| Researcher(s) |
Navneet Aggarwal Fabio Arsego Peter Boutsalis Brian Dzoma Blake Gontar Wendy Li Lam McMurray Helena Oakey Amanda Pearce Penny Roberts |
|---|---|
| Year(s) | 2017 |
| Contributor | Hart Field Site Group |
| Trial location(s) |
Hart, SA
Maitland, SA |
| Further information | View external link |
To understand changes in weed and herbicide resistance, in response to low or high use of IMI herbicides in high intensity break crop rotations (at least two break crops in the last 5-6 years) across different regions of South Australia through a paddock survey in 2017.
To investigate the pre-emergent herbicide Ultro® (1700 g/ha with active carbetamide, Group E) which is currently in development.
To compare Ultro® to propyzamide (900 g/kg @ 1000 g/ha), Sakura (118 g/ha) and Boxer Gold (2500 mL/ha) in controlling dim-resistant ryegrass in lentil.
• Controlling Group A and B herbicide resistant annual ryegrass and Group B resistant common sowthistle in break crops is becoming increasingly challenging.
• Resistance in ryegrass to pre-emergence herbicides such as Boxer Gold® and Sakura® has been confirmed in high break crop intensity systems.
• Paddock survey results showed common sowthistle from paddocks with high IMI-use history had high incidence of IMI resistance. However, IMI resistance levels in paddocks where only sulfonylureas had been used, raises concern for resistance development to IMIs in other broadleaf weeds.
• The Group B tolerant faba bean PBA Bendoc provides a new opportunity for managing broadleaf weeds.
• Crop competition has the potential to reduce seed set of broad leaf weeds in some break crops.
| Lead research organisation | N/A |
|---|---|
| Host research organisation | N/A |
| Trial funding source | GRDC DAS00168-BA |
| Related program | N/A |
| Acknowledgments |
The research undertaken as part of this project is made possible by the significant contributions of growers through both trial cooperation and support of GRDC and SARDI, and the authors would like to thank them for their continued support. The authors are highly thankful to Christopher Preston, Gurjeet Gill, Rick Llewellyn, Ben Fleet an d Sam Kleemann for their scientific input. The selection of focus paddocks would not have been possible without the help of Andrew Parkinson, Chris Davey, Craig Davis, Jeff Braun, Michael Brougham, Peter Cousins, Peter Hooper, Sam Holmes, Sam Trengove and respective growers. The assistance received from Ruwan Lenorage in herbicide resistance screening work is highly acknowledged. Authors also thank Ashley Pilkington for making |
| Other trial partners | Not specified |
| Crop type | Grain Legume: Lentils |
|---|---|
| Treatment type(s) |
|
| Trial type | Experimental |
| Trial design | Replicated |
| Sow date | 31 May 2017 |
|---|---|
| Harvest date | Unknown |
| Plot size | Not specified |
| Plot replication | Not specified |
| Sow date | 6 June 2017 |
|---|---|
| Harvest date | Unknown |
| Plot size | Not specified |
| Plot replication | Not specified |
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.
