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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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Association of chemical and mechanical weed control methods during the pre-harvest of coffee crops Planta Daninha
P. Ronchi,Cláudio.
Abstract Background: Weed control in the pre-harvest of the coffee crop is essential to enable mechanized coffee harvesting. Objective: Testing the efficacy of pre-emergent herbicides, applied after brush shredder or desiccation operations, on the weed control during the coffee crop’s pre-harvest. Methods: Two separate trials were accomplished in commercial Coffea arabica crops in the Cerrado Mineiro Region. In the first one, oxyfluorfen and sulfentrazone were applied after either brush shredder or burndown operation; in the second, they were tested as a tank mixture with glyphosate. Results: In the first assay, the brush shredder use, associated to the rains that follow, stimulated a sharp weed infestation during the pre-harvest, which was not...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Coffea arabica; Burndown; Herbicide; Integrated weed management.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100329
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Bioeconomic evaluation of allelopathic crop leachates integrated with reduced doses of herbicide for horse purslane management in maize under field conditions Planta Daninha
N. Mushtaq,Muhammad; I. Hashmi,Muhammad; Tariq,Tabinda; Matloob,Amar; Hussain,Safdar; A. Cheema,Zahid.
Abstract Background: Continuous use of commercial herbicides is posing a severe threat to environment and creating herbicide resistant weeds. Allelopathy offers a promising alternative to commercial herbicides for sustainable weed management. The farmers are highly concerned with maximum yield as well as cost of the weed control techniques. Objective: To investigate economic and weed control efficiency of allelopathic crop water leachates mixed with lower rates of herbicide. Methods: Rapeseed (Brassica napus L.), sunflower (Helianthus annuus L.) and sorghum (Sorghum bicolor L.) crop leachates (18 L ha-1 each) tank mixed with lower doses (25, 33 and 50% of recommended dose) of S-metolachlor+atrazine were sprayed as pre-emergence for horse purslane...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Allelopathy; Bioeconomic; Integrated weed management; Marginal analysis; Trianthema portulacastrum; Zea mays.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100317
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Economic analysis of integrated weed management strategies for annual barnyardgrass (Echinochloa crus-galli complex) in Philippine rice farming systems AgEcon
Beltran, Jesusa C.; Pannell, David J.; Doole, Graeme J.; White, Benedict.
This paper describes a dynamic simulation model that has been developed to provide a comprehensive assessment of integrated weed management programmes for the control of annual barnyardgrass (Echinochloa crus-galli complex) in Philippine rice farming systems. The main outputs of the model include weed seed and plant densities and seasonal and annualised profit over the simulated planning horizon. Model output emphasises the substantial economic benefits associated with effective long-term weed management strategies. In addition, a mixture of chemical and non-chemical treatments provides good weed control in rice crops, and maximises long-term profit for systems where the main weed is annual barnyardgrass. However, the performance of this strategy is...
Tipo: Presentation Palavras-chave: Barnyardgrass; Bioeconomic model; Integrated weed management; Rice farming systems.; Crop Production/Industries.
Ano: 2012 URL: http://purl.umn.edu/124236
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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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Fitness Cost and Competitive Ability to Different Ploidy Levels in Ryegrass Genotypes Planta Daninha
SCHMITZ,M.F.; CECHIN,J.; HENCKES,J.R.; PIASECKI,C.; AGOSTINETTO,D.; VARGAS,L..
ABSTRACT: The intergenotypic competition of tetraploid ryegrass with natural diploid population may be a tool to reduce the frequency of resistant individuals in an area. This study aimed to identify and compare the phenological development, fitness cost, and competitive ability between diploid and tetraploid ryegrass genotypes. Genotypes were grown in pots, and the morphological variables of genotype growth were assessed every 15 days up to 120 days after emergence to evaluate the fitness cost. Phenological development and seed yield components were measured in a single time together with the fitness cost. Competitive ability was determined in a replacement-series experiment with proportions of tetraploid and diploid ryegrass, in which the number of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Lolium multiflorum; Competition; Diploid; Tetraploid; Integrated weed management.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100189
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Glyphosate Applied at the Early Reproductive Stage Impairs Seed Production of Glyphosate-Resistant Hairy Fleabane Planta Daninha
PIASECKI,C.; MAZON,A.S.; MONGE,A.; CAVALCANTE,J.A.; AGOSTINETTO,D.; VARGAS,L..
