Blar i NIBIO Brage på forfatter "Krokene, Paal"
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A highly-contiguous genome assembly of the Eurasian spruce bark beetle, Ips typographus, provides insight into a major forest pest
Powell, Daniel; Groβe-Wilde, Ewald; Krokene, Paal; Roy, Amit; Chakraborty, Amrita; Löfstedt, Christer; Vogel, Heiko; Andersson, Martin N.; Schlyter, Fredrik (Peer reviewed; Journal article, 2021-09-09)Conifer-feeding bark beetles are important herbivores and decomposers in forest ecosystems. These species complete their life cycle in nutritionally poor substrates and some can kill enormous numbers of trees during ... -
Insektskader
Krokene, Paal; Økland, Bjørn; Christiansen, Erik (Others, 2007)Dersom vi får et varmere klima er noen effekter tilnærmet sikre, slik som at mange insekter vil øke sin utbredelse mot nord, og at utviklingen fra egg til voksent insekt vil gå raskere. På et generelt plan er slike direkte ... -
Klimaframskrivninger i Tønsberg og Drammen - Styrking av kommunenes kart over blå og grønne verdier
Mathiesen, Henrik Forsberg; Eisner, Stephanie; Krokene, Paal; Frydenlund, Jostein (NIBIO Rapport;9(128) 2023, Research report, 2023-11-11)Denne rapporten gjør rede for metoder brukt for å fremstille temakart for framskrivninger av klima i Tønsberg og Drammen for perioden 2040-2070. Kartene skal gjøres tilgjengelige i kommunenes kartportaler. Temakartene går ... -
Klimavinnerne - blant insektene
Krokene, Paal; Økland, Bjørn; Nilssen, Arne C. (Others, 2010)Insektene er blant de organismene som reagerer raskest på klimaendringer. De har kort generasjonstid, er svært mobile og utviklingshastigheten deres er direkte påvirket av temperaturen. Dette betyr at utviklingen fra egg ... -
Linoleic Acid Promotes Emission of Bark Beetle Semiochemicals by Fungal Symbionts
Unelius, C. Rikard; Ganji, Suresh; Krokene, Paal (Peer reviewed; Journal article, 2022-12-30)Tree-killing bark beetles in conifer forests vector symbiotic fungi that are thought to help the beetles kill trees. Fungal symbionts emit diverse volatile blends that include bark beetle semiochemicals involved in mating ... -
Major transcriptomic differences are induced by warmer temperature conditions experienced during asexual and sexual reproduction in Fragaria vesca ecotypes
Zhang, Yupeng; Viejo, Marcos; Yakovlev, Igor; Tengs, Torstein; Krokene, Paal; Hytönen, Timo; Grini, Paul; Fossdal, Carl Gunnar (Peer reviewed; Journal article, 2023-07-14)A major challenge for plants in a rapidly changing climate is to adapt to rising temperatures. Some plants adapt to temperature conditions by generating an epigenetic memory that can be transmitted both meiotically and ... -
Methyl jasmonate, salicylic acid, and oxalic acid affects growth, inducible defenses, and pine weevil resistance in Norway spruce
Krokene, Paal; Kohmann, Ketil; Huynh, Ngan Bao; Magerøy, Melissa (Peer reviewed; Journal article, 2023-07-06)The large pine weevil (Hylobius abietis) is a major regeneration pest in commercial forestry. Pesticide application has historically been the preferred control method, but pesticides are now being phased out in several ... -
Methylome, transcriptome, and phenotype changes induced by temperature conditions experienced during sexual reproduction in Fragaria vesca
Zhang, Yupeng; Toivainen, Tuomas; Mackenzie, Kathryn; Yakovlev, Igor; Krokene, Paal; Hytönen, Timo; Grini, Paul; Fossdal, Carl Gunnar (Peer reviewed; Journal article, 2023-06-21)Temperature conditions experienced during embryogenesis and seed development may induce epigenetic changes that increase phenotypic variation in plants. Here we investigate if embryogenesis and seed development at two ... -
The microRNA response associated with methyl jasmonate-induced resistance in Norway spruce bark
Wilkinson, Samuel; Vivian-Smith, Adam; Krokene, Paal; Magerøy, Melissa (Peer reviewed; Journal article, 2021-05-15)Methyl jasmonate (MeJA) treatment elicits induced resistance (IR) against pests and diseases in Norway spruce (Picea abies). We recently demonstrated using mRNA-seq that this MeJA-IR is associated with both a prolonged ... -
Molecular underpinnings of methyl jasmonate‐induced resistance in Norway spruce
Magerøy, Melissa; Wilkinson, Samuel W.; Tengs, Torstein; Cross, Hugh; Almvik, Marit; Petriacq, Pierre; Vivian-Smith, Adam; Zhao, Tao; Fossdal, Carl Gunnar; Krokene, Paal (Peer reviewed; Journal article, 2020-04-22)In response to various stimuli, plants acquire resistance against pests and/or pathogens. Such acquired or induced resistance allows plants to rapidly adapt to their environment. Spraying the bark of mature Norway spruce ... -
Populasjonsovervåking av insekter
