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
Abstract
One of the main challenges for new wood protection systems is to predict in a fast and accurate way service life in use class 3 (above ground) and use class 4 (in soil or fresh water contact). New environmentally benign wood protection systems are expected to have different modes of action against wood deteriorating fungi compared to the traditional preservatives, change in water sorption being one of them. Therefore it is of importance to evaluate new treated wood products in a broad range of exposure situations, also exploring the variation within use class 3 and 4. Due to the restrictions in the use of chromium containing wood preservatives, a range of studies have been published the last decade evaluating the performance of new products after laboratory or field test exposure. However, there is still a lack of studies comparing the same material in different field exposure situations. This study evaluates the efficacy of 13 novel wood protecting systems in three different above ground tests (horizontal double layer, block test and mini stakes) and two different in-ground tests (EN 252 and mini stakes). Scots pine (Pinus sylvestris L.) sapwood from the same wood source was used for all treatments. For each wood protecting system the wood specimens for all five tests were treated together in the same batch. The results after five years of field exposure are presented. In the three above ground tests no or only initial signs of decay were detected after five years (not reaching a mean rating of 1). The decay rate in soil contact was faster than above ground, but after five years only untreated wood (controls) failed in both tests. No significant difference in performance was found between the two tests in soil contact. The use of median decay rate values gave an earlier indication of performance than the use of mean decay rate values.
Authors
Mekjell MelandAbstract
Det er ikke registrert sammendrag
Authors
Agnar KvalbeinAbstract
Foreløpige forsøksresultater fra forsøk på Landvik 2007 - 2009
Authors
Leif Sundheim Trond Hofsvang Christer Magnusson Trond Rafoss Arild Sletten Halvor Solheim Arne Stensvand Brita Toppe Anne Marte Tronsmo Bjørn ØklandAbstract
Det er ikke registrert sammendrag
Abstract
VKMs Panel on Plant Health gives the following main conclusions of the pest risk assessment: 1) The pest of concern is the oomycete Phytohthora fragariae Hickman. The PRA area is Norway. P. fragariae is present in at least five limited regions of the PRA area. These regions are located in the counties of i) Hedmark, ii) Aust-Agder and Vest-Agder, iii) Hordaland and Rogaland, iv) Vestfold, and v) Møre og Romsdal. It is probable that the pathogen is present at some places of production without having been detected yet. The pathogen is regulated as a quarantine pest in the PRA area. 2) With the current import regulations there is a medium probability of introduction of P. fragariae through import of infected Rubus plants for planting and a low probability of introduction through import of other consignments. However, there is little updated information available on the presence of the pathogen in different production systems, and there is only very limited evidence that the pathogen can spread by other means than strawberry plants. The level of uncertainty is therefore high. 3) Without the current import regulations there would be a very high probability of introduction through the import of non-certified strawberry plants. The level of uncertainty of this assessment is low. The probability of introduction through import of certified strawberry plants is considered low, but without detailed information on the presence/absence of the pathogen in such material the level of uncertainty is high. 4) With the current pest management procedures the probability of spread within the PRA area is medium for raspberry plants and machinery, other farm implements, footwear and animals. The probability of spread through other pathways ranges from low (legally traded, non-certified strawberry plants, seed potatoes, surface water, waterways and irrigation systems) to very low (remaining pathways). The level of uncertainty is low for certified strawberry plants and medium for legally traded, non-certified strawberry plants. Due to limited knowledge on the spread and survival of the pathogen, the level of uncertainty is high for all other pathways. 5) Without the current pest management procedures the probability of spread with strawberry plants within the PRA area would be very high. The probability of spread with raspberry plants would be high and the probability of spread with seed potatoes, machinery, other farm implements, footwear, animals, surface water, waterways and irrigation systems would be medium. The probability of spread through other pathways would range from low to very low. The level of uncertainty is low for strawberry plants, but due to limited knowledge on the spread and survival of the pathogen, the level of uncertainty is generally high for all other pathways. 6) All strawberry-growing areas in the whole PRA area are considered endangered areas.
Authors
Leif Sundheim Maria Luz-Herrero Trond Rafoss Brita ToppeAbstract
P. ramorum is present, but not widely distributed in Norway, and the pathogen is under official control. The surveys in the PRA area have not been conducted systematically, and some uncertainty remains regarding the distribution of P. ramorum in the PRA area. The probabilities of entry and establishment of the pathogen are both rated as high with low levels of uncertainty. In the absence of statutory control the probability of rapid spread of P. ramorum in PRA area by trade of host plants is considered high with low probability.
Authors
Christer MagnussonAbstract
Det er ikke registrert sammendrag
Authors
Leif Sundheim Trond Hofsvang Christer Magnusson Trond Rafoss Arild Sletten Halvor Solheim Brita Toppe Anne Marte Tronsmo Bjørn ØklandAbstract
Det er ikke registrert sammendrag
Authors
Arild Andersen Trond Hofsvang May Bente Brurberg Christer Magnusson Trond Rafoss Anne Marte Tronsmo Bjørn Økland Leif SundheimAbstract
Det er ikke registrert sammendrag
Authors
Arild Andersen Trond HofsvangAbstract
Evaluering av skadevirkning for Liriomyza trifolii ved introduksjon i Norge Evaluation of possible damage by accidental introduction of Liriomyza trifolii into Norway