Nodding thistle control

Page last updated: Thursday, 10 October 2019 - 12:45pm

Please note: This content may be out of date and is currently under review.

Control methods for nodding thistle (Carduus nutans) a declared pest in Western Australia.

Report the presence of this pest before undertaking control

Information about this pest can be found on the nodding thistle: 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.

Control options

Chemical control options can be found below. For other methods of control please refer to the declared plant control handbook.

Chemical control options

Recommended herbicides

Clopyralid; Clopyralid + MCPA

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

Active ingredient

750g/kg clopyralid

Rate of product/ha

20g + MCPA amine (500) @ 1L or 0.7L MCPA low volatile ester (LVE) for application in cereal crops

Time of application

Rosettes up to a maximum of 10cm diameter — cereal crop four leaves to first node

Wetting agent

Uptake spraying oil or BS-1000 at recommended rates

More information

For application to pasture apply 40g/ha and apply to rosettes up to a maximum of 20cm diameter

Other control measures

Spot treatment using 100g/100L of water

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

Active ingredient

300g/kg Clopyralid + 500g/L MCPA amine or ester

Rate of product/ha

50mL + MCPA amine (500) @ 1L or 0.7L MCPA LVE for application in cereal crops

Time of application

Rosettes up to a maximum of 10cm diameter — cereal crop four leaves to first node

Wetting agent

Uptake spraying oil or BS-1000 at recommended rates

More information

For application to pasture apply in a water volume of 100L/ha and apply to rosettes up to a maximum of 20cm diameter

Other control measures

Spot treatment using 250mL/100L of water

Contact information

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