Niklas Björklund

Since January 2017 I work full-time as an Pest Risk Analyst at the Unit for risk assessment of alien plant pests (http://www.slu.se/risk-assessment).

My previous research focused on how forest insects respond to their environment and how knowledge about insect behaviours can be used to deal with insect pests. I have mainly been working with two species of tree-killing bark beetles (Dendroctonus ponderosae and Ips typographus), and two weevil species that cause damage to conifer seedlings (Hylobius abietis) and young conifer trees (Hylobius warreni).

Key words: Climate change, co-evolution, defence, reproductive success, range expansion, pest management, reforestation, susceptibility rating, scarification, host plant acceptance, suitability, susceptibility, host finding, visual orientation, olfactory orientation, traps, methyl jasmonate, pine weevil, spruce bark beetle, mountain pine beetle.

• Uppsala University, Biology, Master of Science (MSc), 1999
• Swedish University of Agricultural Sciences (SLU), Biology, Doctor of Philosophy (PhD), 2004
• University of Northern British Columbia, Ecosystem Science and Management, Post-doc., 2005-2007 

Dept. of Ecology, Swedish University of Agricultural Sciences, Associate Professor (Docent), 2011-present

Dept. of Ecology, Swedish University of Agricultural Sciences, Researcher, 2008-2010

Dept. of Ecosystem Science and Management, University of Northern British Columbia, Post-Doctoral Fellow, 2005-2007

Dept. of Entomology, Swedish University of Agricultural Sciences, Ph.D. student, 1999-2004

Dept. of Clinical Neuroscience, Medical Psychology, Karolinska Hospital, Assistant in a research project, 1998-1999

For an updated list of publications see Google Scholar 

2025
• Maňák, V., et al. (2025). "Biodiversity and ecosystem service contributions of trees: A review for environmental risk assessments of non‐native plant pests in Sweden." Food Risk Assess Europe 3(2): 0063E.

• Boberg, J. and N. Björklund (2025). "Quick assessments for Chloridea virescens, Homona magnanima, Resseliella citrifrugis, and Spodoptera ornithogalli Quick assessments of the potential for establishment in Sweden for the provisional quarantine pests Chloridea virescens, Homona magnanima, Resseliella citrifrugis, and Spodoptera ornithogalli." Report. SLU.ua. 2025.2.6-1671 

• Battisti, A., et al. (2025). "Pest survey card on non-EU Choristoneura spp.". EFSA Supporting Publications 22(8): 9181E.

• European Food Safety Authority (EFSA), Gabriele Rondoni, Niklas Björklund, Laura Carotti, Giulia Mattion, Sybren Vos (2025). "Pest survey card on Ips typographus." EFSA Supporting Publications 22(1): 9141E.

• European Food Safety Authority (EFSA), Gabriele Rondoni, Niklas Björklund, Irene Vloutoglou, Laura Carotti, Giulia Mattion, Sybren Vos (2025) "Pest survey card on Euwallacea fornicatus sensu lato, Fusarium ambrosium and F. euwallaceae." EFSA Supporting Publications 22(1): 9179E.

2024
• Szyniszewska, A. M., et al. (2024). "Beyond the present: How climate change is relevant to pest risk analysis." EPPO Bulletin 54: 20-37.

• Rosace, M., et al. (2024). "Including climate change in pest risk assessment: current practices and perspectives for future implementation." EPPO Bulletin 54: 52-72.

• Björklund, N., et al. (2024). Assessment of the potential area for the establishment of the Colorado potato beetle in Finland and Sweden. Food Risk Assess Europe, 2 (3) 0042E.

• Björklund, N. and J. Boberg (2024). "Colorado potato beetle - An analysis to support surveillance of the protected zone in Sweden". Report: SLU.ua.2024.2.6-720 

• European Food Safety Authority (EFSA), Gabriele Rondoni, Niklas Björklund, Laura Carotti, Giulia Mattion, Sybren Vos (2024). "Pest survey card on Massicus raddei." EFSA Supporting Publications 21(12): 9159E.

2023
• Nordlander, G., et al. (2023). "Trap catch data are poor predictors of damage caused by pine weevil (Hylobius abietis) to conifer seedlings. Forest Ecology and Management 537, 120968

• Hannunen, S., et al. (2023). "Assessing the confidence in pest freedom gained in the past pine wood nematode surveys." EFSA Supporting Publications 20(12): 8482E.

• Chen, Y. Y., et al. (2023). "Healing of bark wounds in Norway spruce seedlings can be negatively affected by treatment with methyl jasmonate." Trees-Structure and Function 37(5): 1369-1384.

• Boberg, J. and N. Björklund (2023). "Options to manage populations of Globodera pallida and G. rostochiensis: questions related to crop rotation, resistance of potato and pathotypes." Report: SLU.ua.2023.2.6-2272 

• Björklund, N. and J. Boberg (2023). "Quick assessments of the potential for establishment in Sweden for a selection of new quarantine pests in 2022.". Report: SLU.ua.2022.2.6-3074 

• Björklund, N. and J. Boberg (2023). "Diaprepes abbreviatus-An evaluation of the information regarding its presence in Sweden." Report: SLU.ua.2023.2.6-3066 

2022
• Widenfalk, O., Jakobsson, M., Hammarström, A., Widenfalk, L., Josefsson, J., Keith, S., Vanduijn, B. (2022). Trade and production of plants and plant products in Sweden - A knowledge base for pest risk analysis – Update 2022. Technical Report, External project leaders Björklund, N., Boberg, J. Greensway and SLU, pp 46.

