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
Forfattere
Rune Halvorsen Tom Andersen Hans Blom Arve Elvebakk Reidar Elven Lars Erikstad Geir Gaarder Asbjørn Moen Pål Buhl Mortensen Ann Norderhaug Kari Nygaard Terje Thorsnes Frode Ødegaard Marit Mjelde Kjell Magnus NorderhaugSammendrag
Det er ikke registrert sammendrag
Forfattere
R. Halvorsen T. Andersen H.H. Blom A. Elvebakk R. Elven L. Erikstad G. Gaarder A. Moen P.B. Mortensen Ann Norderhaug K. Nygaard T. Thorsnes F. Ødegaard M. Mjelde K.J. NorderhaugSammendrag
Inndeling i økosystem-hovedtyper
Forfattere
Rune Halvorsen Tom Andersen Hans Blom Arve Elvebakk Reidar Elven Lars Erikstad Geir Gaarder Asbjørn Moen Pål Buhl Mortensen Ann Norderhaug Kari Nygaard Terje Thorsnes Frode Ødegaard Marit Mjelde Kjell Magnus NorderhaugSammendrag
Det er ikke registrert sammendrag
Forfattere
A. Norderhaug A. Johansen G. KarlsenSammendrag
Innspill til forvaltningsplan for jordbrukslandskapet i Røst kommune. "Utvalgte kulturlandskap i jordbruket i Nordland".
Forfattere
Berit Nordskog David M. Gadoury May Bente Brurberg Tor Håkon Sivertsen Roy Kennedy Arne HermansenSammendrag
Downy mildews represent some of the most important plant diseases in the production of several field vegetable crops in Norway. Disease outbreaks are difficult to predict since severity of the diseases and the first appearance of the pathogens can differ substantially between seasons. As part of an ongoing project, the initial sources of inoculum for downy mildews of onion (Peronospora destructor), lettuce (Bremia lactucae) and cucumber (Pseudoperonospora cubensis) is investigated to ensure the use of appropriate control measures for these diseases in Norway. Necrotic leaf tissue from infected plants has been examined for the presence of oospores. Oospores have so far been found profusely in lettuce and sparsely in onion, but not in cucumber. Other aspects that are surveyed are the distribution of spores in air. Spore traps are used to identify both the initial appearance of inoculum, and the presence and amount of spores over a field. To determine spore quantities, real-time PCR has been applied to analyze daily spore catch. These results were compared to data from parallel spore traps where hourly numbers of spores are enumerated by use of microscope. An attempt to backtrack an early infection of P. cubensis was made by producing trajectories to show where possible sources of infection may be located in the case of long distance distribution of spores by air. This work will be continued in 2008 and 2009, and the results will be used for better forecasting of downy mildew pathogens in Norway.
Sammendrag
Colletotrichum acutatum is the causal agent of anthracnose/bitter rot in cherry and apple in Norway. It is the most important fruit decay in sour cherry in the country and may give severe losses also in sweet cherry and apple. Single spore isolates frequently develops the ascigerous stage of the fungus (Glomerella acutata) in culture, but it has not yet been detected on apple or cherry plant material. We thus anticipate that the predominant inoculum source is conidia (formed in acervuli). The fungus overwinters in old infected fruits and fruit stalks, in bud shells and in wood of cherry and apple. Infected flowers and leaves may serve as additional inoculum for fruit infections during the growing season. If still attached to the tree, fruits and fruit stalks of sour cherry infected the previous year may produce inoculum of C. acutatum throughout the entire following season. Up to 80% of the fruit spurs on sweet cherry may have buds infected with C. acutatum in spring. Apple buds may also contain the fungus. More than 90% of the sweet cherry leaves may contain C. acutatum around harvest in heavily infected orchards. The entire leaf surface may be infected, but visible infections never appear. We frequently also find such asymptomatic leaf infections in apples. Most of the inoculum seems to be present on the fruit trees themselves. However, initial inoculum in newly planted, disease free plantings may come from older fruit trees, ornamentals and weeds in or in close vicinity to the orchards.
Sammendrag
Seed production in Norway spruce (Picea abies) seed orchards may be severely reduced by insects attacking cones and seeds. Insects in several orders and genera are responsible for the damage, and at present there are no effective and environmentally acceptable control options. Studies in Sweden have shown promising results with spraying Bt (Bacillus thuringiensis var. kurstaki x aizawai) against species of Lepidoptera, but for other pests other control methods must be developed....
Forfattere
Trond HofsvangSammendrag
Det gis en oversikt over bibelvers hvor insekter og edderkoppdyr omtales. Greshopper er den domminerende insektgruppen.
Forfattere
Trond HofsvangSammendrag
Det er ikke registrert sammendrag
Sammendrag
Bruk av insektmidler over lengre tid øker faren for at insekter utvikler resistens som gjør at insektmidlet mister sin virkning. Slik resistens kan utvikles på to forskjellige måter, enten ved en økt evne til å detoksifisere insektmidlet eller ved en forandring i målmolekylet som insektmidlet binder til. Resistens utgjør en alvorlig trussel for skadedyrkontroll både i Norge og på verdensbasis.