Pest plants (Weeds)

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 Landscape South Australia Act 2019 (the Act) sets out the legal framework for:

More information about South Australian weeds can be found at PIRSA - (PIRSA biosecurity weeds in South Australia) and at Declared plants of South Australia.

What is being done to manage pest plants?

The Northern and Yorke Landscape Board 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

Northern and Yorke Landscape Board 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.

Our staff also ensure that declared plants are controlled as per the Northern and Yorke Landscape Board's responsibilities under the Act.

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

Each district in the Northern and Yorke region has a Weed Action Plan, which identifies the priority weeds and how we will manage them over a five-year period.

African boxthorn

Common name: African boxthorn
Scientific name: Lycium ferocissimum
Status: Declared: must be controlled, banned from sale.
Related links:


African feathergrass

Common name: African feathergrass
Scientific name: Cenchrus macrourus
Status: Declared
Related links:


African lovegrass

Common name: African lovegrass
Scientific name: Eragrostis curvula
Status: Declared: must be controlled, banned from sale
Related links:


African rue

Common name: African rue
Scientific name: Peganum harmala
Status: Declared
Related links:


Aleppo pine

Common name: Aleppo pine
Scientific name: Pinus halepensis
Status: Pest plant
Related links:


Alligator weed

Common name: Alligator weed
Scientific name: Alternanthera philoxeroides
Status: State Alert. Notify Landscape Board immediately if found. Declared: must be destroyed, banned from sale.
Related links:


Arum lily

Common name: Arum lily
Scientific name: Zantedeschia aethiopica
Status: Declared: must be controlled (doesn't apply to ones planted >100m from wetland/watercourse). Plant mustn't be sold.
Related links:


Asparagus fern

Common name: Asparagus fern
Scientific name: Asparagus scandens
Status: Must be controlled, banned from sale.
Related links:


Bathurst burr

Common name: Bathurst burr
Scientific name: Xanthium spinosum
Status: Declared
Related links:


Blackberry

Common name: Blackberry
Scientific name: Rubus fruticosus sp. agg
Status: Weed of national significance
Related links:


Bladder campion

Common name: Bladder campion
Scientific name: Silene vulgaris
Status: Declared
Related links:


Bluebell creeper

Common name: Bluebell creeper
Scientific name: Billardiera heterophylla
Status: Declared: must be controlled, banned from sale.
Related links:


Boneseed
Bridal creeper

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


Bridal veil
Broom

Common name: Broom
Scientific name: Genista monspessulana
Status: Declared: must be controlled, banned from sale.
Related links:


Broomrape

Common name: Broomrape
Scientific name: Orobanche spp
Status: State Alert. Notify Landscape Board immediately if found. Declared: must be destroyed, banned from sale.
Related links:


Buffel grass
Bulbil watsonia

Common name: Bulbil watsonia
Scientific name: Watsonia meriana var. bulbillifera
Status: Declared: must be controlled, banned from sale.
Related links:


Calomba daisy

Common name: Calomba daisy
Scientific name: Oncosiphon suffruticosum
Status: Declared
Related links:


Caltrop

Common name: Caltrop
Scientific name: Tribulus terrestris
Status: Declared: must be controlled, banned from sale
Related links:


Cape tulip

Common name: Cape tulip
Scientific name: Moraea flaccida and miniata
Status: Declared
Related links:


Chilean needlegrass

Common name: Chilean needlegrass
Scientific name: Nassella neesiana
Status: Declared: notify Landscape Board immediately if found. Must be destroyed, banned from sale.
Related links:


Chincherinchee

Common name: Chincherinchee
Scientific name: Ornithogalum thyrsoides
Status: Alert weed
Related links:


Coolatai grass

Common name: Coolatai grass
Scientific name: Hyparrhenia hirta
Status: Must be controlled, banned from sale.
Related links:


Creeping knapweed

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


Cutleaf mignonette

Common name: Cutleaf mignonette
Scientific name: Reseda lutea
Status: Declared
Related links:


Dune onion weed

Common name: Dune onion weed
Scientific name: Trachyandra divaricata
Status: Priority emerging weed
Related links:


English broom

Common name: English broom
Scientific name: Cytisus scoparius
Status: Declared: must be controlled, banned from sale
Related links:


