Dockstar is a selective herbicide used to control docks and bracken. Now registered for use in the control of Yellow Bristle grass.
Active Ingredient:
365g/litre Asulam SL
What it controls Primarily used for:
– Docks (Rumex spp.) Main Target.
– Bracken Fern.
– Yellow Bristle Grass (registered use).
It’s especially valuable in established pasture where you want to keep:
– Ryegrass.
– Clover.
– Tall Fescue.
Where it can be used:
– Established Pasture.
– Lucerne / Clover.
– Forestry (Bracken Control, Tree Release).
– Non-Cropping Areas / Roadsides.
Key use points (practical)
Apply to actively growing weeds (best results in spring), Needs good leaf coverage for uptake.
Avoid spraying:
– Before rain (within ~12 hours).
– During drought stress or frost.
– Slow acting – full control can take weeks to months.
Grazing:
No strict withholding period, but best to leave ~1–3 weeks for effectiveness.
Safety & hazards
– Classified as harmful + ecotoxic.
– Can irritate skin and eyes.
– Possible reproductive/development effects with repeated exposure.
– Toxic to aquatic life & some plants (spray drift risk).
Strengths
– Selective → won’t wipe out pasture grasses.
– Effective on hard-to-kill docks (deep taproot).
– Useful in mixed pasture systems.
Limitations
– Slow kill compared to knockdown herbicides.
– Needs good timing and growth conditions.
– Can require repeat applications on large mature docks.
Common tank mixes
Often paired with 2,4-D products (e.g. Baton 800WSG) for broader weed control.
Bottom line
Dockstar is a specialist pasture herbicide—best used when You want to remove docks without damaging the pasture and you are okay with slower, systemic control rather than instant burn-down.
Caution:
Use strictly according to label directions.
Available in 20L
Registered under the ACVM Act: P009015
