Are early fungicide applications effective for yellow spot and Stagonospora nodorum in the low rainfall zone?

2012

Research organisatons
Funding source

Trial details

Researcher(s) Ciara Beard (DAFWA)
Year(s) 2012
Contributor North East Farming Futures
Trial location(s) East Nabawa, WA
Mullewa, WA
Are early fungicide applications effective for yellow spot and Stagonospora nodorum in the low rainfall zone? locations
Aims

To assess the efficacy of foliar fungicide application prior to stem extension for control of yellow spot or stagonospora nodorum in wheat in low rainfall zones.

Key messages
  • In 2012, early fungicide application at Z22 did significantly reduce leaf spot disease levels at two out of three low rainfall sites in the northern agricultural region.
  • Most effective disease control was provided by a double spray strategy (early tillering spray plus an application at flag leaf, Z39) or a single high rate fungicide application at Z39, as they performed equally well.
  • However, disease levels were only high at one site (east Nabawa), and the very dry spring meant none of the sites responded yieldwise to the fungicide application, although there were some grain quality benefits.
  • So in 2012 fungicide application was not profitable at any of these low rainfall sites.
Lead research organisation N/A
Host research organisation Yuna Farm Improvement Group
Trial funding source GRDC DAW 00210
Related program N/A
Acknowledgments

Thanks to Roland Labuschegne, Andrew Messina, and Shaun Earle and families for hosting the trials; DAFWA Research Support Unit staff for
harvesting the trials; GRDC for co-funding the trials (DAW 00210).


Other trial partners North East Farming Futures
Download the trial report to view additional trial information

Method

Crop type Wheat
Treatment type(s)
  • Fungicide: Rate
  • Fungicide: Timing
Trial type Experimental
Trial design Randomised,Replicated,Blocked

East Nabawa 2012

Sow rate or Target density Not specified
Sow date Not specified
Harvest date Not specified
Plot size Not specified
Plot replication Not specified
Fertiliser Not specified
Herbicide Not specified
Fungicide Not specified

Mullewa 2012

Sow rate or Target density 80kg/ha
Sow date 12 May 2020
Harvest date Not specified
Plot size 20m x 5m
Plot replication 4
Fertiliser

Agstar Xtra @ 50 kg/ha at seeding, Urea @ 30 kg/ha down boot

Herbicide

Velocity 670 mL in July, LV680 @ 800 mL in Early August

Fungicide

As per treatment list

Download the trial report to view additional method/treatment information

Download results

Trial results Table 1

@T1: Z26 @T2: Z39 @T3: Z65
# Variety
Treatment 1
Treatment 2
Grain yield (t/ha) Disease severity (% leaf area affected) Disease severity (% leaf area affected) Disease severity (% leaf area affected)
1 Mace Untreated Untreated 1 5 9 9
1 Mace Prosaro at 150ml/ha Z22 1.1 3 5 1
1 Mace Prosaro at 300ml/ha Z39 1.1 5 8 8
1 Mace Prosaro at 150ml/ha Z22 + Z39 1.1 3 5 5
2 Mace
2 Mace
2 Mace
2 Mace
3 Mace
3 Mace
3 Mace
3 Mace
4 Mace
4 Mace
4 Mace
4 Mace

Grain yield t/ha


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Disease severity % leaf area affected


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Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
East Nabawa, WA Not specified
Mullewa, WA Yellow sandplain
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
East Nabawa, WA Kandosol
Mullewa, WA 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 East Nabawa WA Mullewa WA
2012 56.8mm177.8mm
2011 101.3mm256.7mm
2010 55.0mm176.4mm
2009 70.2mm191.0mm
2008 88.7mm227.2mm
2007 66.8mm166.1mm
2006 61.8mm183.2mm
2005 58.6mm204.0mm
2004 57.3mm188.2mm
2003 54.8mm182.7mm
2002 54.1mm176.6mm
2001 41.3mm170.8mm
2000 89.6mm213.1mm
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

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Climate

Mullewa WA 2012


Observed climate information

Rainfall trial gsr (mm) 125mm

Derived climate information

East Nabawa WA

Mullewa WA

East Nabawa WA

NOTE: Exact trial site locality unknown - Climate data may not be accurate
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Mullewa WA

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: 25-06-2019 12:21pm AEST