Reassessment using the Prioritization process for invasive alien plants of 11 alien plants on the EPPO Observation List
In 2022/23, the EPPO Panel on Invasive Alien Plants re-assessed 11 species from the EPPO Observation List using the EPPO Standard PM 5/6 EPPO Prioritization process for invasive alien plants. The Observation List contains plant species (absent or present in the EPPO region) which present a medium risk to the EPPO region. A species is included in this list if the species has: 1) a medium or high rate of spread coupled with a medium impact; or 2) a low or medium rate of spread coupled with a high impact. The species were re-assessed following a literature search on newly published information since the date of the original listing. Each species was then assessed with the prioritization process. Of the 11 species, only one species warranted being moved from the Observation List to another list. For Lupinus polyphyllus, the outcome of the prioritization process was that the species has a high rate of spread coupled with a high impact, the species colonises habitats that have a value for nature conservation. L. polyphyllus has therefore been transferred to the EPPO List of Invasive Alien Plants. All of the new prioritization reports for the species listed in Table 1 are stored in the EPPO Global Database. Additional species from the Observation List will be re-prioritized in 2023/24.
Table 1. Species re-prioritized from the EPPO Observation List
Species | Family | Native range | Originally listed in |
Asparagus asparagoides | Asparagaceae | South Africa | 2013 |
Azolla filiculoides | Salviniaceae | Americas | 2012 |
Bidens frondosa | Asteraceae | North America | 2012 |
Hygrophila polysperma | Acanthaceae | Asia | 2017 |
Limnophila sessiliflora | Plantaginaceae | Asia | 2013 |
Lupinus polyphyllus | Fabaceae | North America | 2012 |
Nassella neesiana | Poaceae | South America | 2012 |
Nassella tenuissima | Poaceae | North America | 2012 |
Nassella trichotoma | Poaceae | South America | 2012 |
Rhododendron ponticum | Ericaceae | Europe and Asia | 2012 |
Solidago nemoralis | Asteraceae | North America | 2012 |
Sources
EPPO Global Database: https://gd.eppo.int/
EPPO (2012) PM 5/6 EPPO prioritization process for invasive alien plants, EPPO Bulletin 43, 463-474.