|Image top: Flowers and leaves of Alligator weed, © NSW DPI|
Image above right: Waterway infested with Alligator weed, © Far North Coast County Council, NSW
Image above left: Close up of Alligator weed flower, © NSW DPI
Impacts of alligator weed
- The thick mats formed by alligator weed give it the ability to cause major environmental damage in natural aquatic and semi-aquatic habitats. The plant can exclude light, impede gas exchange and compete with native flora and fauna. In addition, alligator weed infestations in irrigation channels and wetter pastures are a significant threat to agriculture, aquaculture and horticulture. The plant also affects and seriously limits recreational and boating activities, increases silting and contributes to flooding.
Where does alligator weed occur?
- Alligator weed is a native of South America. Alligator weed has naturalised widely on mainland Australia.
Alligator weed has not naturalised in Tasmania. However, the weed has been recorded in domestic gardens in both the north and south of the state.
What you need to do
- If you locate alligator weed anywhere in Tasmania, or if you find a plant that you think could be alligator weed, immediately contact Biosecurity Tasmania on 03 6165 3777 to report this weed.