• Boberg, J. and N. Björklund (2022). "Risk assessment of Crisicoccus pini for Sweden.". Report: SLU.ua.2022.2.6-1304 

• Boberg, J. and N. Björklund (2022). "Is Matsucoccus matsumurae present in Sweden?". Report: SLU.ua.2022.2.6-1404 

• Björklund, N. and J. Boberg (2022). "Nya växtskadegörare–varför utgör de ett växande problem och vad kan vi göra åt det?" Kungl. Skogs-och Lantbruksakademiens tidskrift (KSLAT) 161(7).

• Björklund, N. and J. Boberg (2022). "Is Epiphyas postvittana present in Sweden?". Report SLU.ua.2022.2.6-1605 

• Björklund, N. and J. Boberg (2022). "Feedback on a list of plant pests with candidates for risk assessments–Batch 6." Report: SLU.ua.2022.2.6-3744 

2021
• Puentes, A., et al. (2021). "Variation in methyl jasmonate-induced defense among Norway spruce clones and trade-offs in resistance against a fungal and an insect pest." Frontiers in Plant Science 12: 962.

• Boberg, J. and N. Björklund (2021). "Temperature accumulation maps to support surveys for Agrilus anxius in Sweden.". Report: SLU.ua.2021.2.6-4739 

• Boberg, J. and N. Björklund (2021). "Is Garella musculana or Pochazia shantungensis present in Sweden?". Report: SLU.ua.2021.2.6-4280 

• Boberg, J. and N. Björklund (2021). "Coccotrypes cyperi-distribution, host plants and potential establishment in Sweden and the Nordic region.". Report: SLU.ua.2021.2.6-1449 

• Boberg, J. and N. Björklund (2021). "Assessment of the potential impact of Trichoferus campestris (Coleoptera; Cerambycidae) in Sweden.". Report: SLU.ua.2021.2.6-2872 

• Björklund, N. and J. Boberg (2021). "Quick assessments of the potential for establishment in Sweden for a selection of quarantine pests.". Report: SLU ua 2020.2.6-4656 

• Björklund, N. and J. Boberg (2021). "Feedback on a list of plant pests with candidates for risk assessments.". Report: SLU.ua.2021.2.6-2603 

• Balogh, S., et al. (2021). "Population size estimation for the Warren root collar weevil, Hylobius warreni Wood (Coleoptera: Curculionidae), a pest of regenerating lodgepole pine plantations." Journal of the Entomological Society of British Columbia 118: 12-18.

2020
• Marinova ‐ Todorova, M., Björklund, N., Boberg, J., Fl ø , D., Tuomola, J., Wendell, M., & Hannunen, S. (2020) Screening potential pests of Nordic coniferous forests associated with trade in ornamental plants. EPPO Bulletin 50 (2), 314-332.

• Mageroy , M. H., Christiansen, E., Långström, B., Borg ‐ Karlson, A. K., Solheim, H., Bj ö rklund, N., Zhao, T., Schmidt, A. Fossdal , C.G. & Krokene , P. (2020). Priming of inducible defenses protects Norway spruce against tree ‐ killing bark beetles. Plant, Cell & Environment, 43: 420-430.

• Fedderwitz , F., N. Björklund, R. Anngren , A. Lindström & G. Nordlander (2020). Can methyl jasmonate treatment of conifer seedlings be used as a tool to stop height growth in nursery forest trees? New Forests 51(3): 379-394.

• Boberg, J. and N. Björklund (2020). "Potential establishment of the priority pest Rhagoletis pomonella in Sweden.". Report: SLU.ua.2020.2.6-1711

• Boberg, J. and N. Björklund (2020). "Potential establishment of the priority pest Conotrachelus nenuphar in Sweden.". Report: SLU ua 2020.2.6-1710 

• Boberg, J. and N. Björklund (2020). "Potential establishment of the priority pest Bactericera cockerelli in Sweden.". Report: SLU.ua.2020.2.6-1708

• Björklund, N. and J. Boberg (2020). "Rapid Pest Risk Analysis Agrotis infusa.". Report: SLU.ua.2020.2.6-2597 

• Björklund, N. and J. Boberg (2020). "Potential establishment of the priority pest Popillia japonica in Sweden.". Report: SLU ua 2020.2.6-1707

• Björklund, N. and J. Boberg (2020). "Potential establishment of the priority pest Anthonomus eugenii in Sweden.". Report: SLU ua 2020.2.6-1707

• Björklund, N. and J. Boberg (2020). "Khapra beetle (Trogoderma granarium) An evaluation of the information regarding its presence in Sweden.". Report: SLU ua 2020.2.6-3678

• Balogh , S. L., Björklund, N., Huber, D. P., & Lindgren, B. S. (2020). Random and directed movement by Warren root collar weevils (Coleoptera: Curculionidae), relative to size and distance of host lodgepole pine trees. Journal of Insect Science, 20(4), 9.

