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suppression

Catalogue: GRDC Final Reports
PEM bacteria are important as they are common, suppress multiple diseases, interact with other organisms to increase suppression and can be correlated with reduced disease in the field... Crop selection could be used to increase suppressive microbes and enhance disease suppression on-farm... In summary, the project increased our understanding of disease suppression and the organisms involved, identified potential biocontrol inoculants that can reduce disease in the field as seed coatings to provide in-season Rhizoctonia disease control, and identified a potential strategy using crop selection to increase naturally occurring disease suppression in the field to provide long-term control of soilborne fungal diseases...
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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: Ground Cover
Data presented showed that farm practices that have a positive impact on soil biology include no-till, effective crop sequencing (rotations), lime applications and building up soil carbon... Soil microbiologist Dr Lori Phillips of the Victorian Department of Environment and Primary Industries (DEPI) says there are direct links between the microbes that release nitrogen from crop residues and soil sources, and the microbes that convert fertiliser nitrogen to crop-available nitrogen... In related research, the University of Western Australia's Professor Dan Murphy said his work had shown that organic molecules released from plant roots had more influence on the microbes that can retain (immobilise) nitrogen than soil organic carbon levels...
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Catalogue: GRDC Media
Soil suppression leads to nematode egression.. DAF Senior Soil Microbiologist at the Leslie Research Facility in Toowoomba, Dr Nikki Seymour said in glasshouse assays, P. thornei increased only 2-5 times in unheated soil compared with 17 times when soil was heated prior to planting to eliminate the general soil biological community... The impact of farm practices on the suppressiveness of soils to RLNs was studied as part of the project with results showing that factors such as pastures in rotation had a limited impact on soil suppression...
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Catalogue: GRDC Media
DAF Senior Soil Microbiologist at the Leslie Research Facility in Toowoomba, Dr Nikki Seymour said in glasshouse assays, P. thornei increased only 2-5 times in unheated soil compared with 17 times when soil was heated prior to planting to eliminate the general soil biological community... The impact of farm practices on the suppressiveness of soils to RLNs was studied as part of the project with results showing that factors such as pastures in rotation had a limited impact on soil suppression... "Research in the project has identified specific antagonists of the RLN - including some for the first time - in our northern grain growing soils more targeted research is required on how to measure and enhance of these organisms in our soil."..
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