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
Sammendrag
Soppen Cylindrocladium buxicola vart i august 2010 stadfesta på buksbom (Buxus sempervirens) i ein privathage i Oslo, og seinare på hausten i Rogaland. C. buxicola vart også funnen på importerte planter i fleire hagesenter i Akershus. Det er difor all grunn til å tru at infiserte planter er spreidde over store område og kan koma til å smitta ned tidlegare etablert buksbom. Infeksjon fører til sterkt bladfall og visning.
Sammendrag
Buksbom visnesjuke (Cylindrocladium buxicola) vart i august 2010 funnen på sjuk buksbom (Buxus sempervirens) i Oslo, i Rogaland og på importerte planter i fleire hagesenter i Akershus. Soppen er eit problem på denne vertplanta i mange Europeiske land.
Forfattere
Venche Talgø Erling Fløistad Kari Ørstad Trude L. Slørstad Arne Stensvand PublikasjonsforfatterSammendrag
En alvorlig svampesygdom hærger buksbom i store dele af Europa. Sygdommen er også konstateret i Danmark og kan få vidtgående konsekvenser på kirkegårde og i parkanlæg.
Sammendrag
Strawberry production in high plastic tunnels is becoming popular for the advantages of extended production and reduced disease problems. However, this production system creates favorable conditions for several pests, including the two-spotted spider mite (Tetranychus urticae) and for some diseases, of which powdery mildew (Podosphaera aphanis) is the most important. Preliminary laboratory experiments were conducted to study: (1) the preference of T. urticae to mildew infected vs. healthy strawberry leaves, and (2) the impact of powdery mildew on T. urticae egg production and predation of the predatory mite Phytoseiulus persimilis. Five days after the mite release, the total number of T. urticae eggs and nymphs found on healthy leaf discs were two times higher than on leaf discs with powdery mildew, predatory mites or both. In the preference experiment, a significant number of T. urticae moved to healthy strawberry leaf discs and settled there for the whole period of the experiment. The results indicated that T. urticae did not thrive on strawberry leaves heavily infested with powdery mildew, and that powdery mildew seemed to reduce the predation efficiency of P. persimilis. Therefore, it may be economical and efficient to control powdery mildew before releasing P. persimilis to control the spider mites.
Sammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag
Sammendrag
Fusarium langsethiae is a recently characterized fungus within the genus Fusarium. It is found as a grain contaminant of small grain cereals such as oats and barley, and to a lesser extent wheat. Fusarium langsethiae is particularly widespread in the Nordic countries and the UK where it poses a serious problem as the main producer of T-2 and HT-2 mycotoxins. The biology of F. langsethiae and its interaction with the plant remains poorly understood, partly hampered by difficulties reproducing a natural level of infection under controlled conditions. The reported study was designed as a series of glasshouse experiments to advance our understanding of F. langsethiae biology by investigating alternative infection routes and its proliferation in oats, Avena sativa. Various methods of seed, soil, and seedling inoculation, boot injection and spray inoculation, were tested. The results clearly show a strong preference of F. langsethiae for the panicle, ruling out alternative infection routes. At relatively low temperatures spray infection, accompanied by prolonged humidity, ensured a thorough establishment of the fungus both at flowering and at early dough stage. Boot injection proved to be a reliable working tool for production of an even and predictable grain infection. Apart from in the panicle, considerable fungal proliferation was only detected in flag leaf nodes, and was a direct consequence of the boot injection method. Fungal presence in the node tissue also correlated with significant stunting of infected shoots. In light of the results the pathogenic and endophytic abilities of F. langsethiae are discussed.
Sammendrag
Dette er en kort gjennomgang av været i vekstsesongen 2011 basert på data registrert ved Bioforsks værstasjoner og noen detaljer hentet fra klimatologiske oversikter utgitt av Meteorologisk institutt. Temperatur- og nedbørdata viser at det i perioden mai til september var varmere og våtere enn normalt de fleste steder. Enkelte stasjoner på sentrale deler av Østlandet hadde litt lavere varmesum enn normalt, mens det ved våre stasjoner nord for Bodø var betydelig tørrere enn normalt.
Sammendrag
This is a final report for the project Norwegian Scenarios from the periods 1999-2002 and 2005- 2008, mainly focusing on the simulations done with the models MACRO and PRZM. The aim of this project was to improve the risk assessment work in Norway by establishing surface- and groundwater scenarios which could be representative for Norwegian conditions and to later use these for approval of new pesticides. This project has been a cooperation between Bioforsk Plantehelse, Norwegian University of Life Sciences and the Norwegian Food Safety Authority.