ABSTRACT: Glyphosate-resistant hairy fleabane [Conyza bonariensis (L.) Cronq.] is one of the most important weeds in the world. Among the factors that make this weed species widely distributed in the most diverse environments is the high seed production capacity and dispersal. Hairy fleabane plants not controlled by herbicide application regrowth and overcome crop canopy, use environmental resources, interfere with crops, and complete their life cycle by producing thousands of seeds and replenishing the seed bank. Management strategies that reduce production and viability of hairy fleabane seeds can be adopted within the integrated management to reduce the seed bank and prevent further infestations. In this way, experiments were carried out in a greenhouse...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Conyza bonariensis; Resistance; Integrated weed management; Prevention; Soil seed bank.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100198
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Glyphosate Resistance Affect the Physiological Quality of Conyza bonariensis seeds Planta Daninha
PIASECKI,C.; MAZON,A.S.; AGOSTINETTO,D.; VARGAS,L..
ABSTRACT: High seed production and dispersal capacity and glyphosate resistance are among the main factors that have made hairy fleabane (Conyza bonariensis) one of the most important and dispersed weeds in the world. Herbicide-resistant weeds populations may have fitness cost due to molecular, physiological, and biochemical changes. This study aimed to evaluate the physiological quality of seeds of Conyza spp. and determine whether glyphosate resistance causes fitness costs for resistant biotypes. Seeds from six hairy fleabane biotypes, three glyphosate-resistant and three -sensitive, with a resistance factor average of 11.7 were studied. Among the studied biotypes, five were identified as C. bonariensis and one as C. blakei. Seed analyses were performed...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Herbicide resistance; Integrated weed management; Weed biology; Soil seed bank; Conyza blakei.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100157
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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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Influence of Tillage Systems and Selective Herbicides on Weed Management and Productivity of Direct-Seeded Rice (Oryza sativa) Planta Daninha
ABBAS,A.; KHALIQ,A.; SAQIB,M.; MAJEED,M.Z.; ULLAH,S.; HAROON,M..
ABSTRACT: Weeds cause considerable damage to rice crop. To ascertain the influence of different weed management practices under different tillage systems, a field experiment was conducted during 2014-15. Experimental design was RCB with split-plot arrangement and with a net plot size of 6 x 2 m. Three tillage systems viz; zero tillage with glyphosate application and conventional tillage with and without stale seed bed, and seven weed management treatments viz; weedy check, manual weeding, oxadiargyl as pre-emergence, pyrazosulfuron as pre-emergence, pyrazosulfuron as post-emergence, fenoxaprop-ethyle + sodium fluoride as post-emergence and fenoxaprop-ethyle + sodium fluoride as post-emergence. Results revealed that all treatments including tillage systems...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Oryza sativa L.; Direct-seeded rice; Tillage systems; Herbicides; Integrated weed management.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100280
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Integrated Role of Row Spacing and Adjuvant to Reduce Herbicide Dose in Maize Under Semi-Arid Conditions Planta Daninha
NADEEM,M.A.; ABBAS,T.; BASHIR,F.; MAQBOOL,R..
ABSTRACT: Crop row spacing adjustment and adjuvants have a significant role in decreasing herbicide cost and environmental damage by reducing herbicide application rate. A field study was conducted to assess the impact of two row spacing values and reduced herbicide rates along with adjuvant on weeds in maize in 2014 and 2015. The experiment consisted of atrazine plus mesotrione plus halosulfuran methyl (pre-mixed herbicide) at label rate (719.2 g a.i. ha-1); reduced rates of 75% (539.4 g a.i. ha-1) and 50% (359.6 g a.i. ha-1) alone and in combination with alkyl ether sulphate at 396.8 mL ha-1 as an adjuvant along with weedy check in maize sown at 60 and 75 cm row spacing. Alkyl ether sulphate increased weed control efficacy (13-35%) of the pre-mixed...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Alkyl ether sulphate; Economic analysis; Integrated weed management; Narrow row maize; Reduced herbicide dose; Weed control efficiency.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100237
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Levantamento florístico de plantas daninhas em lavoura de milho cultivada no cerrado de Goiás. Infoteca-e
FONTES, J. R. A.; SHIRATSUCHI, L. S..
