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Noxious Weeds Classification

Noxious weeds are weedy plant species that are controlled and or managed under state or territory legislation. The legislation prescribes a variety of management options from prohibition of sale and trade to enforced control.  The five categories of noxious weeds and the listed weeds within the categories are listed below.

Class 1 - State Prohibited Weeds

"The plant must be eradicated from the land and the land must be kept free of the plant."

These types of weeds are listed below:
Black knapweed - Centaurea nigra
Broomrape - Orobanche species
Chinese violet - Asystasai gangetica, subspecies micrantha
Eurasian milfoil - Myrophyllum spicatum
East Indian Hygrophila - Hygrophila polysperma
Hawkweed - Hieracium species
Horsetail - Equisetum species
Hymenache - Hymenache amplexicauis
Karroo thorn - Acacia karroo
Kochia - Bassia scoparia
Lagarosiphon - Lagarosiphon major
Mexican feather grass - Nassella tenuisima
Miconia - Miconia species
Mimosa - Mimosa pigra
Parthinium weed - Parthinium hysterophorus
Pond apple - Annona glabra
Prickly acacia - Acacia nilotica
Rubber vine - Cryptostegia grandiflora
Senegal tea plant - Gymnocoronis spilanthoides
Siam weed - Chromolaena odorata
Spotted knapweed - Centaurea maculosa
Water caltrop - Trapa species
Water soldier - Stratoides aloides
Whitch weed - Striga species
Yellow burrhead - Limnocharis flava

Class 2 - Regionally Prohibited Weeds

"The plant must be eradicated from the land and the land must be kept free of the plant."

Hygrophyla - Hygrophyla costata
Salvinia - Salvinia molesta
Water hyacinth - Eichhornia crassipes

Class 3 - Regionally Controlled Weeds

"The plant must be fully and continuously suppressed and destroyed."

Alligator weed - Alternanthera philoxeroides
Green cestrum - Cestrum parqui
Ludwigia - Ludwigia peruviana

Class 4 - Locally Controlled Weeds

"The growth and spread of the plant must be controlled according to the measures specified in a management plan published by the local control authority."

Bitou bush - Chysanthemoides monilifera, subspecies rotunda
Blackberry - Rubus fruiticosus, aggregate species
Boneseed - Chysanthemoides monilifera, subspecies monilifera
Castor oil - Ricinus communis
Chillean needle grass - Nassella neesiana
Harrisia cactus - Harrisia species
Lantana - Lantana species
Long-leaf willow primrose - Ludwigea longifolia
Pampas grass - Cortaderia species
Pellitory - Parietaria judaica
Prickly pear - Cylindropuntia species
Broad leaf privet - Ligustrum lucidium
Narrow leaf privet - Ligustrum sinense
Rhus tree - Toxicodendron succedanea
Serrated tussock - Nassella trichotoma
St Johns wort - Hypericum perforatum

Class 5 - Restricted Plants through out NSW

"The requirements in the Noxious Weeds Act 1993 for a notifiable weed must be complied with."

Annual ragweed - Ambrosia artemisiifolia
Arrow head - Saggittaria montevidensis
Artichoke thistle - Cynara cardunculus
Athel tree - Tamarix aphylla
African feathergrass - Pennisetum macrourum
African turnipweed - Sisymbrium runcinatum
African turnipweed - Sisymbrium thellungii
Bridle creeper - Asparagus aspagagoides
Cabomba - Cabomba caroliniana
Cayenne snake weed - Stachtarpheta cayennensis
Clock weed - Gaura lindheimeri
Clock weed - Gaura parviflora
Corn sowthistle - Sonchus brownii
Fountain grass - Pennisetum setaceum
Gallons curse - Cenchrus biflorus
Espartillo - Achnatherum brachychaetum
Glaucus star thistle - Carthmus glaucus
Golden sowthistle - Scolymus hispanicus
Mexican poppy - Argemone mexicana
Mossman river grass - Cenchrus echinatus
Onion grass - Romulea species
Oxalis - Oxalis species
Red rice - Oryza ruflipogan
Sagittaria - Sagittaria platyphlla
Sand oat - Avena strigose
Smooth stemmed turnip - Brassica barrelieri, subspecies axyrrhina
Soldier thistle - Picnonon acarra
Texas blue weed - Helianthus ciliaris
Yellow nut grass - Cyperus esculentus
Willows - Salix species