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A Dynamic Decision Model of Technology Adoption under Uncertainty: Case of Herbicide-Resistant Rice AgEcon
Annou, Mamane Malam; Wailes, Eric J.; Thomsen, Michael R..
Herbicide-resistant (HR) rice technology is a potential tool for control of red rice in commercial rice production. Using an ex ante mathematical programming framework, this research presents an empirical analysis of HR rice technology adoption under uncertainty. The analysis accounts for stochastic germination of red rice and sheath blight to model a profit maximization problem of crop rotation among HR rice, regular rice, and soybeans. The results demonstrate that risk attitudes and technology efficiency determine adoption rates and optimal rotation patterns.
Tipo: Journal Article Palavras-chave: Biotechnology; Herbicide resistance; Mathematical programming; Profit maximization; Rice; Risk; Rotation; Technology; Adoption; Crop Production/Industries; Production Economics; Research and Development/Tech Change/Emerging Technologies; Q16; Q18; O33; C61.
Ano: 2005 URL: http://purl.umn.edu/43724
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A Rapid Phenotyping Method for Imazamox Resistance in Wheat Planta Daninha
BRECCIA,G.; BISIO,M.B.; PICARDI,L.; NESTARES,G..
ABSTRACT: The availability of imidazolinone (IMI) resistant cultivars has provided an effective option for weed control in wheat production systems. IMI herbicides control several weeds, including Avena fatua and Lolium multiflorum, which are the most frequent grass weeds in wheat crops of the Argentine Pampas. The aim of this study was to develop a soil-less method that allows rapid phenotyping of IMI resistance in wheat. Nine wheat cultivars differing in IMI resistance were evaluated through a between-paper germination method. Herbicide concentrations required to reduce shoot and root length by 50% for resistant cultivars were > 75 fold that of the susceptible cultivars. The response of resistant and susceptible commercial cultivars was assessed in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Imidazolinone; Herbicide resistance; Germination test; Triticum aestivum L.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100344
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ACCase-inhibiting herbicides: mechanism of action, resistance evolution and stewardship Scientia Agricola
Takano,Hudson Kagueyama; Ovejero,Ramiro Fernando Lopez; Belchior,Gustavo Gross; Maymone,Gizella Potrich Leal; Dayan,Franck E..
ABSTRACT Herbicides play an important role in preventing crop yield losses due to both their weed interference ability and their capacity for increasing soil conservation in no-till systems. Group A herbicides or acetyl-CoA carboxylase (ACCase) are essential tools the selective management of glyphosate resistance in grass weed species. In this review, we describe important aspects of ACCase biology and herbicides targeting this enzyme, along with a discussion on stewardship programs to delay the evolution of herbicide resistance which can evolve either through target site and/or non-target site mechanisms. Sixteen-point mutations have been reported to confer resistance to ACCase inhibitors. Each mutation confers cross resistance to a different group of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Herbicide resistance; Integrated weed management; Aryloxyphenoxypropionates; Cyclohexanediones; Phenylpyrazoline.
Ano: 2021 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000101301
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Ammonium Glufosinate Associated with Post-Emergence Herbicides in Corn with the cp4-epsps and Pat Genes Planta Daninha
KRENCHINSKI,F.H.; CESCO,V.J.S.; CASTRO,E.B.; CARBONARI,C.A.; VELINI,E.D..
ABSTRACT: With the possibility of using ammonium glufosinate in corn, studies on its association with other herbicides are essential. The aim of this study was to assess weed control and herbicide selectivity in association with ammonium glufosinate in corn containing the pat and cp4-epsps genes. The experiment was carried out under field conditions in two sites in a randomized block design with four replications. Treatments consisted of ammonium glufosinate, glyphosate, ammonium glufosinate + glyphosate, ammonium glufosinate + nicosulfuron, ammonium glufosinate + atrazine, ammonium glufosinate + tembotrione, ammonium glufosinate + mesotrione, ammonium glufosinate + carfentrazone ethyl, ammonium glufosinate + bentazon, ammonium glufosinate + 2,4-D, control...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ammonia accumulation; Phosphinothricin; Electron transport rate; Herbicide resistance; Zea mays.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100241
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Assessing Genetic Variation and Spread of Phalaris minor Resistant to ACCase Inhibiting Herbicides in Iran Planta Daninha
GHEREKHLOO,J.; ALCÁNTARA-DE LA CRUZ,R.; OSUNA,M.D.; SOHRABI,S.; PRADO,R..