2019
• López-Villamor , A., Carreño , S., López-Goldar , X., Suárez -Vidal, E., Sampedro , L., Nordlander, G., Björklund, N. & Zas , R. (2019). Risk of damage by the pine weevil Hylobius abietis in southern Europe: Effects of silvicultural and landscape factors.  Forest Ecology and Management 444: 290-298.

• EPPO (2019) Pest Risk Analysis for Agrilus fleischeri (Coleoptera: Buprestidae) . EPPO, Paris. Report: 19-25045, 75p.

• EPPO (2019) Pest Risk Analysis for Agrilus bilineatus (Coleoptera: Buprestidae), two-lined chestnut borer . EPPO, Paris. Report: 19-25044, 72p.

• Björklund, N. and J. Boberg (2019). "Meloidogyne chitwoodi, M. fallax and M. hapla–resistance of plants relevant in Swedish cropping systems.". Report: SLU ua 2018.2.6-3479 

• Björklund, N. and J. Boberg (2019). "Callidiellum rufipenne a new longhorn beetle for Sweden–risks associated with a potential establishment.". Report: SLU ua 2019.2.6-2532 

2018
• Öhrn, P., et al. (2018). "Occurrence, performance and shoot damage of Tomicus piniperda in pine stands in southern Sweden after storm‐felling." Journal of Applied Entomology 142(9): 854-862.

• Widenfalk, O., Jakobsson, M., Hammarström, A., Widenfalk, L. (2018). Trade and production of plants and plant products in Sweden - A knowledge base for pest risk analysis. Technical Report, External project leaders Björklund, N., Boberg, J. Greensway and SLU, pp 40. (Note there is an updated version here

• Wallertz, K., et al. (2018). "Comparison of different site preparation techniques: quality of planting spots, seedling growth and pine weevil damage." New Forests 49(6): 705-722.

• Wallertz, K., Björklund, N., Hjelm, K., Petersson, M. & Sundblad, L.-G. (2018). Comparison of different site preparation techniques: quality of planting spots, seedling growth and pine weevil damage. New Forests 49(6), 705-722. 

• Puentes , A., K.-A. Högberg , N. Björklund and G. Nordlander (2018). Novel avenues for plant protection: Plant propagation by somatic embryogenesis enhances resistance to insect feeding. Frontiers in Plant Science 9(1553) .

• Fedderwitz , F., Björklund, N., Ninkovic , V. & Nordlander, G. (2018). Does the pine weevil (Hylobius abietis ) prefer conifer seedlings over other main food sources? Silva Fennica 52(3): article id 9946 (9 pp .). https://doi.org/10.14214/sf.9946

• EPPO (2018) Pest risk analysis for Massicus raddei . EPPO, Paris.

• Boberg, J. and N. Björklund (2018). "Utlåtande om Aromia bungii med anledning av förslag till nödåtgärdsbeslut.". Report: SLU.ekol.2018.2.1.1-5 

• Boberg, J. and N. Björklund (2018). "Synchytrium endobioticum–utvärdering av metoden för bestämning av olika raser av potatiskräfta.". Report: SLU ua 2018.2.6-1762 

• Boberg, J. and N. Björklund (2018). "Synchytrium endobioticum–pathotypes, resistance of Solanum tuberosum and management.". Report: SLU ua 2018.2.6-1762 

• Boberg, J. and N. Björklund (2018). "Saperda tridentata-risks associated with trade of wood of Ulmus spp.". Report: SLU ua 2018.2.6-971 

• Boberg, J. and N. Björklund (2018). "Assessment of Spodoptera frugiperda–likelihood of establishment and host plants relevant in surveys.". Report: SLU ua 2018.2.6-218 

• Boberg, J. and Björklund, N. (2018) Utlåtande om Aromia bungii med anledning av förslag till nödåtgärdsbeslut. Report: SLU.ekol.2018.2.1.1-5 

• Björklund, N. and J. Boberg (2018). "Follow up assessment–future regulatory status of Phytophthora ramorum.". Report: SLU ua 2018.2.6-972, Version 2 

• Björklund, N. and J. Boberg (2018). "Evaluation of the methodology proposed for identifying priority pests in EU.". Report: SLU ua 2018.2.6-836 

2017
• Zas , R., Björklund, N., Sampedro , L. et al. (2017) Genetic variation in resistance of Norway spruce seedlings to damage by the pine weevil Hylobius abietis. Tree Genetics & Genomes 13(5): 111.

• Nordlander, G., Wallertz, K., Björklund, N., Hellqvist, C. & Petersson, M. (2017). Snytbaggen. Sidorna 46-64 i: Skador på skog, del 1, Skogsskötselserien nr 12 ( Witzell , J., redaktör). Skogsstyrelsen , 113 s .

