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Registros recuperados: 170
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A bioeconomic model for determining the optimal response to a new weed incursion in Australian cropping systems AgEcon
Jayasuriya, Rohan T.; Jones, Randall E..
Invasions by non-indigenous plant species pose serious economic threats to Australian agricultural industries. When an invasion is discovered a decision has to be made as to whether to attempt to eradicate it, contain it or do nothing. These decisions should be based on long term benefits and costs. This paper describes a bioeconomic simulation framework with a mathematical model representing weed spread linked to a dynamic programming model to provide a means of determining the economically optimal weed management strategies over time. The modelling framework is used to evaluate case study invasive weed control problems in the Australian grains industry.
Tipo: Conference Paper or Presentation Palavras-chave: Weeds; Incursion; Bioeconomic model; Crop Production/Industries; Research Methods/ Statistical Methods.
Ano: 2008 URL: http://purl.umn.edu/6015
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A buva (Conyza spp.) pode ser considerada planta hospedeira de Spodoptera frugiperda e Helicoverpa armigera? Infoteca-e
MENDES, S. M.; SILVA, A. F. da; CARVALHO, S. S. de S.; SOUZA, C. da S. F..
bitstream/item/149620/1/ct-215.pdf
Tipo: Comunicado Técnico (INFOTECA-E) Palavras-chave: Planta daninha; Erva daninha; Lagarta; Praga de planta; Weeds; Insect larvae; Plant pests.
Ano: 2016 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1055931
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A practical field guide to weeds of rice in Asia. International Rice Research Institute
Caton, B.P.; Mortimer, M.; Hill, J.E.; International Rice Research Institute..
116 p. : col. ill.
Tipo: Book Palavras-chave: Weeds; Botany; Ecology; Cultural Control; Guide books; Asia.
Ano: 2004 URL: http://hdl.handle.net/123456789/1018
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A soja e as plantas daninhas. Infoteca-e
GAZZIERO, D. L. P.; VOLL, E..
As consequências. O que fazer? Manejo integrado.
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E) Palavras-chave: Soja; Erva daninha; Soybeans; Weeds.
Ano: 1996 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/459837
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Adaptability of lettuce cultivars to planting in no-tillage on straw of Urochloa ruziziensis PAB
Hirata,Andréia Cristina Silva; Hirata,Edson Kiyoharu; Camara,João Augusto Rizzo.
Abstract: The objective of this work was to evaluate the adaptability of different lettuce (Lactuca sativa) cultivars grown in no-tillage on straw of ruzi grass (Urochloa ruziziensis), as well as its effects on soil temperature and weed control, in successive cultivations in the summer. The treatments were carried out in a randomized complete block design, with four replicates, in a split-plot arrangement (2x4), in which soil management (no-tillage on ruzi grass and convention tillage) was the main plot, and the different crisphead lettuce cultivars (Amanda, Solaris, Vanda, and Vera), the subplots. No difference was observed between cultivars for soil management. No-tillage reduced the soil temperature by up to 3.7°C and weed density by 3.7 times, in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Brachiaria; Lactuca sativa; Soil conservation; Soil temperature; Vegetable crops; Weeds.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000700824
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Adoption of Best Management Practices to Control Weed Resistance By Cotton, Corn, and Soybean Growers AgEcon
Frisvold, George B.; Hurley, Terrance M.; Mitchell, Paul D..
This study examined adoption of ten best management practices (BMPs) to control weed resistance to herbicides. Using data from a survey of 1,205 U.S. cotton, corn, and soybean growers, count data models were estimated to explain the total number of practices frequently adopted. Ordered probit regressions were used to explain the frequency of individual BMP adoption. Growers practicing a greater number of BMPs frequently (a) had more education, but less farming experience; (b) grew cotton, (c) expected higher yields relative to the county average; and (d) farmed in counties with a lower coefficient of variation (CV) for yield of their primary crop. Yield expectations and variability were significant predictors of the frequency of adoption of individual...
Tipo: Conference Paper or Presentation Palavras-chave: Weeds; Herbicide; Resistance management; Corn; Cotton; Soybeans; Adoption; Crop Production/Industries; Farm Management; Production Economics; Research and Development/Tech Change/Emerging Technologies; Q12; Q16.
Ano: 2009 URL: http://purl.umn.edu/49432
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Ajuste fitotécnico e competitividade de genótipos de soja BRS convencionais. Infoteca-e
TELES, B.; MARQUES, K.; GARCIA, R. A..
bitstream/item/189947/1/ORAL12.pdf
Tipo: Outras publicações técnicas (INFOTECA-E) Palavras-chave: Soja convencional; Cultivar; Erva Daninha; Weeds; Cultivars; Soybeans.
Ano: 2018 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1103268
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Allelopathic activity and potential natural herbicide from sunflower (Helianthus annuus L.) International Rice Research Institute
Park, Kwang Ho.
