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Invasive Species
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Salvinia
Salvinia
Page Content
(Salvinia molesta)
Status of salvinia in Tasmania
Salvinia is a
declared weed
in Tasmania under the Tasmanian
Weed Management Act 1999
. The importation, sale and distribution of salvinia are prohibited in Tasmania.
The legal responsibilities of landholders and other stakeholders in dealing with salvinia are laid out in the
Salvinia Weed Management Plan
.
What does salvinia look like?
Salvinia is a free-floating aquatic herb. The leaf size varies depending the density of plants, ranging from 0.5 to 3 cm long. The leaves are covered in small water-repelling hairs that also provide buoyancy. The leaf margins are darker coloured. The roots are fine divided modified leaves. The spore sacs which develop among the roots resemble bunches of grapes. Dense mats of salvinia can completely cover the water surface.
Fertile spores have never been found and all spread is by vegetative means. The early juvenile form of the plant is the invasive form. Spread occurs when plant fragments are moved in flood waters. Salvinia is also spread via the ornamental plant trade.
Image top: Salvinia, © Barry Rice.
Image above L-R: Salvinia in waterway; Salvinia
leaves and spore sacs,
© CDFA.
Impacts of salvinia
Salvinia is a serious weed of irrigation channels, natural waterways and wetlands.
Where does salvinia occur
Salvinia is a native of South America. Salvinia has naturalised in New South Wales, Queensland, the Northern Territory and Western Australia.
Salvinia has not naturalised in Tasmania.
What you need to do
If you locate salvinia anywhere in Tasmania, or if you find a plant that you think could be salvinia, immediately contact Biosecurity Tasmania on 03 6165 3777 to report this weed.
See also
Salvinia Weed Management Plan
Weed Links and Resources
Other useful links
Pest Genie
APVMA
Weeds in Australia - Weed Management Guide
Important Disclaimer
To the extent permitted by law, the Tasmanian Department of Primary Industries, Parks, Water and Environment (including its employees and consultants) excludes all liability to any person for any consequences, including but not limited to all losses, damages, costs, expenses and any other compensation, arising directly or indirectly from using information or material (in part or in whole) contained on this website.