GRDC Grains Research Update Adelaide 2019
Presented at:
Proceedings of the 2019 Adelaide GRDC Grains Research Update. Topics include how to earn community trust in agriculture, international grain competitors, under-performing sandy soils, emerging pulse root diseases in South Australia and more.
This page contains update papers presented at the .
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Presented at
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• The seasonal risk of spring diamondback moth outbreaks in canola starts in autumn, driven by pre-season rainfall patterns. • Brassicaceous weeds allow insecticide-resistant diamondback moth to persist during summer in canola-growing areas of South Australia (SA). • A new insecticide resistance management strategy is available for the diamondback ...
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• Mouse numbers are currently low across most regions of southern New South Wales, South Australia and northwest Victoria. At this stage, there is low potential for economic damage at sowing in 2019. • Information about changes in mouse numbers in the lead up to the 2019 sowing can be accessed from the mouse monitoring updates published at https://...
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• There is increasing incidence of Group J herbicide resistance in annual ryegrass across southern Australia. • Cross-resistance to the Group K herbicides, including Sakura®, has occurred. • Glasshouse studies using phorate suggest P450 enzymes conferring resistance to Group J herbicides. • Resistance to Group K herbicide pyroxasulfone is most l...
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• Disease symptoms on canola are caused by a variety of pathogens. Correct identification is critical to ensure appropriate control strategies are selected. Use the GRDC Back Pocket guide or Canola: the ute guide, for disease identification. • Blackleg and sclerotinia stem rot most commonly cause significant yield loss. Whilst other diseases can be...
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• A newly released herbicide tolerant faba bean provides increased weed management options. A new release lentil provides another herbicide tolerant lentil variety with different agronomic characteristics. However, care still needs to be taken in relation to herbicide use, paddock selection, and herbicide permits and registrations. • Chickpea and f...
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• Be flexible and pro-actively manage stubble for your seeding system. • Diversify your crops and practices as the platform for farming profitably with stubble. • A critical threshold of 2-3t/ha provides most of the benefit but read on for 10 more key lessons to retain more stubble profitably – to save soil, water and $50-$100/ha....
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• Highest yields for winter wheats come from early to late April establishment. • Highest yields of winter wheats sown early are similar to Scepter sown in its optimal window. • Slower developing spring varieties are not suited to pre-April 20 sowing. • Different winter wheats are required for different environments. • Flowering time cannot be ma...
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• Liming efficiency can be greatly improved through the use of pH mapping and variable rate technology. • Veris® pH sensors (Antimony probes) have a good relationship with soil pH and can produce accurate maps for variable rate lime application....
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• Nitrogen (N) rate needs to be adjusted to account for (a) sowing date, (b) cultivar, in order to capture the potential of new cultivars, and (c) elevated temperature. • A modest increase of temperature; <1.7oC above ambient before flowering, reduced grain number and yield in unfertilised crops but not in fertilised crops. • Nitrogen rate could b...
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• Pulse crops can suffer from root diseases. • Next generation sequencing (NGS) technology has potentially identified multiple pathogens of economic significance on South Australian (SA) crops — further work needs to determine which are the most important. • Intensification of pulses in cropping rotations can increase pulse soilborne diseases. • If...
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