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
Sammendrag
Bladfall og daude skot har dei siste tiåra vorte eit omfattande problem i villbestand av kristtorn (Ilex aquifolium) langs sørvest-kysten av Noreg. Fleire soppar vert ofte isolert i samband med skadane, men spesielt ein Fusarium-art, som ved DNA-analyse synte seg å vera mest lik F. acuminatum, dominerar.
Forfattere
Venche Talgø Gary A. Chastagner Iben M. Thomsen Thomas Cech Kathy Rily Kurt Lange Sonja Klemsdal Arne StensvandSammendrag
For several decades, current-season needle necrosis (CSNN) has been a serious foliage disorder on noble fir (Abies procera) and Nordmann fir (A. nordmanniana) in European and North American Christmas tree and bough plantations. Randomly distributed needles in the new foliage develop chlorotic spots or bands that later may turn necrotic and cause heavy needle cast. We isolated Sydowia polyspora from symptomatic Nordmann fir needles from Austria, Denmark, Germany, Norway, Slovakia, and the U.S., and from Nordmann fir seeds produced in Austria, Denmark, Georgia, and Russia. We also isolated the fungus from noble, Turkish (A. bornmulleriana), grand (A. grandis), and subalpine (A. lasiocarpa) fir needles, and from noble and subalpine fir seeds. Furthermore, S. polyspora was isolated from needles with a missing wax layer around the stomata. Inoculation tests with S. polyspora produced CSNN symptoms on Nordmann fir seedlings and transplants. CSNN spread from tree to tree in a trial in a plastic tunnel in Norway.
Sammendrag
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.
Forfattere
Iben M. Thomsen Venche Talgø Gary A. Chastagner Thomas Cech Kurt Lange Bernhard Perny Kathy Riley Benjamin Louis Andrew Dobson Arne StensvandSammendrag
Current-season needle necrosis (CSNN) has been a serious foliage disorder on true fir Christmas trees and bough material in Europe and North America for more than 25 years. Isolations from symptomatic needles and inoculation tests in Norway clearly indicated that S. polyspora is involved in the development of CSNN. However, copper fungicides used in field trials were not effective. Laboratory tests confirmed that copper-based fungicides were not effective against S. polyspora, but other fungicides prevented spore germination and mycelia growth. The lack of results may be related to a failure of copper rather than an indication that the disease may not be controlled by fungicides. There is still much work to be done to further field test fungicides that showed an effect in the laboratory.
Forfattere
Venche Talgø Iben M. Thomsen Gary A. Chastagner Thomas Cech Kathy Riley Kurt Lange Guro Brodal Peder Lombnæs Sonja Klemsdal Arne StensvandSammendrag
CSNN (current season needle necrosis) gjer stor skade på edelgran til juletre og pyntegrønt både i Europa og USA. Nålene vert misfarga og fell ofte av. Det vi veit om CSNN så langt er: Utbrot av CSNN er truleg klimarelatert Stor variasjon i angrep mellom lokalitetar Genetisk variasjon i resistens mot CSNN CSNN skuldast etter alt å døma ikkje Ca-mangel CSNN smittar frå tre til tre Sydowia polyspora (syn. Kabatina abietis) isolert frå nåler med CSNN-symptom Smitteforsøk med S. polyspora gav CSNN-symptom S. polyspora vart funnen på frø S. polyspora isolert frå nåler med øydelagt vokslag rundt spalteopningane Pestalotiopsis funerea gav ikkje CSNN-symptom Dårleg effekt av kjemiske middel mot CSNN
Forfattere
Paul Eric AspholmSammendrag
Presentation for approx 30 Russian journalists under The Bellona seminar at Bioforsk Svanhovd. Presentation of information on PERMASOM, phenolgy and biological phenomen.
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Marianne BechmannSammendrag
Det er ikke registrert sammendrag
Forfattere
Kjell WærnhusSammendrag
Det er ikke registrert sammendrag
Forfattere
Anne Kjersti BakkenSammendrag
Kronikken tar for seg korvidt det er rett å hevde at norsk matproduksjon kan og har vore beitebasert.