Pest plants

Pest plants must be managed because they can have significant impacts on industries and the environment.

Declared pest plants

Pest plants that are a significant threat to agriculture, the natural environment and public health and safety are called declared plants. Land owners have a legal responsibility to manage these plants. The Natural Resources Management (NRM) Act 2004 sets out the legal framework for:

  • banning the sale of declared weeds
  • controlling the movement of declared weeds
  • destroying or controlling infestations of declared weeds
  • notifying authorities when an infestation is detected. 

More information can be found in declared plants of South Australia.

What is being done to manage pests?

Natural Resources Northern and Yorke has a clearly defined approach to managing pests. This helps improve detection and response to new and existing pests based on their invasiveness, impact, potential distribution and feasibility of containing it.

How we can help you

Natural Resources Northern and Yorke staff are available to help you plan your approach to pest plant control. Staff can provide you with technical support, information resources and in some cases incentives to help you control pest plants. Contact us to find out more.

Natural Resources Northern and Yorke staff also ensure that declared plants are controlled as per the Northern and Yorke NRM Board’s responsibilities under the NRM Act. The approach taken to this control is detailed in the Northern and Yorke NRM Plan.

Correct use of chemicals for weed control

We can provide advice on the use of chemicals to control pest plants. It is important that chemicals such as herbicides and pesticides are used correctly. Incorrect use can impact human health and the health of the environment. Many people apply up to five times more chemical than is needed to kill the plants being targeted. This is a huge waste of time and money and can be counterproductive as it can kill the foliage of the plant before reaching the roots and so allow the weed to regrow. Excess chemicals can also run off, impacting soils, native plants and animals, and stormwater and waterways.

Priority weeds in the Northern and Yorke region

Bridal creeper

Common name: Bridal creeper
Scientific name: Asparagus asparagoides
Status: Weed of national significance
Related links:

Bridal veil

Common name: Bridal veil
Scientific name: Asapragus declinatus
Status: Weed of national significance
Related links:

Creeping knapweed

Common name: Creeping knapweed
Scientific name: Rhaponticum repens
Status: Declared
Related links:

Innocent weed

Common name: Innocent weed
Scientific name: Cenchrus incertus and longispinus
Status: Declared
Related links:

Khaki weed

Common name: Khaki weed
Scientific name: Alternanthera pungens
Status: Declared
Related links:

Prickly pear and Wheel cactus

Common name: Prickly pear and Wheel cactus
Scientific name: Opuntia sp.
Status: Weed of national significance
Related links:

Silverleaf nightshade

Common name: Silverleaf nightshade
Scientific name: Solanum elaegnifolium
Status: Weed of national significance
Related links:

White weeping broom

Common name: White weeping broom
Scientific name: Ratama raetam
Status: Priority weed
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Yellow burrweed

Common name: Yellow burrweed
Scientific name: Amsinckia intermedia
Status: Priority pest plant
Related links:






Find out about other weeds in the Northern and Yorke region.


Related links