Lentil, Yield loss from virulent forms of Ascochyta lentis, MRZ Yorke Peninsula (Maitland), South Australia

2019
CC BY 4.0

Research organisaton
Funding source

Trial details

Researcher(s) Jenny Davidson
Sarah Day
Penny Roberts
Year(s) 2019
Contributor Southern Pulse Agronomy
Trial location(s) Maitland, NSW
Lentil, Yield loss from virulent forms of Ascochyta lentis, MRZ Yorke Peninsula (Maitland), South Australia locations
Aims

To identify potential yield loss from the isolates of Ascochyta lentis in PBA Hurricane XT.

Key messages

None of the lentil varieties developed ascochyta blight due to the dry conditions during the season. Only few isolated lesions were developed in PBA Hurricane XT.

Maitland NSW 2019

Ascochyta blight of lentil, caused by the fungal pathogen Ascochyta lentis, is common in lentil growing in South Australia. Infection start from infected seeds or ascospores that are blown from infected stubble during winter. Further, conidia are rain-splashed from the infected stubble and diseased plants. The national Lentil Breeding program has developed several commercial varieties that are resistance to this disease. However, the resistance in varieties, Nipper and PBA Hurricane XT were lost within three years after their commercial release due to the high variability of the pathogen population. This is particularly true for Yorke Peninsula where lentil crops are grown in close rotation producing high selection pressure for virulent forms of the pathogen. In seasons that are highly conducive to the disease up to 30% yield loss has been reported in PBA Flash, which is a moderately susceptible variety. Further, seed staining, which occur as a result of the disease decreases the market quality of the grain leading to more economic losses. The recommended practice is to apply foliar fungicides ahead of rain events starting from the vegetative stage, and especially during the onset of pod set and filling for moderately susceptible varieties such as PBA Flash. Therefore, the trial was conducted to quantify the yield losses caused by ascochyta blight in intermediate disease resistant (MRMS) variety, PBA Hurricane XT to develop more economically viable fungicide program.

Lead research organisation Southern Pulse Agronomy
Host research organisation N/A
Trial funding source GRDC DAV00150
Related program N/A
Acknowledgments

The research undertaken as part of the GRDC-funded Southern Pulse Agronomy project is made possible by the significant contributions of growers through both trial cooperation and the support of the GRDC and the authors would like to thank them for their continued support. The continued assistance in trial management from SARDI Agronomy groups at Clare, Minnipa, Struan and Port Lincoln is gratefully acknowledged and appreciated. The authors would also like to gratefully acknowledge SARDI Plant Pathology and Soil Biology groups for their scientific input and assistance, as well as advisors and grower groups involved in the project. 


Other trial partners Not specified
Download the trial report to view additional trial information

Method

Crop type Grain Legume: Lentils
Treatment type(s)
  • Pest Management: Fungal
Trial type Experimental
Trial design Unknown

Maitland 2019

Sow date 20 May 2019
Harvest date Unknown
Plot size Not specified
Plot replication Not specified
Fungicide

Treatment | Fungicide product | Active ingredient and concentration (g/l) | Time and rate of application (l/ha)

  • Nil | Fungicides not applied | NA | NA
  • Fortnightly Chlorothalonil | Chlorothalonil | Chlorothalonil (720) Fortnightly (2)
  • Chlorothalonil | Chlorothalonil | Chlorothalonil (720) | Pod set just before rains (2)
  • Veritas® | Adama Veritas® | Tebuconazole (200) + Azoxystrobin (120) | Pod set just before rains (1)
Inoculant Ascochyta lentis - Natural infection; paddock known to have virulent form present
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
Maitland, NSW Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Maitland, NSW Tenosol
Soil Moisture Source: BOM/ANU
Average amount of water stored in the soil profile during the year, estimated by the OzWALD model-data fusion system.
Year Maitland NSW
2019 216.8mm
2018 262.5mm
2017 274.9mm
2016 346.1mm
2015 343.5mm
2014 291.1mm
2013 331.5mm
2012 318.2mm
2011 333.2mm
2010 276.4mm
2009 299.7mm
2008 376.1mm
2007 331.6mm
2006 265.3mm
2005 314.1mm
2004 281.2mm
2003 273.9mm
2002 281.5mm
2001 295.0mm
2000 303.8mm
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.

Maitland NSW

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: 14-03-2023 10:42am AEST