RESUMO: Neste trabalho, objetivou-se realizar um levantamento florístico e plantas daninhas em uma lavoura de milho cultivada na primavera-verão em sistema de plantio direto no Cerrado do Estado de Goiás, sendo empregado para isso o método de quadrado inventário. A área amostrada correspondeu a 107,5 ha e foi dividida em grade regular de 50 x 50 m, totalizando 430 pontos. Num raio de 5 m, ao redor de cada ponto, foi lançado aleatoriamente um quadrado de ferro de 50 cm de lado (0,25 metros quadrados), num total de quatro vezes. (1,0 metros quadrados). Os seguintes parâmetros foram calculados: frequência, frequência relativa, densidade, densidade relativa, abundância, abundância relativa e índice de valor de importância. Foram identificadas 23 espécies de...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) Palavras-chave: Planta daninha; Manejo integrado; Identification; Maize; Zero tillage.; Erva Daninha; Identificação; Milho; Plantio Direto; Zea Mays.; Integrated weed management; Weeds..
Ano: 2005 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/544627
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Managing glyphosate-resistant weeds with cover crop associated with herbicide rotation and mixture Ciência e Agrotecnologia
Marochi,Aroldo; Ferreira,Antonio; Takano,Hudson Kagueyama; Oliveira Junior,Rubem Silvério; Ovejero,Ramiro Fernando Lopez.
ABSTRACT Herbicide resistance has become a major concern for agricultural systems, and integrating weed management practices seem to be the most promise way for its mitigation. The effects of cropping systems including ruzigrass (Urochloa ruziziensis) associated with herbicide rotation programs were evaluated for the management of glyphosate resistant conyza (Conyza sumatrensis) and sourgrass (Digitaria insularis) in soybean and corn production systems. A 3x3 factorial was evaluated in four consecutive soybean (spring-summer) and corn (fall-winter) double cropping seasons. Factor A consisted of three combinations of cropping systems in the fall-winter: corn, corn plus ruzigrass, and ruzigrass alone. Factor B was based on increasing levels of diversity in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Digitaria insularis; Conyza sumatrensis; Integrated weed management; Urochloa ruziziensis; Herbicide resistance..
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542018000400381
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Overviewing of weed management practices to reduce weed seed bank and to increase maize yield Planta Daninha
Maqsood,Qaiser; N. Abbas,Rana; A. Iqbal,Muhammad; A. Serap,Kizil; Iqbal,Asif; Sabagh,Ayman El.
Abstract Background: Weeds are unwanted and undesirable plants which deteriorate the quality of agricultural products and interfere with farming activities. Most of the weeds (indigenous and invasive) seeds get preserved in soil horizons as weed seed bank which ensure their survival leading to the spoilage of quantitative and qualitative functioning of agricultural farms. Objective: To keep weeds below threshold level, elimination of weeds seed before germination can be a viable and pro-ecological approach. To achieve this objective, weed seeds reserved in the soil which serve as an effective pool to ensure their survival necessitate weed-seed bank management. Thus the ultimate goal was to synthesize and analyze research findings on weed seed bank...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Allelopathy; Herbicide pollution; Integrated weed management; Weed seed pool; Zea mays L..
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100501
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Prevenção e controle da tiririca em áreas cultivadas com hortaliças. Infoteca-e
PEREIRA, W..
bitstream/item/107342/1/CNPH-DOCUMENTOS-15-PREVENCAO-E-CONTROLE-DA-TIRIRICA-EM-AREAS-CULTIVADAS-COM-HORTALICAS-FL-07825.pdf
Tipo: Circular Técnica (INFOTECA-E) Palavras-chave: Prevencao; Manejo integrado; Disseminacao; 2; 4 D; EPTC; Imazetapyr; MSMA; Naproparmide; Sulfosate; Brasilia; Distrito Federal; Brasil; Prevention; Nutsedge.; Cerrado; Controle Químico; Cyperus Rotundus; Cyperus Esculentus; Erradicação; Herbicida; Hortaliça; Paraquat; Propanil; Tiririca.; Alachlor; Brazil; Atrazine; Diquat; Dicamba; Chemical control; Bentazon; Butylate; Herbicides; Glyphosate; Diuron; Integrated weed management; Imazapyr; Molinate; Metolachlor; Simazine; Vegetables..
Ano: 1998 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/765603
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Rapid Detection of Horseweed and Black Picker Sensitivity Levels to Saflufenacil Planta Daninha
VARGAS,L.; HENCKES,J.R.; GAVA,F.; AGOSTINETTO,D.; CARVALHO,I.R.; RAMOS,R.; RODRIGUES,R..
