| Researcher(s) |
Ben Fleet Gurjeet Gill |
|---|---|
| Contact email | gurjeet.gill@adelaide.edu.au |
| Contact phone | 0428 592825 |
| Year(s) | 2022 |
| Contributor | School of Agriculture, Food and Wine - The University of Adelaide |
| Trial location(s) |
Gladstone, ACT
|
This field trial at Gladstone was undertaken to investigate factorial combinations of wheat seed rate and herbicides on the management of annual ryegrass.
Key messages
• Even though the increase in wheat plant density from 100 to 250 plants/m2 reduced ARG spike density by 19%, this was not statistically significant (P=0.225). However, ARG spike density was significantly affected by different herbicide treatments (P<0.001).
• Surprisingly Sakura® (pyroxasulfone) was relatively ineffective with more than 700 spikes/m2. In contrast, Overwatch® (bixlozone) treatment had significantly less ARG spike density. The most effective herbicide treatment was the combination of Overwatch® immediately before crop sowing (IBS) with early post-emergent (EP) Mateno Complete® (aclonifen, pyroxasulfone, and diflufenican).
• Overwatch® by itself produced wheat yield of 6.2 t/ha, which was almost 1 t/ha higher than Sakura®. The highest crop yield (7.03 t/ha) was achieved in the treatment where Overwatch® was followed by early post-emergent application of Mateno Complete®.
Variety: Scepter Wheat
Trial design: Factorial randomised block design
| Lead research organisation |
School of Agriculture, Food and Wine - The University of Adelaide |
|---|---|
| Host research organisation |
The University of Adelaide |
| Trial funding source | GRDC 9175134 |
| Related program |
GRDC - Weeds |
| Acknowledgments |
We thank GRDC for providing funding for this research. |
| Other trial partners | Not specified |
| Crop type | Cereal (Grain): Wheat |
|---|---|
| Treatment type(s) |
|
| Trial type | Experimental |
| Trial design | Randomised,Replicated,Blocked |
| Sow rate or Target density | 100, 150, 200 and 250 seeds/m2 |
|---|---|
| Sow date | 16 June 2022 |
| Harvest date | Unknown |
| Trial design method | O Other |
| Plot size | 1.83m x 10m |
| Plot replication | 3 |
| Plot randomisation | Y |
| Fertiliser |
At sowing – DAP + zinc + impact (18:20:0:2) @ 100 kg/ha. Urea (46:0:0) @ 100kg/ha late tillering (August 1) Urea (46:0:0) @ 100kg/ha at GS32 (September 13) |
| Herbicide |
Refer to the trial report for treatment details |
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.
