. J..
ABSTRACT The recent introduction of Palmer amaranth (Amaranthus palmeri) in Brazilian agricultural areas may promote several changes on weed management, especially in no-till systems and in glyphosate-resistant crops, since glyphosate-resistant biotypes of A. palmerihave been frequently selected in other countries. Therefore, this research was developed in order to evaluate the glyphosate susceptibility of a Palmer amaranth biotype recently identified in the State of Mato Grosso, Brazil. For this purpose, glyphosate susceptibility of three Amaranthusbiotypes was compared: A.hybridus var. patulus, collected in the State of Rio Grande do Sul - Brazil; A.hybridus var. patulus, collected in the State of São Paulo - Brazil; and A.palmeri, collected in the State...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Pigweeds; Susceptibility; Dose-response; Management; Control.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000300579
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Diet formulation techniques and lysine requirements of 1- to 22-day-old broilers Rev. Bras. Ciênc. Avic.
Siqueira,JC; Sakomura,NK; Dourado,LRB; Ezequiel,JMB; Barbosa,NAA; Fernandes,JBK.
Two experiments were carried out to compare two techniques (amino acid supplementation and dilution) for formulating experimental diets for pre-starter (1 to 8 days) and starter (8 to 22 days) broiler chicks and to estimate digestible lysine requirements using the dose-response method. In each experiment, 1,200 male Cobb 500 chickens were randomly distributed according to a 5x2 factorial arrangement (lysine level x formulation technique) with six replicates of 20 birds each. For the supplemented diet, a basal diet was formulated to meet the nutritional requirements, then L-lysine HCl was added to achieve digestible lysine levels of 0.975, 1.082, 1.189, 1.296 and 1.403% in the pre-starter diets and 0.840, 0.932, 1.024, 1.116 and 1.208% in the starter diets....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Broilers; Diet formulation; Dose-response; Lysine; Performance.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2013000200008
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Evolution of Natural Resistance to Glyphosate in Morning Glory Populations Planta Daninha
PAZUCH,D.; TREZZI,M.M.; GUIMARÃES,A.C.D.; BARANCELLI,M.V.J.; PASINI,R.; VIDAL,R.A..
ABSTRACT Tolerance, also referred to as natural resistance, is a feature that exists in the plant even before herbicide application in an area. I. grandifolia, I. indivisa and I. purpurea are among the tolerant species most commonly found over fields in southern Brazil. We hypothesized that the intensive use of glyphosate results in increasing levels of tolerance to glyphosate, and in pronounced response variability in populations of the same Ipomoea species. This study aimed at identifying tolerance variations to glyphosate among I. grandifolia, I.indivisa and I. purpurea morning glory species and among populations of these species. In crops over Paraná and Santa Catarina states (Brazil) 31 biotypes were collected (20I. grandifolia, 7I.indivisa and 4I....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Tolerance; Ipomoea grandifolia; Ipomoea indivisa; Ipomoea purpurea; Control; Dose-response.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100205
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GOOSEGRASS RESISTANT TO GLYPHOSATE IN BRAZIL Planta Daninha
TAKANO,H.K.; OLIVEIRA JR.,R.S.; CONSTANTIN,J.; BRAZ,G.B.P.; GHENO,E.A..
ABSTRACT Several cases of herbicide resistance in goosegrass have been confirmed worldwide. Reports of control failures after glyphosate application have been observed, especially in the Midwest region of Paraná State. The objective of this study was to evaluate the existence of goosegrass populations resistant to glyphosate. For this, 25 populations collected in two consecutive seasons (2013/2014 and 2014/2015) were sown and grown in greenhouse. Glyphosate dose-response curve experiments were performed using doses of 0, 60, 120, 240, 480, 960, 1,920, 3,840, 7,680 and 15,360 g a.e. ha-1. The application stages were from two to three tillers (E1) for the populations of 2013/2014 and E1 and five to six tillers (E2) for the populations of 2014/2015....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Eleusine indica; Dose-response; Application timming; Resistance factor.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100217
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Herbicide efficacy on Borreria densiflora control in pre- and post-emergence conditions Planta Daninha
Martins,B.A.B.; Christoffoleti,P.J..
