EPPO Global Database

EPPO Reporting Service no. 09 - 2014 Num. article: 2014/176

Update of the Black List and Watch List of invasive alien plants in Switzerland


In September 2014, the Swiss Black and Watch Lists of invasive alien plants have been revised and considerably increased. These lists, although not being part of regulations, represent useful tools for decision-making and prevention. As new species constantly arrive on the Swiss territory, these lists are revised once a year by a panel of experts. Each species is assessed with the current state of knowledge on the basis of criteria (considering vegetative and sexual reproduction, environmental impact and spread potential).
The species included in the revised Black and Watch Lists of invasive alien plants are listed below with an indication as to whether they have been newly added, along with an estimate of their current distribution in Switzerland. A datasheet is available for each species.

Black List of invasive alien plants
Species
Addition in 2014
Distribution in CH
Abutilon theophrasti (Malvaceae)
X
Limited
Ailanthus altissima (Simaroubaceae, EPPO List of Invasive Alien Plants)

Very widespread
Ambrosia artemisiifolia (Asteraceae, EPPO List of IAP)

Very widespread
Amorpha fruticosa (Fabaceae, EPPO List of IAP)
X
Limited
Artemisia verlotiorum (Asteraceae)

Very widespread
Asclepias syriaca (Apocynaceae)
X (was on the Watch List)
Limited
Buddleja davidii (Scrophulariaceae, EPPO List of IAP)

Very widespread
Bunias orientalis (Brassicaceae)
X
Widespread
Cabomba caroliniana (Cabombaceae, EPPO List of IAP)
X
Absent
Crassula helmsii (Crassulaceae, EPPO A2 List)
X (was on the Watch List)
Absent
Cyperus esculentus (Cyperaceae, EPPO List of IAP)
X (was on the Watch List)
Limited
Echinocystis lobata (Cucurbitaceae)
X
Absent
Elodea canadensis (Hydrocharitaceae)

Widespread
Elodea nuttallii (Hydrocharitaceae, EPPO List of IAP)

Widespread
Erigeron annuus (Asteraceae)
X (was on the Watch List)
Very widespread
Fallopia japonica (Polygonaceae, EPPO List of IAP)

Very widespread
Fallopia sachalinensis (Polygonaceae, EPPO List of IAP)

Limited
Fallopia x bohemica (Polygonaceae, EPPO List of IAP)

Widespread
Heracleum mantegazzianum (Apiaceae)

Very widespread
Hydrocotyle ranunculoides (Apiaceae, EPPO A2 List)
X
Absent
Impatiens glandulifera (Balsaminaceae, EPPO List of IAP)

Widespread
Lonicera henryi (Caprifoliaceae)
X (was on the Watch List)
Limited
Lonicera japonica (Caprifoliaceae)

Limited
Ludwigia grandiflora (Onagraceae, EPPO A2 List)

Absent
Ludwigia peploides (Onagraceae, EPPO A2 List)
X
Absent
Lupinus polyphyllus (Fabaceae)
X (was on the Watch List)
Limited
Myriophyllum aquaticum (Haloragaceae, EPPO List of IAP)
X
Absent
Persicaria wallichii (Polygonaceae) (=Polygonum polystachyum)

Limited
Prunus laurocerasus (Rosaceae)

Widespread
Prunus serotina (Rosaceae)

Widespread
Pueraria lobata (Fabaceae, EPPO A2 List)

Limited
Rhus typhina (Anacardiaceae)

Widespread
Robinia pseudoacacia (Fabaceae)

Very widespread
Rubus armeniacus (Rosaceae)

Limited
Senecio inaequidens (Asteraceae, EPPO List of IAP)

Widespread
Sicyos angulatus (Cucurbitaceae, EPPO List of IAP)
X
Absent
Solanum carolinense (Solanaceae)
X
Absent
Solidago canadensis (Asteraceae, EPPO List of IAP)

Very widespread
Solidago gigantea (Asteraceae, EPPO List of IAP)

Very widespread
Toxicodendron radicans (Anacardiaceae)
X
Absent
Trachycarpus fortunei (Arecaceae)
X (was on the Watch List)
Limited

Watch List of invasive alien plants
Species
Addition in 2014
Distribution in CH
Acacia dealbata (Fabaceae)
X
Limited
Cornus sericea (Cornaceae, EPPO List of IAP)

Limited
Galega officinalis (Fabaceae)
X
Limited
Helianthus tuberosus (Asteraceae, EPPO List of IAP)

Widespread
Impatiens balfouri (Balsaminaceae)

Widespread
Kochia scoparia (Amaranthaceae)

Limited
Lysichiton americanus (Araceae)

Absent
Opuntia humifusa (Cactaceae)
X
Limited
Parthenocissus inserta (Vitaceae)

Limited
Paulownia tomentosa (Paulowniaceae)

Limited
Phytolacca americana (Phytolaccaceae)

Limited
Sagittaria latifolia (Alismataceae)
X
Limited
Sedum spurium (Crassulaceae)

Limited
Sedum stoloniferum (Crassulaceae)
X
Limited
Solidago graminifolia (Asteraceae)
X
Limited
Symphoricarpos albus (Caprifoliaceae)
X
Limited
Symphyotrichum novi-belgii aggr. (Asteraceae)
X
Limited


Sources

Info Flora Website (2014) Listes et fiches d’information. http://www.infoflora.ch/fr/flore/neophytes/listes-et-fiches.html
Swiss Federal Council. Ordinance on the Handling of Organisms in the Environment (Release Ordinance, RO) of 10 September 2008 (Status as at 1st June 2012). 814.911. http://www.admin.ch/ch/e/rs/814_911/index.html#id-ni5-7