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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

Undersøkingar av koloradoedelgran på Vest- og Austlandet i 2008 tydar på at kreftsoppen Nectria sp. er svært aggressiv på denne edelgranarten. Det vert planta relativt lite koloradoedelgran, så som regel finn ein berre solitære tre i nokre få hagar og grøntanlegg. Meir urovekkjande er det at vi i 2008 også fann store skadar på grunn av Nectria sp. på fjelledelgran i Nordskogen på Ås, då det vert satsa stort på denne trearten i norsk juletredyrking.

Sammendrag

I vekstsesongen 2008 vart det observert store skadar på koloradoedelgran (Abies concolor) på både Aust- og Vestlandet. Frå kreftsår på skadde tre vart det funne ein sopp med kjenneteikn som tyda på at det var Nectria fuckeliana. DNA-analyse synte at det var ein Nectria-art, men ikkje N. fuckeliana. Inntil dette er nærare undersøkt, omtalar vi soppen som Nectria sp.

Til dokument

Sammendrag

In 2007, after many years of absence, Cucumber Green Mottle Mosaic Virus (CGMMV) reoccurred in Norwegian cucumber production. The Norwegian Food Safety Authority is considering to regulate CGMMV as a quarantine pest and commissioned a Pest Risk Analysis (PRA) of the virus. The Panel of Plant Health gives the following conclusions: Both recent and previous presence of CGMMV indicate that the pest is able to establish in the PRA area. The most probable pathway for long distance spread into the PRA area is seed transmission. Infected seedlings, people, water and soil are probable pathways for short distance spread. The probability of further spread is from location to location is high. Dry heat treatment has probably been the most effective measure to prevent the spread of CGMMV. There is a moderate level of uncertainty regarding the pathway for entry of CGMMV into the PRA area. There is a low degree of uncertainty regarding the pathogen survival and possibilty for transmission, establishment and spread in Norwegian greenhouse cucumber production.

Til dokument

Sammendrag

Wild oats (A. fatua) is present in 155 out of 431 Norwegian municipalities. It is widely distributed in all municipalities in the main agricultural areas in south-east and central-east Norway, and in the municipalities close to the Trondheim fjord. Otherwise wild oats is present in only a few scattered municipalities not geographically connected to these main areas. Endangered area, not yet infested by A. fatua, is estimated to 228858 ha. This area is spread over the cereal growing part of Norway. The counties of North- and South -Trøndelag have a higher portion of endangered area not yet infested than south and central part of East Norway. The probability of entry of A. fatua from outside the PRA area (Norway) is very low. The probability of spread within Norway is high. In areas with low infestation, like in Trøndelag, the probability of spread is lower than in heavily infested areas. However, in areas with high level of infestation there are few new farms left to be infested. The official wild oats register is a valuable tool in regulations aiming to limit spread. The register also provides a tool to follow up infested farms. The register would be even more useful if inspection for infestation on new farms had been more systematic. Wild oats is no longer devastating even in cereal monocropping, due to cost efficient herbicides. However, in Norway an increasing area is infested with wild oats. The infestation may vary from only a few plants to total coverage of the field. In cereal monocropping chemical treatment with and without hand roguing is the only feasible control methods. Hand roguing alone is expensive and ineffective even on modest infestation. The structural changes in cereal farming result in more farms being managed by entrepreneurs. Field managed by entrepreneurs promotes use of herbicide even on small infestations since this is a cost effective measure to control the weed. Less official control of cereal fields can also be expected. The economical consequences are thus expected to be high. The economical consequences can be even higher in organic farming if the most profitable rotation has to be changed to a less profitable one because of wild oats infestation.

Sammendrag

I vekstsesongen 2008 vart det observert store skadar på koloradoedelgran (Abies concolor) på både Aust- og Vestlandet. Frå kreftsår på skadde tre vart soppen Cylindrocarpon cylindrioides isolert. Det er det ukjønna stadiet av kreftsoppen Nectria fuckeliana.

2007

Sammendrag

Det første og viktigste trinn i bekjempelse av planteskadegjørere er en korrekt identifisering av organismen som forårsaker skade. Testmetoder som er basert på deteksjon av arvestoff (DNA) til en organisme har vist seg å være svært nyttige i diagnostikken. Vi har etablert en DNA-basert test for identifisering av potetcystenematoder.