Acacia control

Page last updated: Monday, 20 July 2020 - 2:16pm

Please note: This content may be out of date and is currently under review.

Control methods for non-native, declared pest Acacia species in Western Australia.

Several non-native Acacia species are declared pests in Western Australia. Information about these pests can be found on the acacia: 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:

  • Picloram + tricolopyr

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

Active ingredient

100g/L picloram + 300g/L triclopyr

Rate of product/10L water


Wetting agent

Add at recommended rate as per label


  • Apply to trees 1-3m tall and thoroughly wet foliage
  • Also the product Grazon® Extra containing 8g/L aminopyralid in addition to 100g/L picloram + 300g/L triclopyr

Herbicide: Access (Group I)

Active ingredient

120g/L picloram (iso-octyl ester) + 240g/L triclopyr (butoxyethyl ester)

Rate of product/ha

1:60 in distillate


  • Treat plants up to 5cm stem diameter
  • Treat all stems on multiple stemmed plants
  • Root suckering may occur and will require treating

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

Active ingredient

  1. 600g/L triclopyr
  2. 755g/L triclopyr

Rate of product/10L water

  1. 600g/L triclopyr
    1. 16mL/10L water for trees 1-2m tall
    2. 32mL/10L water for trees 2-3m tall
  2. 755g/L triclopyr
    1. 11mL/10L water for trees 1-2m tall
    2. 22 mL/10L water for trees 2-3m tall

Contact information

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