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disease incidence

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Catalogue: GRDC Publications
Published: May 2012 ISBN: 978-1-921779-19-0 In submitting this report, the researchers have agreed to the GRDC publishing this material in its edited form... Incidence is 40 per_cent frequency in 25 per_cent of the area, so that the average incidence of the disease affecting the crop is 10 per_cent... Eighteen, including all the fungal diseases, of the 21 diseases surveyed were reported as present on lentils in the 8.3 Diseases of lentils Southern Region and in Australia...
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Catalogue: GRDC Publications
CuRRenT AnD POTenTiAl COsTs fROM DiseAses Of OilseeD CROPs in AusTRAliA | 37 | GRDC a marked difference in present losses between the Northern and Southern Regions: disease loss in the Northern is 21.6 sper cent of the gross value of production and 6.3 per cent in the Southern... GRDC | 40 | CuRRenT AnD POTenTiAl COsTs fROM DiseAses Of OilseeD CROPs in AusTRAliA 5.3.2 Distribution of the pathogens in Australia Nineteen of the 32 diseases surveyed were reported as present in one or more zones in Australia... Overall, oilseed diseases have the potential to cause very significant costs for farmers...
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Catalogue: GRDC Research Summaries
There has been a considerable increase in the incidence of crops affected by root lesion nematode (RLN) throughout the Western Australian (WA) cropping region... The recent root disease survey showed that the highest levels of all root diseases in WA are in the southern high rainfall zone... The objectives of the project are to:1) Identify sites in WA that are suppressive to one or more root diseases of wheat including take-all, rhizoctonia root rot, crown rot and RLN. Sites will be selected from three past and current projects including the DAFWA "Profitable crop sequencing in WA" [P. WHITE, M. HARRIES] project (which will establish 150 focus sites at which inoculum level and disease incidence will be measured), the "Soil Quality" [D. MURPHY] project (which has previously established a large number of geo-referenced monitoring sites around the WA agricultural region and the inoculum level was measured), and the DAFWA 2006-2008 cereal root disease survey sites [DAW00159]...
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Catalogue: GRDC Research Summaries
Rhizoctonia bare patch disease remains an important but unpredictable disease for cereals in the southern Australian agricultural region... Management of natural disease suppressive ability of soils has been suggested as a potential solution to control Rhizoctonia bare patch disease... The project will address (i) the shorter-term solutions such as rotation, tillage and fungicides to reduce disease incidence and increase plant growth and yield and (ii) will develop new knowledge that will assist in a longer-term control of Rhizoctonia through improving our understanding and management of natural soil suppressive activity & improved prediction of disease occurrence...
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Catalogue: GRDC Research Summaries
There has been a considerable increase in the incidence of crops affected by root lesion nematode (RLN) throughout the Western Australian (WA) cropping region... The recent root disease survey showed that the highest levels of all root diseases in WA are in the southern high rainfall zone... The objectives of the project are to:1) Identify sites in WA that are suppressive to one or more root diseases of wheat including take-all, rhizoctonia root rot, crown rot and RLN. Sites will be selected from three past and current projects including the DAFWA "Profitable crop sequencing in WA" [P. WHITE, M. HARRIES] project (which will establish 150 focus sites at which inoculum level and disease incidence will be measured), the "Soil Quality" [D. MURPHY] project (which has previously established a large number of geo-referenced monitoring sites around the WA agricultural region and the inoculum level was measured), and the DAFWA 2006-2008 cereal root disease survey sites [DAW00159]...
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Catalogue: GRDC Research Summaries
We propose to use a polyphasic approach involving (i) comparative analysis of high- and low-suppressive soils, (ii) pre-treatment or prior exposure of soils to factors that have been attributed to the development of disease suppression and (iii) amplification of target regions prior to high-throughput sequencing... The use of direct soil DNA/RNA extraction technologies will help overcome the bottlenecks associated with the culture based methods... We propose to establish close working links with other projects in SBI-Theme 3 for field sites used, consistency in methodologies and complementary research approaches...
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Catalogue: GRDC Research Summaries
We propose to use a polyphasic approach involving (i) comparative analysis of high- and low-suppressive soils, (ii) pre-treatment or prior exposure of soils to factors that have been attributed to the development of disease suppression and (iii) amplification of target regions prior to high-throughput sequencing... The use of direct soil DNA/RNA extraction technologies will help overcome the bottlenecks associated with the culture based methods... We propose to establish close working links with other projects in SBI-Theme 3 for field sites used, consistency in methodologies and complementary research approaches...
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Catalogue: GRDC Final Reports
The main objective of this project was to develop improved prediction and better management options for controlling Rhizoctonia disease through identification of critical regulating factors influencing R. solani , microbial activity and host plants... It should be noted that multiple summer rainfall events reduce the Rhizoctonia pathogen inoculum levels from high to lower disease risk, whereas prolonged dry periods can even cause an increase in inoculum levels... Results from multiple sites in SA and NSW indicated that inoculum levels were generally reduced after non-cereal rotation crops including peas, medic pasture and fallowing compared to cereal crops...
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