Researcher(s) |
Nick Poole Darcy Warren |
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Year(s) | 2020 |
Contributor | Field Applied Research (FAR) Australia |
Trial location(s) |
Wallendbeen, NSW
|
To develop profitable and sustainable approaches to disease management in high yielding and HRZ regions.
Individual objectives specific to the trial were:
- Monitor the effectiveness of fluxapyroxad (Systiva) for early disease control in wheat.
- To evaluate whether newer germplasm or new fungicide chemistry allows a reduction in the number of fungicide applications whilst increasing profitability (note: reducing the number of fungicides is seen as a key measure for slowing down resistance development in cropping systems).
- Examine whether there is germplasm (varieties tested) that has sufficient early season disease resistance to replace the need for the Timing 1 (T1) spray applied at GS31-32.
- To determine the cost benefit ratio of fungicide application in HRZ regions of different season lengths.
• The feed winter wheats RGT Accroc and Anapurna significantly out yielded all other cultivars at all three levels of disease management and achieved over 10t/ha with fungicide input.
• There was a significant interaction between cultivar and fungicide management with the stripe rust susceptible cultivars Trojan and DS Bennett giving yield responses of 5.27 and 3.07 t/ha to a single flag leaf fungicide compared to less than a 1t/ha with the majority of cultivars.
• Septoria tritici blotch (STB) was the principal disease in untreated crops of Scepter and Beckom, whilst stripe rust was the main disease in Trojan, DS Bennett, Coolah, RGT Accroc and Catapult. Other cultivars were subject to low levels of both stripe rust and STB disease pressure.
• Only Trojan, Catapult, Coolah and DS Bennett gave significant yield increases to the application of four units of fungicide (seed treatment and three foliar fungicides) over a single flag spray.
• It was noted that compared to lower altitude locations stripe rust infection was relatively later at the Wallendbeen, NSW location (540m above sea level).
• Note of caution. At the southern Victorian location at Gnarwarre Trojan was almost completely defoliated in the lower canopy under the one spray regime compared to Wallendbeen and the 1 spray approach was little better than the untreated (both approaches yielding under 3t/ha).
• The significant interaction observed in grain yields was also apparent in the grain quality (test weights and screenings).
Rotation position: Canola 2018, Wheat 2019.
Soil type: Clay loam
Lead research organisation |
Field Applied Research (FAR) Australia |
---|---|
Host research organisation | N/A |
Trial funding source | GRDC FAR2004-002SAX |
Related program |
FAR Hyper Yielding Crops 2020-2022 |
Acknowledgments | N/A |
Other trial partners | Not specified |
Crop type | Cereal (Grain): Wheat |
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Treatment type(s) |
|
Trial type | Experimental |
Trial design | Randomised,Replicated,Blocked |
Sow rate or Target density | 180 seeds/m2 (150 plants/m2 target) |
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Sow date | 22 April 2020 |
Harvest date | 28 November, 2020 (spring cultivars) & 14 December, 2020 (winter cultivars) |
Plot size | Not specified |
Plot replication | Not specified |
Psuedoreplication | Not specified |
Fertiliser |
Please see trial report for treatment details |
Fungicide |
Please see trial report for treatment details |
Seed treatment | As per treatment list |
SILO weather estimates sourced from https://www.longpaddock.qld.gov.au/silo/
Jeffrey, S.J., Carter, J.O., Moodie, K.B. and Beswick, A.R. (2001). Using spatial interpolation to construct a comprehensive archive of Australian climate data , Environmental Modelling and Software, Vol 16/4, pp 309-330. DOI: 10.1016/S1364-8152(01)00008-1.