ABSTRACT: Resistance to herbicides is one of the main factors responsible for weed control failures. Once uncontrolled and stressed, resistant weeds demand a new application of herbicides from different modes of action, which results in higher monetary costs and environmental impact. Knowledge of weed sensitivity levels to herbicides before making decisions for their management in the field is paramount to increasing the efficiency of integrated weed management. Thus, methods that allow the rapid determination of sensitivity levels can help to the correct recommendation before the application, and thus, favor the greater technical, economic and environmental efficiency of weed management. The objective of this work was to validate a rapid method to detect...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Integrated weed management; Resistance; Control; Efficiency.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100222
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Response of Arabica Coffee Cultivars to Competition from Beggarticks Planta Daninha
BORGES,L.G.M.; MIRANDA,F.R.; BORGES,A.M.; SILVA,J.R.O.; CAMPOS,A.A.V.; RONCHI,C.P..
ABSTRACT: The goal of this study was to analyze the response of Arabica coffee cultivars grown under three levels of Bidens pilosa (beggarticks) interference. At 30 days after transplanting (DAT) of 14 Arabica coffee cultivars into 11 L pots, beggarticks was seeded in the pots and soon after emergence, three levels of weed infestation were established: none, low (two plants per pot), and high (five plants per pot). Treatments were arranged in a 14 × 3 factorial scheme under a completely randomized design, with four replicates. Coffee plant growth was evaluated at both weed emergence and blossoming (90 DAT) when the experiment was completed. Regardless beggarticks infestation levels, significant effects of cultivars occurred on almost all the coffee growth...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bidens pilosa; Coffea arabica; Weed competition; Cultural control; Growth; Integrated weed management.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100159
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Response of weed populations to tillage, reduced herbicide and fertilizer rates in wheat (Triticum aestivum) production Planta Daninha
Acciaresi,H.A.; Balbi,H.V.; Bravo,M.L.; Chidichimo,H.O..
Field experiments were carried out in 1999 and 2000 to investigate the effects of conventional (CT) and no-tillage (NT) systems, interacting with three herbicide dose levels and three nitrogen (N) levels on weed growth and wheat production of two varieties. There was a higher grain yield for NT system compared with CT in one year. CT weed biomass was lower than from NT weed biomass, in both varieties. No differences on wheat biomass and grain yield were observed between full and reduced herbicide rates. N fertilizer increased wheat biomass and grain yield significantly. Only N medium level had an effect upon weed biomass with respect to non-fertilized plots, while the highest fertilization rate lowered weed biomass. Conventional tillage, reduced herbicide...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Integrated weed management; Low input; Triticum aestivum.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582003000100013
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RIMPhil: a bioeconomic model for integrated weed management of annual barnyardgrass (Echinochloa crus-galli) in Philippine rice farming systems AgEcon
Beltran, Jesusa C.; Pannell, David J.; Doole, Graeme J.; White, Benedict.
This paper describes a complex, dynamic simulation model that has been developed for the analysis of integrated weed management programmes for the control of annual barnyardgrass (Echinochloa crus-galli) in rice farming systems in the Philippines. Users of the model may simulate any feasible combination of 49 weed treatments options across wet and dry cropping seasons over 5, 10, 15, and 20 year periods, subject to a predetermined sequence of planting methods. The main outputs of the model include weed seed and plant densities and seasonal and annualised profit over the simulated planning horizon. Model output emphasises the substantial economic benefits associated with effective long-term weed management strategies. In addition, the most-profitable weed...
Tipo: Working or Discussion Paper Palavras-chave: Barnyardgrass; Bioeconomic model; Integrated weed management; Rice farming systems.; Agricultural and Food Policy; Crop Production/Industries; Environmental Economics and Policy; Farm Management.
Ano: 2011 URL: http://purl.umn.edu/104637
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Weed control under integrated nutrient management systems in faba bean (Vicia faba) production in Egypt Planta Daninha
El-Metwally,I.M.; Abdelhamid,M.T..
Two field experiments were conducted in two successive seasons, 2005/2006 and 2006/2007, to determine whether management can improve faba bean competitiveness with weeds, thus helping to achieve its yield potential. The experiment included five treatments, composed of organic and mineral fertilizers, alone and mixed at different rates, along with a control and six weed control treatments, including oxadiargyl, prometryn, hand hoeing treatments alone or mixed with the herbicides, and a nonweeded treatment (control).The herbicide treatments were not superior to the two hand-hoeing treatments. Using compost favored growth and yield of faba bean more than of weeds. Adding fertilizer also improved most yield parameters. Application of compost alone or combined...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Faba bean; Integrated nutrient management system; Integrated weed management.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582008000300014
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