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| Registros recuperados: 51 | |
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| Rivera Jiménez, Mally Naty. |
| Con el objetivo de estudiar la marchitez del chile Poblano, se colectaron plantas y frutos con síntomas de esta enfermedad en tres localidades de San Martín Texmelucan, Puebla. Durante el ciclo P/V 2007 se evaluaron 5 tratamientos: Glomus intrarradix, Bat Guano, Agrohomeopatía, Control químico tradicional y testigos, como alternativas para reducir el daño causado por los patógenos. De este experimento se aislaron de la base del tallo y cuello de la raíz, cepas patogénicas las cuales se identificaron mediante estudios filogenéticos y morfológicos como Fusarium oxysporum y F. solani species complexes. Mediante microscopía de luz se observó que estos aislamientos causaron daño a nivel histológico en epidermis, parénquima, endodermis y sistema vascular... |
| Tipo: Tesis |
Palavras-chave: Histopatología; Marchitez; Oomycetos; Transmisión; Doctorado; Producción de Semillas; Histopathology; Wilt disease; Oomycetes; Transmission. |
| Ano: 2009 |
URL: http://hdl.handle.net/10521/1302 |
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| Reyes Osornio, Maribel. |
| De huertas comerciales de mango de Guerrero y Michoacán, México, se colectaron trips por muestreo aleatorio de árboles para identificación de especies, determinar su relación forética con Fusarium spp., transmisión de estos hongos, agentes causales de malformación vegetativa y floral de mango, y fundación de colonias de trips en condiciones asépticas en cámaras bioclimáticas. Se obtuvieron ejemplares de trips pertenecientes a dos géneros y 11 especies, siete pertenecientes a Scirtothrips y cuatro a Frankliniella. Los trips fueron recolectados detejidos vegetativos y florales, asintomáticos o malformados. Se reporta por primera vez a F. difficilis, F. occidentalis, F. gardeniae, F. minor, S. bisbravoae y S. silvicola asociados al cultivo de mango en... |
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Palavras-chave: Fusarium; Trips; Transmisión; Foresia; Frankliniella; Scirtothrips; Thrips; Transmission; Phoresy; Fitopatología; Doctorado. |
| Ano: 2013 |
URL: http://hdl.handle.net/10521/2083 |
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| Kastberg, Peter; Aarhus University, Business and Social Sciences, Business Communication; pk@asb.dk. |
| The market for organic foods is growing, however, the proportion of consumers buying organic foods is still considered low. Research shows that a significant barrier to consumers purchasing more organic foods is lack of information. This leads the relevant body of research to call for better communication around organic foods. The same body of research, however, neither questions what good communication surrounding organic foods is, nor what would make it better. Applying the communication theoretical formats of transmission, interaction, and coaction, respectively, onto instances of organic communication activities, I will discuss to what extent each format encourages consumer participation and learning. Transmission, typically in the form of monologuous... |
| Tipo: Peer-Reviewed Insight |
Palavras-chave: Coaction; Communication; Interaction; Knowledge communication; Transmission. |
| Ano: 2015 |
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| Prunier, Jérôme G.; Saint‐pé, Keoni; Blanchet, Simon; Loot, Géraldine; Rey, Olivier. |
| Inferring parameters related to the aggregation pattern of parasites and to their dispersal propensity are important for predicting their ecological consequences and evolutionary potential. Nonetheless, it is notoriously difficult to infer these parameters from wildlife parasites given the difficulty in tracking these organisms. Molecular‐based inferences constitute a promising approach that has yet rarely been applied in the wild. Here, we combined several population genetic analyses including sibship reconstruction to document the genetic structure, patterns of sibship aggregation, and the dispersal dynamics of a non‐native parasite of fish, the freshwater copepod ectoparasite Tracheliastes polycolpus. We collected parasites according to a hierarchical... |
| Tipo: Text |
Palavras-chave: Full‐sibs; Genetic structure; Parasite dispersal; Parentage analysis; Tracheliastes polycolpus; Transmission. |
| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00693/80499/83694.pdf |
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| Lallias, Delphine; Arzul, Isabelle; Heurtebise, Serge; Ferrand, Sylvie; Chollet, Bruno; Robert, Maeva; Beaumon, Andy; Boudry, Pierre; Morga, Benjamin; Lapegue, Sylvie. |
| Bonamiosis is a parasitic disease (causative agent: Bonamia ostreae) affecting the European flat oyster Ostrea edulis, responsible for a drastic decline in its aquaculture production. Selective breeding programs for resistance to bonamiosis have been undertaken to counter this disease. In the present study, a 6-month cohabitation challenge experiment was performed in order to transmit the disease from wild oysters injected with the parasite to two tested families of oysters (20 and 8-month old at the beginning of the experiment, with different genetic backgrounds) originating from a selective breeding program developed by IFREMER in France. Mortalities were checked daily and ventricular heart smears were performed on dying or moribund oysters to detect the... |
