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.
2011
Sammendrag
The effect of different light environments on trap catches of Frankliniella occidentalis and Trialeurodes vaporariorum was investigated in a commercial greenhouse rose production unit during late autumn. Two top light treatments were used: 1) High pressure sodium lamps (HPSLs) and 2) HPSLs and light emitting diodes (LEDs) with 20% blue and 80% red light. More thrips and fewer whiteflies were caught on yellow sticky traps, and more thrips were found in the flowers, in areas were LEDs were used in addition to HPSLs compared to areas where only HPSLs were used. No effect of the light treatments was found on the population level of Amblyseius swirskii, but a lower ratio of predatory mites to thrips was found on the plants where LEDs were used. The results suggest that using blue and red LEDs as interlighting, or otherwise supplementary to HPSLs, will change thrips and whitefly spatial distribution in the rose crop, and that natural enemy release rates probably need to be adjusted accordingly.
Sammendrag
The effect of different light environments on trap catches of Frankliniella occidentalis and Trialeurodes vaporariorum was investigated in a commercial greenhouse rose production unit during late autumn. Two top light treatments were used: 1) High pressure sodium lamps (HPSLs) and 2) HPSLs and light emitting diodes (LEDs) with 20% blue and 80% red light. More thrips and fewer whiteflies were caught on yellow sticky traps, and more thrips were found in the flowers, in areas were LEDs were used in addition to HPSLs compared to areas where only HPSLs were used. No effect of the light treatments was found on the population level of Amblyseius swirskii, but a lower ratio of predatory mites to thrips was found on the plants where LEDs were used. The results suggest that using blue and red LEDs as interlighting, or otherwise supplementary to HPSLs, will change thrips and whitefly spatial distribution in the rose crop, and that natural enemy release rates probably need to be adjusted accordingly.
Forfattere
Nina JohansenSammendrag
Temaer: •Import av plantemateriale til Norge •Hvilke arter rører mest på seg i internasjonal handel? •Utfordringer •Tiltak for å redusere risiko for introduksjon og etablering av nye skadegjørere
Forfattere
Nina JohansenSammendrag
Topics: a) What is pesticide resistance?, b) History of pesticide resistance c) Concequenses of pesticide resistance, d) Resistance risk factors, e) Pesticide Resistance Management, f) Regulation of the placement of pesticides on the market, g) National action plan, h) International cooperation and coordination of pesticide resistance management.
Forfattere
Nina JohansenSammendrag
Temaer: •å unngå resistens •Kjemiske midler på markedet – er det nok for å unngå resistens? •Resistensprofiler •Internasjonal handel og resistens •Presentasjon av prosjektet "Redusert risiko for plantevernmiddelresistens".
Forfattere
Nina JohansenSammendrag
Presentation of methodology and results from a survey of susceptibility in the westen flowerthrips, Frankliniella occidentalis, to spinosad and abamectin.
Sammendrag
Temaer: Effekt av, temperatur og fuktighet, dynamisk klimastyring og lysforhold på biologisk bekjempelse i veksthus.
Sammendrag
Det er ikke registrert sammendrag
Sammendrag
Arable weeds are generally distributed in patches, while herbicides are applied uniformly. Herbicides can be saved if only the patches are sprayed, i.e. patch spraying (PS). Bottlenecks for cost-effective PS are weed monitoring technology and valid technology-based decision rules for PS (thresholds). The novel machine vision algorithm Weedcer has been developed as an efficient weed monitoring tool for PS. Weedcer estimates the proportions of young weed leaves and cereal leaves in high resolution red–green–blue images. We conducted field trials to test relative weed cover (RWC) and relative mayweed cover (RMC) estimated by Weedcer as decision rules for PS. RWC is the total weed cover divided by the total plant cover and RMC is the mayweed cover divided by the total plant cover. The main criterion for evaluation and basis of these thresholds was the measured grain yield. Images (about 0.06-m2) were acquired with a GPS guided autonomous field robot in spring, the normal time for spraying seed-propagated broadleaf weeds in both winter – and spring cereals in Norway. Three map-based trials (weed monitoring and spraying in two separate operations) showed that mean RWC per management unit (12.0 × 12.5-m) was generally adequate. In winter wheat heavily infested with scentless mayweed (Tripleurospermum inodorum (L.) Sch.Bip.) and/or scented mayweed (Matricaria recutita L.), the mean RMC per management unit was more adequate. Progress during the project allowed three additional trials conducted in real-time (weed monitoring and spraying in the same operation). These were conducted with the robot in spring cereals, and showed that a weighted moving average of RWC per image was adequate. The sprayed and unsprayed management units in these trials were minimum 3.0 × 3.0-m and 0.5 × 3.0-m, respectively. Results indicated that the Weedcer-based thresholds should be lower in wheat (Triticum aestivum) than in barley (Hordeum vulgare).
Sammendrag
Sorten Glen Ample dominerer nå norsk bringebærdyrking, også den økologiske. Denne sorten har mange gode egenskaper under norske forhold, men er dessverre spesielt utsatt for store angrep av bringebærbladmidd (Phyllocoptes gracilis) som svekker plantene og går utover bærkvaliteten. Heldigvis fi nnes det økologiske tiltak mot denne skadegjøreren.