Ragwort control

Page last updated: Monday, 20 July 2020 - 2:20pm

Control methods for ragwort (Senecio jacobaea) a declared pest in Western Australia.

REPORT THE PRESENCE OF THIS PEST BEFORE UNDERTAKING CONTROL

Information about this pest can be found on the ragwort: declared pest page.

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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 declared plant control handbook.

Recommended herbicides

Spring; winter-spring rosette stage

  • 2,4-D LV ester
  • 2,4-D amine
  • Clopyralid
  • Picloram + 2,4 D amine

Herbicide: 2,4-D LV ester (Group I) (various trade names: see APVMA link)

Active ingredient

  1. 600g/L 2,4-D ester
  2. 680g/L 2,4-D ester

Rates of dilution for spot spraying

  1. 1:250 for 600g/L formulation
  2. 1:280 for 680g/L formulation

Amount of product/10L water

  1. 40mL for 600g/L formulation
  2. 35mL for 680g/L formulation

Rate of product/ha

  1. 3.7L for 600g/L formulation
  2. 3.3L for 680g/L formulation

Time of application

Winter-spring rosette stage

Remarks

  • Re-treatment is usually necessary
  • Care should be taken applying these near tomatoes, grape vines and plant nurseries

More information and other control methods

  • Other products such as picloram + triclopyr, e.g. Grazon™ DS @ 50mL/10L water; or fluroxypyr, e.g. Starane™ @ 30mL/10L of water. Grub individual plants.
  • Pasture improvement reduces seedling emergence.

Herbicide: 2,4-D amine (Group I) (various trade names: see APVMA link)

Active ingredient

  1. 500g/L 2,4-D amine
  2. 625g/L 2,4-D amine

Rates of dilution for spot spraying

  1. 1:250 in water for 500g/L formulation
  2. 1:300 in water for 625g/L formulation

Amount of product/10L water

  1. 40mL for 500g/L formulation
  2. 32mL for 625g/L formulation

Rate of product/ha

  1. 3.8L for for 500g/L formulation
  2. 3.0L for for 625g/L formulation

Time of application

Winter-spring rosette stage

Remarks

  • Re-treatment is usually necessary
  • Other formulations of amine also available and rates should be adjusted if using them

More information and other control methods

  • Grub individual plants
  • Pasture improvement reduces seedling emergence

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

Active ingredient

  1. 300mL/L clopyralid
  2. 750g/kg clopyralid

Rate of product use

  1. 160–320mL of 300g/L formulation
  2. 80–120g for the 750g/kg formulation

Wetting agent dilution

The addition of BS-1000 at 0.1%, i.e. 1mL/L

Time of application

  • Lower rates for rosettes
  • Higher rate apply at run-up stage.

Further information

The addition of Spray.Seed or paraquat at the rate of 2L/ha will restrict the formation of viable seed when applied at the flowering stage.

Herbicide: Picloram + 2,4-D amine (Group I)

Active ingredient

75g/L picloram + 300g/L 2,4-D amine

Amount of product/10L water

35mL

Rate of product/ha

3.5L

Time of application

Rosette to 'cabbage' stage

Remarks

This product will suppress the growth of clovers

Contact information

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