| Tipo: Text |
Palavras-chave: Heart smear; Transmission; Cohabitation experiment; Bonamia ostreae; Ostrea edulis. |
| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/2008/publication-4783.pdf |
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| Arzul, Isabelle; Renault, Tristan; Lipart, Cécile; Davison, Andrew. |
| Since 1991, numerous herpesvirus infections associated with high mortality have been reported around the world in various marine bivalve species. In order to determine whether these infections are due to ostreid herpesvirus-l (OsHV1), a previously characterized pathogen of the Japanese oyster (Crassostrea gigas), PCR analysis was carried out on 30 samples of larvae collected from four bivalve species (C. gigas, Ostrea edulis, Ruditapes decussatus and Ruditapes philippinarum), most exhibiting mortality prior to collection. All samples were shown to be infected by OsHV1. Viral genomes in three samples of C. gigas and three of R. philippinarum that originated from the same hatchery were unusual in bearing a deletion of at least 2.8 kbp in an inverted repeat... |
| Tipo: Text |
Palavras-chave: Bivalve; Crassostrea gigas; Herpesvirus; Japanese oyster; Transmission. |
| Ano: 2001 |
URL: http://archimer.ifremer.fr/doc/2001/publication-705.pdf |
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| Lallias, Delphine; Arzul, Isabelle; Heurtebise, Serge; Ferrand, Sylvie; Chollet, Bruno; Robert, Maeva; Beaumont, Andrew; Boudry, Pierre; Morga, Benjamin; Lapegue, Sylvie. |
| Bonamiosis is a parasitic disease (causative agent: Bonamia ostreae) affecting the European flat oyster Ostrea edulis, responsible for a drastic decline in the aquaculture production of this oyster species. Therefore a selective breeding program for resistance to bonamiosis has been undertaken since 1985 bu Ifremer, leading to the production of several selected oyster families. In the present study, a 6-month cohabitation challenge experiment was performed in order to transmit the disease from wild oysters (injected with the parasite) to two tested families of oysters originating from the selective breeding program. Mortalities were checked daily, and ventricular heart smears were performed on dying or moribund oysters to detect the level of infection to... |
| Tipo: Text |
Palavras-chave: Heart smear; Transmission; Cohabitation experiment; Bonamia ostreae; Ostrea edulis. |
| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/2008/acte-4535.pdf |
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| Arzul, Isabelle. |
| Since 1991, high mortality rates of larvae and juveniles of different bivalve mollusc species associated with herpesvirus infections have been reported in different countries. The aim of this study was to determine if more than one helpesvirus species was responsible for these infections or just one species exhibiting polymorphism. The investigations concentrated on the analysis of the virus genome, studies of virus transmission in different mollusc species and on the potential role of bivalve adults in the occurrence of infections. The analysis of various target sequences within the virus genome present in infected larvae samples demonstrated the presence of polymorphism. More notably a variant of the virus was identified and the variation appears... |
| Tipo: Text |
Palavras-chave: Herpèsvirus; Bivalves; Transmission; Polymorphisme; OsHV-1; Diagnostic; Herpesviruses; Bivalvia; Transmission; Polymorphism; OsHV-1; Diagnostic. |
| Ano: 2001 |
URL: http://archimer.ifremer.fr/doc/00105/21675/19253.pdf |
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| Peeler, Edmund J.; Oidtmann, Birgit C.; Midtlyng, Paul J.; Miossec, Laurence; Gozlan, Rodolphe E.. |
| In this paper it is argued, using examples of disease emergence in aquatic animals in Europe, that the introduction of non-native species drives disease emergence by both extending the geographic range of parasites and pathogens and facilitating host-switching. Enteric red mouth disease and infectious haematopoietic necrosis of salmonids have extended their geographic range from North America to Europe with the import of live fish (Pimephales promelas) and rainbow trout eggs, respectively. Host-switching results in disease emergence when previously unidentified commensal organisms or known pathogen switch to new naïve hosts. The most serious endemic diseases of wild aquatic animals in Europe in recent years can be traced to the introduction of non-native... |
| Tipo: Text |
Palavras-chave: Aquaculture; Transmission; Control; Pathways; Virulence; Fish. |
| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00033/14431/14066.pdf |
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| Registros recuperados: 51 | |
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