Declared plants

To protect Western Australian agriculture the Department of Primary Industries and Regional Development regulates harmful plants under the Biosecurity and Agriculture Management Act 2007.

Plants that are prevented entry into the State or have control or keeping requirements within the State are known as declared pests.

The Western Australian Organism List (WAOL) contains information on the area(s) in which a plant is declared and the control and keeping categories to which it has been assigned in WA.

If you need advice on declared plants please search for articles below in our website or:

Articles

  • Control methods for hoary cress (Lepidium draba) - a declared pest in Western Australia.

  • Control methods for Sagittaria (Sagittaria platyphylla) a declared pest in Western Australia.

  • Control methods for Mimosa (Mimosa pigra) a declared pest in Western Australia. Report the presence of this organism before undertaking a control measure.

  • Control methods for serrated tussock (Nassella trichotoma) a declared pest in Western Australia. Report the presence of this organism before undertaking a control measure.

  • Wheel cactus (Opuntia robusta) is a declared pest in Western Australia (WA).

  • Bathurst burr (Xanthium spinosum) is a declared pest in Western Australia (WA).

  • Mexican poppy is the common name given to two weeds: Argemone mexicana and Argemone ochroleuca. Both species are poisonous.

  • Water hyacinth, floating water hyacinth, (Eichhornia crassipes) is a declared pest in Western Australia (WA).

  • Arrowhead (Sagittaria montevidensis) is a declared pest in Western Australia (WA).

  • Opuntia species (except O.