Økland, Bjørn; Christiansen, Erik; Krokene, Paal (Others, 2007)Det mangler per i dag overvåkingssystemer for en rekke viktige insekter som er eller kan bli viktige skadegjørere i norsk skog i fremtiden. Dette behovet har ytterligere blitt aktualisert fordi fremmede arter introduseres, ... -
Priming of inducible defenses protects Norway spruce against tree-killing bark beetles
Mageroy, Melissa; Christiansen, Erik; Långström, Bo; Borg-Karlson, Anna-Karin; Solheim, Halvor; Björklund, Niklas; Zhao, Tao; Schmidt, Axel; Fossdal, Carl Gunnar; Krokene, Paal (Peer reviewed; Journal article, 2019-11-01)Plants can form an immunological memory known as defense priming, whereby exposure to a priming stimulus enables quicker or stronger response to subsequent attack by pests and pathogens. Such priming of inducible defenses ... -
Risk assessment of the biological control product ANDERcontrol with the organism Amblyseius andersoni. Scientific Opinion of the Panel on Plant Health of the Norwegian Scientific Committee for Food and Environment
Stenberg, Johan A.; Nielsen, Anders; Wendell, Per Hans Micael; Alsanius, Beatrix; Krokene, Paal; Magnusson, Christer; Nicolaisen, Mogens; Thomsen, Iben M.; Wright, Sandra A. I.; Rafoss, Trond (Peer reviewed; Journal article, 2020-05-01)ANDERcontrol with the predatory mite Amblyseius andersoni as the active organism is sought to be used as a biological control agent in Norway. ANDERcontrol is intended for use against different mites (such as the two-spotted, ... -
Seasonal variation in Norway spruce response to inoculation with bark beetle-associated bluestain fungi one year after a severe drought
Öhrn, Petter; Berlin, Mats; Elfstrand, Malin; Krokene, Paal; Jönsson, Anna Maria (Peer reviewed; Journal article, 2021-06-11)In 2018, up to 4 million m3 Norway spruce was killed by the spruce bark beetle Ips typographus in Sweden. The event was unique for Sweden, in terms of both affected volume and the fact that it was triggered by severe drought ... -
Skader på skog. En håndbok i identifikasjon av skadegjørere. 2. reviderte utgave
Hylen, Gro; Krokene, Paal; Larsson, John Y.; Solheim, Halvor; Timmermann, Volkmar (Håndbok fra Skog og landskap;07/2007, Research report, 2007-04) -
Skogens helsetilstand i Norge. Resultater fra skogskadeovervåkingen i 2021
Timmermann, Volkmar; Børja, Isabella; Clarke, Nicholas; Eriksen, Rune; Gohli, Jostein; Hylen, Gro; Jepsen, Jane Uhd; Krokene, Paal; Lange, Holger; Meissner, Helge Rainer; Nagy, Nina Elisabeth; Nordbakken, Jørn-Frode; Solberg, Sverre; Solheim, Halvor; Vindstad, Ole Petter Laksforsmo; Økland, Bjørn; Aas, Wenche (NIBIO Rapport, Research report, 2023)Skogens helsetilstand påvirkes i stor grad av klima og værforhold, enten direkte ved tørke, frost og vind, eller indirekte ved at klimaet påvirker omfanget av soppsykdommer og insektangrep. Klimaendringene og den forventede ... -
Skogens helsetilstand i Norge. Resultater fra skogskadeovervåkingen i 2022
Timmermann, Volkmar; Børja, Isabella; Clarke, Nicholas; Gohli, Jostein; Hietala, Ari Mikko; Jepsen, Jane Uhd; Krokene, Paal; Lislegård, Harald Haga; Nagy, Nina Elisabeth; Nyeggen, Hans; Solberg, Sverre; Solheim, Halvor; Solvin, Thomas Mørtvedt; Svensson, Arvid; Tollefsrud, Mari Mette; Vindstad, Ole Petter Laksforsmo; Økland, Bjørn; Aas, Wenche (NIBIO Rapport, Research report, 2023)Skogens helsetilstand påvirkes i stor grad av klima og værforhold, enten direkte ved tørke, frost og vind, eller indirekte ved at klimaet påvirker omfanget av soppsykdommer og insektangrep. Klimaendringene og den forventede ... -
Skogskader – en kunnskapssammenstilling
Hanssen, Kjersti Holt; Solberg, Svein; Hietala, Ari Mikko; Krokene, Paal; Rolstad, Jørund; Solheim, Halvor; Økland, Bjørn (NIBIO Rapport;, Research report, 2019-12)I Europa er det registrert økende omfang av skogskader de siste hundre år, og klimaendringer er identifisert som en viktig driver bak økningene i for eksempel vindskader, barkbilleangrep og skogbranner. Det er likevel store ... -
Successful reproduction and pheromone production by the spruce bark beetle in evolutionary naïve spruce hosts with familiar terpenoid defences
Flø, Daniel; Norli, Hans Ragnar; Økland, Bjørn; Krokene, Paal (Journal article; Peer reviewed, 2018-02)1. The European spruce bark beetle Ips typographus is a damaging pest on spruce in Europe. Beetle interactions with tree species originating outside the natural range of the beetle are largely unknown and may be unpredictable ... -
Surviving in a Hostile World: Plant Strategies to Resist Pests and Diseases
Wilkinson, Samuel; Mageroy, Melissa; Sánchez, Ana López; Smith, Lisa M.; Furci, Leonardo; Cotton, T. E. Anne; Krokene, Paal; Ton, Jurriaan (Journal article; Peer reviewed, 2019-08)As primary producers, plants are under constant pressure to defend themselves against potentially deadly pathogens and herbivores. In this review, we describe short- and long-term strategies that enable plants to cope with ...