Publications
NIBIOs employees contribute to several hundred scientific articles and research reports every year. You can browse or search in our collection which contains references and links to these publications as well as other research and dissemination activities. The collection is continously updated with new and historical material.
2012
Authors
Tatsiana Espevig Arne Tronsmo Linda Hjeljord Bingru R. Huang C Xu M. DaCosta B.B. Clarke Anne Marte Tronsmo Trygve S. AamlidAbstract
No abstract has been registered
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Authors
John Morken Tormod Briseid Zehra ZenginAbstract
No abstract has been registered
Authors
Paul Eric AspholmAbstract
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Authors
Mette ThomsenAbstract
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Authors
Atle Wibe Ilze Apenite Catherine A Baroffio Anna-Karin Borg-Karlson Jerry Cross David Richard Hall Lene Sigsgaard Nina TrandemAbstract
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Authors
Atle Wibe Ilze Apenite Catherine A Baroffio Anna-Karin Borg-Karlson Jerry Cross David Richard Hall Lene Sigsgaard Nina TrandemAbstract
No abstract has been registered
Abstract
In 2008, an epidemic caused by a new Neonectria sp. was discovered on white fir (Abies concolor) in several counties in southern Norway [1]. Later the pathogen was also found on other fir species in Norway and Denmark [2]. Typical symptoms and signs were dead shoots, flagging (dead branches), canker wounds, heavy resin flow, and occasionally red fruiting bodies (perithecia). Pathogenicity tests on several Abies spp. proved the fungus to be very aggressive, which corresponds well with observations of mortality of white fir and subalpine fir (A. lasiocarpa) from different age classes under field conditions. Sequencing of the internal transcribed regions (ITS) of the ribosomal DNA showed that this Neonectria sp. was most similar to N. ditissima (only 5 bp different from isolates in the GenBank), a common pathogen worldwide on broad leaf trees. The ITS sequences were very different (> 20 bp) from N. fuckeliana, a well-known fungus on Norway spruce in Scandinavia and other parts of the world, especially in the northern hemisphere. In 2011, the new Neonectria species was found on diseased trees in a Danish nordmann fir (Abies nordmanniana) seed orchard. Resin flow was seen from mature cones, and tests revealed that the seeds were infected by the Neonectria sp.
Abstract
No abstract has been registered