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.
2009
Forfattere
Venche TalgøSammendrag
Det er ikke registrert sammendrag
Forfattere
Karl ThunesSammendrag
Det er ikke registrert sammendrag
Forfattere
Martha EbbesvikSammendrag
Planelggingsprogrammet er nyttig for å beregne dekningsbidrag ved dagens drift og hvis gården legges om til økologisk drift. Avlingsnivå kan beregnes ut dyretall, fôrlager, opptak på beite eller fra opplysninger fra enkelt skifter.
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Anna-Karin Borg-Karlsson Anna-Karin Borg-Karlsson Jerry Cross Lene SigsgaardSammendrag
Introduction: The strawberry blossom weevil, Anthonomus rubi, is a major pest insect of cultivated strawberry in northern part of Europe. The weevils deposit eggs in the flower buds before it sever the buds from their stalks, leading to a direct loss of crop. The aim of this project is to develop an effective plant protection method without insecticides, to be used in both conventional and organic agriculture.Methods: Volatiles emitted by the strawberry plants were collected using SPME and identified by GC/MS. In field studies which took place in Norway, Denmark and UK funnel traps bated with different plant volatile compounds and the pheromone blend Grandlure were tested. The volatiles were tested separately and in mixtures. On the background of the results from the first two years optimisation of the mixture were carried out during the third year of field trails. This process included adding more test compounds and testing the most potent compound at different concentrations. In addition, modified traps were tested for improving insect catch rates. Results: The chemical analysis of the host volatiles identified several compounds present in different quantities. At some study sites traps baited with one of the identified plant compound and Grandlure showed significant increased attraction compared to traps bated with the single plant compound or only Grandelure. The results from the optimisation process showed different catch rates of weevils according to composition of the volatile mixture and the trap design.Conclusions: The result shows that there may be is a synergistic effect between one of the plant volatile compounds and the pheromone blend Grandlure when used as bait for trapping strawberry blossom weevils. However, this attraction can be reduced by adding more compounds. Hopefully, the result from this study will generate knowledge important for developing a new plant protection method for strawberry.
Forfattere
Geir Kjølberg Knudsen Marco TasinSammendrag
Abstract: Apple fruit moth Argyresthia conjugella (Zeller) (Lepidoptera: Argyresthiidae) is the most important insect pest in apples in Fennoscandia. Its principle host is the masting forest three rowan Sorbus aucuparia. Damage to apple occurs only in intermasting years when rowan produces low crop. A monitoring tool is needed to detect the timing of female migration to apple in order to precisely apply control measures. Volatile plant compounds may be used to trap migrating females searching for the alternative host during intermasting years. In this study we present data from field monitoring experiments. In 2007 we carried out a field test in apple with the aim to screen for behaviorally active compounds beside those already described by Bengtsson et al. (2006). In traps baited with three component blends we found four compounds that could be regarded as synergists. These compounds were in 2008 tested both in rowan and apple. We detected insects by both visual inspections and trapping in a rowan stand, whilst only traps baited with the candidate compounds could detect migrating insects in apple orchards. The number in apple however was low due to the fact that 2008 was a low-attack season and the majority of the moths remained in the rowan stands. Improvements of blend composition for field monitoring may be achieved by additional field tests in damage years in combination with ongoing wind tunnel studies.
Forfattere
Åsmund AsdalSammendrag
Det er ikke registrert sammendrag
Forfattere
Nina OpstadSammendrag
Modulbasert undervisning i plantebiologi på fagskolenivå, 21 timer.
Forfattere
Guro BrodalSammendrag
Det er ikke registrert sammendrag
Forfattere
Inger Sundheim FløistadSammendrag
Det er ikke registrert sammendrag