132 l. : ill. Thesis (Ph.D.) -- University of the Philippines at Los Baños
Tipo: Thesis Palavras-chave: Sunflower oil; Allelopathy; Herbicides; Weeds; Chemical control; Rice.
Ano: 1991 URL: http://hdl.handle.net/123456789/932
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Allelopathic effects of aqueous and organic fractions of Euphorbia dracunculoides Lam. on germination and seedling growth of chickpea and wheat Chilean J. Agric. Res.
Tanveer,Asif; Kamran Jabbar,Muhammad; Kahliq,Abdul; Matloob,Amar; Nadeem Abbas,Rana; Mansoor Javaid,Muhammad.
Identification of weed species with allelopathic potential and characterization of their adverse effects against associated crops is required for better understanding of weed-crop interactions. Phytotoxic activity of Euphorbia dracunculoides Lam. on germination and seedling growth of chickpea (Cicer arietinum L.) and wheat (Triticum aestivum L.) was investigated under controlled conditions. Two separate studies were done with each of four organic solvent fractions (n-hexane, chloroform, ethylacetate, 1-butanol) and crude aqueous (1:10 and 1:20) whole plant fractions of E. dracunculoides using distilled water and 0.05% (v/v) dimethyl sulfoxide (DMSO) as control. Different aqueous and organic fractions of E. dracunculoides had a significant bearing on...
Tipo: Journal article Palavras-chave: Allelopathy; Weeds; Germination attributes; Suppression; Phenolics.
Ano: 2012 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392012000400006
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Allelopathic effects of orange (Citrus sinensis L.) peel essential oil Acta Botanica
Ribeiro,Jose Pedro Nepomuceno; Lima,Maria Inês Salgueiro.
Crop weeds are the main problem in agriculture, causing a worldwide annual loss of about US$95 billion. The principal method for control is the use of synthetic herbicides. The continued use of these products increases crop costs, reduces crop quality, and leaves toxic residues in the environment, which are a threat to human and livestock health. Therefore, there is a demand for environmentally friendly methods of weed control. The use of allelopathic compounds from crop residues is an alternative. Orange is one of the biggest crops in the world, and its cultivation generates large amounts of residues. There is strong evidence of bioactivity in orange peel essential oil. Therefore, the objective in this work was to verify the allelopathic proprieties of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Allelopathy; Crop residues; Limonene; Organic agriculture; Weeds; Weed controly.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062012000100025
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Allelopathic Potential of Lavender’s Extract and Coumarin Applied as Pre-Plant Incorporated Into Soil Under Agronomic Conditions Planta Daninha
NAZEMI,A.H.; ASADI,G.A.; GHORBANI,R..
ABSTRACT: This study aimed to further explore that if coumarin and lavender’s extract, similar to greenhouse conditions, are phytotoxic towards some plant species under agronomic conditions. Before planting of maize, coumarin at 0, 250, 500, 1,000, 2,000, and 4,000 g h-1 and lavender’s aqueous extract at 0, 1,000, 2,000, 4,000, 8,000, and 16,000 mL h-1 were applied and incorporated into soil at a 3-5 cm depth. The density and biomass of weeds was significantly reduced by applying both compounds. The inhibition ability was also rate-dependent. Although the density and biomass of maize was also decreased at high rates, this crop showed higher tolerant to both compounds that all weeds.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Allelopathy; Natural herbicides; Maize; Weeds.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100264
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Allelopathic testing of Pedicularis kansuensis (Scrophulariaceae) on seed germination and seedling growth of two native grasses in the Tibetan plateau Phyton
Shang,ZH; Xu,SG.
Abstract. Pedicularis kansuensis is a dominating poisonous weed, and it might have allelopathic effects on other native grasses in al­pine meadows. An experiment was conducted to examine a range of concentrations of aqueous whole plant extracts (25, 12.5, 2.5, 1.25, 0.25 and 0.0 g/L) of P. kansuensis, prepared at the flowering stage on seed germination and seedling growth of two native grasses (Poa pra­tensis and Elymus nutans). High concentrations of aqueous extracts of P. kansuensis inhibited seed germination and seedling growth of P. pratensis (p< 0.05). Most aqueous extracts of P. kansuensis had a stimulatory (p< 0.05) effect on E. nutans. Our results suggest that the allelopathic ecology of P. kansuensis on other native grasses needs further...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biological allelopathy; Aqueous extracts; Weeds; Native grasses; Alpine meadows.
Ano: 2012 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572012000100011
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Alternaria alternata f. sp. sphenocleae, a potential mycoherbicide of gooseweed (Sphenoclea zeylanica Gaertner) International Rice Research Institute
Masangkay, Rhomela Favila.
xxi, 195 l. : ill. Thesis (Ph.D.) -- McGill University
Tipo: Thesis Palavras-chave: Rice; Weed control; Weeds; Biological control; Mycoherbicides; Alternaria alternata; Sphenocleaceae.
