Understanding the barley leaf rust pathogen is the key to its successful management

2016
CC BY 4.0

Research organisaton
Funding source

Trial details

Researcher(s) Kithsiri Jayasena (DAFWA)
Robert Park (Uni of Sydney)
Geoff Thomas (DAFWA)
Laurie Wahlsten (DAFWA)
Year(s) 2016
Contributor Stirlings to Coast Farmers
Trial location(s) Albany, WA
Understanding the barley leaf rust pathogen is the key to its successful management locations
Aims

To present research information available on role of foliar fungicide mixtures with new chemistry against barley LR in a variety with known APR.

Key messages
  • Barley leaf rust (LR) was observed on barley regrowth in the lower Great Southern and South Coast of WA in the summer/autumn of 2016. This contributed to the first observations of infected barley crops in the region in July 2016. All barley varieties including those with Adult Plant Resistance (APR) were under severe disease pressure and responded to application of fungicide.
  • The high levels of LR in 2016 and the possibility of barley regrowth in autumn 2017 means a significant LR risk for the 2017 season and fungicide programs for APR varieties should be considered.
  • LR is a social disease and all growers should be proactive in eliminating the volunteer barley green bridge. To minimise early onset of LR, the regrowth barley should be eliminated at least 4 weeks before seeding.
  • Star of Bethlehem (an alternate host) should be sprayed to eliminate the likelihood of new pathotype developing in the region.
  • Selecting varieties with adult plant resistance genes will reduce grain yield loss. However, performance of these varieties against LR is influenced by seasonal weather, time of disease onset, crop agronomy, and is hard to predict season to season. Depending on the LR pressure in the crop they may need early foliar fungicide intervention to reduce development of disease on plants during the growing season.
  • Oxford possess two partial resistance genes (Rph20 and Rph24), and under high LR pressure application of foliar fungicides increased yield up to 64 per cent.
Lead research organisation Stirlings to Coast Farmers
Host research organisation N/A
Trial funding source GRDC DAW00229
Related program N/A
Acknowledgments

The authors acknowledge the trial site provided by Mark and Robin Slattery and financial assistance from Grains Research and Development Corporation, DAW00229. Fungicides used in field testing were provided by Bayer, Syngenta, ADAMA and BASF.


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

Method

Crop type Cereal (Grain): Barley
Treatment type(s)
  • Pest Management: Fungal
Trial type Experimental
Trial design Replicated

Albany 2016

Sow date Not specified
Harvest date Not specified
Plot size Not specified
Plot replication Not specified
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
Albany, WA Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Albany, WA Podosol
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 Albany WA
2016 384.3mm
2015 337.4mm
2014 338.4mm
2013 371.5mm
2012 378.3mm
2011 383.4mm
2010 349.0mm
2009 386.3mm
2008 383.4mm
2007 364.8mm
2006 341.7mm
2005 373.8mm
2004 349.7mm
2003 361.4mm
2002 356.0mm
2001 350.2mm
2000 366.1mm
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

Loading

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.

Albany WA

Loading
Loading
Loading

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 report and links

2016 trial report



Trial last modified: 25-08-2021 16:54pm AEST