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3Rd WSV Conference Proceedings 2007 Weed Society of Victoria Inc. PROCEEDINGS THIRD VICTORIAN WEED CONFERENCE Earth Wind Fire Water and Weeds SPONSORED BY Blank page PROCEEDINGS THIRD VICTORIAN WEED CONFERENCE Earth Wind Fire Water and Weeds 3–4 October 2007 All Seasons International Hotel, Bendigo Weed Society of Victoria Inc. PO Box 987, Frankston, Victoria 3199 Tel/fax 03 9576 2949 Email [email protected] Website www.wsvic.org.au This spring the Defeating the Weed Menace (DWM) Programme, the Australian Government’s $44.4 million commitment to national action on Australia’s most threatening weeds, will launch a new website - www.weeds.gov.au - in mid September to help people identify which plants can be a problem in their local area and to provide advice on how to manage these plants. A print advertising and editorial campaign targeting gardeners and hobby farmers in peri-urban areas will run from September 2007 to March 2008. Copies of the advertisements and other resource materials will be available on the website. While the majority of people targeted by the campaign will be directed to the website www.weeds.gov.au for further information, enquiries are also likely to be received by state, regional and local governments and nursery retailers for information about weeds issues specific to their local area. PROGRAM DAY 1 WEDNESDAY 3 OCTOBER 2007 07.15 – 08.50 REGISTRATION 08.50 – 09.00 WELCOME President, Weed Society of Victoria SESSION 1 KEYNOTE SPEAKERS Chair: Ken Young 09.00 – 10.00 Future weed management in a changing environment – socially, politically and physically Rick Roush, The University of Melbourne, Parkville 10.00 – 10.30 Climate change impacts on weeds in southern Australia Darren Kriticos, Ensis, Canberra 1 10.30 – 11.00 MORNING TEA SESSION 2 EARTH WIND FIRE WATER AND WEEDS Chair: Daniel Joubert 11.00 – 11.30 EARTH The effects of land management on weed seed longevity Ken Young, The University of Melbourne, Dookie 6 11.30 – 12.00 WIND How far do weed seeds actually travel? Roger Cousens, School of Resource Management, The University of Melbourne, Burnley 9 12.00 – 12.30 FIRE Post-fi re weed management: lessons from the Victorian Alps Charlie Pascoe, Parks Victoria, Bright 10 12.30 – 13.00 WATER Identifying appropriate aims and management approaches for aquatic weeds Nigel Ainsworth, Department of Sustainability and Environment, Melbourne 13.00 – 14.00 LUNCH AND POSTER SESSION SESSION 3 EARTH WIND FIRE WATER AND WEEDS Chair: Ian Faithfull 14.00 – 14.20 How can willow sawfl y aid our willow management? Fiona Ede, Department of Primary Industries, Frankston 19 14.20 – 14.40 Response of Brazilian milfoil (Myriophyllum aquaticum) to salinity and water-level fl uctuations # and its potential to invade wetlands of the Gippsland Lakes, south-east Victoria Mark Toomey, Institute for Sustainability and Innovation, Victoria University 22 14.40 – 15.00 Aquatic weeds and their impact in irrigation systems experiencing drought within Victoria # Tim Nitschke, Goulburn-Murray Water Aquatic Plant Services 28 15.00 – 15.20 Predicting the potential distribution of orange hawkweed on the Bogong High Plains using a dispersal constrained habit suitability model Nick Williams, School of Resource Management, The University of Melbourne 30 15.20 – 15.50 AFTERNOON TEA SESSION 4 TACKLING WEEDS ON PRIVATE LAND Chair: Lisa Minchin 15.50 – 16.20 Measurement of changes in stakeholder weed management attitudes and actions over the life of the Tackling Weeds on Private Land initiative # Catriona King, Department of Primary Industries, Seymour 31 16.20 – 16.50 Tackling weeds on private land Helen Anderson, Department of Primary Industries, Hamilton 37 16.50 – 17.20 Weed management practice change within organisations Mark Farrer, Department of Primary Industries, Stawell 19.00 CONFERENCE DINNER Weed Society of Victoria Third Biennial Conference ‘Earth Wind Fire Water and Weeds’ 3–4 October 2007 v DAY 2 THURSDAY 4 OCTOBER 2007 08.00 – 08.30 REGISTRATION SESSION 5 WEED MANAGEMENT Chair: Andrew Clark 08.30 – 09.00 Innovations in spraying techniques, will they enable less herbicide to be used? # Harry Combellack, Spray Smart Enterprises 42 09.00 – 09.30 Prioritising roadsides and reserves for weed control in the Shire of Yarra Ranges # David Blair, Shire of Yarra Ranges 48 09.30 – 10.00 Grassy weeds as fi ery competitors or phantom companions? – Lessons learnt from conservation and land management Colin Hocking, Institute for Sustainability and Innovation, Victoria University 55 SESSION 6 WEED ALERT Chair: Daniel Joubert 10.00 – 10.30 The Victoria Weed Alert Program Stuart Lardner, Department of Primary Industries, Horsham 10.30 – 11.00 MORNING TEA 11.00 – 11.30 Horsetail (Equisetum spp.) and knotweeds (Fallopia spp.) – progress on eradication of two of Victoria’s State Prohibited Weeds Michael Hansford, Department of Primary Industries, Box Hill 58 CONCURRENT SESSIONS SESSION 7 Chair: Sarah Partington SESSION 8 Chair: Chris Knight 11.35 – 11.55 Early detection for water weeds in 11.35 – 11.55 Response of Chilean needle grass (Nassella Australia neesiana) and phalaris (Phalaris