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.
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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.
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