The weed Borreria densiflora is a management issue in soybean and sugarcane crops from North and Northeastern Brazil. Knowledge upon chemical control of B. densiflora contributes to the integrated management of this weed species, especially when active ingredient options become reduced due to the selection of herbicide resistant or tolerant weed species. Experiments in pre- and post-emergence of B. densiflora were conducted in greenhouse, in a randomized block design and four replications. In pre-emergence, the dose-response curve methodology was used and 7 herbicides were tested. In post-emergence, 9 herbicides at the recommended rate and 4 herbicide mixtures were tested. For pre and post-emergence conditions, evaluations were conducted at 60 and 21 days...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Vassourinha-de-botão; Chemical control; Dose-response; Herbicide mixtures; Integrated weed management.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582014000400017
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Herbicide resistant barnyardgrass in Iran and Turkey Planta Daninha
Haghnama,Kianoosh; Mennan,Husrev.
Abstract Background: Inconsistent control of Barnyardgrass has been reported repeatedly by farmers in major rice growing areas of Iran and Turkey. Objective: Thus, a greenhouse study was conducted to investigate the resistance of Barnyardgrass to acetyl CoA carboxylase (cyhalofop-butyl) and acetolactate synthase (penoxsulam, bispyribac-sodium) inhibiting herbicides. Methods: The seeds were sown in pots in a greenhouse and after screening, were sprayed with various rates of cyhalofop-butyl, penoxsulam and bispyribac-sodium herbicides at 3-4 leaf stage. Four weeks later, the above ground biomass was cut, dried in an oven and weighted. The results were then analyzed in the R software (drc package) using a four or three parameter log-logistic function....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Dose-response; Echinochloa crus-galli; Multiple-herbicide resistance; Rice.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100310
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Limited occurrence of resistant radish (Raphanus sativus) to AHAS-inhibiting herbicides in Argentina Planta Daninha
Pandolfo,C.E.; Presotto,A.; Poverene,M.; Cantamutto,M..
Radish has developed feral and weedy biotypes, which is a concern for agriculture around the world. In Argentina, it is one of the most widespread and troublesome crop weeds. In Brazil, this species has developed herbicide-resistance to acetohydroxyacid synthase (AHAS) inhibiting herbicides. The objective of this study was to record the presence of herbicide-resistant weedy radish plants in Argentina. In spring 2008, we found a small population of radish at the end of the flowering stage in an imidazolinone-tolerant canola field treated with imazethapyr. Screening and dose-response tests were conducted to two successive generations. They proved the biotype resistant status, and showed extensive survival (between 50 and 80% of control) to the application of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Herbicide-resistance; Imazethapyr; Metsulfuron; Dose-response.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582013000300017
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Lixiviação de glyphosate e imazapyr em solos com diferentes texturas e composição química. I. Método do bioensaio. Repositório Alice
SOUZA, A. P. de; FERREIRA, F.A.; SILVA, A. A. da; RUIZ, H.A.; PRATES, H.T..
A mobilidade dos herbicidas no perfil do solo e influenciado por varios processos, tais como, retencao, transformacao e transporte. O conhecimento destes fenomenos e fundamental para a perfeita compreensao do destino de tais produtos no ambiente. Dentre as varias tecnicas utilizadas nesses estudos, o metodo do bioensaio apresenta-se como de otima representatividade e reprodutibilidade. Em razao dessas caracteristicas, associadas a poucas informacoes sobre a mobilidade de herbicidas nos solos sob condicoes tropicais, foi conduzido um bioensaio objetivando verificar o movimento vertical do glyphosate e do imazapyr, em colunas de solos de diferentes texturas e composicao quimica, utilizando-se o tomaterio (Lycopersicon esculentum Mill var. Santa Clara) como...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Logistica; Herbicida; Dose-resposta; Logistic; Herbicide; Dose-response.
Ano: 2000 URL: http://www.alice.cnptia.embrapa.br/handle/doc/484690
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Lysine and arginine requirements of Salminus brasiliensis PAB
Dairiki,Jony Koji; Borghesi,Ricardo; Dias,Carlos Tadeu dos Santos; Cyrino,José Eurico Possebon.
The objective of this work was to determine the dietary lysine (DL) and dietary arginine (DA) requirements of dourado (Salminus brasiliensis), through dose-response trials using the amino acid profiles of whole carcasses as a reference. Two experiments were carried out in a completely randomized design (n=4). In the first experiment, groups of 12 feed-conditioned dourado juveniles (11.4±0.2 g) were stocked in 60 L cages placed in 300 L plastic indoor tanks in a closed circulation system. Fish were fed for 60 days on diets containing 1.0, 1.5, 2.0, 2.5, 3.0, or 3.5 % dietary lysine. In the second experiment, dourado juveniles (27.0±0.8 g) were fed for 60 days on semipurified diets containing arginine at 1.0, 1.5, 2.0, 2.5 or 3.0%, in similar conditions to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amino acid; Dose-response; Dourado; Regression.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2013000800032
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MULTIPLE RESISTANCE OF Amaranthus palmeri TO ALS AND EPSPS INHIBITING HERBICIDES IN THE STATE OF MATO GROSSO, BRAZIL Planta Daninha
NETTO,A. GONÇALVES; NICOLAI,M.; CARVALHO,S.J.P.; BORGATO,E.A.; CHRISTOFFOLETI,P.J..
