Boxthorn

Family:
Solanaceae
Origin:
South Africa

General description

Densely branched, spiny, evergreen shrub < 6 m tall. Leaves are < 43 x 12 mm. Flowers are cream/purple. Fruit is fleshy and red.

What you need to know

To help protect our environment:

  • You must not breed, distribute, release or sell boxthorn within the Auckland region.
  • You must not plant boxthorn 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 boxthorn 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.

Auckland Council will control boxthorn 1) at priority sites within the Hauraki Gulf Controlled Area to protect seabirds and other species, and 2) at all sites within the Aotea/Great Barrier Island group where it is known to occur.

If you see boxthorn anywhere on Aotea/Great Barrier Island group, please report it to Auckland Council at pestfree@aucklandcouncil.govt.nz.

Coastal sites, sand dunes, gravel, cliffs, shrubland, riparian margins, wasteland, roadsides, pasture.

Seeds dispersed by birds, mammals and reptiles.

Inhibits native coastal plant regeneration, ensnares seabirds and impedes access to nesting sites. Spines can become imbedded in bone or soft tissue, causing infection and pseudo-tumours.

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.

Recommended approaches

Physical control

Method: Dig out

Plant parts requiring disposal: Seeds

Disposal options: Remove to greenwaste or landfill if practical

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
Cut stump and spray freshly cut base with 200ml glyphosate green per 1L of water
Foliar spray with 100ml glyphosate green per 10L of water

Safety notes

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.

Similar species

hawthorn
Crataegus monogyna

Hawthorn is a taller tree with multilobed triangular leaves compared with the oblong leaves of boxthorn.

barberry
Berberis glaucocarpa

Barberry is a much shorter shrub with spiny toothed leaves, yellow flowers and small purple berries.

Search tags

RPMP status


Hauraki Gulf Controlled Area pest (Site-led)
Aotea (Eradication)
Parkland with Significant Ecological Areas (Site-led)
Whole region (Sustained Control)
Waitākere
Hauraki Gulf Controlled Area Notice pest
Boxthorn - Main species image