Rubus fruiticosus agg.
Blackberry (wild aggregates)
Also known as:
Bramble, cut leaf blackberry
Regional Pest Management Plan (RPMP) status
- Whole region — Sustained control
- Hauraki Gulf Controlled Area Notice pest
Prickly, scrambling, woody perennial shrub. Rhizomes are dense and layered. Stems are < 8 m long, arching and entangling, with large backwards-pointing thorns. Leaves are compound and palmate, with three to five oval, toothed leaflets, and prickly stalks and midribs.
Flowers are white/pink and are borne in clusters November – April. Fruit is aggregated and red, ripening to black.
What you need to know
To help protect our environment:
- You must not breed, distribute, release or sell blackberry (wild aggregates) within the Auckland region.
- You must not plant blackberry (wild aggregates) within the Auckland region, unless you are transferring an existing plant on your land to another location within the boundaries of the same property.
- You must destroy any blackberry (wild aggregates) on land that you occupy if it has been planted in breach of the above rules and you are directed to do so by an authorised person.
Scrub, riparian and forest margins, shrublands, fernland, riverbeds, wetlands, sand dunes, roadsides, wasteland, pastures, orchards, plantations.
Seeds dispersed by birds, other animals, water and soil movement. Vegetative spread from rhizomes.
Impact on environment
Displaces and smothers native vegetation. Reduces pasture production and capacity and injures stock. Can dominate forestry plantations, impeding access and reducing overall yield. Host for blackberry rust Phragmidium violaceum.
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.
Check for presence of agents:
- Blackberry rust (Phragmidium violaceum) - Self-introduced.
For more information about how biocontrol works, see What is biocontrol?
Community agrichemical control recommendations
No qualifications: Cut stump and paste freshly cut base of stems with metsulfuron gel.
Basic Growsafe certified: Foliar spray with 5g metsulfuron-methyl per 10L of water.
Certified Handler/Experienced agrichemical user: Foliar spray with 5g metsulfuron-methyl per 10L of water and 20ml penetrant.
Plant has thorns.
Caution: When using any herbicide or pesticide please read the label thoroughly to ensure that all instructions and safety requirements are followed.