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.
2005
Forfattere
Hans Martin Hanslin Svein GrimstadSammendrag
Blåskjellkompost fra en prøvekompostering ble undersøkt med hensyn på egenskapene som innslag i dyrkingsmedier.
Forfattere
Alhaji JengSammendrag
Jord og vann er ikke ubegrensede ressurser og mangel på en fornuftig jord- og vannressursforvaltning fører til kronisk fattigdom, hungersnød, konflikter, og total nedbrytning av samfunn. Store deler av Afrika sør for Sahara har lite nedbør, men ved en fornuftig forvaltning av vannressursene kunne vannmangel ofte vært unngått. Samtidig står man overfor store utfordringer fordi befolkningen vokser mye raskere enn mengden tilgjengelig vann, og en økende urbanisering har ført til store problemer med vannforurensning i by- og bynære områder
Forfattere
Richard Meadow Linda Hjeljord Annette Folkedal SchjøllSammendrag
In order to infect target insects after application to soil or plant surfaces, Metarhizium anisopliae conidia must remain viable in the face of abiotic and biotic factors. As a part of an inveestigation to develop M. anisopliae as an agent against the black wine weevil, we investigated the fungus ability to compete with conidia of fungi commonly isolated from soil and aboveground surfaces of strawberry in Norway. In previous work, we determined the speed of germination of the isolates at various temperatures, and investigated the effects of inoculating various nutrient substances with conidia of the insect pathogens, before or together with conidia of Cladosporium sp., Trichoderma spp., Verticillium sp., Botrytis cinerea, and Gliocladium sp. Results showed that the insect pathogens, germinated as quickly as the other fungi only at temperatures >=25C. Although germination spees of the insect pathogens varied between isolates, none germinated nor grew as quickly at 15 or 20C as did the other fungi. When coinoculated with conidia of the environmental isolates on a range of agar media at 20C, growth of the insect pathogens was strongly inhibited. In contrast, when the insect pathogens were inoculated at a distance from the other fungi, their colonies inhibited mycelical growth of all the other fungi; M. anisopliae isolates produced clear antibiosis zones against Cladosporium sp. and B. cinerea. On nutrient-poor media, or when substrate nutrients were depleted, colonies of the insect pathogens were eventually overgrown by Gliocladium sp. and Trichoderma spp.In an experiment where weevil larvae were exposed to conidia of M. anisopliae and T. atroviride either separately or combined, and incubated in sterile soil at 22C, the Metarhizium appeared to be unhibited in killing the larvae and sporulating. Follow-up experiments are plannes to look at this interaction at different temperatures and when applying the fungi to the soil.
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Marianne StenrødSammendrag
Det er ikke registrert sammendrag
Forfattere
Marianne Stenrød Ole Martin Eklo Marit Almvik Jens Kværner Tore Sveistrup Marie-Paule Charnay Pierre BenoitSammendrag
Det er ikke registrert sammendrag
Forfattere
Therese With Berge Haldor FykseSammendrag
Site-specific weed management (SSWM) of annuals will probably only be adopted by Norwegian cereal farmers if a cheap SSWM design becomes available. This could be one camera mounted in front of tractor taking images along a narrow path at the middle of sprayer boom, and nozzles automatically and collectively switched on as economic damage threshold is reached. We tested the suitability of this design ("SSWM, Low") by comparing spraying decisions ("spray"/"not spray") of this low resolution (about 16-m) with a high resolution (about 2-m) design ("SSWM, High"). Study concluded that one camera per spray boom (about 16-m wide) seems suitable because mean spraying error, as compared to "SSWM, High", was only 10%. Mean herbicide reductions were c. 60% for both SSWM designs.
Forfattere
Lita Greve Geir Kjølberg Knudsen Peter WitzgallSammendrag
A male Peyerimhoffina gracilis was collected in a trap experiment with the aphid pheromone nepetalactol, in Klostersågen east of Sjöbo in South-Sweden. P. gracilis has recently been reported from Great Britain and Denmark and it is possible that this species is showing a northward range in North-Western Europe.
Forfattere
Stein Turtumøygard Nina Syversen Bent Braskerud (permisjon)Sammendrag
Det er ikke registrert sammendrag
Sammendrag
Vitenskapelig bok av Landbruksuniversitetet i Wroclaw " Monografi serie