Click on images to enlarge
infestation (Photo: Sheldon Navie)
habit (Photo: Sheldon Navie)
habit (Photo: Sheldon Navie)
close-up of stem, ligule and base of leaf blade (Photo: Sheldon Navie)
seed-heads (Photo: Sheldon Navie)
close-up of young flower spikelets (Photo: Sheldon Navie)
mature seed-head (Photo: Sheldon Navie)
close-up of mature spikelets and seeds (Photo: Sheldon Navie)
close-up of mature spikelet and 'seeds' with bent and twisted awns (Photo: Julia Scher)
close-up of 'seeds', with whitish hairs covering their lower half and two small bristles at their tips (Photo: Julia Scher)
Avena barbata Pott ex Link
Avena alba Vahl. (misapplied)Avena fatua L. var. barbata (Pott ex Link) Fiori & PaolettiAvena sterilis L. subsp. barbata (Pott ex Link) Gillet ex Magne
Gramineae (South Australia)Poaceae (Queensland, New South Wales, the ACT, Victoria, Tasmania, Western Australia and the Northern Territory)
barbed oat, bearded oat, bearded oats, slender oat, slender wild oat
Native to northern Africa, the Azores, the Madeira Islands, the Canary Islands, Europe, the Arabian Peninsula, western Asia and the Indian Sub-continent.
Widely naturalised in southern Australia (i.e. throughout New South Wales, Victoria, the ACT and Tasmania, in many parts of South Australia and in southern and western Western Australia). Also naturalised on Lord Howe Island and in many other parts of the world.
Bearded oat (Avena barbata) is a common weed of roadsides, disturbed sites, waste areas, gardens and pastures and is only rarely found in crops. It is also a weed of disturbed and undisturbed natural vegetation (e.g. open woodlands, shrublands, grasslands, riparian areas and wetlands) and is regarded as an environmental weed in Victoria and Western Australia. For example, this species is considered to be a serious threat to native vegetation communities in the Goulburn Broken Catchment in northern Victoria (e.g. invasion of this species is seen as a threat to grey box and buloke grassy woodlands) and it is a common weed of wetlands in the southern parts of Western Australia.
Bearded oat (Avena barbata) is also a weed of conservation areas in South Australia (e.g. Marino Conservation Park in Adelaide) and encroaches into sites populated by the critically endangered Whibley wattle (Acacia whibleyana). This species is endemic to the near-coastal region around Tumby Bay on the Eyre Peninsula in South Australia, and dense populations of weeds, including bearded oat (Avena barbata), have been found to significantly reduce seedling emergence and growth of this rare native plant.
Fact sheets are available from Department of Employment, Economic Development and Innovation (DEEDI) service centres and our Customer Service Centre (telephone 13 25 23). Check our website at www.biosecurity.qld.gov.au to ensure you have the latest version of this fact sheet. The control methods referred to in this fact sheet should be used in accordance with the restrictions (federal and state legislation, and local government laws) directly or indirectly related to each control method. These restrictions may prevent the use of one or more of the methods referred to, depending on individual circumstances. While every care is taken to ensure the accuracy of this information, DEEDI does not invite reliance upon it, nor accept responsibility for any loss or damage caused by actions based on it.
Copyright © 2016. All rights reserved. Identic Pty Ltd. Special edition of Environmental Weeds of Australia for Biosecurity Queensland.
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