Status of false yellowhead in Tasmania(Dittrichia viscosa)
- False yellowhead is a declared weed in Tasmania under the Tasmanian Weed Management Act 1999. The importation, sale and distribution of false yellowhead are prohibited in Tasmania.
- The legal responsibilities of landholders and other stakeholders in dealing with false yellowhead are laid out in Statutory Management Plan for False Yellowhead.
What does false yellowhead look like?
yellowhead is an erect, bushy perennial (long-lived) shrub growing to
1.5 metres high. Young stems are covered in sticky hairs that give out a
foul smell when crushed. The leaves are grey-green and serrated at the
edges. The flowers are yellow and daisy-like and occur in clusters of
4-12 flowers. The root system is large and robust, making the plant
difficult to pull out.
- Germination occurs mostly in autumn after
rain, but can occur at any time when moisture is available. Flowering
occurs from mid-summer to mid-autumn.
- False yellowhead spreads
by seed. The seed has a bristly pappas (like a small parachute) which
catches the wind or allows the seed to float in running water. Seed is
also spread in contaminated soil and on machinery.
All false yellowhead images: Luigi Rignanese
Impacts of false yellowhead
yellowhead is a potentially serious environmental weed. In south-west
Western Australia, the weed grows on road verges, firebreaks, walking
tracks and around wetlands. False yellowhead often establishes after
mechanical disturbance or fire, but may also be able to spread into
Where does false yellowhead occur?
- False yellowhead is native to southern Europe, Turkey, the Middle East and North Africa.
- False yellowhead has naturalised in Britain, and in Australia the weed has established in south-west Western Australia.
- False yellowhead has naturalised in Tasmania.
What you need to do
See also Statutory Management Plan for False Yellowhead Weed Links and ResourcesOther useful linksPest GenieAPVMAWeeds in Australia - Weed Management Guide
- If you locate false
yellowhead anywhere in Tasmania, or if you find a plant that you think
could be false yellowhead, immediately contact your Regional Weed
Management Officer on 1300 368 550 to report this weed.
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permitted by law, the Tasmanian Department of Primary Industries, Parks,
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