Origin: South Africa
Regional Pest Management Plan (RPMP) status
- Aotea — Progressive containment
- Hauraki Gulf Controlled Area Notice pest
Annual herb < 60 cm tall. Leaves are deeply lobed and < 8 cm long. Flowers have purple/pink ray florets and yellow discs and are borne in August – May. Achenes are < 3 mm long and bear pappus < 8 mm long.
What you need to know
To help protect our environment:
- You must not breed, distribute, release or sell purple groundsel on Aotea/Great Barrier Island group.
- You must not plant purple groundsel on Aotea/Great Barrier Island group.
Auckland Council will manage purple groundsel at all sites within the Aotea/Great Barrier Island group where it is known to occur.
If you see purple groundsel anywhere on Aotea/Great Barrier Island group, please report it to Auckland Council at email@example.com.
Sand dunes, coastal habitat, gravel.
Seeds dispersed by wind.
Impact on environment
Likely to outcompete native vegetation, particularly in dune ecosystems.
Follow up treated areas 3 times per year. Encourage natural regeneration of native plants or replant treated areas where possible after 2-3 treatments to establish dense ground cover and minimise reinvasion.
Method: Dig out.
Plant parts requiring disposal: All parts.
Disposal options: Remove to greenwaste or landfill if practical.
Biocontrol is currently not available for this species.
Community agrichemical control recommendations
No qualifications: Foliar spray with 100ml glyphosate green per 10L of water.
Certified Handler/Experienced agrichemical user: Foliar spray with 100ml glyphosate green per 10L of water and 20ml penetrant.
For infestations amongst desirable species: Foliar spray with 40ml clopyralid per 10L of water and 20ml penetrant (not for use in home gardens).
Caution: When using any herbicide or pesticide please read the label thoroughly to ensure that all instructions and safety requirements are followed.