Crop safety and broadleaf weed control implications for various herbicides and combinations in lentil

2021

Research organisaton
Funding sources
Trengove Consulting

Trial details

Researcher(s) Sam Trengove
Contact email jordanpbruce@gmail.com
Year(s) 2021
Contributor Trengove Consulting
Trial location(s) Alford, SA
Bute, SA
Crop safety and broadleaf weed control implications for various herbicides and combinations in lentil locations
Aims

To examine crop safety and broadleaf weed control implications for various herbicides and combinations in lentils.

Key messages

• 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
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
Download the trial report to view additional trial information

Method

Crop type Grain Legume: Lentils
Treatment type(s)
  • Herbicide: Application Method
  • Herbicide: Type
Trial type Experimental
Trial design Randomised,Replicated,Blocked

Alford 2021

Sow date Not specified
Harvest date Not specified
Plot size Not specified
Plot replication Not specified
Herbicide Not specified
Other trial notes

References
Trengove S, Sherriff S, Bruce J (2021) Increasing reliability of lentil production on sandy soils. Proceedings GRDC Grains Research Update, Adelaide, February 2021, pp. 99-106.

Bute 2021

Sow date Between 26 May and 4 June 2021
Harvest date Unknown
Plot size Not specified
Plot replication 3
Herbicide

Please see attached report for herbicide methods and results. 

Other trial notes

References
Trengove S, Sherriff S, Bruce J (2021) Increasing reliability of lentil production on sandy soils. Proceedings GRDC Grains Research Update, Adelaide, February 2021, pp. 99-106.

Download the trial report to view additional method/treatment information
Trial source data and summary not available
Check the trial report PDF for trial results.
Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Alford, SA Not specified
Bute, SA Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Alford, SA
Bute, SA Calcarosol
National soil grid Source: CSIRO/TERN
NOTE: National Soil Grid data is aggregated information for background information on the wider area
Actual soil values can vary significantly in a small area and the trial soil tests are the most relevant data where available

Soil properties

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Climate

Derived climate information

No observed climate data available for this trial.
Derived climate data is determined from trial site location and national weather sources.

Alford SA

Bute SA

Alford SA

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Bute SA

NOTE: Exact trial site locality unknown - Climate data may not be accurate
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Some data on this site is sourced from the Bureau of Meteorology

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.



Trial last modified: 05-01-2023 09:45am AEST