Annual, grass-like or herb, 0.2-1 m high. Fl. green, Oct to Dec.
Beard’s Provinces: South-West Province.
IBRA Regions: Jarrah Forest, Swan Coastal Plain, Warren.
IBRA Subregions: Northern Jarrah Forest, Perth, Warren.
IMCRA Regions: Abrolhos Islands.
Local Government Areas (LGAs): Augusta Margaret River, Greater Geraldton, Murray, York.
Alternative Names. Bearded darnel, darnel lolium, poison darnel, poison ryegrass.
General Biology. Growth form. Grass. Life form. Annual, caespitose. Reproduction. Seed. Dispersal. Water, wind, agriculture. Photosynthetic Pathway. C3. Toxicity. Seeds are susceptible to a fungal infection which can have toxic effects.
Notes. Tolerant of frost. Prefers light sand, medium loam or heavy clay soils. These may be acidic, neutral or alkaline. Intolerant of shade and requires moist soil. Has a short life cycle (2–3 months). Flowers are self-fertile and hermaphroditic (have both male and female parts). Water stress can inhibit flowering. There are both awned and awnless varieties.
Additional information. Origin. Europe, Mediterranean. History of use/introduction. Weed of wheat and barley crops. Similar exotic species. Lolium perenne.
Suggested method of management and control. Prevent seed set. Spray with Fusilade® Forte at 16 ml/10 L + wetting agent or for generic fluazifop-p (212g/L active ingredient) 10ml/10L+ wetting agent before stem elongation. Read the manufacturers' labels and material safety data sheets before using herbicides. For further information consult the Australian Pesticides and Veterinary Medicines Authority to determine the status of permits for your situation or state.
Legend: Y = Yes, regularly, O = Occasionally, U = Uncertain, referred by others but not confirmed.
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Western Australian Herbarium (1998–). FloraBase—the Western Australian Flora. Department of Biodiversity, Conservation and Attractions. https://florabase.dpaw.wa.gov.au/