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.
2011
Forfattere
Kristin Lichtenfeld Mekjell MelandSammendrag
Det er ikke registrert sammendrag
Forfattere
Mekjell Meland Clive KaiserSammendrag
Det er ikke registrert sammendrag
Forfattere
Martin Vohnik Jesse j. Sadowsky Petr Kohout Zuzana Lothakova Rolf Nestby Miroslav KolarikSammendrag
Ericacea are ubiquitous calcifuges that often dominate acidic soils with poor nutrient status. Their nutrition depends on mycorrhizal fungi, which provide access to recalcitrant substrates unavailable to non-mycorrhizal plants. To date, the only experimentally proven ericoid mycorrhizal fungi belong to the Ascomycota. Ericoid mycorrhiza (ErM) with an unusual 1- to 3-layer sheat of clamped hyphae were observed in Vaccinium spp. roots in two habitats in mid-Norway. The respectiv mycobiont was isolated and examined for polygenetic position and ability to form ericoid mycorrhiza. Two conspecific clamp-and cystidia-bearing isolates formed the characteristic sheated ErM and enhanced growth of ericaceous hosts in vitro. Both failed to riably amplify with several common primer combinations (e.g.,ITS1 and ITS1F+ITS4); based on three RNA gene analyses they reside in the proximity of Trechisporales and Hymenochaetales and represent a unique lineage within Agaricomycetes.
Forfattere
Annbjørg Øverli KristoffersenSammendrag
Det er ikke registrert sammendrag
Forfattere
Geir Kjølberg KnudsenSammendrag
Det er ikke registrert sammendrag
Forfattere
Annbjørg Øverli KristoffersenSammendrag
Det er ikke registrert sammendrag
Forfattere
Hans Ragnar Norli Geir Kjølberg Knudsen Marco TasinSammendrag
Kairomones intersecting host searching females is an attractive method for species-specific pest control. Apple fruit moth, Argyresthia conjugella, is a major pest of apples in Fennoscandia. The severity of the attacks on apple happens as a response to large scale masting in the moths principal host rowan, Sorbus aucuparia. Co-occurrence of volatile compounds in rowan and apple is suggested to facilitate the forced host shift. The apple fruit moth responds to odour from its principal host with upwind orientation in a wind tunnel. Host responding apple fruit moths have high plasticity to blend ratios suggesting why a specialist insect can locate alternative host during intermast years and damage apples. However, even with all host compounds present, distortions of blend ratios seriously jeopardize upwind orientation in laboratory bioassays. In a combined approach with wind tunnel bioassays and field trapping, we have now identified a seven-component blend which is highly attractive for gravid female apple fruit moths. The new blend is especially attractive in apple crops, showing high odour competition compared to the secondary host. Verification of the blend in monitoring to achieve increased precision of pesticide sprays, establishment of economic damage thresholds and mass trapping is ongoing.
Forfattere
Geir Kjølberg KnudsenSammendrag
En times prat om kjemisk økologi i programposten "Vår hverdag" i Radio øst.
Forfattere
S Manasi Ingrid Nesheim KJ Joy Suhas Paranjape KV Raju Nagothu Udaya SekharSammendrag
Det er ikke registrert sammendrag
Forfattere
V. Geethalakshmi Lakshmanan R. Srinivasan D.Rajalakshmi Nagothu Udaya Sekhar H AnnamalaiSammendrag
Det er ikke registrert sammendrag