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| Registros recuperados: 51 | |
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| Alcántara Jiménez, José Ángel. |
| Polyphagotarsonemus latus es una especie cosmopolita que afecta diferentes cultivos tanto en áreas templadas como tropicales. El principal daño ocasionado por esta especie es la reducción o deformación de hojas jóvenes, brotes, frutos y flores. En papayo, el daño en hojas causado por este ácaro es conocido como "mano de chango" porque el área foliar de las hojas de papayo se reduce casi hasta las nervaduras, simulando los dedos de un mono. Este daño es similar al causado por Papaya Ringspot Virus (PRSV-P). Debido a que P. latus y PRSV-P causan daños similares a las hojas de papayo, el objetivo general de esta investigación fue estudiar la relación que existe entre el ácaro P. latus y PRSV-P en la reducción foliar de Carica papaya cv Maradol roja. Tres... |
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Palavras-chave: Papayo; Area foliar; Síntomas; Relación ácaro-virus; Leaf area; Damage; Virus-mite relationship; Doctorado; Fruticultlura. |
| Ano: 2010 |
URL: http://hdl.handle.net/10521/238 |
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| Alcántara Jiménez, José Angel. |
| Polyphagotarsonemus latus es una especie cosmopolita que afecta diferentes cultivos tanto en áreas templadas como tropicales. El principal daño ocasionado por esta especie es la reducción o deformación de hojas jóvenes, brotes, frutos y flores. En papayo, el daño en hojas causado por este ácaro es conocido como "mano de chango" porque el área foliar de las hojas de papayo se reduce casi hasta las nervaduras, simulando los dedos de un mono. Este daño es similar al causado por Papaya Ringspot Virus (PRSV-P). Debido a que P. latus y PRSV-P causan daños similares a las hojas de papayo, el objetivo general de esta investigación fue estudiar la relación que existe entre el ácaro P. latus y PRSV-P en la reducción foliar de Carica papaya cv Maradol roja. Tres... |
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Palavras-chave: Papayo; Area foliar; Síntomas; Relación ácaro-virus; Leaf area; Damage; Virus-mite relationship; Doctorado; Fruticultlura. |
| Ano: 2010 |
URL: http://hdl.handle.net/10521/238 |
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| Barnouin, Bruno; Renaud, P. |
| The main conclusions drawn from examinations made by an expert over the last twelve years on boats in the Bay of Arcachon, including both motor and sailing boats, are presented. The different types of damage most frequently observed in different areas of the boats are described, with distinctions made between superstructures, areas below the water-line and other components. The damage is defined, common repair methods are described and simple design modifications to avoid the problems are discussed. In conclusion, it is apparent that the problems related specifically to aging of the material are rare or very rare. With improved fabrication methods and mastery of the design process in-service experience fully justifies the position of composite materials as... |
| Tipo: Text |
Palavras-chave: Motor boats; Inspection; Accidents; Yachts; Damage; Ship technology; Composite materials; Plaisance; Réparation; Accident; Dommage; Avarie. |
| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/1992/acte-1066.pdf |
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| Bordin,Luiz Carlos; Casa,Ricardo Trezi; Marcuzzo,Leandro Luiz; Reis,Erlei Melo; Gheller,André; Zancan,Rômulo Luís; Fingstag,Maiquiel Diego. |
| ABSTRACT: The occurrence of leaf spots in irrigated rice can reduce the yield and compromise the quality of the grain. However it is unknown the economic damage threshold (EDT) that these spots cause the yield of crop. The objective of this study was to obtain damage functions for models of critical, to relate damage by simultaneous occurrence of blast, brown spot and scald spot with grain yield harvests in 2011/12 and 2012/2013, in Rio do Oeste, Santa Catarina State, Brazil. Gradient of diseases intensity was generated by number of applications and fungicides rates. Design was a randomized block with four replications and six treatments consisting of mixing fungicide applications of triazole (difenoconazole) and strobilurin (azoxystrobin). In 2011/12 and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oryza sativa; Pyricularia oryzae; Bipolaris oryzae; Gerlachia oryzae; Damage. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000100007 |
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| Davies, Peter. |
| This paper describes the influence of seawater ageing on composites used in a range of marine structures, from boats to tidal turbines. Accounting for environmental degradation is an essential element in the multi-scale modelling of composite materials but it requires reliable test data input. The traditional approach to account for ageing effects, based on testing samples after immersion for different periods, is evolving towards coupled studies involving strong interactions between water diffusion and mechanical loading. These can provide a more realistic estimation of long-term behaviour but still require some form of acceleration if useful data, for 20 year lifetimes or more, are to be obtained in a reasonable time. In order to validate extrapolations... |
| Tipo: Text |
Palavras-chave: Seawater; Immersion; Durability; Damage; Coupling. |
| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00340/45167/44603.pdf |
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| Davies, Peter; Choqueuse, Dominique; Bourbouze, G.. |
