Salvinia (kariba weed)
|Botanical Name||Salvinia molesta|
DescriptionThe common name for this plant is kariba weed though most people call it salvinia. Kariba weed is a small floating aquatic fern forming dense mats. Elliptic (rounded at both ends, widest in middle), often overlapping leaves, 25 x 20 mm, light or brown-green and folded with upper surface densely covered in hairs. Notifiable Pest Plant.
Where is it found?Floating on ponds, drains and small lakes and still waters in swamps. Has been frequent in Auckland e.g. Western Springs now eradicated. Should be watched for.
Why is it a problem?Forms extensive dense mats seriously degrading the natural character of a waterbody and shading species underneath.
How does it spread?Fragments break off and can be transported accidentally to other waterbodies. Has been dispersed in the past by disposal of garden pond material and is now a Notifiable Pest Plant.
How do I get rid of it?
Dispose of away from waterbodies.
Paraquat (Gramoxone) or Diquat (Reglone) - see label rates. Water right required.
Salvinia is a Notifiable Pest Plant and landowners and occupiers have a legal obligation to report the presence of this plant to AgriQuaility and/or your local Pest Plant Officer who will arrange for the necessary eradication work. It is an offence for anyone to grow this plant. Notifiable Pest Plants are deemed to pose an intolerable threat to NZ and must be eradicated. The Government pays for and organises all eradication work needed on this plant.
This plant is prohibited from propagation, sale and distribution within New Zealand!