Spiny rush

Juncus acutus
spiny_rush_1_-_Juncus_acutus_fruto.jpg

Weed profile

  • Perennial
  • Grass
  • Hinders movement
  • Habitat: pastures, wetlands

Impact

Invades wetlands and pasture. Unpalatable and obstructs movement.

Description

  • Perennial forming large tussocks.
  • Leaves cylindrical, rigid, ending in a sharp spine.
  • Flowers brownish green in dense clusters.
  • Seed capsules egg-shaped but pointed, about 5 mm long.

Control options

  • chemical control

    glyphosate (360g/L)

    When: Wiper, while actively growing.

    Where: Pastures and non-crop areas.

  • physical control

    Cultivation

    When: Any time

    Where: Pastures and before cropping.

  • physical control

    Slashing

    When: Summer

    Where: Any.

  • physical control

    Manual removal

    When: Any time

    Where: Any.

glyphosate (360g/L)

Application Method: Wiper

Application Rate: 1L/2L

Product Name: Roundup Biactive®

Herbicide Group: 9

Situation: Pastures and non-crop areas.

Timing: Wiper, while actively growing.

Comments: Non-selective. Where there is a large proportion of dead foliage, pre-slashing is recommended. Allow adequate re-growth before treatment. Best results are achieved at lower speeds and where two applications are made in opposite directions (double pass). Add an organosilicone surfactant.

Legal Status: Registered

Cultivation

Situation: Pastures and before cropping.

Timing: Any time

Comments: Effective on young rushes.

Slashing

Situation: Any.

Timing: Summer

Comments: Slash using hedge trimmer with the blade set close to the ground. Follow up with glyphosate to control regrowth.

Manual removal

Situation: Any.

Timing: Any time

Comments: Grub individual plants. Bag to minimise seed spread. Monitor site and undertake follow up control as necessary.

Legal requirements in each region

To find out which landscape region you're in visit the NatureMaps website.
Alinytjara Wiluṟara
Eyre Peninsula
Green Adelaide
Hills and Fleurieu
Kangaroo Island
Limestone Coast
Murraylands and Riverland
Northern and Yorke
South Australian Arid Lands