EFSA Panel on Plant Health (PLH), Jeger M, Bragard C, Caffier D, Candresse T, Chatzivassiliou E, Dehnen -Schmutz K, Gilioli G, Grégoire J-C, Jaques Miret JA, MacLeod A, Niere B, Parnell S, Potting R, Rafoss T, Rossi V, Urek G, Van Bruggen A, Van Der Werf W, West J, Winter S, Bergeretti F, Björklund N, Mosbach -Schulz O, Vos S and Navajas Navarro M. (2017). Pest risk assessment of Eotetranychus lewisi for the EU territory. EFSA Journal;15(10):4878, 122 pp . 

• Boberg, J. and Björklund, N. (2017) Utlåtande om rotgallnematoden Meloidogyne chitwoodi och dess förmåga att överleva i vatten. Report: SLU ua 2017.2.6-4109 

• Björklund, N., and Boberg, J. (2017). Rapid Pest Risk Analysis Xyleborinus attenuatus . Zenodo . http://doi.org/10.5281/zenodo.915710

• Björklund, N. and Boberg, J. (2017). Rapid Pest Risk Analysis Xylosandrus germanus . Zenodo . http://doi.org/10.5281/zenodo.915370

2016
• Maňák, V., et al. (2016). "Behavioural responses of pine weevils to non‐consumptive interactions with red wood ants." Journal of Zoology 299(1): 10-16.

• Maňák , V., Björklund, N., Lenoir, L. & Nordlander , G. (2016) Testing associational resistance against pine weevils mediated by Lasius ants attending conifer seedlings. Journal of Applied Entomology, 141: 411–416 .

• Lundborg, L., Nordlander, G., Björklund, N., Nordenhem , H. & Borg-Karlson, A.-K. (2016). Methyl jasmonate-induced monoterpenes in Scots pine and Norway spruce tissues affect pine weevil orientation.  Journal of chemical ecology 42(12): 1237-1246.

• Lundborg , A., Fedderwitz , F., Björklund, N., Nordlander , G. & Borg- Karlson , A.-K. (2016). "Induced defenses change the chemical composition of pine seedlings and influence meal properties of the pine weevil Hylobius abietis." Phytochemistry 130: 99-105.

• Lundborg, L., et al. (2016). "Conifer chemical defenses influence meal properties of the pine weevil Hylobius abietis." Thesis work

• Fedderwitz, F., et al. (2016). "Effects of jasmonate-induced resistance in conifer plants on the feeding behaviour of a bark-chewing insect, Hylobius abietis." Journal of Pest Science 89(1): 97-105.

• Björklund, N., Lindelöw, Å. & Schroeder, L.M. (2016). Erroneous conclusions about current geographical distribution and future expansion of forest insects in Northern Sweden: comments on Hof and Svahlin (2015). Scandinavian Journal of Forest Research, 31, 126-127 .

• Björklund, N (2016) Behavioural responses of pine weevils to non-consumptive interactions with red wood ants Journal of Zoology podcast, Spring/Summer 2016 (intervju)

2015
• Maňák, V., et al. (2015). "The effect of red wood ant abundance on feeding damage by the pine weevil Hylobius abietis." Agricultural and Forest Entomology 17(1): 57-63.

• Manak, V., Björklund, N., Lenoir, L. & Nordlander , G. (2015).The effect of red wood ant abundance on feeding damage by the pine weevil Hylobius abietis . Agricultural and Forest Entomology 17, 57-63 .

• Fedderwitz, F., et al. (2015). "The structure of feeding behavior in a phytophagous insect (Hylobius abietis)." Entomologia Experimentalis et Applicata 155(3): 229-239.

• Fedderwitz , F., Björklund, N., Ninkovic , V. & Nordlander, G. (2015). The structure of feeding behavior in a phytophagous insect ( Hylobius abietis ). Entomol . Exp. Appl., 155, 229-239 .

• Björklund, N., et al. (2015). "Improved forest regeneration by triggering the induced defense of conifer seedlings against bark-feeding insects."

• Björklund, N., Nordlander, G., Fedderwitz , F., Ninkovic , V. Lundborg, L., Sampedro , L. and Zas , R. (2015). Improved forest regeneration by triggering the induced defence of conifer seedlings against bark-feeding insects. P 163 in: ISCE2015, International Society of Chemical Ecology, Stockholm, Sweden 29th June – 3rd July 2015.

2014
• Öhrn, P., et al. (2014). "Seasonal flight patterns of Ips typographus in southern Sweden and thermal sums required for emergence." Agricultural and Forest Entomology 16(2): 147-157.

• Öhrn, P., Långström, B., Lindelöw, Å., Björklund, N. (2014) Seasonal flight patterns of Ips typographus in southern Sweden and thermal sums required for emergence. Agriculture and Forest Entomology, 16, 147 – 157 . [ FULL TEXT ] Zas R., Björklund N., Nordlander G., Cendán C., Hellqvist C. & Sampedro L. (2014). Exploiting jasmonate-induced responses for field protection of conifer seedlings against a major forest pest, Hylobius abietis . Forest Ecology and Management, 313, 212-223. [ FULL TEXT ] [ AUDIO SLIDE ]

• Zas, R., et al. (2014). "Exploiting jasmonate-induced responses for field protection of conifer seedlings against a major forest pest, Hylobius abietis." Forest Ecology and Management 313: 212-223.