aquatica) Fiona McPherson, NSW Department of seedlings and mature plants to changes Primary Industries, Grafton Agricultural in soil phosphorus, nitrogen and soil pH Research and Advisory Station 61 Charles Grech, DPI, Attwood 77 11.55 – 12.15 Weed proofi ng Australia: a way forward 11.55 – 12.15 Arrowhead in Victoria: current control on invasive garden plants methods and potential for biological control # Nicola Thomson, WWF-Australia Jean-Louis Sagliocco, Department of [for Andreas Glanznig] 64 Primary Industries, Frankston 78 12.15 – 12.35 The role of the National Herbarium of 12.15 – 12.35 Weeding out Australia’s worst willows Victoria (MEL) in the documentation Jackie Steel, Department of Primary of new weeds. Val Stajsic and Alison Industries, Frankston 80 Vaughan, National Herbarium of Victoria 70 12.35 – 12.55 Improving provincial Victoria’s bio- 12.35 – 12.55 Community based quality assurance security by minimising the risk of new scheme weed introductions Brian Feldtmann, Dookie Land Stephen Young, Department of Primary Management Group, Dookie 90 Industries, Ballarat 75 13.00 – 14.00 LUNCH AND POSTER SESSION vi Weed Society of Victoria Third Biennial Conference ‘Earth Wind Fire Water and Weeds’ 3–4 October 2007 CONCURRENT SESSIONS SESSION 9 Chair: Michael Hansford SESSION 10 Chair: Kate Blood 14.00 – 14.20 An investigation of application techniques 14.00 – 14.20 Containing orange hawkweed (Hieracium for the control of various noxious and aurantiacum) infestations in the Ballarat environmental weeds with picloram area gel based herbicides # Simon Martin, Department of Primary Geoffrey Keech, Macspred Australia 92 Industries, Ballarat 109 14.20 – 14.40 Empowering gardeners to make 14.20 – 14.40 Alert and action on Nassella charruana informed choices when buying garden and a range of other National Alert List plants # species in Victoria Nicola Thomson, WWF-Australia 98 Sarah Partington, Department of Primary Industries, Bacchus Marsh 112 14.40 – 15.00 The use of radiation wavelengths to 14.40 – 15.00 The Victorian Weed Spotter network manage weeds # Catherine McInerney, Department of Ken Young, The University of Primary Industries, Geelong 116 Melbourne, Dookie 104 15.00 – 15.20 The impact of weeds on our roadside 15.00 – 15.20 Water hyacinth illegal trade in Victoria: secrets the trace back and forward of a State Karen Jones, Rural City of Wangaratta 107 Prohibited Weed Ryan Melville, Department of Primary Industries, Geelong 119 15.20 – 15.40 Seed bank spatial dynamics and plant invasions in Victoria’s western basalt plains grasslands Aaron Dodd, Department of Primary Industries, Bacchus Marsh 121 15.45 CLOSING REMARKS POSTERS Practice change by Victorian linear reserve managers Claire Norris, Department of Primary Industries, Geelong 122 Practice change within the Victorian fodder industry Claire Norris, Department of Primary Industries, Geelong 122 LIST OF ATTENDEES 123 REFEREED PAPERS The papers in this proceedings that went through the refereeing process are indicated by # at the end of their title in the program above. Referees: Ken Young and Kelly Raymond Weed Society of Victoria Third Biennial Conference ‘Earth Wind Fire Water and Weeds’ 3–4 October 2007 vii Blank page combined effects of climate (temperature, precipitation) and other global change Climate change impacts on weeds in southern components. The focus of this review is on temperature, soil moisture and the atmos- Australia pheric concentration of carbon dioxide (CO2). This paper discusses the projected Darren J. Kriticos, Ensis, PO Box E4008, Kingston, Australian Capital changes in climate and the mechanisms Territory 2604, Australia. by which global climate change is likely to affect weeds and their management in southern Australia. The likely impacts of these mechanisms are demonstrated in Summary Projected increases in atmos- future socio-economic development paths the context of southern Australia using pheric carbon dioxide concentrations and consequent greenhouse gas emis- the CLIMEX modelling package (Sutherst and concomitant increases in global tem- sions. These scenarios covered a very large et al. 2007). peratures are likely to result in signifi cant range in emissions increases, and when changes in weed distributions. Tropical and used as the basis for forcing global climate Direct impacts of increasing sub-tropical weeds are likely to advance models resulted in a wide range of global atmospheric carbon dioxide further south. Increases in carbon dioxide warming projections. The model based Carbon fertilisation effect could increase growth rates of plants due ‘best estimates’ range from 1.8°C for the In situations where CO2 is a limiting to the carbon fertilisation effect (CFE), and conservative B1 scenario, to 4.0°C for the growth factor, increased CO2 can have a increase their water use effi ciency (WUE). A1FI scenario (IPCC 2007). Subsequent to fertilising effect. This phenomenon has Whether potential gains in crop yield are the release of the IPCC Fourth Assessment been termed the carbon fertilisation effect realised will depend upon the net effects Report, Rahmstorf et al.
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