State prohibited weeds

Alligator weed

Alligator weed invades both land and water. Infestation mats can cover an extensive area, causing major blockages of waterways.

Branched broomrape

Branched broomrape is a parasitic weed that extracts nutrients from a range of common broadleaf crop and pasture plants.

Camel thorn

Camel thorn can break through sealed bitumen roads and its sharp-tipped spines pose a danger to stock.

Hawkweed

Hawkweeds are perennial herbs that are native to Europe, but are aggressive weeds in other parts of the world.

Horsetails

Horsetails are among the world's worst agricultural weeds.All species are thought to contain chemicals that are toxic to livestock.

Karoo and giraffe thorn

Karoo thorn and giraffe thorn are trees with the potential to invade southern Australia. The spines injure grazing animals and make impenetrable thickets.

Knotweed

Knotweed is listed by the World Conservation Union as one of the world's worst invasive species.

Lagarosiphon

Lagarosiphon is an aggressive freshwater aquatic plant that chokes still and slow-moving water. Once established it is difficult and costly to eradicate.

Mesquite

In Victoria small, isolated infestations of mesquite have been recorded in northern and north-western rural areas of the state.

Mexican feather grass

Mexican feather grass is hardy, drought-tolerant, unpalatable to stock and difficult to control.

Parthenium weed

Parthenium weed can germinate, grow and set seed within 4 weeks, resulting in multiple germinations in one year.

Perennial ragweed

Perennial ragweed is not found in Victoria, but there are established populations in NSW that remain a threat.

Poverty weed

Poverty weed a strong competitor to other plants, and large food reserves in its roots allow it to survive through drought conditions.

Salvinia

Salvinia grows rapidly and can block waterways.

State prohibited weeds in Victoria

By reporting state prohibited weeds to us, you can help us detect and eradicate any infestations before they become widespread.

Tangled hypericum

Tangled hypericum is a very competitive plant with the ability to eliminate most other vegetation.

Water hyacinth

Water hyacinth is one of the world's worst aquatic weeds.

Weed Spotters

Information and news about our Weed Spotters program.

Was this page helpful?

Page last updated: 02 Mar 2021