Black Wattle

Family:
Fabaceae
Origin:
Australia

General description

Tree. Leaves are dark green and bi-pinnate. Flowerheads are globose, cream, and borne in racemes July – September. Seed pods are < 90 x 7 mm and are straight or slightly curved.

What you need to know

To help protect our environment, from 1 September 2021, you:

  • will not be allowed to breed, distribute, release or sell black wattle within the Auckland region.
  • will not be allowed to plant black wattle within the Auckland region, unless you are transferring an existing plant on your land to another location within the boundaries of the same property.
  • must destroy any black wattle 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.

Shrubland, scrub, coastal areas, cliffs, riparian margins, roadsides, wasteland, grassland, plantation margins.

Seeds dispersed by gravity.

Forms dense stands, competing with other plant species in scrubland, coastal areas and riparian margins. Nitrogen fixer. Alters soil chemistry, moisture content and microbial function.

Site Management

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. Follow up treated areas 3 times per year. Crown lift to allow understory plants to establish or to underplant prior to controlling large trees.

Recommended approaches

Physical control

Method: Dig out

Plant parts requiring disposal: Seeds

Disposal options: Trees can be chipped and used as mulch, preferably when not in seed

Biocontrol

Biocontrol is currently not available for this species.

Community agrichemical control recommendations

No qualifications
Cut stump and paste freshly cut base of stems with double strength glyphosate gel
Or
Ringbark and paste cut with double strength glyphosate gel

Basic Growsafe certified
Foliar spray seedlings with 200ml glyphosate green per 10L of water
Ringbark and spray cut with 750ml glyphosate green per 1 L of water

Certified Handler/Experienced agrichemical user
Drill and inject trees with 750ml glyphosate green and 10ml penetrant per 1L of water, if safe to do so. Drill 18mm holes (tangentially angled downwards) in a spiral up the trunk. For 50mm stems drill one hole. For 100mm stems drill two holes. For larger stems drill holes 150mm apart.
Foliar spray seedlings with 200ml glyphosate green per 10L of water and 20ml penetrant

Safety notes

Large trees must not be drilled or ringbarked that are closer than 1.5 times the height of the tree from paths, walkways and property.

Trees over 4 metres in height should be removed by a qualified arborist.

CAUTION: When using any herbicide or pesticide please read the label thoroughly to ensure that all instructions and safety requirements are followed.

Search tags

RPMP status


Whole region (Sustained Control)
Hauraki Gulf Controlled Area Notice pest
Black wattle - Main species image