Bottom-rooted herb. Large round, long stalked leaves on surface. Has erect rhizomes, star-shaped yellow flowers, clustered tubers.
Still freshwater: ponds, still parts of streams.
Rhizomes, tubers and by seed. Deliberate plantings.
Spreads over large area, displacing & shading out native vegetation.
Always begin treatment at top of catchment & work downstream. Follow up required.
1. Mechanical removal.
2. Spray emergent foliage (300ml glyphosate/10L, glyphosate formulation approved for use over water). Repeat as necessary.
Caution: when using any herbicide or pesticide PLEASE READ THE LABEL THOROUGHLY to ensure that all instructions and safety requirements are followed.