• Terenius, O., et al. (2014). "Premature proposal of the pine weevil as a vector of a human pathogen." Journal of clinical microbiology 52(11): 4115-4115.

• Terenius , O., Björklund, N., Jaenson , T. G. T. & Nordlander , G. (2014). Premature proposal of the pine weevil as a vector of a human pathogen. Journal of Clinical Microbiology 52: 4115.

• Mayer, F., et al. (2014). "Mitochondrial DNA haplotypes indicate two postglacial re‐colonization routes of the spruce bark beetle Ips typographus through northern Europe to Scandinavia." Journal of zoological systematics and evolutionary research 52(4): 285-292.

• Mayer F., Björklund N., Wallén J., Långström B. & Cassel- Lundhagen A. (2014). Mitochondrial DNA haplotypes indicate two postglacial re-colonization routes of the spruce bark beetle Ips typographus through northern Europe to Scandinavia. Journal of Zoological Systematics and Evolutionary Research 52, 285–292 .

• Fedderwitz F., Björklund N., Ninkovic V. & Nordlander G. (2014). Diel behaviour and time budget of the adult pine weevil Hylobius abietis . Physiological Entomology, 39, 103 -110.

• Fedderwitz , F., Nordlander , G., Ninkovic , V. and Björklund, N. (2014) Effects of methyl jasmonate treatment of conifer seedlings on pine weevil feeding SIP15 – 15th International Symposium on Insect-Plant Relationships University of Neuchâtel, Switzerland, 17-22 August, 2014. p. 145

• Djurle , A., Björklund, N. (2014). SLU:s undervisning inom växtskyddsområdet. Uppdrag från Plattformen för växtskydd, Dnr: SLU ua 2015.1.1.1-68, sid 1-296 .

• Björklund, N. (2014) Tidernas största barkborreattack – Orsakad av Contortabastborren . Excellent Magasin för skogsägare, Stora Enso, p. 22-23 (intervju).

• Björklund, N, Hellqvist, C. Härlin , C., Johansson, K., Nordlander, G. and Wallertz, K., (2014) Snytbaggen – åtgärder för lyckade planteringar. Tryckt broschyr som också finns tillgänglig på http://pub.epsilon.slu.se/11687/ [länk]

2013
• Zas, R., et al. (2013). "Moving to the field: effective protection of conifer seedlings against a forest pest by eliciting jasmonate-induced resistance." Moving to the field: effective protection of conifer seedlings against a forest pest by eliciting jasmonate-induced resistance. 89: 277-281.

• Zas, R., Björklund, N., Nordlander, G., Cendán, C., Hellqvist, C. & Sampedro, L. (2013) Moving to the field: effective protection of conifer seedlings against a forest pest by eliciting jasmonate-induced resistance. Proceedings: Induced resistance in plants against insects and diseases, Avignon, France, 10-13 June 2013. ISBN 978-92-9067-267-8. IOBC-WPRS Bulletin 89: 277-281 .

• Maňák, V., et al. (2013). "Ants protect conifer seedlings from feeding damage by the pine weevil Hylobius abietis." Agricultural and Forest Entomology 15(1): 98-105.

• Manak, V., Nordenhem , H., Björklund, N., Lenoir, L. & Nordlander , G. (2013). Ants protect conifer seedlings from feeding damage by the pine weevil Hylobius abietis . Agricultural and Forest Entomology 15: 98-105 .

• Björklund, N & Nordlander , G (2013) New method triggers the defense of seedlings against pine weevils. ( pressmeddelande )

2012
• Öhrn, P, Björklund, N, Lindelöw, Å., Långström, B. (2012) Ta ut vindfällda granar i rätt tid. SkogsEko , 4, p. 43 .

• Zhao, T., et al. (2012). "Fungal inoculation and methyl jasmonate application induced highly variable terpene accumulation in Norway spruce." Mezzinatne (Latvia).

• Zhao, T., Krokene P., Björklund N., Erbilgin N., Christiansen E., Långström B., Solheim H., Borg- Karlson , A.-K. (2012) Fungal inoculation and methyl jasmonate application induce highly variable terpene accumulation in Norway spruce. Genetic Aspects of Adaptation and Mitigation: Forest Health, Wood Quality and Biomass Production; Riga, Latvia; 3-5 October 2012. Poster

• Zhao T, Krokene P, Hu J, Christiansen E, Björklund N, et al. (2012) Ceratocystis polonica induced terpene accumulation in Norway spruce is negatively correlated to colonization of Ips typographus , 28th ISCE Annual Meeting, Vilnius, Lithuania, July 22-26, p. 160

• Lundborg L, Moreira X, Zas R, Sampedro L, Björklund N, Hellqvist C, Nordlander G, and Borg-Karlson A-K. (2012) Chemical analysis of methyl jasmonate treated Scots pine Pinus sylvestris using GC-MS and LC-MS. 28th ISCE Annual Meeting, Vilnius, Lithuania, July 22-26, p. 44

• Fedderwitz, F., et al. (2012). "Pine weevil (Hylobius abietis) feeding pattern on conifer seedlings." Proceedings of Measuring Behavior, Utrecht, The Netherlands, August 28–31: 333-337.

