 |
|
|
 |
|
|
|
|
|
Polygonum cuspidatum Sieb. & Zucc. (=Fallopia japonica (Houtt. Dcne.) (herbacée, arbuste)  |
|
|
Détails de cette espèce dans France Statut: Exotique
Statut d'envahissement: Envahissant
Occurrence: Signalé(e)
Source: AME, 2004 Date d'introduction:
Mode d'Introduction: Intentionnelle Notes sur l'espèce pour cette localité:
F. japonica was introduced intentionally to France in 1939 as decorative plants. It is present throughout France. It is more common than the Sakhaline Knotgrass (F. sachalinensis), which was introduced to Europe in 1869. It flowers from August to October. It seldom sets viable seeds in the Mediterranean climate in Europe, as it flowers too late in the year. Notes sur la gestion de l'espèce dans cette localité:
AME (2004) lists out management options for the control of F. japonica. F. japonica is considered invasive and is therefore no longer marketed as an ornamental species. Mowing seems to be effective if it is repeated seven or eight times a year over a four to seven year period. A dense plantation of species such as hazel, charcoals, willows, alders and ashes, combined with manual removal of F. japonica once a month gave positive results after three years in an experimental trials undertaken in Besançon and Villette-les-Arbois in Jura. The use of weedkillers is only a temporary measure, and cannot be used on a large scale. Impacts:
Agricole: Blockages in rivers caused by F. japonica impacts on irrigation to fields.
Interaction avec d'autres espèces envahissantes: The hybrid Fallopia X bohemica is common in France, produced by crosses of Fallopia japonica and F. sachalinensis.
Modification de l'hydrologie: F. japonica contributes to the erosion of riverbanks and causes blockages to rivers in autumn when dry stems are carried by the current.
Modification des modes de succession: F. japonica disturbs the natural regeneration of alluvial forests (alders, willows, ashes). Dernière mise à jour: 4/10/2004 11:29:21 a.m.
|
|
|
|
 |
|
