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.
2010
Forfattere
Anne Sverdrup-Thygeson Kristina Bjureke Odd Stabbetorp Tor Erik Brandrud Anders K. Wollan Harald Bratli Frode Ødegaard Hans Blom Camilla NæssSammendrag
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Forfattere
Line JohansenSammendrag
Simultaneously expanding and persistent Trifolium repens patches were studied in a nutrient-poor lawn that was frequently cut. Trifolium repens primary stolon growth strategies were analysed in relation to their location inside the patch, and according to patch size. It was hypothesised that different growth strategies inside a patch can explain a both persistent and expanding patch of Trifolium repens, and that growth strategies were different between patch sizes. The result indicated different growth strategies inside and at the border of patches. Trifolium repens stolons at the border were long, grew fast, had few lateral stolons and grew out of the patch while, stolons inside the patch were smaller, grew slowly, and had more lateral stolons and a wide range of growth directions. Growth strategies were not different between patch sizes. The directional growth and the high growth rate at the border will increase the patch size with time, while the growth strategy near the centre consolidates the patch in space and time, by placing ramets inside the patch. These growth strategies together in a patch result in Trifolium repens patches that are simultaneously persistent and on the increase. The results also indicate a division of labour among primary Trifolium repens stolons in a patch.
Forfattere
Kirsten TørresenSammendrag
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Forfattere
Martha EbbesvikSammendrag
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Forfattere
May-Guri SaethreSammendrag
Urban and peri-urban (UPU) horticulture provides an increasingly important source of income in African countries. A major factor driving the importance of UPU gardening is an increasing marketing opportunity for a growing population of unemployed and unskilled youths in the cities. The potential of UPU gardening is severely undermined by a number of production constraints. Recent field diagnoses in Benin identified severe pest problems and revealed alarming pesticide practices in the UPU areas. Several major pest problems are direct consequences of pesticide abuse that 1) destroys biodiversity required for natural/biological pest control, 2) causes pesticide resistance and pest resurgence and 3) poses personal and environmental hazards. Increasing pesticide use among vegetable producers in UPU gardens in Benin has induced resistance to insecticides in some insect pests. The misuse of pesticides often results in mild to severe human poisonings. Chronic consequences of prolonged exposure to pesticides lack documentation. Additional negative effects are insecticide resistance in insect vectors because of leakage of insecticides to mosquito breeding sites. Insecticide resistance in Anopheles mosquitoes is threatening the success of malaria control programmes. Pesticides which have been banned internationally are commonly used in UPU vegetable production in Africa. Consumer"s consumption of pesticide residues through contaminated products gets little attention. The link between agriculture, environment and health is evident, and climate change contributes to increase already existing challenges.
Forfattere
Line Emilie Sverdrup Christine Bjørge Ole Martin Eklo Torsten Källqvist Ingeborg Klingen Marit Låg Edgar Rivedal Erik Ropstad Steinar Øvrebø Merete GrungSammendrag
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Sammendrag
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Sammendrag
Foredraget gir en oversikt over det vi vet per i dag om hvordan veksthuslyset kan påvirke trips, mellus og de nyttedyrene som brukes i biologisk bekjempelse, og presenterer resultater fra egne forsøk med LED-lamper og ekstreme daglengder i roser. Konklsjon: •Växsthusbelysningen påvärkar beteende och biologi hos skade- och nyttodjur • Effekten av ljuset varierer från art til art. Svårt at generalisera. • Stort behov för kunskap om växsthusbelysningens betydning för biologisk och integrerat bekämpning • Samspel med andra faktorer: T.ex. temperatur, gjödning, vatten och CO2, planteart och sort.
Sammendrag
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Sammendrag
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