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| Registros recuperados: 51 | |
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| Maurin, Romain; Baley, Christophe; Cartie, Denis D. R.; Davies, Peter. |
| This paper describes results from tests to examine the influence of through-thickness pinning on in-plane shear behaviour, measured by tensile loading of +/- 45A degrees specimens. Samples were produced by both aeronautical and marine manufacturing processes. As few previous studies have investigated pinning of marine composites these were also subjected to out-of-plane shear delamination tests. For both carbon/epoxy laminates the pins reduce the apparent in-plane shear modulus and strength. Pins modify the strain field measured by full-field image analysis, and slow damage development. A new damage mechanism, transverse pin cracking, was observed. |
| Tipo: Text |
Palavras-chave: Z-pinning; Shear; Mode II; Damage; Acoustic emission. |
| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00113/22390/20186.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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| 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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| Silva,Diego MN; Oliveira,Fábio L; Dalvi,Leandro P; Pratissoli,Dirceu; Erlacher,Wellington A; Quaresma,Mateus AL. |
| This research aimed to catalog insects that cause injury to the yacon (Smallanthus sonchifolius, família Asteraceae) crop, in order to identify those who may cause damage. The study was carried out in Alegre, Espírito Santo State, Brazil. Cultivation began in May 2013 and the harvest was done 180 days later. Three species from the Coleoptera order: Lagria villosa (Coleoptera: Lagriidae); Cerotoma arcuata and Diabrotica speciosa (Coleoptera: Chrysomelidae) and two species from the Lepidoptera order: Spodoptera eridania (Lepidoptera: Noctuidae) and Chlosyne lacinia saundersii (Lepidoptera: Nymphalidae) were observed causing damage to the yacon crop. The caterpillar C. lacinia saundersii, known as sunflower caterpillar, was the most important species, being... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Smallanthus sonchifolius; Damage; Pest management. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362015000300394 |
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| LORDELLO,RUBENS RODOLFO ALBUQUERQUE; LORDELLO,ANA INES LUCENA; GODOY,IGNÁCIO JOSÉ DE. |
| The root-knot nematode Meloidogyne javanica (Treub, 1885) Chitwood, 1949, was identified in roots, nodules and shells of peanut plants (Arachis hypogaea L.), cv. Florman-INTA, collected from a field in Menno colony, Chaco Central region of Paraguay. Infected plants were observed in patches, showing wilting and drying of vegetative parts. Peanut had been grown ininterruptly for many years in the same area and patches had already been observed in the preceding year in cv. Starr. Nematodes collected from roots in this field reproduced on tomato cultivar rutgers and peanut cultivar florunner and produced egg-masses on roots, nodules and shells of cultivar Florman. This is the first report on M. javanica parasiting peanut in Paraguay. |
| Tipo: Info:eu-repo/semantics/report |
Palavras-chave: Root-knot nematode; Meloidogyne javanica; Peanut; Arachis hypogaea; Occurrence; Damage; Host; Nodules; Shells; Meloidogyne javanica; Arachis hypogaea. |
| Ano: 1997 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051997000100009 |
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| Rodríguez,Isaura Viviana; Mesa-Cobo,Nora Cristina; Valencia,Milton Orlando; Ossa,Julián. |
| Abstract Polyphagotarsonemus latus is one a major pest of Valencia orange in Colombia. To study its biology, it was established an experiment on young leaves of the Valencia orange at 25 ± 5°C, 70 ± 5% RH, and 12:12 L:D photoperiod. To characterize the nature of damage caused by this mite on leaves and young fruits, a trial in screenhouse conditions using young leaf and small fruits (0.1 - 0.3 cm in diameter) and fruits between 1.0-3.0 cm in diameter, which were infested with 5, 15 and 30 adult females of P. latus, was established. The total duration of life cycle was 3.2 days; the female had an oviposition period of 7.4 days and longevity 9.6 days. Life table parameters were as follows: net reproductive rate (R o ) = 93.3, intrinsic rate of natural... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Broad mite; Biology; Infestation levels; Damage; Colombia. |
| Ano: 2017 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122017000400633 |
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| SANTOS, R. S. S. dos. |
| Drosophila suzukii é uma das mais importantes pragas de pequenos frutos em todo o mundo. A espécie possui a habilidade de inserir seus ovos em frutos que ainda estão em desenvolvimento nas plantas, ocasionando danos severos que podem comprometer toda a produção. Os cultivos mais atacados são aqueles que apresentam frutos com a epiderme fina, os quais oferecem pouca resistência à penetração do ovipositor da fêmea, como encontrado em amora-preta, cereja, framboesa, mirtilo, morango, entre outros. Neste documento estão apresentadas as características morfológicas da praga, que permitem sua identificação, os danos ocasionados nas frutas hospedeiras, assim como as principais técnicas disponíveis para atingir a maior eficiência de controle das populações. Além... |
| Tipo: Comunicado Técnico (INFOTECA-E) |
Palavras-chave: Spotted wing drosophila; Damage; Management; Control; Gerenciamento; Danos; Controle; Hospedeiros; Hosts Management; Drosofila da Asa Manchada (DAM); Hosts. |
| Ano: 2020 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1123407 |
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| Sèbe, Maxime; Kontovas, Christos A.; Pendleton, Linwood. |
| Collisions between ships and whales raise environmental, safety, and economic concerns. The management of whale-ship collisions, however, lacks a holistic approach, unlike the management of other types of wildlife-vehicle collisions, which have been more standardized for several years now. In particular, safety and economic factors are routinely omitted in the assessment of proposed mitigation solutions to ship strikes, possibly leading to under-compliance and a lack of acceptance from the stakeholders. In this study, we estimate the probability of ship damage due to a whale-ship collision. While the probability of damage is low, the costs could be important, suggesting that property damages are significant enough to be taken into consideration when... |
| Tipo: Text |
Palavras-chave: Whale-ship collision; Damage; Cost; FSA; Wildlife-vehicle collision; Risk assessment. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00601/71327/69757.pdf |
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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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| Registros recuperados: 51 | |
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