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| Registros recuperados: 51 | |
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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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| PENTEADO, S. do R. C.; OLIVEIRA, E. B. de; IEDE, E. T.. |
| Devido à grande ameaça que Sirex noctilio (vespa da madeira) representa para o setor florestal brasileiro, é de fundamental importância o monitoramento da praga. Para isto, torna-se necessária a definição de uma técnica de amostragem de danos, que leve em conta a grande extensão dos povoamentos de pinus, os de ataque da praga, a praticiade de aplicação de método e os custos da atividade. Neste trabalho foi desenvolvido um método de amostragem, no qual a amostra não tem tamanho fixo, sendo dimensionada à medida em que a amostragem vai sendo realizada, em função dos resultados obtidos. Através da utilização de uma tabela apropriada, pode-se verificar, rapidamente, a nível de campo, se o número de amostras é suficiente, ou se a amostragem deve continuar sendo... |
| Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) |
Palavras-chave: Monitoramento; Wood wasp; Damage; Espécie exótica.; Praga de planta; Amostragem; Dano; Praga; Sirex Noctilio; Vespa da Madeira.; Pinus; Monitoring; Pests; Sampling.. |
| Ano: 2002 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/306552 |
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| Jeannetaud, P; Krawczak, P; Bequignat, R; Pabiot, J; Bord, C; Vancon, M; Bard, M; Lemascon, A. |
| Fractography deals with the microscopic study of the fracture surfaces of a structure in order to define the initiation and the propagation of the damage and then the failure history of the structure (stress, environment ...). Today, we are able to identify the causes of the failure of metallic parts based on pictures of typical fracture surfaces, but there is nothing similar for composite materials. However, the increasing amount of literature devoted to fractography, as well as the constitution of "brain storming" groups on a European level confirm scientific interest in this fracture analysis mode that permits a better understanding of the existing relationship between the material's microscopic structure and its macroscopic mechanical behaviour. In... |
| Tipo: Text |
Palavras-chave: Fractures; Damage; Failures; Ship technology; Composite materials; Endommagement; Rupture; Défaillance; Analyse d'avaries; Fractographie. |
| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/1992/acte-1060.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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| OLIVEIRA, M. A. S.; FIALHO, J. de F.; ALVES, R. T.; OLIVEIRA, J. N. S.; GOMES, A. C.. |
| Este trabalho refere-se a dinamica populacional do percevejo-de-renda, Vatiga illudens (Drake, 1922) (Hemiptera: Tingidae) da mandioca (Manihot esculenta Crantz) no Distrito Federal no periodo de 1994 a 1997. Dentro da area util de parcela do experimento, foram efetuadas amostragens quinzenais durante o ciclo da cultura, utilizando-se da seguinte tecnica: de cada cinco plantas previamente marcadas, colhia-se uma folha e contava-se o numero de ninfas e adultos nela depositados. O nível de dano do percevejo-de- renda foi avaliado com base na ocorrencia dos sintomas do ataque dos insetos nas folhas das plantas em escala de notas crescentemente de 0 a 5. Os resultados mostram que as variedades mansas (Mantiqueira e Jacana) são as mais infestadas e as bravas... |
| Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) |
Palavras-chave: Percevejo-de-renda; Distrito Federal; Brasil; Damage; Savanna; Praga: Inseto.; Cerrado; Dinâmica Populacional; Inseto; Mandioca; Manihot Esculenta; Percevejo de Renda; Praga de Planta; Vatiga Illudens.; Insecta.. |
| Ano: 2001 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567068 |
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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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| 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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| Penteado, Susete do Rocio Chiarello; Carpanezzi, Aparecido Antonio; Neves, Edinelson José Maciel; Santos, Álvaro Figueredo dos; Flechtmann, Carlos Alberto Hector. |
| Este é o primeiro registro do ataque de besouros (Curculionidae, Scolitinae), no Brasil, causando danos em plantios de nim, entre 7 e 10 anos, em Brejinho de Nazaré, Tocantins, constado em junho de 2009. Os insetos foram identificados como, Xylosandrus compactus (Eichhoff), Cryptocarenus diadematus Eggers, 1937 e Hypothenemus sp. Westwood, 1836. Os plantios atacados apresentavam crescimento abaixo do esperado para a região, baixa produção de sementes, desfolhamento acentuado e rebrota intensa nos ramos, seguida por morte de brotos jovens e/ou do ápice do ramo. A ação dos insetos provocou pontos de exsudação intensa de goma nos orifícios provocados. O fato tem similaridade com a síndrome denominada “declínio do nim”, relatada na África.doi:... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Damage; Stress; Scolytinae; Ambrosia beetles; Azadirachta Danos; Estresse; Scolytinae; Besouros da ambrosia; Azadirachta.. |
| Ano: 2011 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/179 |
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| Ramírez Delgadillo, Juan José. |
| La pitahaya es una cactácea que se cultiva en zonas con clima tropical, subtropical o semiárido de México. Tres especies tienen importancia económica como frutales. En Tepoztlán, Morelos, se encontraron plantas con síntomas causados por patógenos y daño por insectos. Debido a la importancia actual y potencial del cultivo y la incidencia de plagas y patógenos, se realizó el presente estudio con el objetivo de identificar taxonómicamente y describir daños de los principales agentes fitosanitarios asociados Hylocereus spp. Durante 2006-2008 se recolectaron mensualmente estructuras vegetativas y reproductoras dañadas; de 2007-2010 se aislaron e identificaron microorganismos (22± 1.5°C) e insectos (25 ± 1.5°C, 45 % HR y fotoperiodo 14:10) en laboratorio. En... |
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Palavras-chave: Plagas; Fitopatógenos; Taxonomía; Daños; Insectos; Hongos; Pitahaya; Pests; Phytopathogens; Taxonomy; Damage; Insects; Fungus; Doctorado; Fitopatología. |
| Ano: 2011 |
URL: http://hdl.handle.net/10521/356 |
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| Paiva,Paulo Eduardo Branco; Parra,José Roberto Postali. |
| This study evaluated the effect of initial pH values of 4.5, 6.5 and 8.5 of the attractant (protein bait) Milhocina® and borax (sodium borate) in the field, on the capture of fruit flies in McPhail traps, using 1, 2, 4 and 8 traps per hectare, in order to estimate control thresholds in a Hamlin orange grove in the central region of the state of São Paulo. The most abundant fruit fly species was Ceratitis capitata, comprising almost 99% of the fruit flies captured, of which 80% were females. The largest captures of C. capitata were found in traps baited with Milhocina® and borax at pH 8.5. Captures per trap for the four densities were similar, indicating that the population can be estimated with one trap per hectare in areas with high populations. It was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: True fruit flies; Protein bait; Damage; IPM; Citros. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452013000200015 |
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| Registros recuperados: 51 | |
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