Détails de cette espèce dans New Zealand
Statut d'envahissement: Envahissant
Source: NZ DOC.
Date d'introduction: 1890's
Mode d'Introduction: Intentionnelle
Notes sur l'espèce pour cette localité:
The plant was introduced to New Zealand from India in the 1890s. It rapidly spread throughout Auckland, Coromandel and Northland. The warm moist climate of the upper North Island favoured the initial spread of the plant and it is now a problem in parts of the top of the South Island, and on the West Coast. Rhizomes form layers up to a metre thick, which other plants cannot penetrate. Hedychium gardnerianum grows up to two metres in height. It has a large cream flower with long red stamens, is strongly perfumed and produces up to 100 seeds per flower head. Of the two types of wild ginger introduced to New Zealand this is the worst, because of its successful spreading by seed. As well, the plant roots spread outwards and sprout new plants. The other wild ginger introduced to New Zealand is Hedychium flavescens.
Notes sur la gestion de l'espèce dans cette localité:
The flowers can be cut and dropped on the ground prior to the seeds being formed. This will prevent spreading by seed. Small stands of ginger can be cut out but spraying with herbicide is necessary with the more dense stands.
Compétition: Dense rhizomes prevent growth of native flora.
Dernière mise à jour: 23/09/2003 4:24:24 p.m.