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.
1986
Authors
Lita Greve Fred MidtgaardAbstract
No abstract has been registered
Authors
Stein MagnesenAbstract
No abstract has been registered
Authors
Peter Mulock Erik ChristiansenAbstract
The spruce bark beetle, Ips typographus, was induced to attack Norway spruce by means of pheromone dispensers. The degree of attack on each tree was recorded and the trees were later categorized as surviving or dying, according to the degree of sapwood blue-staining caused by the attacks. A threshold of successful attack was observed; i.e. above a certain number of attacks the trees were successfully invaded by the beetles and their mutualistic blue-stain fungi. The height of this threshold increased with increasing tree vigour, measured as the relative increment of the sapwood cross-sectional area.
Authors
Kåre Olav VennAbstract
No abstract has been registered
1985
Authors
A. KrólAbstract
No abstract has been registered
Authors
Tore SkrøppaAbstract
No abstract has been registered
Authors
John Eilif Hermansen Bendict Faye Tore Corneliussen Johnny Hofsten Hans VenvikAbstract
The report is a conultancy for NORAD (Norwegian Agency for International Development) and Forest Division of the Tanzania Ministry of Lands, Natural Resources and Tourism. The report gives and overview over catcment forests i Tanzania, the Catchment Forestry Project and recommendation on catchment forest management.
Authors
Erik ChristiansenAbstract
When Norway spruce trees were inoculated with Ceratocystis polonica, a dose-dependent response was recorded. Local resinosis near the inoculation sites decreased with increasing inoculum density; parallelled by an increasing degree of sapwood staining, and tree mortality. Suppressed trees, and trees showing growth decline appeared more susceptible than trees suffering less competition.
Authors
Harald Bergseth Alhaji S. JengAbstract
No abstract has been registered
Abstract
No abstract has been registered