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| Vega,Andrea S.; Rúgolo De Agrasar,Zulma E.. |
| Digitaria cuatrecasasii, nueva especie de Honduras, Panamá, Colombia y Venezuela, se describe e ilustra. Se discute la posición taxonómica de D. cuatrecasasii y se propone su inclusión en la sección Leianthae. Se provee una tabla comparativa con las especies de la sección y observaciones referidas a la especie más relacionada. Digitaria californica var. villosissima, D. corynotricha, D. curvinervis, D. fragilis y D. sacchariflora son citadas por primera vez en Colombia. Digitaria aequiglumis var. aequiglumis, D. argillacea var. nulliseta, D. ciliaris var. rhachiseta, D. costaricensis, D. eriantha, D. filiformis var. laeviglumis, D. lehmanniana var. dasyantha, D. parva, D. sacchariflora y D. ternata se mencionan por primera vez en Venezuela. Digitaria... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Colombia; Digitaria; Paniceae; Poaceae; Taxonomía; Venezuela. |
| Ano: 2005 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0011-67932005000100016 |
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| Vega,Andrea S.; Rúgolo de Agrasar,Zulma E.. |
| Se adicionan 10 nuevas citas: Digitaria abyssinica, D. aequiglumis var. aequiglumis, D. lanuginosa, D. nuda y D. venezuelae var. fendleri en Panamá; D. argillacea var. nulliseta y D. fuscescens en Honduras; D. sacchariflora en El Salvador y Guatemala; D. sanguinalis en Costa Rica; y D. similis en El Salvador, Guatemala y Panamá. Seis de estos taxones constituyen nuevas citas en América Central: D. aequiglumis var. aequiglumis, D. argillacea var. nulliseta, D. lanuginosa, D. sacchariflora, D. similis y D. venezuelae var. fendleri. Se excluyen cuatro especies de América Central. Se sinonimiza a Panicum gavanianum bajo Digitaria similis, nueva cita para Perú, y Digitaria clavitricha bajo D. venezuelae var. fendleri. Cuatro especies son ilustradas en forma... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: América Central; Digitaria; Paniceae; Poaceae; Taxonomía. |
| Ano: 2007 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0011-67932007000100010 |
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| Vieira, Viviane Cristina; Faculdade de Ciências Agrárias e Veterinárias/Universidade Estadual Paulista; Alves, Pedro Luís da Costa Aguiar; Faculdade de Ciências Agrárias e Veterinárias/Universidade Estadual Paulista; Picchi, Simone Cristina; Faculdade de Ciências Agrárias e Veterinárias/Universidade Estadual Paulista; Lemos, Manoel Victor Franco; Faculdade de Ciências Agrárias e Veterinárias/Universidade Estadual Paulista; Sena, Janete Apparecida Desidério; Faculdade de Ciências Agrárias e Veterinárias/Universidade Estadual Paulista. |
| Digitaria species are sugar cane crop weeds in Brazil and are being controlled with herbicides, although there are some reports of control failure, notably to the triazine group. Molecular techniques are recommended to analyze the genetic variability in weeds. RAPD (Random Amplified Polymorphic DNA), PCR-RFLP (Polymerase Chain Reaction – Restriction Fragment Length Polymorphism) and, in combination with sequencing, allow the localization of resistance genes, as well as possible mutations related to the onset of resistant individuals in some species. Thus, the objective of this work was to characterize ten accessions of Digitaria spp. by RAPD and PCR-RFLP markers, to sequence a conserved region of the psb A gene and evaluate the accessions response to... |
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Palavras-chave: Digitaria; PsbA gene; RAPD; Sequencing; Triazine; Weed Digitaria; PsbA gene; RAPD; Sequencing; Triazine; Weed. |
| Ano: 2010 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/3841 |
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| Oreja,Fernando H; Bastida,Fernando; Gonzalez-Andújar,José L. |
| A bioeconomic model was developed for decision-making regarding large crabgrass (Digitaria sanguinalis) control in glyphosate-resistant soybeans in the Rolling Pampas ofArgentina. The model was used to evaluate the economic returns of four different glyphosate-based strategies for weed control. In the absence of herbicide application (T1), the soil seed bank increases to an equilibrium density of 12,079 seeds m-2 in three years. A single herbicide application during the early stages of the crop (T2), which was intended to be highly effective in the control of an early weed cohort, allows a late, unaffected cohort to produce sufficient seeds to maintain population densities in the soil seed bank. A single, delayed herbicide application (T3), which was... |
| Tipo: Journal article |
Palavras-chave: Crop-weed competition; Digitaria; Herbicides; Glycine max; Large crabgrass; Sensitivity analysis; Transgenic crop. |
| Ano: 2012 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202012000200006 |
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