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
Atle Wibe Anna-Karin Borg-Karlson Jerry Cross Lene SigsgaardSammendrag
One of the major pests on cultivated strawberry in northern part of Europe is the strawberry blossom weevil, Anthonomus rubi. The weevils deposit eggs in the flower buds before it sever the buds from their stalks. This may lead to a direct loss of crop of more than 50%. To develop effective plant protection method against A. rubi funnel traps baited with the sex aggregation pheromone and plant volatiles were used for trapping weevils in the fields. The sex pheromone blend used in the study was a mixture of Grandlure I, Grandlure II and Lavendulol (ratio 1:4:1). Plant volatiles emitted by the strawberry plants were collected using SPME and identified by GC/MS. These chemical analyses identified several compounds present in different quantities. The sex pheromone blend and selected plant volatiles were tested in fields either separately or in different mixtures. The field trials were carried out during a three year period where the last year aimed to optimise the mixture used in the previous years by adding more test compounds and testing the most potent compound at different concentrations. To improve insect catch rates modified traps were also tested. The study sites were in Norway, Denmark and in the UK. General high catch rates were achieved at three different study sites in Norway due to high weevil density. The results from these fields, supported by the results from the fields with lower catch rates, were in accordance with each other. The main finding was that traps baited with some identified plant volatile compounds and the sex pheromone blend increased the catch rates compared to traps bated with single a plant compound or the sex pheromone blend alone. The results show also that the concentration of the plant volatiles relative to the pheromone concentration is important for attracting weevils to the traps. This study has shown that it is important to bait insect traps with both sex aggregation pheromones and plant volatiles at the correct level to achieve significant catch rates of A. rubi. Hopefully, the results will generate knowledge important for developing new plant protection method for strawberry without using insecticides.
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Per Stålnacke Nagothu Udaya Sekhar Johannes Deelstra Haakon Thaulow Line J Barkved Dag Berge I Nesheim Geoffrey D Gooch Alistair Rieu-Clarke Dan Kim Nhung Antonio La Porto Bruna Grizetti Santiago Begueria PortuguesSammendrag
Det er ikke registrert sammendrag
Forfattere
Nagothu Udaya Sekhar H Annamalai V Geetha LakshmiSammendrag
Det er ikke registrert sammendrag
Forfattere
A Lakshmanan V Geetha Lakshmi Nagothu Udaya SekharSammendrag
Det er ikke registrert sammendrag
Forfattere
Nils-Otto Kitterød Nagothu Udaya Sekhar V AnnamalaiSammendrag
Det er ikke registrert sammendrag
Forfattere
V Geetha Lakshimi A Lakshmanan R Srinivasan Nagothu Udaya Sekhar H AnnamalaiSammendrag
Det er ikke registrert sammendrag
Forfattere
H.-S. Hekmisaari M Salemaa O Kiikilä Christian Uhlig T NieminenSammendrag
Det er ikke registrert sammendrag
Forfattere
H Annamali V Prasanna J Hafner Nagothu Udaya Sekhar Nils-Otto KitterødSammendrag
Det er ikke registrert sammendrag
Forfattere
V Geetha Lakshimi A Lakshamanan M.S. Arasu Nagothu Udaya SekharSammendrag
Det er ikke registrert sammendrag