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.
2008
Sammendrag
In greenhouse rose production, there is a trend towards the use of extreme long days (up to 24 hours lighting) and high light intensity to reduce problems with powdery mildew. Continuous lighting has been found to have adverse effects on some insects as well. The effect of continuous lighting on the survival, development and fecundity of the greenhouse whitefly, Trialeurodes vaporariorum on cut roses was investigated in climatic chambers with artificial light at 21oC and 70% RF. Compared to whiteflies exposed to 20:4 hours L:D, whiteflies exposed to continuous lighting had lower egg and larval/pupal survival, and lower fecundity and female longevity. Egg and egg-adult developmental time was only slightly affected.
Sammendrag
Four populations of pollen beetle (Meligethes aeneus) was tested for susceptibility to lambda-cyhalotrin and tiacloprid in 2008. Resistance to pyrethroids was found in 2 populations from locations near Hamar, both in field tries and bioassays. One population from Vestfold has low resistance. The results was concistent with what was found in 2007. One population from Østfold had to high control mortality to draw any conclusion. These beetles were collected very late in the season. Low resistance was found in the same district in 2007. One population from Hamar had lower susceptibility to tiacloprid than the other populations.
Sammendrag
Mulighetene for effektiv bekjempelse av rapsglansbiller er viktig for å gi god økonomi i oljevekstproduksjonen. Fordi det ikke har vært andre godkjente plantevernmidler på markedet, har billene i de siste 10 årene kun blitt bekjempet med pyretroider. Nå har denne ensidige bruken ført til at billene er blitt resistente i flere områder på Østlandet.
Sammendrag
Det er ikke registrert sammendrag
Forfattere
A. Lehtinen A. Hannukkala B. Andersson Arne Hermansen Vinh Hong Le Ragnhild Nærstad May Bente Brurberg B.J. Nielsen J. G. Hansen J. YuenSammendrag
Det er ikke registrert sammendrag
Sammendrag
The difficulty in subculturing biotrophic fungi complicates etiological studies related to the associated plant diseases. By employing internal transcribed spacer rDNA-targeted quantitative real-time polymerase chain reaction, we now show that the heteroecious rust Thekopsora areolata, commonly associated in natural conditions to sapling shoots and cones of Norway spruce and leaves of wild bird cherry, frequently infects nurserygrown seedlings of the conifer. A spatial sampling scheme was used to investigate seedlings and saplings of Norway spruce showing phloem necrosis: the highest concentration of DNA of T. areolata was recorded in the area with necrotic phloem. The separate analysis of bark and wood tissues suggested that the initial spread of the rust to healthy tissues neighboring the infection site takes place in the bark. A Phomopsis species found to coexist with T. areolata in several seedlings showed very high DNA levels in the upper part of the lesion, and even in the visually healthy proximal tissues above the lesions, which indicates that the ascomycete, most probably a secondary invader following primary infection by T. areolata, has a latent stage during early host colonization. We hypothesize that this hemibiotrophic mode of infection contributes to the successful coexistence of Phomopsis with a biotrophic rust.
Sammendrag
Rotkjuke er en skadesopp, og et stort problem i europeiske skoger. Den angriper 20 prosent av grantrærne og frigjør derfor mye CO2. Kunnskap om rotkjukas nedbrytingsprosesser kan imidlertid tenkes brukt til å lage biodrivstoff fra trær.
Forfattere
Berit Nordskog David M. Gadoury May Bente Brurberg Tor Håkon Sivertsen R. Kennedy Arne HermansenSammendrag
Det er ikke registrert sammendrag
Sammendrag
Nokre planter er det rett og slett forbod mot å planta, så som pile- og bulkemispel, på grunn av pærebrann. Eit anna døme er ask, der det no er restriksjonar på flytting av planter til smittefrie sonar på grunn av askeskotsjuke. Dessutan er det mange planter som er så utsette for sjukdom at ein bør unngå dei på grunn av redusert prydverdi.
Populærvitenskapelig – En svamp - to sygdomme
Arne Stensvand, Håvard Eikemo, Bodil Damgaard Petersen
Sammendrag
Artikkelen omhandlar rotstokkrote og lerrote i jordbær som begge er årsaka av Phytophthora cactorum.