Lagarosiphon, South African oxygen weed
|Botanical Name||Lagarosiphon major|
DescriptionVigorous perennial growing submerged in water. Stems to 5 m long, slender, brittle and much branched. Leaves dark green, crowded above, alternate, stiff and curved downwards, usually 6-20 mm long, gradually tapering to a sharp or fine point. Flowers solitary, tiny, pinkish. Can be confused with other oxygen weed species. Recognised by its alternate downward-curved leaves.
Where is it found?To 6.5 m depth in lakes and ponds, rivers and streams. Scattered throughout. Forms dense stands.
Why is it a problem?Forms dense stands in waterbodies excluding other vegetation.
How does it spread?A commonly cultivated species which is occasionally released to waterbodies by disposal from garden ponds and aquarims.
How do I get rid of it?
Cover weed mat to exclude light.
Diquat (Reglone) - see label rates. Within the Bay of Plenty region a consent is required from Environment Bay of Plenty before Diquat is applied to water.
This plant is prohibited from propagation, sale and distribution within New Zealand!