Submerged aquatic, similar to oxygen weed. Very narrow leaves crowded on short branches, or in whorls of 3. Leaves toothed, deep green to purplish green. Flowers small and inconspicuous.
Still or flowing freshwater: lakes, ponds, dams, ditches, streams.
Seeds dispersed by water; also spreads from stem fragments.
Dense beds block waterways, impeding drainage, disrupting recreational activities, choking hydro turbines. Out-competes native species.
Report all sightings.
1. Rake or seine from pond; will re-establish from any remaining fragments & roots.
2. Spray (18L diquat/hectare).
Caution: when using any herbicide or pesticide PLEASE READ THE LABEL THOROUGHLY to ensure that all instructions and safety requirements are followed.