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.
2000
Forfattere
Sverre KobroSammendrag
Det er ikke registrert sammendrag
Sammendrag
Phytophthora infestans was isolated from potato leaves and tubers collected from different parts of Norway in 1993-98. Isolates were assessed for mating type, DNA fingerprints, resistance to metalaxyl and virulence phenotype. Differences in the A1/A2 ratio were evident among regions and A2 was not found in northern areas. In the southern part of the country the A2 frequency was relatively stable and 26 % of the isolates (n=1144) was mating type A2. Metalaxyl resistance was found in 31-59 % of the isolates in the period 1996-98 (n=988). All known virulence genes were found among isolates tested in 1996 (n=105), and race 1.3.4.7.10.11 was most common (resistance gene R9 was not included in the differential set). Oospores were observed in potato leaves from three locations in the southern part of Norway. RG57 fingerprints were determined for 102 isolates from 1996. A large number of genotypes and high genetic distances between the genotypes were found, which indicates that sexual reproduction is contributing significantly to the genetic variation of P. infestans in Norway. Validation of the warning system TELEVIS was carried out at one location in 1996-99. Treatments according to TELEVIS resulted in fewer sprays than conventional strategy without significant differences in haulm and tuber infections.
Forfattere
Nina TrandemSammendrag
Det er ikke registrert sammendrag
Forfattere
Ingeborg KlingenSammendrag
Naturlig forekommende insekt- og middpatogener kan være en viktig dødelighetsfaktor for mange skadedyr. Funn gjort både i Norge og utlandet peker i retning av at nyttemikrober bør få en viktigere plass i både integrert og økologisk fruktdyrkning.
Forfattere
H. Fykse K. Wærnhus Kjell WærnhusSammendrag
Det er ikke registrert sammendrag
Forfattere
Ingeborg KlingenSammendrag
I norsk fruktdyrking legges det vekt på nyttedyr som naturlige reguleringsmekanismer for skadedyr (insekter og midd). Naturlig forekommende patogener utgjør imidlertid også en viktig dødelighetsfaktor for mange skadedyr, og funn gjort både i Norge og utlandet peker i retning av at nyttemikrober bør få en viktigere plass i både integrert og økologisk fruktdyrking.
Forfattere
Arne Hermansen T. Amundsen G. Taksdal Steinar Dragland G. Synnevåg M. Flønes Leif SundheimSammendrag
Infection by Mycocentrospora acerina on carrots were examined in the period 1985 to 1995 in monoculture plots at four sites with crop rotation experiments in Norway. At two of the locations, with the most variable climate, the incidence and severity of M. acerina infections on leaves and roots varied most through the different years. At these locations M. acerina attack on the roots was positively correlated with precipitation in July. At one location the incidence of leaf infection corresponded significantly with the incidence on the roots. At one site the length of the storage period was correlated with the incidence and severity of liquorice rot in storage.
Forfattere
Torstein KvammeSammendrag
Det er ikke registrert sammendrag
Forfattere
Halvor SolheimSammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag