A 10-year strategy outlining the management of freshwater pest plants in the Western South Island Operational Region.
The current presence and incursion risk of invasive freshwater macrophytes within the West Coast Tai Poutini region is having a detrimental effect on the region’s unique biodiversity, cultural, recreational, and commercial values. The species of particular interest include: lagarosiphon (Lagarosiphon major), egeria (Egeria densa), elodea (Elodea canadensis) and parrot’s feather (Myriophyllum aquaticum).
The ongoing incursion risk of hornwort (Ceratophyllum demersum) is also of interest. Due to high recreational use, limited data management and the current lack of a substantial control programme, the risk of spread and new incursions is high in the West Coast Tai Poutini Region, which significantly increases the urgency for prompt implementation of consistent surveillance and control works.