• Björklund, N. (2012) Inget entydigt resultat av ombehandlingar. SkogsEko , 2, p. 42 .

2011
• Zhao T, Krokene P, Hu J, Christiansen E, Björklund N, et al. (2011) Induced terpene accumulation in Norway Spruce inhibits bark beetle colonization in a dose-dependent manner. PLoS ONE 6(10): e26649 .

• NN (2011) Pest insect article is most downloaded. Press release from SLU

• Lindgren, S., Björklund, N., Carroll, A., Cudmore , T. (2011) Increased susceptibility and suitability of naïve lodgepole pine to mountain pine beetle. North American Forest Insect Work Conference, Portland, May 9-12, 2011.

• Krokene , P., Solheim, H., Christiansen, E., Zhao, T., Hu, J., Borg-Karlson, A.-K., Björklund, N., Långström, B. (2011) Terpener – viktiga för försvar mot barkborrar. SkogsEko , 4, p. 42 .

• Björklund, N. & Långström, B. (2011) Terpener stoppar granbarkborren, Notiser från SLU, 5, 1.

• Björklund, N (2011) Trees defend themselves chemically against attacks by the spruce bark beetle ( pressmeddelande ) Published in Forskning.se, Skogsaktuellt.se, Natursverige.se, ATL, och SKOG & framtid.

• Björklund, N (2011) Trees defend themselves chemically against attacks by the spruce bark beetle ( press release ) Published in Forskning.se, Skogsaktuellt.se, Natursverige.se, ATL, och SKOG & framtid.

• Björklund, N (2011) I skuggan av bastborrarna. Vi Skogsägare, 4, 36. ( interview ).

2010
• Zhao, T., Krokene , P., Björklund, N., Långström , B., Solheim , H. Christiansen, E. & Borg- Karlson , A.-K. (2010) The influence of Ceratocystis polonica inoculation and methyl jasmonate application on terpene chemistry of Norway spruce, Picea abies . Phytochemistry 71, 1332-1341.

• Niklas, B. and L. Bo (2010). "Ingen effekt av enstaka fällgrupper." Skogseko(1).

• Långström, B., Isacsson, G., Björklund, A., Björklund, N. (2010) Utvärdering av storskalig barkborrebekämpning med feromonfällor. Slutrapport till Skogsstyrelsen 12p .

• Långström, B. and N. Björklund (2010). "Så har bekämpningen av granbarkborren lyckats." Skogseko(1).

• Långström, B. & Björklund, N. (2010) Så har bekämpningen av granbarkborren lyckats, SkogsEko , bilaga insektsskador, 1, 8-9 . Långström, B., Isacsson, G., Björklund, A., Björklund, N. (2010) Utvärdering av storskalig barkborrebekämpning med feromonfällor. Slutrapport till Skogsstyrelsen 12p .

• Larsson, P.-E., et al. (2010). "A large-scale experiment to control the spruce bark beetle Ips typographus using pheromone-baited trap logs in Sweden."

• Larsson, P.-E., Björklund, N., Långström, B., Gustavsson, K. & Örlander , G. (2010) Granbarkborrar, fångstvirkesfällor och angripen skog. Infoblad Skogsstyrelsen, 1-4 . Björklund, N. & Långström, B. (2010) Kompletterande studier inom projektet ”Effekt av fångstvirkesfällor på näraliggande skog 2008”, Slutrapport till Södra Skogsägarnas Stiftelse för Forskning, Utveckling och Utbildning. 23 p.

• Klingenberg, M. D., et al. (2010). "Seeing the Forest Through the Trees: Differential Dispersal of Hylobius warreni Within Modified Forest Habitats." Environmental Entomology 39(3): 898-906.

• Klingenberg , M.D., Björklund, N. & Aukema , B.H. (2010) Seeing the forest through the trees: differential dispersal of Hylobius warreni Wood within modified forest habitats. Environmental Entomology 39, 898-906 . [ Hela manuset ]

• Cudmore, T.J., Björklund, N., Carroll, A.L. & Lindgren, B.S. (2010) Climate change and range expansion of an aggressive bark beetle: evidence of higher reproductive success in naïve host tree populations. Journal of Applied Ecology 47, 1036–1043. This article was rated as one of the “Top-read articles” in 2010 with 5,450 downloads.

• Zhao, T., Krokene, P., Björklund, N., Långström, B., Solheim, H. Christiansen, E. & Borg-Karlson, A.-K. (2010) The influence of Ceratocystis polonica inoculation and methyl jasmonate application on terpene chemistry of Norway spruce, Picea abies . Phytochemistry 71, 1332-1341. [ FULL TEXT ]

• Björklund, N., et al. (2010). "Det går dåligt för granbarkborrarna i södra Sverige i år."

• Björklund, N. (2010). "Varmare klimat orsakar förödande utbrott av skadeinsekter i nya områden."