| Although X-radiography has been widely used in studies of damage in composite materials, micro-tomography has received less attention, due to the high cost and limited availability of equipment. However, micro-tomographic analysis is a powerful tool, allowing 3D images of sections through sandwich materials to be obtained without specimen preparation. Four examples from a recent study are presented here, which show how micro-tomography can provide unique information on the quality of honeycomb sandwich structures, information on damage mechanisms and internal details of through thickness reinforcement in pinned foam cores. |
| Tipo: Text |
Palavras-chave: Inspection; Adhesive; Meniscus; Pins; Damage. |
| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00029/14061/11311.pdf |
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| Duchini,Paulo Gonçalves; Echeverria,Joilson Roda; Américo,Luana Fidelis; Guzatti,Gabriela Cristina; Cherman,Mariana Alejandra; Sbrissia,André Fischer. |
| ABSTRACT: Cyclocephala flavipennis Arrow, 1914 (Coleoptera: Melolonthidae), popularly known as white grub, is an insect widely disseminated in the South Region of Brazil. Despite the frequent occurrence of this white grub in areas cultivated with winter cereals, it is generally not considered a pest, since it feeds on straw and dead plant material. However, in 2015 and 2016, this insect has been identified as the damage-causing agent in the perennial winter pastures in Lages, Santa Catarina, Brazil. Damage was observed in patches and caused reduction in root depth and mass, resulting in loss of vigor, accelerated senescence in aerial parts, and death of tillers in Festuca arundinacea Schreb. and Dactylis glomerata L. plants. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Damage; Dynastinae; Grass; Pest; Santa Catarina. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000500153 |
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| Duncker, Philipp; Albert-Ludwigs-University Freiburg, Institute for Forest Growth;; Gardiner, Barry; Forest Research, Northern Research Station;; Grodzki, Wojciech; Forest Research Institute, Department of Forest Management in Mountain Regions;; Langstrom, Bo; The Swedish University of Agricultural Sciences, Department of Ecology;; Netherer, Sigrid; University of Natural Resources and Life Sciences, Department of Forest and Soil Sciences, Institute of Forest Entomology, Forest Pathology, and Forest Protection;; Nicoll, Bruce; Forest Research, Northern Research Station;; Orazio, Christophe; IEFC - EFI Atlantic;; Schelhaas, Mart-Jan; Centre for Ecosystem Studies, Alterra;; Tojic, Karl; Albert-Ludwigs-University Freiburg, Institute for Forest Growth;. |
| Due to climate change, forests are likely to face new hazards, which may require adaptation of our existing silvicultural practices. However, it is difficult to imagine a forest management approach that can simultaneously minimize all risks of damage. Multicriteria decision analysis (MCDA) has been developed to help decision makers choose between actions that require reaching a compromise among criteria of different weights. We adapted this method and produced a multicriteria risk analysis (MCRA) to compare the risk of damage associated with various forest management systems with a range of management intensity. The objective was to evaluate the effect of four forest management alternatives (FMAs) (i.e., close to nature, extensive management with combined... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Abiotic; Biotic; Damage; Hazard; MCRA; Silviculture. |
| Ano: 2012 |
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| Figueroa-Brito,Rodolfo; Villa-Ayala,Patricia; López-Olguín,Jesús F; Huerta-de la Peña,Arturo; Pacheco-Aguilar,Juan R; Ramos-López,Miguel A. |
| R. Figueroa-Brito, P. Villa-Ayala, J.F. López-Olguín, A. Huerta-de la Pena, J.R. Pacheco-Aguilar, and M.A. Ramos-López. 2013. Nitrogen fertilization sources and insecticidal activity of aqueous seeds extract of Carica papaya against Spodoptera frugiperda in maize. Cien. Inv. Agr. 40(3): 567-577. The damage caused by the fall armyworm Spodoptera frugiperda Smith (Lepidoptera: Noctuidae) to vegetative-stage maize cultivated with chemical nitrogen fertilizers, vermicompost, and Carica papaya L. (Caricaceae) seed extract was estimated. Each shoot was infested with one first instar larva of S. frugiperda. The variables measured included the percentage of germination, length of the second and fifth leaves, stem diameter and plant height, and the estimation of... |
| Tipo: Journal article |
Palavras-chave: Aqueous extract; Caricaceae; Chemical fertilizers; Damage; Fall armyworm; Spodoptera frugiperda. |
| Ano: 2013 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202013000300009 |
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| Flechtmann,Carlos A.H.; Ottati,Angelo L.T.. |
| We report for the first time the attack of the walking stick Tetanorhynchus leonardosi (Mello-Leitão) (Orthoptera: Proscopiidae) on young eucalyptus, Eucalyptus urophylla, in Brazil. The upper third of the trees was attacked (apical meristems and new leaves). During the hottest hours of the day the insects were found sheltered between leaves on the median third of the plants, and feeding when temperatures were milder. The attack was heterogeneous in the stand, being more concentrated when it was neighbouring an area of native 'Cerrado' vegetation. Mean defoliation was 5.8%, with an average of 5.2% of plants with apical meristems cut by the walking sticks. An application of Methyl Parathion was not effective against the pest. Apparently plants older than 6... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Insecta; Damage; Dispersion; Walking stick. |
| Ano: 1997 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0301-80591997000300027 |
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| Registros recuperados: 51 | |
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