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.
2007
Forfattere
Ragnhild Nærstad Arne Hermansen Vinh Hong Le Andrew Dobson Jafar Razzaghian Eldrid Lein MoltebergSammendrag
Experiments of the effect of haulm killing and different other treatments during end of season on tuber blight of potato were presented
Forfattere
May Bente Brurberg Arne Hermansen Abdelhameed Elameen Vinh Hong Le Björn Andersson Asko Hannukkala Bent J Nielsen Jens G Hansen Jonathan YuenSammendrag
Studies of genetic variation of the late blight pathogen among isolates collected in 2003 in the Nordic countries were presented
Forfattere
Bent J Nielsen Jens G Hansen Hans Pinnschmidt Ragnhild Nærstad Arne Hermansen Vinh Hong Le Asko HannukkalaSammendrag
Potato late blight experiments with spore release and viability under field conditions were presented
Sammendrag
Bekjemping av ugras ved frøavl av engsvingel med ikke-kjemiske og kjemiske metoder presenteres. Dette er en del av en ugrasserie med problemugras ved frørensing og hvordan disse bekjempes i frøeng av ulike gras- og kløverarter.
Forfattere
Jan Netland Kjell WærnhusSammendrag
Sulfonylurearesiatens funne i 5 ugrasrter: Balderbrå, då, linbendel, stivdylle og vassarve
Forfattere
Jan Netland Kjell WærnhusSammendrag
Det er funne sulfonylurea resistens i balderbrå, då, stivdylle, linbendel og vassarve. Resistent vassarve er vanlegast.
Sammendrag
Seed borne diseases can cause serious problems in organic cereal production because no fungicide treatments can be used and so far only few alternative treatments are approved. The effects of alternative seed treatments against net blotch (Drechslera teres) in barley and leaf blotch (D. avenae) in oats were investigated by laboratory tests and field trials at two locations in Norway in 2005. A barley seed lot with 65 % D. teres infected seeds and an oat seed lot with 15 % D. avenae infected seeds were used. The treatments included Inulex*, Terra Biosa**, acetic acid and Cedomon***, in addition to chemical seed treatment (triticonazol + imazalilsulfat) and untreated seeds as controls. Seeds were analysed for germination and pathogens in laboratory (2x100 seeds) and planted in rows of 100 seeds with 8 replicates in each field location. Percentage emergence and seedlings with primary infections were recorded at BBCH 12-13. Infection level of D. teres recorded in laboratory analyses were reduced significantly by Inulex and acetic acid. In field, the best effect was seen by the acetic acid treatment. The effects against D. avenae were generally poor in laboratory tests and the infection level of the oat seed lot used was too low to give primary symptoms in the field. Similar experiments will be carried out in 2006 and results from this will also be presented. *Extract of Inula viscosa. ** Containing lactic acid bacteria and different herbs. *** Commercial seed treatment (BIOAGRI), based on the soil bacteria Pseudomonas chlororaphis.
Forfattere
Guro BrodalSammendrag
Det er ikke registrert sammendrag
Sammendrag
To avoid problems with seed borne diseases in organic cereal production, seed health testing should be compulsory in certification of organic seed. In general, significantly lower infection frequencies of seed borne diseases are recorded on seedlings than on seed. Thresholds for the amount of seed borne inoculum that can be accepted for organic production are therefore needed. The aim of the work presented is to compare transmission rates of Drechslera on barley and oats under organic and conventional conditions, to be able to decide if existing thresholds used to assess the need of chemical seed treatment, can be applied for acceptance of organic seed lots, or for recommendation of alternative treatments. Field experiments were carried out in 2005 in conventional and organic fields situated close to each other at each of three locations (south/east-Norway, east-Norway and mid-Norway). 10 seed lots of barley and 10 lots of oats, with a range of seed infections (barley: 0-94 % Drechslera teres, average 31.4 %; oats: 0-66 % Drechslera avenae, average 22.0 %) were planted in rows of 100 seeds with 8 replicates in each location/`growing system". Percent emergence and seedlings with primary infections were recorded at BBCH 12-13. On average in the three locations 2.5 % and 1.8 % barley seedlings were infected when grown in conventional and organic fields, respectively. In oats, 2.0 % and 0.9 % infected seedlings were recorded in conventional and organic fields, respectively. Similar experiments will be carried out in 2006 and results from this will also be presented.
Sammendrag
Forsøk med bekjemping av grasugras i frøavl av timotei, enggrapp og rødsvingel ble presentert som poster