Form: aquatic — perennial
Status: not present in WA
A submerged rhizomatous perennial plant native to South Africa. Grows readily from shoot fragments.
Stems: Branched up to five metres long.
Leaves: Alternate, bending back, crisp to two centimetres long. Leaves grow in a spiral arrangement and not in groups or whorls.
Agricultural and economic impact
An environmental weed. This aquatic weed forms dense mats of vegetation several metres thick at or just below the water surface, blocking light penetration, out-competing and displacing native water plants and affecting associated populations of aquatic invertebrates. Severe infestations can affect the use of waterbodies for recreational activities such as swimming, boating and fishing.
Declared pest category
The Western Australian Organism List (WAOL) contains information on the area(s) in which this pest is declared and the control and keeping categories to which it has been assigned in Western Australia (WA). Search for lagarosiphon in the WAOL. using the scientific name Lagarosiphon spp.
Requirements for land owners/occupiers and other persons
Requirements for land owners/occupiers and other persons if this pest is found can be sourced through the declared plant requirements link.
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Pest and Disease Information Service (PaDIS)
Control methods for this declared plant can be found through the lagarosiphon control link.