Bitou bush control

Page last updated: Monday, 17 September 2018 - 11:56am

Control methods for bitou bush (Chrysanthemoides monilifera subsp. rotundata) a declared pest in Western Australia.

REPORT THE PRESENCE OF THIS DECLARED PEST BEFORE UNDERTAKING CONTROL

Inormation about this pest can be found on the bitou bush: declared pest page.

Chemical requirements

When using any agricultural chemicals please ensure that you always follow instructions on the label and any permit. Users of agricultural chemical products must always strictly comply with the directions on the label and the conditions of any permit. To view permits or product labels go to the Australian Pesticides and Veterinary Medicines Authority website.

Chemical control options

Chemical control options can be found below. For other methods of control please refer to the aquatic weed control page, and the declared plant control handbook.

Recommended herbicides

  • Metsulfuron
  • Picloram
  • Glyphosate
  • Trounce®

Herbicide: Metsulfuron (Group B) (various trade names: see APVMA link)

Active ingredient

600g/kg metsulfuron methyl

Rate of dilution for spot spraying

1g/10L

Rate of product/10L water

1g

Wetting agent

BS 1000 @ 1:1000 or Pulse @ 1:500

Time of application

When bushes actively growing

Remarks and other control methods

  • spray to thoroughly wet all foliage
  • minimise contact with desirable plants.

Herbicide: Picloram (Group I) (various trade names: see APVMA link)

Active ingredient

75g/L picloram + 300g/L 2,4-D

Rate of dilution for spot spraying

1:150

Rate of product/10L water

65mL

Time of application

Flowering and fruiting

Remarks and other control methods

  • high volume: thorough coverage essential
  • seedlings controlled by 20mL bromoxynil10/L of water. Seedlings and adult plants controlled by 50mL 2,4-D amine10/L of water after cutting
  • glyphosate at 150mL10/L of water is also useful
  • biological control: moth (Comostolopsis germana) released in NSW.

Herbicide: Glyphosate (Group M) (various trade names: see APVMA link)

Active ingredient

  • 360g/L glyphosate
  • 490/500g/L glyphosate
  • 540g/L glyphosate
  • 680g/kg glyphosate

Other concentrations of glyphosate available

Rate of product/10L water

  • 100mL of the 360g/L formulation
  • 70mL of the 490/500g/L formulation
  • 65mL of the 540g/L formulation
  • 50g of the 680g/kg formulation

Adjust rates for another concentrations of glyphosate

Rate of product/ha

Not recommended

Wetting agent dilution

Pulse 20mL/10L

Time of application

Actively growing: best results achieved at peak flowering

Remarks

  • use half rate on smaller plants: e.g. 50mL of 360g/L formulation or equivalent rate of other formulations.
  • do not treat drought stressed plants.
  • Roundup® Biactive or Razor® are preferred products in wet areas or near shallow water, as these contain surfactants that are of low toxicity to aquatic animals
  • there are other formulations of glyphosate that are approved for use near aquatic areas: check labels before using.

Herbicide: Trounce®

Active ingredient

10g/kg metsulfuron methyl (Group B) + 835g/kg glyphosate (Group M)

Rates of dilution for spot spraying

173g (1 packet)/100L

Wetting agent

1:1000 non-ionic surfactant such as BS-1000

Time of application

Actively growing

Remarks

  • wet foliage thoroughly
  • minimise contact with desirable species
  • the use of the wetting agent Pulse® @ 20mL/10L water may improve control.

Contact information

Pest and Disease Information Service (PaDIS)
+61 (0)8 9368 3080