Time filter

Source Type

Makri A.,Ministry of Rural Development and Food | Koutsouris A.,Agricultural University of Athens
Agricultural Economics Review | Year: 2015

The current paper aims at exploring innovation networking practices among the members of two Producer Groups (PGs) in Ierapetra area, Crete. Results show that the first PG's members are better incorporated in the PG's innovation network(s) as well as that its leaders are conceived of as innovators. On the contrary, the innovation network of the second PG is highly fragmented and dependent on the leaders of the first PG. These results have implications in terms of the PGs' innovation capacity as well as of extension work, especially with a view to current developments in both Greece and the EU. Source

Tsagkarakis A.E.,Agricultural University of Athens | Kalaitzaki A.P.,Ministry of Rural Development and Food | Lykouressis D.P.,Agricultural University of Athens
Phytoparasitica | Year: 2013

The relative abundance as well as the percentage of parasitism of Phyllocnistis citrella Stainton (Lepidoptera: Gracillariidae) and its parasitoids were studied in a citrus orchard with orange, mandarin and lemon trees in Greece. Infestation of P. citrella on each citrus host, as expressed by the number of mines per leaf, was significantly higher on lemon than on mandarin. The P. citrella parasitoid complex included the native species Neochrysocharis formosa and Pnigalio pectinicornis, as well as the introduced Citrostichus phyllocnistoides. The most abundant of those was N. formosa in all of the citrus species. The average percentage of parasitism was 13.1%, 13.8% and 11.7% on orange, mandarin and lemon, respectively. No significant differences in parasitism rate by each of the three parasitoid species separately were recorded among the three citrus species. © 2012 Springer Science + Business Media B.V. Source

Alexandridis A.,Technological Educational Institute of Athens | Russo L.,CNR Institute for Research on Combustion | Vakalis D.,Ministry of Rural Development and Food | Bafas G.V.,National Technical University of Athens | Siettos C.I.,National Technical University of Athens
International Journal of Wildland Fire | Year: 2011

We show how microscopic modelling techniques such as Cellular Automata linked with detailed geographical information systems (GIS) and meteorological data can be used to efficiently predict the evolution of fire fronts on mountainous and heterogeneous wild forest landscapes. In particular, we present a lattice-based dynamic model that includes various factors, ranging from landscape and earth statistics, attributes of vegetation and wind field data to the humidity of the fuel and the spotting transfer mechanism. We also attempt to model specific fire suppression tactics based on air tanker attacks utilising technical specifications as well as operational capabilities of the aircrafts. We use the detailed model to approximate the dynamics of a large-scale fire that broke out in a region on the west flank of the Greek National Park of Parnitha Mountain in June of 2007. The comparison between the simulation and the actual results showed that the proposed model predicts the fire-spread characteristics in an adequate manner. Finally, we discuss how such a detailed model can be exploited in order to design and develop, in a systematic way, fire risk management policies. © 2011 IAWF. Source

Dovas C.I.,Aristotle University of Thessaloniki | Papanastassopoulou M.,Aristotle University of Thessaloniki | Georgiadis M.P.,Aristotle University of Thessaloniki | Chatzinasiou E.,Aristotle University of Thessaloniki | And 2 more authors.
Applied and Environmental Microbiology | Year: 2010

Routes of avian influenza virus (AIV) dispersal among aquatic birds involve direct (bird-to-bird) and indirect (waterborne) transmission. The environmental persistence of H5N1 virus in natural water reservoirs can be assessed by isolation of virus in embryonated chicken eggs. Here we describe development and evaluation of a real-time quantitative reverse transcription (RT)-PCR (qRT-PCR) method for detection of H5N1 AIV in environmental water. This method is based on adsorption of virus particles to formalin-fixed erythrocytes, followed by qRT-PCR detection. The numbers of hemagglutinin RNA copies from H5N1 highly pathogenic AIV particles adsorbed to erythrocytes detected correlated highly with the infectious doses of the virus that were determined for three different types of artificially inoculated environmental water over a 17-day incubation period. The advantages of this method include detection and quantification of infectious H5N1 AIVs with a high level of sensitivity, a wide dynamic range, and reproducibility, as well as increased biosecurity. The lowest concentration of H5N1 virus that could be reproducibly detected was 0.91 50% egg Infective dose per ml. In addition, a virus with high virion stability (Tobacco mosaic virus) was used as an internal control to accurately monitor the efficiency of RNA purification, cDNA synthesis, and PCR amplification for each individual sample. This detection system could be useful for rapid high-throughput monitoring for the presence of H5N1 AIVs in environmental water and in studies designed to explore the viability and epidemiology of these viruses in different waterfowl ecosystems. The proposed method may also be adapted for detection of other AIVs and for assessment of their prevalence and distribution in environmental reservoirs. Copyright © 2010, American Society for Microbiology. All Rights Reserved. Source

Karagiannis I.,U.S. Center for Disease Control and Prevention | Mellou K.,U.S. Center for Disease Control and Prevention | Gkolfinopoulou K.,U.S. Center for Disease Control and Prevention | Dougas G.,U.S. Center for Disease Control and Prevention | And 4 more authors.
Eurosurveillance | Year: 2012

In spring 2008, the Hellenic Center for Disease Control and Prevention was notified about human brucellosis cases in Thassos, a Greek island that had been up to that point under a brucellosis eradication programme. Following the verification of the outbreak a 1:1 case- control study was conducted in the island. The study revealed that consumption of locally produced raw cheese was a risk factor for Brucella melitensis infection (odds ratio (OR): 15.1, 95% confidence interval (CI): 6.56-34.7). Brucella melitensis biotype 3 was identified in two clinical samples. As a result of the outbreak, the island is no longer officially considered as an area with farms free of brucellosis and is currently under a brucellosis control programme. The investigation of this outbreak demonstrated that control and eradication of brucellosis is not only a question of designing a strategy, but rather of ensuring its continuous, strict implementation. Furthermore, it revealed the lack of appropriate education of the public regarding the risks associated with raw, non heattreated cheese consumption. Source

Discover hidden collaborations