Spread of Sweet briar
- Sweet briar spreads mainly by the dispersal of
seed. Birds eat the hips, and seeds germinate from the droppings. Seeds
can also spread via water along creeks and waterways.
- Sweet briar may also regenerate from root and crown fragments left after mechanical disturbance of an infestation.
- Dozer blades or chains
are effective methods for removing sweet briar. Remove as much as
possible of the root system to avoid re-growth from root pieces
remaining in the soil.
- Deep ploughing will remove
sweet briar, while establishing a well managed, vigorous pasture helps
prevent the re-establishment of the weed. Repeated cultivation will
control seedlings and small re-growth.
- Sweet briar will not usually establish in well
managed and grazed pasture. The seedlings are delicate and heavy grazing
with sheep will usually control the weed.
- Goats will eat practically the whole of the bush and if present in sufficient numbers can eliminate entire infestations.
- A number of herbicides are registered for use on sweet briar in Tasmania. See
Herbicides for Sweet Briar Control for more information.
- Regardless of which herbicide is used, treated bushes should be left undisturbed for at least six months after herbicide application.
- Treated bushes should be checked for regrowth in the two years following application, as regrowth may not appear for up to two years after treatment.
- Regrowth should be treated with herbicide only after regrowth is at least 300 mm high.
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