Click on images to enlarge
infestation (Photo: Sheldon Navie)
habit (Photo: Sheldon Navie)
roots, stem and lower leaves (Photo: Sheldon Navie)
close-up of stem and leaf blade (Photo: Sheldon Navie)
seed-head (Photo: Sheldon Navie)
close-up of flower spikelets (Photo: Sheldon Navie)
close-up of seeds (Photo: Steve Hurst at USDA PLANTS Database)
Paspalum conjugatum P.J. Bergius
Gramineae (South Australia)Poaceae (Queensland, New South Wales, the ACT, Victoria, Tasmania, Western Australia and the Northern Territory)
buffalo grass, carabao grass, cow grass, Hilo grass, Hilograss, Johnston River grass, paspalum grass, sour grass, sour paspalum, sourgrass, T grass, t-grass, Thurston grass, ti grass, yellow grass
This species is thought to have originated in tropical America, but is now found throughout the tropical regions of the world (i.e. it is pan-tropical).
Widely naturalised in northern and eastern Australia (i.e. in northern Western Australia, in some parts of the Northern Territory, in northern and eastern Queensland and in the coastal districts of northern New South Wales). Also naturalised on Christmas Island.
Naturalised overseas in tropical and northern Africa, tropical Asia (e.g. Cambodia, China, Brunei, Malaysia, Singapore, Taiwan, Indonesia, the Philippines, Thailand, Vietnam and Papua New Guinea), Mauritius, the Seychelles and numerous Pacific islands (i.e. American Samoa, Western Samoa, the Cook Islands, the Galápagos Islands, Micronesia, Fiji, French Polynesia, Guam, the Marshall Islands, New Caledonia, Niue, Palau, the Solomon Islands and Hawaii).
Sourgrass (Paspalum conjugatum) is regarded as an environmental weed in Queensland, Western Australia and New South Wales. It prefers wetter habitats and is a serious weed of plantation crops (e.g. sugarcane), orchards, vineyards, irrigation channels, parks, lawns, roadsides, disturbed sites, waste areas and pastures in northern Australia. It also invades natural vegetation such as rainforest gaps and margins, watercourses and riparian areas.
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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