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
Sammendrag
Det er observert oppsvulmete skudd og kvister, som innholder larver, på rødpil. Skaden er forårsaket av en gallmygg i slekten pilegallmygg (Dasineura, syn. Rabdophaga). Larvene er lys rødgule (1,5 x 1,0 mm) og gallene dannes på 1-årige skudd. De bekjempes ved å fjerne og brenne (evt. grave ned) skudd og kvister med galler på våren og forsommeren.
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
Sammendrag
Resultater fra forsøk i feltkammer der tilvekst om høsten og gjenvekst om våren er registrert.
Forfattere
Jens G Hansen Bent Nielsen Lars Bødker Björn Andersson Jonathan Yuen Lars Wiik Arne Hermansen Ragnhild Nærstad Vinh Hong Le May Bente Brurberg Asko Hannukkala Ari LehtinenSammendrag
Epidemiologiske studier av tørråtesoppen blir presentert
Sammendrag
Data om tørråtepopulasjonen i 2003 fra de nordiske land blir presentert
Forfattere
Leontine Colon David E L Cooke Jens G Hansen Poul Lassen Didier Andrivon Arne Hermansen Ewa Zimnoch-Guzowska Alison LeesSammendrag
The pan-European Concerted Action on late blight `Eucablight" was set up and launched in 2003, with the aim of providing tools for investigating variation in both the host and the pathogen. Objectives include the construction of a database, (www.Eucablight.org) containing information on past and current potato cultivars and late blight populations available in the participating countries, and the design, testing and recommendation of protocols for testing host resistance and pathogen diversity. The database is structured, and made accessible, in such a way that many different target groups can use the data for their own purpose. Farmers will be able to find out about the characteristics of the pathogen and the best performing cultivars in their region. DSS advisers will be able to access the model parameters they need to build locally adapted forecasting systems and scientists will be able to employ the data to study host and pathogen interactions, and to place this in an historical perspective. Once the database is operational, maintenance and the entry of new data should take minimal effort. Submission of data is open to anybody who wants to contribute and who follows the standard protocols. We intend the database to generate enough interest to be kept up to date by members of the research community who will continue to submit their results. If this can be achieved, the database will be an important instrument for potato breeders, scientists, advisors and policy makers to follow the co-evolution of host and pathogen in Europe and inform the use of appropriate resistance genes and control measures.
Forfattere
Dag-Ragnar BlystadSammendrag
Kort orientering om sharkavirus - spredning, symptomer og skade