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.
2002
Authors
Arne Sandnes Halvor SolheimAbstract
Tree resistance to the patogenic blue stain fungus Ceratocystis polonica was studied in a monoclonal stand of Norway spruce (Picea abies [L] Karst.) in relation to tree social status and diameter at breast height (DBH). The DBH distribution of the 33-year-old stand ranged from 5 to 35 cm. There were clear differences in tree height between the suppressed (DBH 7.4-10.3 cm), co-dominant (DBH 11.8-17.4 cm) and dominant (DBH 18.6-23.9 cm) tree classes. The resistance was tested by mass inoculating trees with a low (400 inoculations m-2, 60 cm inoculation belt) or high (400 inoculations m-2, 120 cm inoculation belt) dosage. The small, suppressed trees were more susceptible to inoculation than the co-dominant and dominant trees, based on amount of blue-stained and occluded sapwood, lesion length, and dead cambium/phloem. A threshold in tree social status or tree size might be important in the overall resistance to fungal infection.
Authors
Grete Rasmussen Gunnar Fremmersvik Rolf Arnt OlsenAbstract
No abstract has been registered
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Authors
Wenche Dramstad Wendy Fjellstad Geir-Harald Strand Henrik Forsberg Mathiesen Gunnar Engan Jogeir N. StoklandAbstract
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Authors
Tore SkrøppaAbstract
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2001
Authors
Mehreteab TesfaiAbstract
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Authors
Mehreteab TesfaiAbstract
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Authors
John Palmer Mekjell Meland A Hann J.N WünscheAbstract
No abstract has been registered