ABSTRACT: Littleseed canarygrass (Phalaris minor) is the second most serious and problematic grass weed in wheat fields in Iran, and has developed resistance to ACCase inhibiting herbicides. Inter-simple sequence repeat (ISSR) analysis was used to assess genetic variation between and within ACCase inhibitor-resistant and susceptible P. minor populations in Iran and to determine the origin of resistance and its dispersal. Sixteen P. minor populations from different regions in Iran were analysed using seven primers. Genetic relationships generated using UPGMA analysis indicated the presence of more than one genotype among the herbicide resistant populations. The results indicated that the high genetic similarity and physical proximity among the resistant P....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Dendrogram; Herbicide resistance; ISSR; Genotype; UPGMA.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100226
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Barnyardgrass with Multiple Resistance to Synthetic Auxin, ALS and Accase Inhibitors Planta Daninha
EBERHARDT,D.S.; OLIVEIRA NETO,A.M.; NOLDIN,J.A.; VANTI,R.M..
ABSTRACT The objective of this research was to confirm the resistance of a barnyardgrass biotype (Echinochloa crus-galli) to herbicides quinclorac (synthetic auxin), penoxsulam (ALS inhibitor) and cyhalofop-butyl (ACCase inhibitor). Two experiments were carried out in a greenhouse located in Itajaí, State of Santa Catarina, Brazil. One experiment evaluating the biotype ECH 18 (known as susceptible) and one with the ECH 141 biotype (suspected to be multiple resistant). The experimental design used was completely randomized, in a 4 x 7 factorial arrangement with four replications. The first factor was the herbicide: cyhalofop-butyl (Clincher(r)), penoxsulam (Ricer(r)), quinclorac (Facet(r)) and propanil (Grassaid(r)) and the second factor consisting of seven...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Paddy rice; Echinochloa crus-galli; Chemical control; Herbicide resistance.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000400823
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Bioassay for detection of transgenic soybean seeds tolerant to glyphosate. Repositório Alice
TORRES, A.C.; NASCIMENTO, W.M.; PAIVA, S.A.V.; ARAGÃO, F.A.S. de.
Glyphosate is a systemic, nonselective, postemergence herbicide that inhibits growth of both weeds and crop plants. Once inside the plant, glyphosate interferes with biosynthesis of aromatic amino acids phenylalanine, tyrosine, and tryptophan, by inhibiting the activity of 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS), a key enzyme of the shikimate pathway. The objective of this work was to develop a simple, effective and inexpensible method for identification of transgenic soybean tolerant to glyphosate. This technique consisted in germinating soybean seeds in filter paper moistened with 100 to 200 mM of glyphosate. Transgenic soybean seeds tolerant to glyphosate germinated normally in this solution and, between 7 and 10 days, started to develop a...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Glycine max; Herbicide resistance; Transgenic plants; Biosynthesis; Resistência a herbicida; Plantas transgênicas; Biossíntese.
Ano: 2003 URL: http://www.alice.cnptia.embrapa.br/handle/doc/109203
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Bioassay for detection of transgenic soybean seeds tolerant to glyphosate PAB
Torres,Antonio Carlos; Nascimento,Warley Marco; Paiva,Sonia Alessandra Vasconcelos; Aragão,Fernando Antonio Souza de.
Glyphosate is a systemic, nonselective, postemergence herbicide that inhibits growth of both weeds and crop plants. Once inside the plant, glyphosate interferes with biosynthesis of aromatic amino acids phenylalanine, tyrosine, and tryptophan, by inhibiting the activity of 5enolpyruvylshikimate-3-phosphate synthase (EPSPS), a key enzyme of the shikimate pathway. The objective of this work was to develop a simple, effective and inexpensible method for identification of transgenic soybean tolerant to glyphosate. This technique consisted in germinating soybean seeds in filter paper moistened with 100 to 200 muM of glyphosate. Transgenic soybean seeds tolerant to glyphosate germinated normally in this solution and, between 7 and 10 days, started to develop a...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Glycine max; Herbicide resistance; Transgenic plants; Biosynthesis.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2003000900005
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BRS A501 CL: herbicide-tolerant upland rice cultivar. Repositório Alice
RANGEL, P. H. N.; CASTRO, A. P. de; LACERDA, M. C.; FURTINI, I. V.; FRAGOSO, D. de B.; SANTOS, B. M. dos; ABREU, A. G. de; CORDEIRO, A. C. C.; PEREIRA, J. A.; CUSTÓDIO, D. P.; UTUMI, M. M.; OLIVEIRA, I. J. de..
BRS A501 CL is the first upland rice cultivar with tolerance to the broad-spectrum herbicide Kifix®. It has a medium-length cycle, high stability of whole grain yield at processing, good disease tolerance and a high grain yield.
