Septoria Tritici Blotch (STB) Control in Wheat

2017
CC BY 4.0

Research organisaton

Trial details

Researcher(s) Katherine Fuhrmann (FAR Australia)
Nick Poole (FAR Australia)
Tracey Wylie (FAR Australia)
Contact email nick.poole@faraustralia.com.au; tracey.wylie@faraustralia.com.au
Year(s) 2017
Contributor MacKillop Farm Management Group
Trial location(s) Conmurra, SA
Septoria Tritici Blotch (STB) Control in Wheat locations
Aims

To examine aspects of disease control in wheat.

Key messages

 • Reduced sensitivity of the Septoria tritici blotch (STB) pathogen Zymoseptoria tritici to triazole fungicides is likely to be an increasing problem, following the discovery of more resistant biotypes (R8 strain or Isoform 11) on the mainland in 2016.
• The presence of this strain and its proportion in the population will influence disease management strategies differentially.
• In Tasmania, early season disease control in the field with flutriafol (2017 trials) and tebuconazole (2016 trials) has been reduced by the more resistant biotypes of the pathogen, whilst on the mainland trial sites the activity of flutriafol appears to have been maintained in 2017 for the control of STB.
• The performance of a new SDHI based seed treatment and to a lesser extent fluquinconazole (Jockey) has been better than flutriafol in Tasmanian trials.
• Triazole/strobilurin mixtures based on epoxiconazole and azoxystrobin (e.g. Radial, Tazer Xpert), along with new as yet unregistered combinations of triazole & SDHI have given excellent control of STB.
• In 2016 the advantage of these products was evident in disease control and yield response in wheat but in 2017 the yield response to these products was similar to that observed with Opus and Prosaro (registered in wheat but not registered for STB control).
• Single spray timings of foliar fungicide for control of STB made during the tillering phase gave less effective disease control than applications made between GS31 – GS39.
• The most effective control of STB on a canopy leaf layer is achieved by applying fungicide to that leaf shortly after it has fully emerged but before infection becomes established.
• Where more than one fungicide is used in wheat avoid using the same triazole active ingredient twice in a season, irrespective of diseases to be controlled. If it is not possible ensure it is mixed with another mode of action (strobilurin) at one of the timings.
• Since strobilurins are at higher risk of resistance avoid using products containing these active ingredients more than once in a season.

Lead research organisation N/A
Host research organisation N/A
Related program N/A
Acknowledgments

• We would also like to acknowledge the work of our co-workers and collaborators in these projects.
• For the STB research project FAR 00004 - Amanda Pearce and her colleagues in SARDI, Charlie Crozier at Mackillop Farm Management Group, Jon Midwood and his colleagues at Southern Farming Systems in Victoria and Tasmania. Dr Andrew Milgate and his team at NSW DPI in Wagga for analysis of the pathogen population at different research sites. Dr Fran Lopez Ruiz and his team at
the Centre for Crop and Disease Management (CCDM) covering new actives research under Programme 9 of the GRDC/Curtin University bilateral.


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

Method

Crop type Cereal (Grain): Wheat
Treatment type(s)
  • Pest Management
Trial type Experimental
Trial design Randomised,Replicated,Blocked

Conmurra 2017

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
Conmurra, SA Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Conmurra, SA Sodosol
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 Conmurra SA
2017 239.0mm
2016 195.3mm
2015 191.8mm
2014 224.9mm
2013 195.9mm
2012 228.7mm
2011 274.1mm
2010 257.3mm
2009 224.1mm
2008 209.9mm
2007 248.1mm
2006 254.8mm
2005 268.9mm
2004 313.3mm
2003 361.2mm
2002 392.1mm
2001 505.7mm
2000 591.0mm
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.

Conmurra SA

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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 report and links

2017 trial report



Trial last modified: 23-11-2021 13:50pm AEST