Publikasjoner
NIBIOs ansatte publiserer flere hundre vitenskapelige artikler og forskningsrapporter hvert år. Her finner du referanser og lenker til publikasjoner og andre forsknings- og formidlingsaktiviteter. Samlingen oppdateres løpende med både nytt og historisk materiale. For mer informasjon om NIBIOs publikasjoner, besøk NIBIOs bibliotek.
1995
Forfattere
Michael J. Wingfield T.C. Harrington Halvor SolheimSammendrag
Det er ikke registrert sammendrag
Forfattere
Halvor SolheimSammendrag
Invasion of lodgepole pine sapwood by blue-stain fungi was followed for 7 weeks afterinfestation by the mountain pine beetle, Dendroctonus ponderosae. During this period all sapwood was heavily stained blue and blue-stain fungi were always isolated close to the front of visible occlusion. Ophiostoma clavigerum and Ophiostoma montium were commonly isolated, both of which are known to be carried in the mycangia of the mountain pine beetle. Ophiostoma montium was most frequently isolated, but when both fungi were present O. clavigerum was always at the lending edge of fungal penetration. On average O. momium trailed 7.3 mm behind O. clavigerum. Other microorganisms were seldom isolated.
Forfattere
Jon Pettersen Knut J. Huse Halvor Solheim Kåre Olav VennSammendrag
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Forfattere
Halvor SolheimSammendrag
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Forfattere
Darrell W. Ross Halvor SolheimSammendrag
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Forfattere
Halvor SolheimSammendrag
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Forfattere
Halvor SolheimSammendrag
Det er ikke registrert sammendrag
Forfattere
Malcolm M. Furniss Alan E. Harvey Halvor SolheimSammendrag
Strial pits on the elytra of unflown Ips pini (Say) carry spores like those of the tree-pathogenic blue-stain fungus Ophiostoma ips (Rumbold) Nannfeldt, yeast, and other fungi, as seen by scanning electron microscopy. O. ips ascospores develop on the walls of pupal chambers in the phloem of infested pines and adhere to newly transformed I. pini adults. Inoculation of severed pine stem sections with body parts excised from beetles washed in water or alcohol produced phloem lesions characteristic of the hypersensitive wound reaction to O. ips. A fungus, characteristic of O. pini, was isolated from infected wood beneath lesions caused by inoculation with head, prothorax, elytron, and alimentary canal. Similar infections and reisolations resulted from inoculations of live trees with an elytron-derived culture that caused necrosis of sapwood radially inward from lesions, and tree mortality when lesions encircled the stem.
1994
Forfattere
Karl ThunesSammendrag
Det er ikke registrert sammendrag
Sammendrag
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