Tipo: Nota Técnica/Nota Científica (ALICE) Palavras-chave: Arroz; Oryza Sativa; Melhoramento Genético Vegetal; Herbicida; Variedade Resistente; Rice; Herbicide resistance; Grain yield; Plant breeding; Cultivars.
Ano: 2020 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1121685
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Buva (Conyza sumatrensis) resistente a Paraquat. Repositório Alice
ZOBIOLE, L. H. S.; PEREIRA, V. G. C.; ALBRECHT, A. J. P.; RUBIM, R. S.; ADEGAS, F. S.; ALBRECHT, L. P..
bitstream/item/190293/1/buva-XXXI-CBCPD.pdf
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Erva Daninha; Resistência a Pesticida; Weeds; Herbicide resistance; Conyza.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1103698
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Comparison of Sensitivity to Glyphosate of Euphorbia davidii Populations Planta Daninha
NÚÑEZ FRÉ,F.R.; JUAN,V.F.; YANNICCARI,M.; SAINT ANDRÉ,H.M.; FERNANDEZ,R.R..
ABSTRACT: Euphorbia davidii (Euphorbiaceae) is a summer annual weed present in the Province of Buenos Aires, Argentina. The aim of this study was to compare the sensitivity to glyphosate of different populations of Euphorbia davidii. Two techniques were used: a seed bioassay and shikimate determination in glyphosate-treated plants. Germination rates of seeds belonging to the populations from Espartillar, Barrow, Olavarria and Azul exposed to different concentrations of glyphosate were compared. Plants from the same locations treated with glyphosate were evaluated to determine shikimate levels. The most sensitive population was from Espartillar, with a CE50 (average effective concentration) of 4.00 g e.a. L-1. Based on this finding, the resistance index for...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Herbicide resistance; Germination; Bioassay; Shikimate; EUDA5.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100209
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Competition effects with mixed stands of wheat and kochia (Kochia scoparia) biotypes resistant and susceptible to acetolactase synthase inhibitor herbicides Scientia Agricola
Christoffoleti,P.J.; Westra,P..
Greenhouse experiments were conducted to compare the competitive ability of sulfonylurea resistant and susceptible kochia (Kochia scoparia L. Schard) compared to wheat. The results of several replacement series experiments indicate that wheat was the dominant competitor, and an average of one wheat plant reduced resistant kochia yield per plant equal to the effect of 4.8 resistant kochia or 5.4 susceptible kochia plants. Intraspeciflc competition was more important than interspecific competition for wheat, whereas the reverse was true for the resistant and susceptible kochia. The results of the niche differentiation index (NDI) indicate that wheat and either resistant or susceptible kochia are only partly limited by the same resources. The resistant and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Weed; Herbicide resistance; Sulfonylurea; Kochia scoparia; Weed-crop competition.
Ano: 1994 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161994000200008
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Competitiveness of ALS inhibitors resistant and susceptible biotypes of Greater Beggarticks (Bidens subalternans) Planta Daninha
Lamego,F.P.; Vidal,R.A.; Burgos,N.R..
The continuous use of ALS-inhibiting herbicides has led to the evolution of herbicide-resistant weeds worldwide. Greater beggarticks is one of the most troublesome weeds found in the soybean production system in Brazil. Recently, a greater beggarticks biotype that is resistant (R) to ALS inhibitors due to Trp574Leu mutation in the ALS gene was identified. Also, the adaptive traits between susceptible (S) and R to ALS inhibitors biotypes of greater beggarticks were compared. Specifically, we aimed to: (1) evaluate and compare the relative growth rates (RGR) between the biotypes; (2) analyze the seed germination characteristics of R and S biotypes under different temperature conditions; and (3) evaluate their competitive ability in a replacement series...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bidens; Fitness; Herbicide resistance; Replacement series.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582011000200024
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Contribution of non-target-site resistance in imidazolinone-resistant Imisun sunflower Bragantia
Breccia,Gabriela; Gil,Mercedes; Vega,Tatiana; Altieri,Emiliano; Bulos,Mariano; Picardi,Liliana; Nestares,Graciela.
