Status of salvinia in Tasmania(Salvinia molesta)
- 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?
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.
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 (Image: Barry Rice)
Image above left: Salvinia in waterway (Image: CDFA)
Image above right: Salvinia - leaves and spore sacs (Image: 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 your Regional Weed Management
Officer on 1300 368 550 to report this weed.
Salvinia Weed Management Plan
Weed Links and Resources
Other useful links
Weeds in Australia - Weed Management Guide
extent permitted by law, the Tasmanian Department of Primary Industries,
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