Sicklepod (Senna obtusifolia) control

Page last updated: Monday, 17 September 2018 - 10:56am

Please note: This content may be out of date and is currently under review.

Control methods for sicklepod (Senna obtusifolia) a declared pest in Western Australia.

Information about this pest can be found on the sicklepod (Senna obtusifolia): 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

  • Picloram + 2,4-D

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

Active ingredient

Picloram 75g/L + 2,4-D 300g/L 

Rate of product/ha

  • 0.7L for plants less than 50cm
  • 1.0L for plants 5–100cm
  • 1.5L for plants >100cm

Wetting agent

Non-ionic such as BS-1000 @ 100mL/100L water or Uptake spraying oil at 0.5L/100L water

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

Active ingredient

Picloram 100g/L + triclopyr 300g/L 

Rate of product/10L water


Wetting agent

Non-ionic such as BS-1000 @ 100mL/100L water

Time of application Up until flowering


  • Also picloram 100g/L + triclopyr 300g/L+ 8g/L aminopyralid (Grazon™ Extra) used on S. tora
  • Apply as a high volume spray
  • Other products containing just picloram + 2,4-D amine also registered at 20mL/10L


Contact information

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