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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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1986

Lecture – Ongoing and planned studies on air pollution and forests in Norway

Richard Horntvedt

In: Fenger, J., L. Mortensen, & H. Ro-Poulsen (eds.): Air pollution and forests, pp. 125-129. Proceedings of a seminar in Copenhagen 21-22 October 1985, 1986.

Authors

Richard Horntvedt

Abstract

No abstract has been registered

Report – Predictable development of stocking of lodgepole pine in west-central Alberta after drag scarification

A.K. Hellum, G.H. Linfield

Meddelelser fra Norsk institutt for skogforskning, 39.7 1986. 113-127

Authors

A.K. Hellum G.H. Linfield

Abstract

No abstract has been registered

Report – Properties of various provenances of sitka spruce (Picea sitchensis Carr.) grown in Norway

Romanus C. Ishengoma, Ludvik Nagoda

Meddelelser fra Norsk institutt for skogforskning, 39.20 1986. 343-358

Authors

Romanus C. Ishengoma Ludvik Nagoda

Abstract

No abstract has been registered

Academic – Response in Ips typographus to logging waste odours and synthetic pheromones

Ø. Austarå, Alf Bakke, Fred Midtgaard

Journal of Applied Entomology (JAE), 101 1986. p. 194-198

To document

Authors

Ø. Austarå Alf Bakke Fred Midtgaard

Abstract

No abstract has been registered

Academic – Rooting of juvenile succulent cuttings from half-sib families of Picea abies

Øystein Johnsen

Scandinavian Journal of Forest Research, 1 1986. 27-36

Authors

Øystein Johnsen

Abstract

No abstract has been registered

Report – Sampling number of trees in regeneration

Tron Eid, Jo Heringstad, Sveinung Nersten

Meddelelser fra Norsk institutt for skogforskning, 39.12 1986. 215-232

Authors

Tron Eid Jo Heringstad Sveinung Nersten

Abstract

No abstract has been registered

Report – Some examples of bark deposition and utilization on forest land

Knut Solbraa

Meddelelser fra Norsk institutt for skogforskning, 39.9 1986. 147-159

Authors

Knut Solbraa

Abstract

No abstract has been registered

Report – Some observations in a provenance trial with Norway spruce in West Norway

Eivind Bauger, Arnstein Orlund

Meddelelser fra Norsk institutt for skogforskning, 39.16 1986. 283-294

Authors

Eivind Bauger Arnstein Orlund

Abstract

No abstract has been registered

Academic – Species of Ophiostomataceae isolated from Picea abies infested by the bark beetle Ips typographus

Halvor Solheim

Nordic Journal of Botany, 6(2) 1986. 199-207

Authors

Halvor Solheim

Abstract

No abstract has been registered

Academic – Starch reserves in Picea abies in relation to defence reaction against a bark beetle transmitted blue-stain fungus, Ceratocystis polonica

Erik Christiansen, Anders Ericsson

Canadian Journal of Forest Research, 16 1986. 78-83

Authors

Erik Christiansen Anders Ericsson

Abstract

Coniferous trees resist invasion of their phloem and xylem by microorganisms through an induced defence reaction; resin-filled reaction zones are formed around the infections to stop the intrusion. The efficacy of the reaction is supposedly dependent on an ample supply of carbohydrates. Two hypotheses were formulated: (i) phloem starch reserves are consumed by the defence reaction; (ii) trees low in phloem starch are vulnerable to infection. To test the hypotheses, stem sections of Picea abies trees were mass inoculated with a pathogenic blue-stain fungus, Ceratoscystis polonica, associated with the spruce bark beetle Ips typographus. Stem starch concentration was manipulated through girdling. Mass inoculation lead to a significant decrease in phloem starch concentration. Starch reserves of single trees were not correlated to their resistance to infection. Translocation capacity of the phloem is suggested critical for the defence reaction.

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