ABSTRACT This work was carried out in order to evaluate the susceptibility to ALS-inhibiting herbicides of the Brazilian biotype of glyphosate-resistant A. palmeri, considering different chemical groups. For that, four experiments were performed, each with one of the following herbicides: glyphosate, chlorimuron-ethyl, cloransulan-methyl and imazethapyr. In each trial, treatments were organized according to a 2x8 factorial scheme, in which two were the species of Amaranthus (A. palmeri and A. spinosus) and eight were the herbicide rates (16D, 8D, 4D, 2D, D, 1/2D, 1/4D and herbicide absence; being D the commercial rate of each product). For glyphosate, D = 720 g a.e. ha-1; for chlorimuron-ethyl, D = 20 g ha-1; for cloransulanmethyl, D = 30 g ha-1; for...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Palmer amaranth; Dose-response; Management; Control.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000300581
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Multiple resistance of Conyza sumatrensis to three mechanisms of action of herbicides Agronomy
Albrecht, Alfredo Junior Paiola; Pereira, Vinicius Gabriel Caneppele; Souza, Cristian Natalino Zanfrilli de; Zobiole, Luiz Henrique Saes; Albrecht, Leandro Paiola; Adegas, Fernando Storniolo.
Fleabane (Conyza spp.) is an important weed in grain production systems and is currently one of the most problematic weeds in Brazil. An important factor related to weeds such as fleabane is the characteristic of herbicide-resistant biotypes developed under selection pressure, with multiple resistance previously detected for Conyza spp. Thus, the aim of this study was to demonstrate the multiple resistance of Conyza sumatrensis to the herbicides paraquat, glyphosate, and chlorimuron. From the F2 seeds of biotypes with suspected resistance to paraquat, glyphosate, and chlorimuron, dose-response greenhouse experiments were conducted for the three herbicides. Herbicides were applied when the plants had 6-8 leaves that were at a height of 8 cm. At the end of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Conyza spp.; Dose-response; Paraquat; Glyphosate; Chlorimuron. Conyza spp.; Dose-response; Paraquat; Glyphosate; Chlorimuron..
Ano: 2020 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42485
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Paraquat Resistance of Sumatran Fleabane (Conyza sumatrensis) Planta Daninha
ZOBIOLE,L.H.S.; PEREIRA,V.G.C.; ALBRECHT,A.J.P.; RUBIN,R.S.; ADEGAS,F.S.; ALBRECHT,L.P..
ABSTRACT: In Brazil, some populations of Conyza bonariensis and C. canadensis are glyphosate resistant and there are populations of C. sumatrensis (Sumatran fleabane) presenting multiple resistance to both glyphosate and chlorimuron. During the 2014/2015 and 2015/2016 seasons, growers reported failures to control Sumatran fleabane with paraquat. This study investigated the potential of paraquat resistant Sumatran fleabane populations in Paraná state, Brazil. Populations with suspected paraquat resistance were tested in the field in 2016 season. In 2017, seeds from these populations were collected, sown and grown in a greenhouse. Paraquat dose-response curve experiments were performed in Mogi Mirim, SP; Londrina, PR and Palotina, PR using doses of 0, 50,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Control; Dose-response; PSI inhibitor.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100218
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PREVENTABLE FOOD BORNE ILLNESS WITH DOSE-RESPONSE DAMAGES: OPTIMAL SHARING OF PREVENTION BETWEEN CONSUMERS AND PROCESSORS AND THE EFFECT OF PRODUCT LIABILITY AgEcon
Roe, Brian E..
As public concern for food safety burgeons concerned policy makers search for ways to manage the risk inherent to food consumption. Product liability laws may serve as efficient means to induce socially optimal levels of care or may efficiently complement regulation of potentially injurious activities. However, two characteristics common to many food borne illness cases are often not considered in the standard liability economics model that yields these prescriptions: dose-response damage functions and victim damage prevention. This paper explores how dose-response relationships common to the biology and epidemiology of food borne illness may effect the shape of resulting social welfare functions and privately chosen prevention efforts under different...
