Weeds of National Significance (WoNS)

WoNS are Australia’s most invasive plants that have proven social, economic and environmental impacts that require national action to manage. There are national programs and strategies for each WoNS.

WoNS known to occur in South Australia are:

  • African boxthorn
  • Alligator weed
  • Asparagus weeds
  • Athel pine
  • Boneseed
  • Blackberry
  • Bridal creeper
  • Brooms
  • Chilean needle grass
  • Gorse
  • Mesquite
  • Opuntioid cacti
  • Parkinsonia
  • Prickly acacia
  • Silverleaf nightshade
  • Willows.

WoNS that are alert weeds in South Australia are:

  • Sagittaria
  • Salvinia
  • Serrated tussock
  • Parthenium
  • Water hyacinth.

Wheel Cactus and African Boxthorn control and demo site

A Wheel Cactus and African Boxthorn trial and demonstration site has been established in the Mid-North of South Australia to compare the effectiveness of aerial and mechanical control of African Boxthorn, and to demonstrate various ‘traditional’ chemical treatments for both species.

Read more about the Wheel Cactus and African Boxthorn trial and demonstration site.


For state policy advice

Biosecurity SA - Invasive Species Unit:

For regional control advice

  • Landscape South Australia: Landscape boards
  • National Pest Alert Hotline (Freecall): 1800 084 881
Page Last Reviewed: 23 Dec 2014
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