ABSTRACT The first commercial herbicide-resistant trait in sunflower (Helianthus annuus L.) is known as ‘Imisun’. Imidazolinone resistance in Imisun cultivars has been reported to be genetically controlled by a major gene (known as Imr1 or Ahasl1-1) and modifier genes. Imr1 is an allelic variant of the Ahasl1 locus that codes for the acetohydroxyacid synthase, which is the target site of these herbicides. The mechanism of resistance endowed by modifier genes has not been characterized and it could be related to non-target-site resistance. The objective of this study was to evaluate the role of cytochrome P450 monooxygenases (P450s) in Imisun resistance. The response to imazapyr herbicide in combination with P450s inhibitor malathion was evaluated in 2...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Helianthus annuus L.; Cytochrome P450 monooxygenases; Imazapyr; Herbicide resistance.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052017000400536
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Defenses against ROS in crops and weeds: the effects of interference and herbicides. Repositório Alice
CAVERZAN, A.; PIASECKI, C.; CHAVARRIA, G.; STEWART JR, C. N.; VARGAS, L..
bitstream/item/203387/1/ID44704-2019v20n5IntJMolSci.pdf
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Herbicida; Erva Daninha; Herbicide resistance; Oxidative stress; Weeds; Reactive oxygen species.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1113370
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Development and molecular characterization of herbicide resistant transgenic rice (Oryza sativa L.) and assessment of gene flow from transgenic to non-transgenic rice using gus as a reporter gene International Rice Research Institute
Kaur, Jatinder.
xvi, 133 p. : col. ill. Thesis (Ph.D.) -- University of the Philippines at Los Baños
Tipo: Thesis Palavras-chave: Rice; Genetic engineering; Molecular genetics; Herbicide resistance; Transgenic plants; Gene flow; Reporter genes.
Ano: 2002 URL: http://hdl.handle.net/123456789/434
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Dose-response curves of Lolium multiflorum biotypes resistant and susceptible to clethodim. Repositório Alice
VARGAS, L.; FRAGA, D. S.; AGOSTINETTO, D.; MARIANI, F.; DUARTE, T. V.; SILVA, B. M..
2013
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Azevém; Ciclohexanodionas; Resistência a herbicidas; Ryegrass; Cyclohexanodiones; Herbicide resistance.
Ano: 2013 URL: http://www.alice.cnptia.embrapa.br/handle/doc/978444
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Dose-response curves of Lolium multiflorum biotypes resistant and susceptible to clethodim Planta Daninha
Vargas,L.; Fraga,D.S.; Agostinetto,D.; Mariani,F.; Duarte,T.V.; Silva,B.M..
Chemical control with herbicides, especially glyphosate, is the main method used to control ryegrass. However, the repeated use of glyphosate has selected resistant ryegrass biotypes. Thus, the ACCase inhibitor herbicides have become the main alternative to control glyphosate-resistant biotypes, being widely used by farmers in Rio Grande do Sul. Repeated use of ACCase inhibitors, in turn, have selected ryegrass biotypes resistant to this herbicide mechanism. Thus, the objective of this study was to evaluate the response of ryegrass biotypes to different clethodim rates by dose-response curves. Increasing doses (0, 12, 24, 48, 72, 96, 144 and 192 g a.i. ha-1) of the herbicide clethodim were applied at the 3-4 ryegrass leaf stage. The variables control at 14...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ryegrass; Cyclohexanodiones; Herbicide resistance.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582013000400015
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Economic impacts of high labour cost and herbicide resistance for the management of annual barnyardgrass (Echinochloa crus-galli) in rice production in the Philippines AgEcon
Beltran, Jesusa C.; Pannell, David J.; Doole, Graeme J..
Implications of increasing labour cost and development of herbicide resistance for profitable weed management in Philippine rice farming systems are investigated. The study employs RIMPhil (Resistance and Integrated Management in the Philippines), a bioeconomic simulation model developed to provide a comprehensive assessment of integrated weed management programmes for the control of annual barnyardgrass (Echinochloa crus-galli) in rice crops. Results indicate that herbicide application will become increasingly economically attractive, relative to manual weeding, as labour cost increases. This is important since urban migration in the Philippines continues to increase the scarcity of rural labour. Results also show that the onset of herbicide resistance...
Tipo: Working or Discussion Paper Palavras-chave: Barnyardgrass; Bioeconomic model; Herbicide resistance; Integrated weed management; Rice production; Crop Production/Industries; Farm Management; Research and Development/Tech Change/Emerging Technologies.
Ano: 2011 URL: http://purl.umn.edu/108770
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Euphorbia heterophylla: um novo caso de resistência ao glifosato no Brasil. Infoteca-e
ADEGAS, F. S.; GAZZIERO, D. L. P.; OLIVEIRA JUNIOR, R. S. de; MENDES, R. R.; RODRIGUES, L. J..
bitstream/item/211648/1/ComTec-98.pdf
Tipo: Comunicado Técnico (INFOTECA-E) Palavras-chave: Herbicida; Resistência a Produtos Químicos; Euphorbia Heterophylla; Herbicide resistance.
Ano: 2020 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1121045
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