Blar i Skogforsøksvesenet/Skogforsk, Meddelelser på forfatter "Horntvedt, Richard"
-
Artificial inoculation with Ips typographus-associated blue stain fungi can kill healthy Norway spruce trees
Horntvedt, Richard; Christiansen, Erik; Solheim, Halvor; Wang, Shasheng (Meddelelser fra Norsk institutt for skogforskning;38.4, Research report, 1983-01)An infection experimcnt was made to test the pathogenicity of two Ceratocystis species on Norway spruce trees. Water stress in inoculated and control trees was measured by means of xylem water potential, stomatal aperture ... -
On diseases and pathogens on forest trees in Norway 1966-1975. Part II: Abnormal formations. Physiogenic diseases. Diseases due to unknown or complex causes
Roll-Hansen, Finn; Horntvedt, Richard; Roll-Hansen, Helga (Meddelelser fra Skogforsk;47.15, Report, 1997) -
Pathogenicity of Ophiostoma polonicum to Norway spruce. The effect of isolate age and inoculum dose
Horntvedt, Richard; Solheim, Halvor (Meddelelser fra Skogforsk;44.4, Research report, 1991-02)