• Björklund, N. (2010) Vädret gynnar trädens försvar, ATL Lantbrukets Affärstidning, 2 juli, 2 p. ( interview ). Björklund, N & Långström, B. (2010) Enstaka grupper med granbarkborrefällor ger ingen effekt, SkogsEko , bilaga insektsskador, 1, 12 .

• Björklund, N. (2010) Snytbaggen gillar inte plantor på mineraljord. Press release from SLU based on my associate professorship lecture.

• Björklund, N. (2010) Har du sett angrepp av jättebastborren? Entomologisk Tidskrift, 131, 136 .

• Björklund, N. & Långström, B. (2010) Kompletterande studier inom projektet ”Effekt av fångstvirkesfällor på näraliggande skog 2008”, Slutrapport till Södra Skogsägarnas Stiftelse för Forskning, Utveckling och Utbildning. 23 p.

• Björklund, N (2010) Varmare klimat orsakar förödande utbrott av skadeinsekter i nya områden. P ressmeddelanderelease från SLU . Published in Skogsaktuellt, MiljöAktuellt , Sveriges Radio, Oddasat , Forskning.se, and ATL.

• Björklund, N & Långström, B. (2010) Enstaka grupper med granbarkborrefällor ger ingen effekt, SkogsEko , bilaga insektsskador, 1, 12 .

• Björklund, N & Lindgren, B.S. (2010) Basal area – a measure with limited ecological significance for phloem feeding insects. Chapter 6, pp. 151-156 In Insect Habitats: Characteristics, Diversity and Management. Edited by Editors: Edina L. Harris and Newell E. Davies, Nova Science Publishers, Inc., Hauppauge, New York, USA, ISBN: 978-1-60876-396-2. [ BOOK ABSTRACT ] [ CHAPTER ABSTRACT ]

2009
• Öhrn , P., Långström , B. & Björklund, N. (2009) Flight activity of the spruce bark beetle Ips typographus in southern Sweden. In: Kunca A, Zubrik M (eds.) Insects and Fungi in Storm Areas. Proceedings of the IUFRO Working Party 7.03.10 Methodology of Forest Insect and Disease Survey in Central Europe, workshop held on September 15-19, 2008, Štrbské Pleso , Slovakia, p. 148 .

• Malm, H. & Björklund, N. (2009) Granbarkborrar i naturreservat kan bekämpas med barkning. Pressmeddelande från Länsstyrelsen Hallands Län .

• Långström B, Lindelöw Å, Schroeder M, Björklund N, Öhrn P (2009) The spruce bark beetle outbreak in Sweden following the January -storms in 2005 and 2007. In: Kunca A, Zubrik M (eds.) Insects and Fungi in Storm Areas. Proceedings of the IUFRO Working Party 7.03.10 Methodology of Forest Insect and Disease Survey in Central Europe, workshop held on September 15-19, 2008, Štrbské Pleso , Slovakia, p. 13-19 .

• Larsson, P.-E., et al. (2009). Granbarkborrar, fångstvirkesfällor och angripen skog. Skogskonferensen, 2009.

• Cudmore , T., Björklund, N., Carroll, A.L. & Lindgren, B.S. (2009) Population dynamics-implications of range expansion by the mountain pine beetle into naïve lodgepole pine populations. AGM, Professional Pest Management Association of BC, February 17, 2009.

• Björklund, N., Öhrn , P., & Långström , B. (2009) Mass trapping of the spruce bark beetle Ips typographus – Catch efficiency of baited trap-logs relative to plastic pheromone traps. In: Kunca A, Zubrik M (eds.) Insects and Fungi in Storm Areas. Proceedings of the IUFRO Working Party 7.03.10 Methodology of Forest Insect and Disease Survey in Central Europe, workshop held on September 15-19, 2008, Štrbské Pleso , Slovakia, p. 149-150 .

• Björklund, N., Lindgren, B.S., Shore, T.L. & Cudmore , T. (2009) Source or sink stands – Can stand parameters be used to predict mountain pine beetle brood production with enough precision to be useful for assigning treatment priorities? Natural Resources Canada, Canadian Forest Service, Pacific Forestry Centre, Victoria, BC. Mountain Pine Beetle Working Paper 2008-03, ISBN 978-0-662-47878-2, 12 p .

• Björklund, N., B.S. Lindgren, T.L. Shore, & T. Cudmore (2009) Can predicted mountain pine beetle net production be used to improve stand prioritization for management? Forest Ecology and Management 257, 233–237 .

• Björklund, N. B. N. and B. S. L. B. Lindgren (2009). "Diameter of lodgepole pine and mortality caused by the mountain pine beetle: factors that influence their relationship and applicability for susceptibility rating." Canadian journal of forest research 39(5): 908-916.

• Björklund, N. (2009). "Utvärdering av barkning av vindfälld gran som en bekämpningsåtgärd mot granbarkborre." Institutionen för Ekologi, SLU.

• Björklund, N. (2009). "Non-destructive tree-trunk funnel trap for capturing Hylobius warreni (Coleoptera: Curculionidae) ascending stems of trees." The Canadian Entomologist 141(4): 422-424.

