Bathurst Burr

What is Bathurst burr?

(Xanthium spinosum)

Bathurst burr - flowering

How to identify Bathurst burr

  • Bathurst burr is a branching, perennial (long-lived) plant growing to a height of about 80 cm.
  • The stems and lower surface of the leaves are covered with white woolly hairs, giving the plant a silvery appearance. The leaves have a "crinkly" appearance and the leaf margins have rounded teeth. The white flower clusters are densely packed, forming balls of flowers that surround the upper stems at each leaf node.
  • Most seed germinates after autumn rains but some germination also occurs through winter into spring. Established plants flower over several months during summer and autumn and new growth is produced each year in autumn and spring.
  • For help in identifying Bathurst burr, search the Dennis Morris Weeds and Endemic Flora Database for Bathurst burr illustrations. If you are still in doubt about the weed you are dealing with, contact your Regional Weed Management Officer on 1300 368 550 for help. Bathurst burr plant

Image top right: Bathurst burr - fruiting branch (Image: Robin Knox)
Image above: Bathurst burr - whole plant (Image: Karen Stewart)


Burr species in Tasmania

  • Burr species (Xanthium spp.) have the capacity to grow throughout much of Tasmania. Burrs are most troublesome in grazing areas. Infestations occur on roadsides, waste areas, stockyards, dry banks, near farm buildings and on the site of old homesteads.
  • Bathurst burr, one of the more serious burr species, is not widely recorded and is a target for eradication.
  • Bathurst burr can contaminate sheep and goat fleeces by its dry fruits (or burrs), leading to significant losses in fleece value due to matting.
  • Bathurst burr is also an important environmental weed due to its ability to invade disturbed native vegetation.

What is the legal status of Bathurst burr in your area?

The legal responsibilities of landholders and other stakeholders in dealing with Bathurst burr are laid out in the burrs Statutory Weed Management Plan.

Use Table 1 (Zone A municipalities) in the Statutory Weed Management Plan to find out whether this weed occurs in your municipality.

Detailed management and control guidelines for Bathurst burr can be found in the Bathurst Burr Control Guide. Refer also to Herbicides for Bathurst Burr Control. For further information see DPIPWE's Weed Links and Resources.


See also
Bathurst Burr Control Guide
Burrs Statutory Weed Management Plan
Bathurst Burr - Herbicides for Control
Weed Links and Resources

Other useful links
Pest Genie
APVMA


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