Weed control
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Cut-stump frill and drill holes treated with herbicide
Where weedy exotic plants occur, walking tracks provide ideal access for a systematic control program. Check identity of target species.
persistent vines such as Blackberry and Periwinkle can be slashed and sprayed.
woody weeds can be treated with systemic herbicide placed in 'bark frills' around the trunk or in holes drilled into the base.
hand-pulling may be an option for some shrubs.
it is important for monitoring and follow-up treatment to be undertaken; regrowth will quickly negate earlier efforts.
pedestrian traffic can suppress many herbaceous weeds, but mowing may be necessary in some seasons.
use of herbicides must be discussed with the managing agency
  ... remove the weeds to give the native plants a chance ...