• Björklund, N. (2009) Skadad bark hämmar förökning. SkogsLand nr. 10, p. 5. ( interview ).

• Björklund, N. (2009) Effektivare barkning minskar borreangrepp. Skogsland, nr.10, p. 5. ( interview ).

• Björklund, N. & Schroeder, M. (2009) Utvärdering av "Sök och plock - sommar" - Slutrapport till Skogsstyrelsen 12 p .

• Björklund, N. & Långström, B. (2009) Misslyckade angrepp av granbarkborrar - Slutrapport till Skogsstyrelsen 11 p .

• Björklund, N. & Lindgren, B.S. (2009) Diameter of lodgepole pine and mortality caused by the mountain pine beetle: factors that influence their relationship and applicability for susceptibility rating. Canadian Journal of Forest Research 39, 908-916.

2008
• Öhrn , P., Klingenberg , M., Hopkins, G. & Björklund, N. (2008) Two non-destructive techniques for determining the sex of live adult Hylobius warreni . The Canadian Entomologist 140, 617-620.

• Niklas, B., et al. (2008). Mass trapping of the spruce bark beetle IPS typographus: catch efficiency of baited trap-logs relative to plastic pheromone traps. IUFRO Methodology of Forest Insect and Disease Survey in Central Europe.

• Effektivt med fångstvirkesfällor (2008) Södra kontakt, issue 1, p. 13.

• Björklund, N., et al. (2008). "Mountain Pine Beetle Project# 3.20."

• Björklund, N., Hannrup , B. & Jönsson, P. (2008) Effekter av förhöjt knivtryck i skördaraggregat på barkskadorna hos massaved och följdeffekter på produktionen av granbarkborrar. Arbetsrapport från Skogforsk nr 668, 36 p .

• Björklund, N. (2008). "Hur effektiva är fångstvirkeshögar?" Skogseko.

• Björklund, N. (2008). "Cues for shelter use in a phytophagous insect." Journal of insect behavior 21(1): 9-23.

• Björklund, N. (2008) Utvärdering av barkning av vindfälld gran som en bekämpningsåtgärd mot granbarkborre. Rapport till Länsstyrelserna i Hallands och Jönköpings län, 4 p .

• Björklund, N. (2008) Hur effektiva är fångstvirkeshögar? SkogsEko 3, 6-7 .

• Björklund, N. & Långström, B. (2008) Hur effektiva är fångstvirkeshögar? - Slutrapport till Skogsstyrelsen från projektet ”Jämförelse av fångsteffekt mellan feromonfällor och fångstvirkesfällor” 12 p.

2007
• Långström, B. & Björklund, N. (2007) Kan man minska granbarkborreskador med fångstvirkesfällor? Rapport till Skogsstyrelsen, 12 p..

2006
• Björklund, N. (2006) Sensory cues for shelter use . In N. Kamata , A.M. Liebhold , D.T. Quiring & K.M. Clancy (Eds.) Forest Insect Population Dynamics and Host Influences Proceedings IUFRO Kanazawa 2003. p. 139.

2005
• Nordlander , G., Bylund, H. & Björklund, N. (2005) Soil type and microtopography influencing feeding above and below ground by the pine weevil Hylobius abietis . Agricultural and Forest Entomology 7, 107-113 .

• Björklund, N., Nordlander , G. & Bylund, H. (2005) Olfactory and visual stimuli used in orientation to conifer seedlings by the pine weevil Hylobius abietis . Physiological Entomology 30, 225-231 . [ Hela manuset ]

2004

• Björklund, N. (2004) Snytbaggens “torgskräck” ren myt, SkogsEko 2/2004, ( interview )

• Björklund, N. (2004) Movement behaviour and resource tracking in the pine weevil Hylobius abietis. Doctoral Thesis, Swedish University of Agricultural Sciences, Uppsala. Acta Universitatis Agriculturae Sueciae, Silvestria 302, ISSN 1401-6230, ISBN 91-576-6536-2. p. 1-17.

2003
• Björklund, N., et al. (2003). Pine weevil: host-plant acceptance on mineral soil and humus. IUFRO-Forest Insect Population Dynamics and Host Influences.

• Björklund, N., et al. (2003). "Host‐plant acceptance on mineral soil and humus by the pine weevil Hylobius abietis (L.)." Agricultural and Forest Entomology 5(1): 61-66.

• Björklund, N., Nordlander , G. & Bylund, H. (2003) Host-plant acceptance on mineral soil and humus by the pine weevil Hylobius abietis (L.). Agricultural and Forest Entomology 5, 61-65 . 

2001
• Björklund, N & Nordlander, G. (2001) Snytbaggen hittar alla plantor!, PLANT aktuellt, 1, 5 .

2000
• Rintamäki, P.T., Höglund, J., Karvonen, E., Alatalo, R.V., Björklund, N., Lundberg, A., Rätti, O. & Vouti, J. (2000) Combs and sexual selection in black grouse (Tetrao tetrix). Behavioral Ecology, 11, 465-471.