Ano: 1996 URL: http://hdl.handle.net/123456789/610
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Amaranthus palmeri no Brasil. Infoteca-e
GAZZIERO, D. L. P.; ADEGAS, F. S..
Características. Informações adicionais.
Tipo: Comunicado Técnico (INFOTECA-E) Palavras-chave: Caruru; Erva Daninha.; Weeds; Amaranthus palmeri.
Ano: 2016 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1033720
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Amaranthus palmeri no Paraná: alerta. Infoteca-e
GAZZIERO, D. L. P.; ADEGAS, F. S..
O problema. Características. O que fazer?
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E) Palavras-chave: Erva daninha; Weeds.
Ano: 2016 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1038351
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Antibacterial and Antioxidant Activities of Slender Amaranth Weed Planta Daninha
AKBAR,M.; SHERAZI,I.N.; IQBAL,M.S.; KHALIL,T.; WAQAS,H.M..
ABSTRACT: In the present study, antibacterial and antioxidant [1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical scavenging activity] activities of a weed, slender amaranth (Amaranthus viridis L.) were investigated. Extracts of different plant parts were prepared in n-hexane, chloroform and ethyl acetate. Antibacterial activity was measured by using 100 mg mL-1 concentration extracts against 4 deadly phytopathogenic bacterial species viz. Pseudomonas syringae Van Hall, Ralstonia solanacearum Smith, Erwinia carotovora (Jones), Holland and Xanthomonas axonopodis Hasse. In antioxidants assays, 10, 20 and 30 mg mL-1 extracts were used keeping DPPH as control. In these bioassays, ethyl acetate fraction of A. viridis leaf exhibited the best antibacterial and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amaranthus viridis; Bioactive components; DPPH; Phytopathogens; Weeds.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100206
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Application of Various Herbicides on Controlling Large and Narrow Leaf Weeds and Their Effects on Physiological and Agronomic Traits of Wheat Planta Daninha
Bari,A.; Baloch,M.S.; Shah,A.N.; Khakwani,A.A.; Hussain,I.; IQBAL,J.; Ali,A.; Bukhari,M. A..
ABSTRACT: In order to examine application of various herbicides for controlling weeds in wheat crop, a field trial was conducted at the Agronomic Research Area, Faculty of Agriculture, Gomal University, Dera Ismail Khan, Khyber Pakhtunkhwa (KPK) during the year 2015-2016. The experiment was laid out in a randomized complete block design (RCBD) with split-plot arrangements having three replications. The main plot was comprised application time of herbicides while the use of herbicides was assigned to sub-plots. The data revealed that most of the weed parameters, physiological traits and agronomic attributes of crop plants were significantly affected by weed management practices including the use of herbicides at different time intervals over the weedy...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Weeds; Herbicides; Practices; Control.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100209
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As plantas daninhas e a resistência aos herbicidas. Infoteca-e
GAZZIERO, D. L. P.; PURÍSSIMO, C.; ADEGAS, F. S.; VOLL, E.; BRIGHENTI, A. M.; PRETE, C. E. C..
O que é? Como ocorre? Classificação dos herbicidas. Tabela periódica dos herbicidas: nome comum. Tabela periódica dos herbicidas: marca comercial. Mecanismo de ação. Manejo e Prevenção da resistência.
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E) Palavras-chave: Plantas daninhas; Herbicidas; Erva daninha; Herbicida; Weeds; Herbicides.
Ano: 2002 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/459736
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Bioherbicidal Assessment of Aqueous Extracts of Mesquite (Prosopis juliflora) on Weeds Control and Growth, Yield and Quality of Wheat Planta Daninha
SHAH,R.H.; BALOCH,M.S.; KHAN,A.A.; IJAZ,M.; ZUBAIR,M..
ABSTRACT: Two-year field experiments were conducted to investigate the phytotoxicity of mesquite (Prosopis juliflora) on weed control and yield of wheat in 2013-14 and 2014-15. Mesquite aqueous extracts were prepared with 10, 20, 30 and 40% concentration of leaves, stems, and roots and were compared with tap water (control). These experiments were laid out in a completely randomized block design with four replications. All parameters (weed density, fresh weed biomass, dry weed biomass, chlorophyll content, leaf area index, leaf area duration, crop growth rate, net assimilation rate, plant height and number of tillers) were significantly reduced by applying the mesquite extracts. Among different concentrations, the maximum level (40%) of all three plant...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Allelopathy; Extract; Weeds; Wheat yield.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100214
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Capim-amargoso resistente ao glifosato. Infoteca-e
GAZZIERO, D. L. P.; ADEGAS, F. S.; FORNAROLLI, D. A.; LÓPES OVEJERO, R. F..
O problema. O que é? Como controlar? Importante.
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E) Palavras-chave: Erva daninha; Weeds.
Ano: 2013 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/946630
Registros recuperados: 170
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