| Researcher(s) |
Rohan Brill Nick Poole |
|---|---|
| Year(s) | 2022 |
| Contributor | Field Applied Research (FAR) Australia |
| Trial location(s) |
Wallendbeen, NSW
|
Determine the key timings for fungicide protection and the value of varietal resistance for blackleg management in hyper yielding Canola.
Sub trial 1. Glyphosate tolerant canola
• The complete fungicide treatment was higher yielding than nil and late fungicide in both 45Y28 RR and Condor TF.
• The benefit of the Complete treatment is from the extra protection provided by Saltro on the seed and Prosaro at 4-6 leaf stage to protect crown canker blackleg.
• When counted at maturity, there were more plants in the Complete treatment in 45Y28 RR compared to Nil and Late, but fungicide had no effect on plant numbers in Condor TF.
• The Complete treatment reduced crown canker blackleg infection (proportion of cross section of stem infected with blackleg at maturity) in both varieties.
• There were small effects of fungicide treatment on both upper canopy blackleg and sclerotinia stem rot (data not shown) but despite the wet year these diseases were both at surprisingly low levels. Sclerotinia stem rot averaged only 2% of plants infected with no fungicide treatment.
Sub trial 2. Triazine tolerant canola
• There was a grain yield response of approximately 0.6 t/ha in ATR Wahoo where the complete fungicide management strategy was used compared with the late and full strategy, but there was no yield response in the more resistant variety HyTTec Trifecta. This response shows that the key timing for disease control in this trial was for early crown infection rather than later upper canopy diseases e.g. sclerotinia stem rot and upper canopy blackleg.
• The complete fungicide treatment had higher plant numbers at maturity in ATR Wahoo and lower crown canker infection.
• Upper canopy disease levels were low overall, with 4% infection of main stems with sclerotinia stem rot (untreated).
Trial design: Factorial (Variety x Foliar)
Variety: 45Y28RR & HyTTec Trifecta
2021 Crop: Wheat
2020 Crop: Canola
2019 Crop: Pasture
Soil type: Red Ferrosol
Available Nitrogen (kg/ha) 0-60cm: 180
Colwell P 0-10cm: 35mg/kg
pH (CaCl2) 0-10cm: 5.4
Organic Carbon 0-10cm: 3.1
| Lead research organisation |
Field Applied Research (FAR) Australia |
|---|---|
| Host research organisation |
Brill Ag |
| Trial funding source | GRDC FAR2004-002RTX |
| Related program | N/A |
| Acknowledgments | N/A |
| Other trial partners | Field Applied Research (FAR) Australia |
| Crop type | Oilseed: Canola |
|---|---|
| Treatment type(s) |
|
| Trial type | Experimental |
| Trial design | Randomised,Replicated |
| Sow rate or Target density | 45 plants/m2 |
|---|---|
| Sow date | 25 April 2022 |
| Harvest date | 21 December 2022 |
| Trial design method | O Other |
| Trial design arrangement | 6 rows x 4 cols |
| Total plots | 24 |
| Plot size | Not specified |
| Plot replication | 4 |
| Psuedoreplication | N |
| Plot randomisation | Y |
| Fertiliser |
Sowing Fertiliser: 130 kg/ha MAP (in-furrow) & 180 kg/ha Single Super (broadcast pre-sow). |
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.