Fountain grass

Common name: Fountain grass
Scientific name: Cenchrus setaceus
Status:
Related links:


Gazania

Common name: Gazania
Scientific name: Gazania sp.
Status: Invasive coastal weed
Related links:


Golden wreath wattle

Common name: Golden wreath wattle
Scientific name: Acacia saligna
Status: Declared.
Related links:


Gorse

Common name: Gorse
Scientific name: Ulex europaeus
Status: Weed of national significance
Related links:


Hawthorn

Common name: Hawthorn
Scientific name: Azzarola Crataegus sinaica and May Crataegus
Status: Declared: must be controlled, banned from sale
Related links:


Hoary cress

Common name: Hoary cress
Scientific name: Cardaria draba
Status: Declared
Related links:


Horehound

Common name: Horehound
Scientific name: Marrubium vulgare
Status: Declared
Related links:


Horsetail

Common name: Horsetail
Scientific name: Equisetum spp.
Status: State Alert. Notify Landscape Board immediately if found. Declared: must be destroyed, banned from sale
Related links:


Hudson pear (white-spined)

Common name: Hudson pear (white-spined)
Scientific name: Cylindropuntia pallida (syn. C. rosea)
Status: Declared: must be controlled, banned from sale.
Related links:


Innocent weed

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


Italian buckthorn

Common name: Italian buckthorn
Scientific name: Rhamnus alaternus
Status: Pest plant
Related links:


Khaki weed

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


Lincoln weed

Common name: Lincoln weed
Scientific name: Diplotaxis tenuifolia
Status: Declared
Related links:


Mexican feathergrass

Common name: Mexican feathergrass
Scientific name: Nassella tenuissima
Status: Declared.
Related links:


Olive
Pampas grasses

Common name: Pampas grasses
Scientific name: Cortaderia spp.
Status: Declared: notify Landscape Board immediately if found. Must be controlled, banned from sale.
Related links:


Polygala

Common name: Polygala
Scientific name: Polygala myrtifolia var. myrtifolia
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:


Sagittaria

Common name: Sagittaria
Scientific name: Sagittaria platyphylla
Status: Regional Alert. Notify Landscape Board immediately if found. Declared: must be destroyed, banned from sale.
Related links:


Salvation jane

Common name: Salvation jane
Scientific name: Echium plantagineum
Status: Declared: must be controlled, banned from sale.
Related links:


Salvinia

Common name: Salvinia
Scientific name: Salvinia molesta
Status: State Alert. Notify Landscape Board immediately if found. Declared: must be destroyed, banned from sale.
Related links:


Serrated tussock

Common name: Serrated tussock
Scientific name: Nassella trichotoma
Status: Declared: notify Landscape Board immediately if found, must be destroyed, banned from sale.
Related links:


Silverleaf nightshade
Skeleton weed

Common name: Skeleton weed
Scientific name: Chondrilla juncea
Status: Declared
Related links:


Spanish heath

Common name: Spanish heath
Scientific name: Erica lusitanica
Status: Priority emerging weed.
Related links:


Spiny rush

Common name: Spiny rush
Scientific name: Juncus acutus
Status: Declared: must be controlled, banned from sale.
Related links:


Tall wheatgrass

Common name: Tall wheatgrass
Scientific name: Thinopyrum ponticum)
Status: Pest plant
Related links:


Texas needlegrass

Common name: Texas needlegrass
Scientific name: Nassella leucotricha
Status: Declared: notify Landscape Board immediately if found, must be destroyed, banned from sale.
Related links:


Water hyacinth

Common name: Water hyacinth
Scientific name: Eichhornia crassipes
Status: State Alert. Notify Landscape Board immediately if found. Declared: must be destroyed, banned from sale.
Related links:


White weeping broom

Common name: White weeping broom
Scientific name: Ratama raetam
Status: Declared Plant
Related links:


Wild artichoke

Common name: Wild artichoke
Scientific name: Cynara cardunculus
Status: Declared
Related links:


Wild rose, Dog rose, and Sweet briar rose

Common name: Wild rose, Dog rose, and Sweet briar rose
Scientific name: Rosa canina and R. rubiginosa
Status: Declared: must be controlled, banned from sale. Related links:
Related links:


Yellow burrweed

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

 

 

  

 

 

 


Related links