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Para grass management and costing trial within Kakadu National Park

McMaster, Damien, Adams, Vanessa M., Setterfield, Samantha A., McIntyre, Daniel L. and Douglas, Michael M. (2014). Para grass management and costing trial within Kakadu National Park. In: 19th Australasian Weeds Conference: Science, Community and Food Secrurity: the Weed Challenge, Hobart, Australia, 1-4 September 2014.

Document type: Conference Paper
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IRMA ID 84373604xPUB52
Author McMaster, Damien
Adams, Vanessa M.
Setterfield, Samantha A.
McIntyre, Daniel L.
Douglas, Michael M.
Title Para grass management and costing trial within Kakadu National Park
Conference Name 19th Australasian Weeds Conference: Science, Community and Food Secrurity: the Weed Challenge
Conference Location Hobart, Australia
Conference Dates 1-4 September 2014
Conference Publication Title AWC Proceedings 19th Australasian Weeds Conference (2014)
Place of Publication Australia
Publisher Tasmanian Weed Society
Publication Year 2014
ISBN 978-0-646-92454-0   (check CDU catalogue open catalogue search in new window)
Start Page 129
End Page 133
Total Pages 5
HERDC Category E1 - Conference Publication (DIISR)
Abstract Para grass (Urochloa mutica (Forssk.) T.Q.Nguyen) is an environmental weed that forms dense monocultures on Australia’s tropical floodplains. It is a weed of particular concern for Kakadu National Park managers and the Indigenous Traditional Owners. To inform the design of a large-scale management program of para grass in Kakadu, we collected distribution and control data. This information will be incorporated into a weed risk and management model for Kakadu. Here we report on the initial data collection findings. The large-scale aerial survey to map the distribution of para grass across the Kakadu floodplains showed extensive areas of infestations in a range of density and size classes. The cover of para grass in Kakadu is now estimated to be over 3200 ha. A field trial was established using six management plots (6.25 ha) to estimate the cost and effectiveness of para grass control. The density of infestations ranged from low (1–10%), medium (10–50%) and high (>50%). Following the current ‘best practice’ management, plots were burnt and sprayed one month later with glyphosate. Data including labour, vehicle and chemical costs were recorded. Treatment cost for high, medium and low density plots was approximately $2770, $1150 and $520, respectively. Based on the current distribution of para grass it would cost over $2.3 million for an initial treatment of all infestations in the park. Because of the large costs of this approach, this information is now being used to explore more cost effective management strategies including containment areas and aerial spraying
Keyword Urochloa mutica
Strategic weed management
Weed mapping
Management costs
Description for Link Link to published version
URL http://www.caws.org.au/awc_contents.php?yr=2014
 
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Created: Wed, 19 Aug 2015, 16:40:55 CST