Researcher(s) |
Sam Trengove |
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Contact email | jordanpbruce@gmail.com |
Year(s) | 2021 |
Contributor | Trengove Consulting |
Trial location(s) |
Alford, SA
Bute, SA |
To examine crop safety and broadleaf weed control implications for various herbicides and combinations in lentils.
• Lentil crop safety varied significantly between acidic and alkaline sands in 2021 trials, with the use of Reflex®, diuron, metribuzin and terbuthylazine herbicides, with alkaline sand sites incurring more herbicide damage than acidic sand sites.
• Crop damage with Reflex® herbicide on alkaline sands was rate responsive, with yield loss in a trial at Bute increasing from 17% when applied at 0.5L/ha to 54% when applied at 1L/ha.
• Crop damage on alkaline sands was cumulative where Reflex® was applied in combination with a group 5 herbicide, such as diuron. In a trial at Alford on an alkaline sand, yield loss to either diuron or Reflex® was 20%, increasing to 52% yield loss when applied in combination.
• Seasonal variation, including higher rainfall post-seeding in 2021 may have been a contributing factor in higher level of crop damage in alkaline sandy soils.
• Effective control of broadleaf weeds such as bifora, common sow thistle, Indian hedge mustard, wild turnip and capeweed, including populations resistant to Group 2 imidazolinone herbicides, was achieved with Reflex® (Group 14 herbicide).
• Control of various broadleaf weeds was achieved in lentil using Reflex® in combination with other registered herbicides including Group 2, 5 and 12 herbicides. However, crop safety to these combinations varied between herbicides and their doses, and soil type.
• Herbicide strategies on high-risk alkaline sandy soil types needs careful planning to balance between avoiding crop damage and achieving adequate weed control. Rate of Reflex may need to be adjusted near the middle of the rate range in some soil types to find the right balance of crop safety and weed control.
Lead research organisation |
Trengove Consulting |
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Host research organisation | N/A |
Trial funding source | SAGIT TC121 |
Trial funding source | GRDC UOA2105-013RTX |
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 the support of the GRDC, the authors would like to thank them for their continued support. The authors also thank SAGIT for their support. The help received from SARDI Clare team in the field work is greatly appreciated. Authors also thank Jason Sabeeney for making available the herbicide Reflex® for the current research studies. |
Other trial partners | SARDI |
Crop type | Grain Legume: Lentils |
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Treatment type(s) |
|
Trial type | Experimental |
Trial design | Randomised,Replicated,Blocked |
Sow date | Not specified |
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Harvest date | Not specified |
Plot size | Not specified |
Plot replication | Not specified |
Herbicide | Not specified |
Other trial notes |
References |
Sow date | Between 26 May and 4 June 2021 |
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Harvest date | Unknown |
Plot size | Not specified |
Plot replication | 3 |
Herbicide |
Please see attached report for herbicide methods and results. |
Other trial notes |
References |
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.