SLU news

Are there pests associated with the trade in ornamental plants that pose a high risk to Nordic coniferous forests?

Published: 14 September 2020
A spiny moth larvae on a green leaf. Photo.

In a recently published study we screened and ranked plant pests potentially associated with trade of ornamental plants to identify pests that could pose a high risk to Nordic coniferous forests.

– We used a screening procedure, followed by a ranking procedure, to identify which species, from an initial list of 1062 pests, that are most likely to become significant pests of Picea abies or Pinus sylvestris, says Johanna Boberg.

– The rankings of the pests, together with the collected information, will be used to prioritize pests and pathways for further assessment. For example, as a result of the study, two of the pests, i.e. Chionaspis pinifoliae and Orgyia leucostigma has been added to the EPPO Alert List and have been selected for further assessment, says Niklas Björklund.

Full story

Read the full story here: Marinova‐Todorova, M., Björklund, N., Boberg, J., Flø, 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.


SLU Risk assessment of plant pests perform independent analyses which  provide support to the Swedish Board of Agriculture in their effort to counter the damage of non-indigenous pests.