Tipo: Conference Paper or Presentation Palavras-chave: Food borne illness; Dose-response; Liability; Agricultural and Food Policy; Food Consumption/Nutrition/Food Safety.
Ano: 1999 URL: http://purl.umn.edu/21668
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Resistance of Raphanus raphanistrum to the herbicide metsulfuron-methyl Planta Daninha
Costa,L.O.; Rizzardi,M.A..
The ALS-inhibiting herbicides, especially metsulfuron-methyl, are widely used for weed control, mainly wheat and barley in southern Brazil. Raphanus raphanistrum is a major weed of winter crops. However, in recent years, R.raphanistrum, after being treated with metsulfuron, has shown no symptoms of toxicity, possibly due to herbicide resistance. Aiming to evaluate the existence of R.raphanistrum biotypes resistant to metsulfuron, an experiment was conducted in a greenhouse, in a completely randomized design with four replications. The plots consisted of pots with six plants. The treatments consisted of the interaction of resistant R. raphanistrum (biotype R) and susceptible R. raphanistrum (biotypes S) with ten doses of the herbicide (0.0; 0.6; 1.2; 2.4;...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Acetolactate synthase; Dose-response; Weed; Resistance factor.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582014000100020
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Resistence of Radish Biotypes to Iodosulfuron and Alternative Control Planta Daninha
CECHIN,J.; VARGAS,L.; AGOSTINETTO,D.; ZIMMER,V.; PERTILE,M.; GARCIA,J.R..
The repetitive use of iodosulfuron for the control of weeds in winter cereals in the south of Brazil has favored the emergence of resistant Raphanus sativus biotypes. The objective of this study was to evaluate: the response of Raphanus sativus biotypes susceptible and resistant to different dosages of iodosulfuron; the control of biotypes with alternative registered herbicides for the control of the species in crops of wheat, corn and soybean; and the existence of cross-resistance of the biotypes. Thus, four experiments were done in a greenhouse, with a completely randomized design and four replicates. The experimental units were composed of vases with a volumetric capacity of 0.75 L filled with substrate, containing a plant each. For the dose-response...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Raphanus sativus; Dose-response; Acetolactate synthase; Weed.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000100151
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Response of laying hens to methionine + cystine intake by dilution technique R. Bras. Zootec.
Bendezu,Hilda Cristina Palma; Sakomura,Nilva Kazue; Hauschild,Luciano; Silva,Edney Pereira da; Dorigam,Juliano Cesar de Paula; Malheiros,Euclides Braga; Fernandes,João Batista Kochenborger.
The objective of this study was to measure the response of Dekalb White laying hens to different intakes of digestible methionine + cystine (met+cys) to optimise their performance. Two hundred eighty-eight Dekalb White laying hens, ranging in age from 33 to 48 weeks, were used in the study. The birds were randomly allocated into eight treatment (levels of met+cys and the control treatment) groups with six replicates of six hens per unit. The experimental diets consisted of seven increasing levels of met+cys (1.37, 2.75, 4.14, 5.51, 6.89, 7.92 and 8.95 g kg−1) and were prepared using a dilution technique. A control treatment was used to confirm that the limiting response was due to met+cys intake. Egg production, feed intake, egg weight, egg mass and feed...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Broken Line; Dose-response; Models; Requirement; Statistic.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982015000100015
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Tolerance of eucalypt (Eucalyptus spp.) seedlings to imazapyr in nutritive solution Planta Daninha
Silva,C.M.M.; Ferreira,L.R.; Ferreira,F.A.; Miranda,G.V..
Imazapyr has presented excellent results in controlling coppices in stand reforms of eucalypt forests, despite differences in the efficacy levels. To find out whether these different responses are caused by the genetic variability of the cultivated materials, two experiments were carried out under greenhouse conditions with different imazapyr doses in a hydroponic system in plastic vases containing 2,500 mL solution. The clones IEF-1 (Eucalyptus grandis x Eucalyptus sp. hybrid), GE 463 (E. urophylla x E. grandis), and MN 445 (E. grandis x Eucalyptus sp. hybrid) were used in the first assay, and IEF-1, IEF2 (E. grandis x E. urophylla) x Eucalyptus sp. hybrid) and the clones 129 and 7182 (E. grandis x Eucalyptus sp. hybrids) in the second assay. Thirty days...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Chopper NA; Eucalyptus grandis; E. urophylla; Herbicide; Dose-response.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582004000400015
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