Primrose willow
Ludwigia peruviana
See it - Report it
Early detection is vital to stop Primrose willow becoming established in South Australia.
If you see this weed, please report it to the National Pest Alert Hotline (Freecall) 1800 084 881.
Weed profile
Perennial
Shrub
Reportable
Hinders movement- Habitat: waterways, wetlands
Impact
Invades and obstructs streams.
Description
- Aquatic shrub emerging from water to 2 m tall.
- Leaves narrow with stalkless base and prominent veins.
- Flowers yellow with 4 petals.
Control options
picloram (44.7g/L) + aminopyralid (4.7 g/L)
Application Method: Cut stump
Application Rate: Undiluted gel
Product Name: Vigilant II®
Herbicide Group: 4
Situation: Aquatic and wetland habitats
Timing: Cut stump, early flowering but before autumn change of colour.
Comments: Cut stem and apply a 3-5 mm thick layer immediately. Ensure all parts of the plant are removed from the site and destroy by burning or deep burial.
Legal Status: Registered for this use on woody weeds in general.
glyphosate (360g/L)
Application Method: Spot spray
Application Rate: 1L/100L
Product Name: Roundup Biactive®
Herbicide Group: 9
Situation: Aquatic and wetland habitats.
Timing: Spot spray, early flowering but before autumn change of colour.
Comments: Ensure thorough coverage is achieved. Suitable for use near waterways - refer to label. Non selective, avoid contact with desirable plants.
Legal Status: Registered (as general woody weeds)
Manual removal
Situation: Aquatic and wetland habitats.
Timing: When found.
Comments:
Grub individual plants. Ensure all parts of the plant are removed from the site and destroy by burning or deep burial.
Monitor site and undertake follow up control until eradication has been achieved.
Legal requirements in each region
Land owners in this region to eliminate the plant from their property. Enforceable by the Alinytjara Wiluṟara Landscape Board.
Must not be sold or traded in any way, including as a contaminant of anything.
Must not be transported on a public road, including as a contaminant of anything.
Must not be imported into the region.
land owners in this region must notify the Alinytjara Wiluṟara Landscape Board of any infestation of the plant found on their land.
Land owners in this region to eliminate the plant from their property. Enforceable by the Eyre Peninsula Landscape Board.
Must not be sold or traded in any way, including as a contaminant of anything.
Must not be transported on a public road, including as a contaminant of anything.
Must not be imported into the region.
land owners in this region must notify the Eyre Peninsula Landscape Board of any infestation of the plant found on their land.
Land owners in this region to eliminate the plant from their property. Enforceable by the Green Adelaide Board.
Must not be sold or traded in any way, including as a contaminant of anything.
Must not be transported on a public road, including as a contaminant of anything.
Must not be imported into the region.
land owners in this region must notify the Green Adelaide Board of any infestation of the plant found on their land.
Land owners in this region to eliminate the plant from their property. Enforceable by the Hills and Fleurieu Landscape Board.
Must not be sold or traded in any way, including as a contaminant of anything.
Must not be transported on a public road, including as a contaminant of anything.
Must not be imported into the region.
land owners in this region must notify the Hills and Fleurieu Landscape Board of any infestation of the plant found on their land.
Land owners in this region to eliminate the plant from their property. Enforceable by the Kangaroo Island Landscape Board.
Must not be sold or traded in any way, including as a contaminant of anything.
Must not be transported on a public road, including as a contaminant of anything.
Must not be imported into the region.
land owners in this region must notify the Kangaroo Island Landscape Board of any infestation of the plant found on their land.
Land owners in this region to eliminate the plant from their property. Enforceable by the Limestone Coast Landscape Board.
Must not be sold or traded in any way, including as a contaminant of anything.
Must not be transported on a public road, including as a contaminant of anything.
Must not be imported into the region.
land owners in this region must notify the Limestone Coast Landscape Board of any infestation of the plant found on their land.
Land owners in this region to eliminate the plant from their property. Enforceable by the Murraylands and Riverland Landscape Board.
Must not be sold or traded in any way, including as a contaminant of anything.
Must not be transported on a public road, including as a contaminant of anything.
Must not be imported into the region.
land owners in this region must notify the Murraylands and Riverland Landscape Board of any infestation of the plant found on their land.
Land owners in this region to eliminate the plant from their property. Enforceable by the Northern and Yorke Landscape Board.
Must not be sold or traded in any way, including as a contaminant of anything.
Must not be transported on a public road, including as a contaminant of anything.
land owners in this region must notify the Northern and Yorke Landscape Board of any infestation of the plant found on their land.
Land owners in this region to eliminate the plant from their property. Enforceable by the South Australian Arid Lands Landscape Board.
Must not be sold or traded in any way, including as a contaminant of anything.
Must not be transported on a public road, including as a contaminant of anything.
land owners in this region must notify the South Australian Arid Lands Landscape Board of any infestation of the plant found on their land.
More Information
Find out how to:
- benefit from the early intervention of new and emerging weeds - handbook
- best manage your use and storage of agricultural and veterinary chemicals.
Control advice
For further help and advice managing this weed contact your regional landscape board: