How to Control:
- Introduce Entyloma fungus & gall-fly wherever possible. The fungus may take several years to become dominant.
- Dig out or hand pull small infestations. All roots need to be removed as even small pieces of root regrow. Roots can be hung up off ground to die
- Weed wipe, all year round (300ml glyphosate/1L water) or (2g metsulfuron/1L water).
- Spray (lightly, not to run off) Aug-Jan when in flower but before seeds present (200ml glyphosate+20ml penetrant/10L water) or (3g metsulfuron+10ml penetrant/10L water). Avoid water contamination.
- Spray aquatic sites (200ml glyphosate/10L water). Use glyphosate formulation approved for use over water.
Pulled plants resprout if roots (occasionally even stems) touch damp soil and seed bank reinfests bared ground. There is a biological control, the Entyloma fungus, available – check with your regional council to see if the biological control agents are suitable for your site.
Caution: when using any herbicide or pesticide PLEASE READ THE LABEL THOROUGHLY to ensure that all instructions and safety requirements are followed.