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.
2007
Forfattere
Arne StensvandSammendrag
Amistar (aktivt stoff: azoxystrobin) er godkjent i jordbær og bringebær. Artikkelen gir ein kort omtale av kva soppsjukdomar preparatet er aktivt mot og faren for utvikling av resistens.
Forfattere
Arne StensvandSammendrag
Artikkelen omtalar fire nye funn i 2007 av jordbærsvartflekk (årsaka av Colletotrichum acutatum) i sertifisert produksjon av jordbærplanter. Tidlegare funn, spreiing av soppen og andre vertplanteartar vert kort omtala.
Sammendrag
Denne artikkelen omhandlar biologi og epidemiologi hos både det kjønna og ukjønna stadiet til Mycosphaerella ribis i solbær (Ribes nigrum) og tiltak mot sjukdomen som soppen årsakar.
Forfattere
David M. Gadoury Arne Stensvand Robert C. Seem M. Cathy Heidenreich Maria Herrero Mary Jean WelserSammendrag
Dette foredraget omhandlar det kjønna stadiet til mjøldogg i jordbær, overvintring, spreiing og infeksjon.
Sammendrag
Denne posteren omhandler ontogenetisk resistens mot mjøldog i jordbærplanter.
Forfattere
Matias Pasquali Kye-Yong Seong Jon Menke Erik Lysøe Karen Hilburn Yanhong Dong Jin-Rong Xu H. Corby KistlerSammendrag
To understand trichothecene accumulation and the infection cycle of the head blight pathogen F. graminearum sensu stricto, fungal gene expression profiles were monitored during germination of ascospores and during plant infection. A total of 328 genes were determined to be specifically expressed in ascospores. Among genes highly up-regulated in ascospores was one most closely related to FoStuA of F. oxysporum and StuA in Aspergillus. Mutants deleted for this gene in F. graminearum (FgStuA) are greatly decreased in sporulation and produce no perithecia. Unlike FoStuA mutants in F. oxysporum, FgStuA mutants are greatly reduced in pathogenicity. Reduced pathogenicity may be due to decreased le vels of trichothecene toxins, which in the mutant are
Forfattere
Anita SønstebySammendrag
Vi har studert den klimatiske reguleringen av blomsterdanningen hos en rekke norske populasjoner av markjordbær. Resultata viser mange likhetstrekk med det som er kjent for hagejordbær med et utpreget samspill av temperatur og daglengde. Markjordbær er således dagnøytrale og danner blomster i både korte og lange dager ved 9 °C, ved 15 °C bare under kortdags-forhold, mens de ikke evner å danne blomster i det hele tatt ved 21 °C uansett daglengdeforhold.
Forfattere
Bjørn Molteberg Trygve S. Aamlid Gudni Thorvaldsson Anders Hammarlund Frank Enger Tatsiana Espevig Åge Susort Daniel NordSammendrag
En testing av sorter til bruk på skandinavisk golfgreener startet opp som et nytt prosjekt i 2007. Fire forsøk ble etablert på USGA greeener ved Östra Ljungby Naturgymnasium, Sverige, Bioforsk Landvik and Bioforsk Apelsvoll, Norge og ved en golfbane i Keldnaholt, Island. Totalt 42 sorter innen rødsvingel, engkvein, hundekvein og krypkvein, flerårig raigras og markrapp er med i prosjektet. Sådato for Apelsvoll, Landvik, Keldnaholt og Östra Ljungby var henholdsvis 26. juni, 11, juli, 17. august og 6. september. Feltene har i såingsåret blitt klippet ned til 6 mm i rødsvingel, raigras og rapp og 4 mm i kvein. Mange sorter, spesielt innen raigras og markrapp, men også av kvein og rødsvingel viser lovende resultater. Greenåra 2008, 2009 og 2010 vil fortelle mer om disse sortene.
Sammendrag
Occurrence of entomopathogenic nematodes (EPNs) have been reported from all continents in the world except Antarctica. Africa is the continent with fewest reports so far. There have however been reports on EPNs occurrence in Egypt, Kenya and South Africa. EPNs are well known due to their potential as biological control agents of insect pests. Banana weevil (Cosmopolites sordidus) is as an important insect pest of banana. This pest causes reduced banana production in all countries of the East African Highlands in particular Tanzania and Uganda. Different strategies have been employed to control the insect. However the potential for using entomopathogenic nematodes as biological control agents of the weevil has not yet been considered in Tanzania. A preliminary study is ongoing to find out if entomopathogenic nematodes naturally exist in banana growing areas in Tanzania. Currently nine soil samples have been collected from three regions (Mbeya, Morogoro and Coast) with different agroecological conditions. The samples have been taken to Bioforsk in Norway, for extraction of EPNs. Analysis of the samples has been done using larvae of the Greater Wax moth (Galleria mellonella) as bait. After 7 and 14 days dead larvae were removed from the soil samples and placed on water agar. Some of the dead larvae were infected with entomopathogenic fungi and at least one sample had a dead larva with EPN infection. In this sample an adult nematode in the genus Steinernema was isolated. Many dead larvae also had what appeared to be secondary infections of saprophytic nematodes (Rhabditidae) and/or saprophytic fungi. Identification to species or genus level of the nematodes is ongoing. This study reports the find of EPNs for the first time in Tanzania. The isolation of indigenous EPNs are important for further studies on their suitability for control of local insect pests including banana weevils. Future work will include more soil samples for EPNs analysis and semi-field tests using EPNs against banana weevil.
Forfattere
Arnstein Staverløkk May-Guri Saethre Eline Benestad HågvarSammendrag
The invasive ladybird, Harmonia axyridis Pallas 1773, is recorded for the first time in Norway. The specimen was found on horticultural plants imported from Aalsmeer in the Netherlands to Oslo, Norway. H. axyridis originates from East-Asia. The species is known to be a voracious predator on aphids and has been extensively used as a biological control agent in both North America and Europe. The later years, however, a number of negative impacts on the environment and biodiversity have been reported. The species was assessed as a potential bio-control agent for use in Norwegian greenhouses in 2001. The outcome of the assessment was negative with respect to import and commercial use in Norway. It was concluded that H. axyridis might survive and become established outdoors and thereby pose a risk to the environment. Recent experiences from the UK have shown that H. axyridis compasses several of the traits characterizing a successful invasive alien species. The record of this species in Norway may only be the first in a number of such, as it is likely that this species will survive outdoors, at least in the southern parts of Norway.