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.
2010
Authors
Tove Maria Østensvik Petter Nilsen Kaj Bo VeierstedAbstract
Det er ikke registrert sammendrag
Authors
Grete StokstadAbstract
Antallet aktive bruk i Nord-Norge synker, men størstedelen av jorda holdes i hevd ved at drifta overtas av andre bruk. Men hvilke faktorer er det som avgjør om et areal drives videre eller går helt ut av produksjon?
Authors
Christer MagnussonAbstract
Det er ikke registrert sammendrag
Authors
Christer MagnussonAbstract
Det er ikke registrert sammendrag
Abstract
In 2008, severe outbreaks of Neonectria canker were found on white fir (Abies concolor) in southern Norway, and a Neonectria sp. was isolated from two counties in southwestern Norway and four counties in southeastern Norway. Both old and young trees were dead or dying. The same Neonectria sp. was also isolated from Siberian fir (A. sibirica), subalpine fir (A. lasiocarpa), and Norway spruce (Picea abies) in southeastern Norway. Previously N. fuckeliana had been reported on spruce species in Norway and on spruce and fir species in other countries. Sequencing of the internal transcribed regions (ITS) of ribosomal DNA showed that all of the isolates from 2008 were identical and were more similar to N. ditissima (syn. N. galligena) than to N. fuckeliana. The isolates were five base pairs different from N. ditissima, and they may in the future be considered a new species. The perithecia were dark around the ostiole. This morphological characteristic is known from N. ditissima, but not from N. fuckeliana. Inoculation tests were carried out on subalpine fir, white fir, and Norway spruce, and the fungus was pathogenic on all inoculated species. Thiophanate-methyl proved very effective against Neonectria sp. in laboratory fungicide trials.
Authors
Trond HofsvangAbstract
Two Malaise traps were set up at Ås, Southern Norway, during the growing seasons 1992-1997, one trap in an organic grown barley field and one in its boundary. Totally 23 species of Tipulidae (Diptera) were identified, of these eight species belonged to the genus Nephrotoma Meigen, 1803. Of the total specimens collected 93% of the males and 88% of the females belonged to this genus. Comparing the two traps, 80% of the Nephrotoma specimens were recorded in the organic field. It is discussed if larvae of Nephrotoma spp. in Norway can be potential pests in agricultural crops as reported from other countries. To Malaisefeller ble plassert ut i Ås i vekstsesongene 1992-1997, en i en økologisk dyrket byggåker og en i kanten av åkeren. Totalt ble 23 arter av stankelbein (Tipulidae, Diptera) identifisert, 8 av disse tilhørte slekten Nephrotoma. Av det totale antall individer som ble samlet inn, var 93 % av hannene og 88 % av hunnene av slekten Nephrotoma. 80 % av Nephrotoma-individene ble funnet i den fellen som sto ute i byggåkeren. I mange andre land er larver av Nephrotoma-arter skadedyr på mange kulturplanter i jordbruket, og det diskuteres om disse artene kan opptre som skadedyr i Norge.
Authors
Celine Rebours Marte Meland Joao Amaro Tim Atack Katia Frangoudes Igotz Gallestegi Marie Lesueur Sebastien Pien Maírtín Walsh Julie MaguireAbstract
The NETALGAE project aims to create a European network of relevant stakeholders within the marine macroalgae sector, by creation of business tools such as database, website, trade directory and training materials. The project runs from 2010-2012, and is financed by the Atlantic Area Transnational Programme, The European Regional Development Fund and by national co- funding.
Authors
Marte Meland Marie Lesueur Sebastien Pien Martin Walsh H Barros T AtackAbstract
The project aims to create a European network of relevant stakeholders within the marine macroalgae sector, by creation of business tools such as database, website, trade directory and training materials. The network will include primary producers, processors, technology suppliers, process consultants, research institutes, development agencies, local governments and relevant community groups and other stakeholders. A wide ranging policy study will establish a best practice model and suggest policies for the successful and sustainable commercial utilization of marine macroalgae resources. The project runs from 2010-2012, and is financed by the Atlantic Area Transnational Programme, The European Regional Development Fund and by national co- funding. The project is lead by Indigo Rock Marine Research Ltd., Ireland. Partners are Bord Iascaigh Mhara (Ireland), Syndicat Mixte Pour l´Équipement du Littoral, Fisheries and aquatic sciences center- AGROCAMPUS OUEST and Université de Bretagne Occidentale (France), BIOFORSK (Norway), Universidade do Algarve (Portugal), Mutrikuko Institutua, Ikaslan Gipuzkoa and TKNIKA (Spain) and Viking Fish Farms, Ardtoe Marine Laboratory, UK. This poster will present the NETALGAE project, its aims, objectives, partners and preliminary results.
Authors
Christer MagnussonAbstract
S.radicicola is a parasite of barley and grasses like Poa annua and P.pratensis. The life cycle of a Norwegian population of S.radicicola (Poa-race) is studied in the laboratory by inoculating newly germinated P.annua (cv. Leif) with 140 juveniles from field collected galls and keeping the plants at 25˚C and 16 hrs light period. Juvenile stages are separated based on genital development. The first stage (J1) has 1 cell, while the following stages J2, J3 and J4 has 2, 3 and 4 (or more) cells in their genital primordia. J1 (L = 310-350μm) moults in the egg and J2 (L = 330-400μm) is the hatching stage. Nematodes emigrating from field collected galls were all J3:s (L = 360-430μm), and moulted outside the gall to J4 (L = 210-500μm). The first stage to appear in newly formed galls is large J4 (L=500-870 μm), which moults within 5 days to adult (L=820-1980 μm). Egg-laying starts within 13 days and eggs hatch after 22 days. Juvenile development in eggs starts at 5˚C, and 640 degree days are required for completing one generation corresponding to about 30 days at 25˚C. This means that in Norway S.radicicola may have up to 3 generations per year. The fact that J3 exit the galls and the large J4 is the first stage present in newly formed galls makes us speculate that the induction of gall formation occurs from outside by pre-infective J4, which later infects and develop inside the gall. Key Words: Root gall nematode, Subanguina radicicola, Poa annua, life cycle, Norway
Authors
Venche TalgøAbstract
Phytophthora spp., powdery mildews, Neonectria sp. and others