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.
1990
Authors
Dan AamlidAbstract
No abstract has been registered
Authors
Malcolm M. Furniss Halvor Solheim Erik ChristiansenAbstract
Spores characteristic of the tree pathogenic blue-stain fungus, Ophiostoma polonicum Siemasko, and other fungi are visible in scanning electron micrographs of pits on the pronotum and elytra of Ips typographus (L.). Inoculation and reisolation experiments showed that O. polonicum was transmitted to logs of generally higher frequencies by live beetles and their excised parts (head, prothorax, or elytra) than by the digestive tract. Other associated fungi isolated at high frequencies from I . typographus were O. bicolor Davidson Wells, O. penicillatum (Grosmann) Siemasko, Graphium sp., and yeasts.
Authors
Leiv M. Mortensen Oddvar SkreAbstract
Seedlings of Betula Pubescens, B. verrucosa and Alnus Incana were grown for 50 days in growth chambers at four ozone concentrations for 7 hr per day. Shoot and root dry weight decreased almost linearly with increasing ozone concentration in the three species. Shoot/root and leaf/stem dry weight werealmost unaffected by the treatment, while leaf senescence was significantly enhanced. Visible injury was observed at 53 nl per l and above.
Authors
Tore SkrøppaAbstract
No abstract has been registered
Authors
Tor J. JohansenAbstract
No abstract has been registered
Authors
Tor J. JohansenAbstract
No abstract has been registered
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No abstract has been registered
Authors
Tonje ØklandAbstract
No abstract has been registered
Authors
Bjørn Olav Rosseland Toril Drabløs Eldhuset M. StaurnesAbstract
No abstract has been registered