Name: Lagarosiphon Progressive Containment Area

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Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>Lagarosiphon is a rhizomatous perennial freshwater herb. The plant has spiralled leaves on a much-branched stem. The stems can be up to five metres long and form large interwoven mats below the water surface in depths to six and a half metres. It was introduced from southern Africa as an aquarium plant and grows wholly submerged in fresh water ponds, lakes and slow moving streams, with silty or sandy bottom mud.</SPAN></P><P><SPAN>Lagarosiphon forms vast, deep meadows in still and slow moving water that shade out other species. Large clumps can dislodge, causing blockages in streams and outfalls that lead to flooding. It can restrict recreational activities such as boating and fishing on affected water bodies. Lagarosiphon is known in a small number of small waterways in the lower plains. Initial infestations are thought to have resulted from releasing pet fish into waterways including ‘oxygen weed’. A localised infestation in ponds and oxbows in the Ōreti River eel fishing may be related to eel fishing activities there.</SPAN></P><P><SPAN>For these reasons lagarosiphon is included in the Southland Regional Pest Management Plan.</SPAN></P></DIV></DIV></DIV>

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