Ground Cover Supplement : GC Supplement - Root and crown diseases 2014
2 Introductiongetting to the root of the problem By dr Francis c. ogbonnaya A suite of new national grdc programs has launched a fresh attack on root and crown diseases, which collectively cost Australian growers hundreds of millions of dollars in lost production and control costs each year. this Ground Cover Supplement reports on some of the activities from these national projects. CROWN ROT The national crown rot program, led by Dr Steven Simpfendorfer out of the New South Wales Department of Primary Industries, brings together crown rot researchers from across Australia to develop and extend integrated disease management strategies for this costly disease, which has grown to a $100-million issue in recent years. The project is also focused on refining the PreDicta B® pre-sowing test for the disease to enable growers to make more informed rotation and management choices before embarking on their cropping programs. The Crown Rot Initiative is concentrating on finding genetic solutions to the fungal disease, with pre-breeding research across Australia COVER PHOTO: DR DAMIEN HERDE, QUEENSLAND DAFF ground cover suPPlement edited by Janet Paterson identifying and sharing promising resistance genes for insertion into bread and durum wheat and barley. Molecular research is unravelling how the crown rot pathogen operates to cause disease and investigating the potential for novel sources of crown rot resistance to generate durable sources of resistance against the disease (see page 3). NEMATODES A new national nematode research, development and extension program started in July 2013 and is being led by Dr Grant Hollaway out of the Victorian Department of Environment and Primary Industries. The program spans the GRDC cropping regions and brings together nematode research specialists from across Australia. A key focus of the new program is to determine the tolerance ratings of crop varieties to nematodes and in doing so quantify the economic impact of the soil pathogen on crop yields in each GRDC region. Nematode resistance research will also continue under the national program to deliver crop rotation recommendations for winter and summer cropping systems across Australia. RHIZOCTONIA Widespread adoption of minimum tillage has exacerbated the impact of rhizoctonia across southern Australia, as cultivation has traditionally been a major control option. The soil-borne fungus is estimated to cost the cereal industry about $77 million in lost production each year. New banding fungicides for rhizoctonia control being trialled in GRDC-funded research across southern Australia are proving very promising and could be available to growers as early as 2015 (see page 18). PREDICTA B® The national molecular diagnostic program being coordinated by Dr Alan McKay out of the South Australian Research and Development Institute is charged with further refining and development of the soil disease prediction service PreDicta B®. PreDicta B® is used widely to assess the disease risk posed by soil-borne pathogens each season. New research is underway to make the test more accurate for crown rot and rhizoctonia and to promote the benefits of the testing service to the grains industry (see page 12). □ more information: Dr Francis C. Ogbonnaya, program manager protection traits, GRDC, 02 6166 4500 Ground Cover is brought to you by growers and the Australian Government through the publisher, the Grains Research and Development Corporation (GRDC). GRDC: 02 6166 4500, fax 02 6166 4599 Write to: The Editor -- Ground Cover, PO Box 5367, Kingston ACT 2604 Publishing Manager: Ms Maureen Cribb, GRDC, 02 6166 4500 Coretext: 03 9670 1168, fax 03 9670 1127, firstname.lastname@example.org, www.coretext.com.au Managing editor: Brad Collis Editor: Janet Paterson Production editor: Victoria Amy Advertising sales: Max Hyde, Hyde Media Pty Ltd, 03 5792 1314, fax 03 5792 1359, email@example.com Advertising is subject to terms and conditions published on the rate card, available from Hyde Media and on the website www.coretext.com.au Circulation: Ms Maureen Cribb, 02 6166 4500 Printing: Cadillac Printing, Adelaide ISSN 1039-6217 Registered by Australia Post Publication No. NAD 3994 Disclaimer: This publication has been prepared in good faith by the GRDC on the basis of the information available to us at the date of publication, without any independent verification. Neither the GRDC and its editors nor any contributor to this publication represent that the contents of this publication are accurate or complete; nor do we accept any responsibility for any errors or omissions in the contents, however they may arise. Readers who act on information from Ground Cover supplement do so at their own risk. The GRDC and contributors to Ground Cover supplement may identify products by proprietary or trade names to help readers identify particular types of products. We do not endorse or recommend the products of any manufacturer referred to. Other products may perform as well as or better than those specifically referred to. CAUTION: RESEARCH ON UNREGISTERED AGRICULTURAL CHEMICAL USE Any research with unregistered agricultural chemicals or of unregistered products reported in this document does not constitute a recommendation for that particular use by the authors or the authors' organisations. Copyright: © All material published in the Ground Cover supplement series is copyright protected and may not be reproduced in any form without written permission from the GRDC. All agricultural chemical applications must accord with the currently registered label for that particular agricultural chemical, crop, pest and region.
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