Erect, wiry, open, tussock-forming grass <1m tall. Flat, needle-like leaves <20cm long, green on upper surface, grey-green on underside. Large, open, purple- tinged flowerheads, distinctive sharp seeds. Distinguished from other grasses by height, silvery, large, drooping seedheads.
Low fertility pasture, open woodlands, coastal areas.
Seeds spread by wool, fur, clothing, machinery etc. Also spread in hay.
Forms dense stands in poor & dry pastures, reducing productivity. Sharp seeds damage stock pelts, contaminate wool. Crowds out native species in coastal areas. Visibility hazard on roadsides.
Treated areas are best revegetated with desirable species. Follow up yearly.
1. Report it immediately to the Auckland Council Biosecurity team, who will arrange for its control at their expense.
2. Grub out small infestations before flowering.
3. Spray (100ml glyphosate + 20ml penetrant/10L).
Caution: when using any herbicide or pesticide PLEASE READ THE LABEL THOROUGHLY to ensure that all instructions and safety requirements are followed.