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.

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1991

Lecture – List of long term forest damage research sites

Mette Goul Thomsen

In: Interim Report of Cause-Effect Relationships in Forest Decline. Convention on Long-Range Transboundary Air Pollution. International Cooperative Programme on Assessment and Monitoring of Air Pollution Effects on Forests, pp. 145-225. Prepared for the Programme Coordinating Centres with the assistance of the United Nations Environment Programme (UNEP) and the Secretariat of the United Nations Economic Council for Europe. Global Environment Monitoring System 1991, 1991.

Authors

Mette Goul Thomsen

Abstract

No abstract has been registered

Doctoral dissertation – Occurrence, pathogenicity and transmission of seed-borne fungi on grasses in Norway

Guro Brodal

Norges landbrukshøgskole, 1991. 147 p.

Authors

Guro Brodal

Abstract

No abstract has been registered

Academic – Oxygen deficiency and spruce resin inhibition of growth of fungi associated with Ips typographus

Halvor Solheim

Mycological Research, 95 1991. 1387-1392

Authors

Halvor Solheim

Abstract

The Eurasian sprucc bark beetle, Ips typogaphus carries spores of several fungi induding Ophiostoma bicolor, O. pellicillatum and O. polonicum. However, after attack on Norway spruce trees O. polonicum is the pioneer invader of the sapwood while other species follow. To determine the causes behind this distinct succession experiments were performed comparing growth rate, tolerance to oxygen-deficient conditions and to spruce resin between these early invaders. In sealed tubes with limited oxygen. O. polonicum grew for a longer time than three other species regularly associated with I. typagraphus in Norway. The non-volatile components of lesion resin induced by fungal attack, as opposed to preformed resin, inhihited the growth of all species, but partirularly O. polonicum. O. polonicum grew rapidly on malt agar, but not faster than some of the other species associated with I. typographus. It is concluded that rapid growth and the abilily lo tolerate low oxygen pressure are important attributes for primary invaders, allowing tree resistance mechanisms to be overcome following mass inoculation.

Report – Pathogenicity of Ophiostoma polonicum to Norway spruce. The effect of isolate age and inoculum dose

Richard Horntvedt, Halvor Solheim

Meddelelser fra Skogforsk, (44.4) 1991. 11 p.

To document

Authors

Richard Horntvedt Halvor Solheim

Abstract

No abstract has been registered

Report – Physiology of plant survival under cold conditions, with particular reference to dark respiration as a factor limiting growth at timberline. A literature review

Oddvar Skre

Meddelelser fra Skogforsk, 44.1 1991. 34 s.

Authors

Oddvar Skre

Abstract

Support is given for the dark respiration as a limiting factor for growth at low temperatures. The existence of a so-called alternative respiration that is not linked to the growth process, supports this hypothesis, because of its possible function as a stabilizing factor (overflow function). Physiological mechanisms influencing plant survival in a cold environment and tree-line forming processes are discussed.

Academic – Planting stock quality: A proposal for better terminology

Bjørn Langerud

Scandinavian Journal of Forest Research, 6 1991. 49-51

Authors

Bjørn Langerud

Abstract

No abstract has been registered

Report – Reduced rates of teflubenzuron and their effect on grasshoppers (Acridoidea) and non-target arthropods in Mali

Paal Krokene

Universitetet i Oslo, 1991. 49 s.

Authors

Paal Krokene

Abstract

No abstract has been registered

Academic – Root damage to Norway spruce seedlings: Effects on root growth capacity, shoot growth capacity and transpiration

Bjørn Langerud, Martin Sandvik

Scandinavian Journal of Forest Research, 6 1991. 387-394

Authors

Bjørn Langerud Martin Sandvik

Abstract

No abstract has been registered

Report – SATELITTOVERVÅKING. Forsøk med kartlegging av høstpløying fra satellitt. Jordforsk-rapport

Arne Grønlund, Rune Solberg

, (5.23.25) 1991.

Authors

Arne Grønlund Rune Solberg

Abstract

No abstract has been registered

Academic – Summary of main topic and conclusions from the meeting: Biological systems in tree breeding

Hans Roulund, Tore Skrøppa

Silva Fennica, 25 1991. p. 199-200

Authors

Hans Roulund Tore Skrøppa

Abstract

No abstract has been registered

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