| Researcher(s) |
Rebekah Allen Chris Davey Kaidy Morgan Mikaela Tiller |
|---|---|
| Year(s) | 2025 |
| Contributor | Hart Field Site Group |
| Trial location(s) |
Hart, SA
|
| Further information | View external link |
1. Demonstrate crop safety and weed control for a range of pre-emergent herbicides in wheat across two starting soil moisture conditions.
2. Demonstrate the implications of increasing sowing speed and sowing depth on wheat crop safety.
• The 2025 season was not conducive to excessive pre-emergent herbicide crop effect. There were few, if any, large or intense rainfall events at, or around the time of sowing, for both time of sowing (TOS) treatments. This led to the observation of minimal phytotoxicity of the emerging wheat plants.
• Sowing dry in April reduced plant establishment when compared to sowing into moisture in June. However, no difference in yield was observed.
• Minor phytotoxicity was observed (up to 8%), however this was temporary and did not affect final yield or quality in the TOS trial.
• Pre-emergent herbicides with high solubilities did not cause significant crop effect in 2025. Conversely, those herbicides with low solubilities may not have had acceptable weed control, as they did not receive enough rain to “activate” the active ingredient.
| Lead research organisation | N/A |
|---|---|
| Host research organisation | N/A |
| Related program | N/A |
| Acknowledgments |
We would like to acknowledge the South Australian Drought Resilience Adoption and Innovation Hub (SA Drought Hub) for their financial contribution to conduct these trials at Hart. We would also like to thank the various growers, advisors and collaborators involved across treatment design and implementation of the trials |
| Other trial partners | Not specified |
| Crop type | Cereal (Grain): Wheat |
|---|---|
| Treatment type(s) |
|
| Trial type | Experimental |
| Trial design | Replicated |
| Sowing machinery |
A small-plot knife-point press wheel seeder on 23 cm row spacings. |
|---|---|
| Sow date | 24 April and 13 June, 2025 |
| Harvest date | 3 December 2025 |
| Plot size | 1.75m x 10m |
| Plot replication | Not specified |
| Fertiliser |
Seeding: TOS DAP (18:20) Zn 1% + Flutriafol at 100 kg/ha |
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.
