This is a perennial grass which grows up to 50 centimetres tall and has fibrous roots. Parramatta grass is similar in appearance to Giant Rat’s Tail Grass and it can be difficult to tell them apart.
Leaves are blue-green, up to 5 millimetres wide, six to 18 centimetres long, and can be erect or spreading.
Flowers are dark green, a 2 to 20 centimetre spike-like panicle and up to 2 centimetre spikelets. Seed heads are green, up to 20 centimetres long. The seeds are brown and about 1 millimetre wide.
Habitat wet swampy areas but prefers areas with compacted soil and roadsides.
Weed characteristics invades pastures and replaces productive grasses and is known to dominate wetlands.
Dispersal It spreads mainly in soil on machinery and vehicles. The seeds become sticky when damp and can adhere to animals and clothes.
Parramatta grass is a Class 2 declared plant under Queensland legislation.
How to act
Spraying with an appropriate herbicide is very effective. There are herbicides designed to only take out sporobolus grasses without harming other species. For scattered plants or isolated infestations hand chip, bag and removal of stool from paddock and burn. Grazing management methods can gain positive ongoing control.
Refer to Weed Control Methods.
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