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crown rot risk

Catalogue: GRDC Publications
" Goondiwindi GRDC Grains Research Update Day 1 - Tuesday 4 th March Time Topic Speaker (s) 10:00 AM James Clark (Chair Northern Welcome Panel GRDC) 10:10 AM General plenary (Supported by North West Local Land Services) 10:10 AM 10:40 AM.. Overall, both models are acceptable for modelling soil evaporation over a range of soils and seasons provided accurate soil physical properties and starting water states are known... Overall, populations increased five times compared to before planting the summer crops, but remained below 250/kg soil (Figure 4)...
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Catalogue: GRDC Updates
Over the three survey years this allowed 307 comparisons of Fusarium DNA levels assessed at sowing using PreDicta B with the actual incidence of infection that developed by harvest as determined from laboratory plating (Table 1)... The predicted risk of crown rot development at sowing using PreDicta B was within one category of the actual level of infection measured after harvest in 121 paddocks (39%, light grey shading)... In other regions a shallower sampling depth (0-10 cm or 0-15 cm) is recommended with PreDicta B. In 2013 we aimed to determine if this deeper sampling depth in the northern region, to account for RLN populations deeper in the soil profile, is potentially compromising the accuracy of PreDicta B to measure levels of other soil-borne pathogens including Fusarium ...
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Catalogue: GRDC Publications
Nematodes reduce yields in intolerant wheat cultivars Nematodes reduce the amount of water available for plant growth Nematodes impose early stress that reduces yield potential despite the availability of water and nutrients Maintaining a low nematode population improves crop yields.. Overall, populations increased five times compared to before planting the summer crops, but remained below 250/kg soil (Figure 4)... Data is presented as an average of the added CR and no added CR treatments for this site...
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Catalogue: GRDC Publications
Over the three survey years this allowed 307 comparisons ofFusarium DNA levels assessed at sowing using PreDicta B with the actual incidence of infection that developed by harvest as determined from laboratory plating (Table 1)... The predicted risk of crown rot development at sowing using PreDicta B was within one category of the actual level of infection measured after harvest in 121 paddocks (39%, light grey shading)... Some newer wheat varieties have a measurable improvement in their tolerance to crown rot but these current levels are not a complete solution to crown rot...
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Catalogue: GRDC Media
Current research is helping boost the accuracy of the PreDicta B test in assessing crown rot risk by fine tuning soil sampling techniques and recommendations... PreDicta B is a good technique for identifying the level of risk for crown rot and other soil-borne pathogens prior to sowing within paddocks but requires a dedicated sampling strategy and is not a simple add on to a soil nutrition test... There is no detection issue with the current PreDicta B tests that were resulting in an underestimation of crown rot risk...
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Catalogue: GRDC Media
Research delivers gains in crown rot risk management.. PreDicta B is a good technique for identifying the level of risk for crown rot and other soil-borne pathogens prior to sowing within paddocks but requires a dedicated sampling strategy and is not a simple add on to a soil nutrition test... There is no detection issue with the current PreDicta B tests that were resulting in an underestimation of crown rot risk...
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Catalogue: GRDC Updates
We are conducting a series of trials to establish if varieties which have a higher crown rot resistance rating are beneficial in the southern NSW farming region and if the currently grown more susceptible varieties show effective tolerance... To yield we have assessed the extent of crown rot infection that occurred in the varieties (Figure 2)... The results contrast to previous findings in Victoria and will require validation in the current season as we continue to monitor what happens to the level of inoculum and its ability to infect plants in 2013...
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Catalogue: Ground Cover
Northern New South Wales grower and agronomist Drew Penberthy is road-testing new research findings on a DNA-based soil test to help better predict crown rot risk in northern farming systems... "New soil sampling techniques for the PreDicta B test could provide savings in terms of the preparation and analysis of stubble testing for crown rot," Drew says... Drew, who also runs a business that provides stubble testing for crown rot and soil testing for root lesion nematodes, says most growers in the northern grains region undertake two separate tests for these cereal pathogens...
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Catalogue: GRDC Media
He added that the use of the DNA based soil testing services prior to sowing was showing potential in identifying crown rot in the northern region, but required a stringent sampling strategy... "In recent years, use of the DNA based soil testing service PreDicta B has proved a reliable indicator of nematode populations but question marks have been raised by industry over its accuracy in assessing crown rot risk within the northern region," Dr Simpfendorfer said... "PreDicta B is a good technique for identifying the level of risk for crown rot and other soil-borne pathogens prior to sowing within paddocks but requires a dedicated sampling strategy and is not a simple add-on to a soil nutrition test...
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Catalogue: GRDC Media
Stringent sampling needed to assess crown rot risk.. "In recent years, use of the DNA based soil testing service PreDicta B has proved a reliable indicator of nematode populations but question marks have been raised by industry over its accuracy in assessing crown rot risk within the northern region," Dr Simpfendorfer said... "PreDicta B is a good technique for identifying the level of risk for crown rot and other soil-borne pathogens prior to sowing within paddocks but requires a dedicated sampling strategy and is not a simple add-on to a soil nutrition test...
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