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.


For state policy advice

Biosecurity SA - Invasive Species Unit:

For regional control advice

Page Last Reviewed: 23 Dec 2014
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