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
Sammendrag
Dei siste to-tre åra har edelgranskotsjuke, årsaka av soppen Delphinella abietis, gitt store skadar i juletrefelt på Nord-Vestlandet og i Trøndelag. Nålene på årsskota vert brune og mange tre er så skadde at dei ikkje kan omsetjast.
Forfattere
Mekjell Meland Magne Eivind Moe Sigrid FlatlandSammendrag
During the period 2005-2006, trials with the bioregulator gibberellic acid (GA3) were conducted at Bioforsk Ullensvang in western Norway on mature sweet cherry trees. In 2005, unsprayed control trees of the cultivars `Van" and `Lapins" were compared with trees treated with one single application of 10, 20 and 30 ppm GA3 at the straw-yellow stage of fruit development. The same program was conducted the following year but included one extra application with 40 ppm GA3 to the cultivar `Lapins". Fruits were harvested when non-treated control fruits were mature, and again three times with 3 days intervals. At each harvest date a sub-sample of fruits were stored 3, 7, 10 and 14 days at 4ºC. Average fruit weight, fruit firmness, total soluble solids, fruit surface colour were determined for sub-samples of fruits at harvest dates and after storage. Fruit size was increased by near 1 g per fruit for both cultivars after GA3 application. Fruit firmness at harvest was not increased for the cultivar `Van" but responded linearly with increasing dosage of GA3 for the cultivar `Lapins". The maturity was delayed with half a week for "Van" and about one week for `Lapins" for all GA3 treated trees. The content of soluble solids was in general high and independent of the different treatments. Fruit size, firmness or soluble solid content were not influenced after storage and had market quality still after 10 days in cold store.
Forfattere
Martin Gierus Anjo Elgersma Michael Kreuzer Ralf Loges Harm J. Smit Håvard Steinshamn Fridhelm Taube Michael WachendorfSammendrag
Resultat frå simulert beiting av belgvekstartar dyrka under ulike klimatiske tilhøve i frå Austerrike i sør til Noreg i nord er presentert
Sammendrag
A series of field trials combining cultivars with different levels of resistance to Phythophtora infestans and different haulm killing methods was conducted in 1997, 1998 and 1999 to assess the contamination potential of the haulm. In addition, the frequency of tubers with late blight was assessed after harvest and storage, combining effects of pretreatment infection, infection by the haulm at harvest and the development of the disease during storage. Haulm killing was performed by diquat (200, 400, 600 g a.i. ha-1), half cutting of the haulm in combination with diquat (100, 200, 300 g a.i. ha-1) or full cutting of the haulm. In those treatments where haulm killing was performed purely chemically the haulm remnants" contamination potential tended to increase at reduced doses. Full mechanical destruction gave as low a contamination potential as application of the full dose of chemical haulm killer. However, there were no consistent differences between the haulm killing treatments in the frequency of blighted tubers after harvest and storage. This indicates that the input of chemical haulm killers may be reduced. There was a large difference between years in tuber blight after harvest and storage, which confirms that climatic factors are of major importance for tuber infection. The large difference found between the cultivars in the frequency of tuber blight indicates that tuber resistance should be an important part of integrated late blight disease management.
Sammendrag
Virkning av fruktorden, polyetylenmulch og tidlig driving på biokjemiske komponenter ble undersøkt i jorbærsorten Korona,
Sammendrag
Det er ikke registrert sammendrag
Sammendrag
Foreløpige resultater på effekt av plantestørrelse og herdingsforhold på frosttoleranse i kveke, åkertistel og åkerdylle ble presentert
Sammendrag
Foreløpige resultater på effekt av plantestørrelse og herdingsforhold på frosttoleranse i kveke, åkertistel og åkerdylle ble presentert
Forfattere
Hans OvergaardSammendrag
Knowledge of factors that influence oviposition behavior of malaria mosquitoes is critical to vector control measures aimed at larval habitat modifications and source reduction. Anopheles minimus s.l., an important malaria vector in Southeast Asia, generally breeds in clear, unpolluted water along shaded grassy edges of slow-moving streams. The objective of this study was to determine the influence of vegetation and plant structure on An. minimus s.l. ovipositing females. Twenty gravid female mosquitoes per replication were given a choice to lay eggs in bowls surrounded by different combinations of bare soil, grasses, small-leaved plants, and large-leaved plants. An. minimus s.l. females generally preferred to lay eggs in bowls with vegetation. A significantly higher number of eggs were found in bowls with small-leaved plants compared to bowls with grasses (P large-leaved plants > grasses > soil. Further studies are needed to determine the possible roles of plant structure and factors such as semiochemicals in the different species of the An. minimus species complex. Knowledge of female oviposition behavior is essential for the development of locally adapted approaches to source reduction and breeding site interventions.
Sammendrag
Foreløpige resultater på effekt av økning i temperatur og/eller CO2, samt skygging på etterfølgende gjenvekst ved 5-14 "C av kvekejordstengler og røtter av åkerdylle og åkertistel ble presentert.