Interaction between fungicide program and in-crop nitrogen timing for the control of yellow leaf spot (YLS) in early-sown wheat


Research organisatons
Funding source

Trial details

Researcher(s) Nick Poole (FAR Australia)
Michael Straight (FAR Australia)
Year(s) 2014
Contributor Riverine Plains
Trial location(s) Coreen, NSW
Interaction between fungicide program and in-crop nitrogen timing for the control of yellow leaf spot (YLS) in early-sown wheat locations

To examine the influence of two nitrogen timings: 40kg N/ha applied at tillering (GS22) or first node (GS31) and four fungicide strategies on levels of yellow leaf spot (YLS).

Key messages
  • Positive yield responses from the control of yellow leaf spot (YLS) were recorded despite disease levels not exceeding 10% on the top three leaves in this wheat-on-wheat rotation position.
  • For the second year in succession there was a significant yield increase (0.12t/ha mean of two fungicide products) from two fungicide applications made at the late tillering stage and the second node stage (GS25 and GS32).
  • The yield response from two fungicides corresponded to significantly better disease control than the untreated control and increased the crop canopy greeness.
  • Although single fungicide timings produced little or no evidence of YLS control, significant yield increases were measure (0.13-0.14t/ha).
  • Nitrogen timing (application of 40kg N/ha at either tillering (GS22) or first node stage (GS31)) had no significant effects on disease levels, yield or quality.
Lead research organisation Commonwealth Scientific and Industrial Research Organisation
Host research organisation N/A
Trial funding source GRDC
Related program Maintaining profitable farming systems with retained stubble

Thanks to farmer co-operators, Tomlinson Ag at Redlands, NSW.

Other trial partners Not specified
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Crop type Cereal (Grain): Wheat
Treatment type(s)
  • Fertiliser: Timing
  • Fungicide: Timing
  • Fungicide: Type
Trial type Experimental
Trial design Blocked

Coreen 2014

Sow date 28 April 2014
Harvest date Not specified
Plot size Not specified
Plot replication Not specified

host farmer paddock management


host farmer paddock management


host farmer paddock management

Other trial notes

GSR (Apr-Oct)

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Download results

Trial results Table 1

# Treatment 1
Treatment 2
Treatment 3
Protein (%) Grain yield (t/ha) Hectolitre weight (kg/hL) Screenings (%)
1 Untreated Nil fungicide N @ Z22 11.9 2.59 75.1 2.4
2 Untreated Nil fungicide N @ Z31 12.6 2.57 77.9 5.4
3 Prosaro Fungicide @ Z25 N @ Z22 12.3 2.78 77.4 6.8
4 Prosaro Fungicide @ Z25 N @ Z31 12.7 2.71 76.6 5.6
5 Prosaro Fungicide @ Z32 N @ Z22 12.4 2.73 78 5.8
6 Prosaro Fungicide @ Z32 N @ Z31 12 2.72 77.6 5.6
7 Prosaro Fungicide @ Z32 and Z25 N @ Z22 11.8 2.84 77.8 6.2
8 Prosaro Fungicide @ Z32 and Z25 N @ Z31 12.2 2.95 77.9 5.7
9 Untreated# Nil fungicide N @ Z22 12.3 2.58 77.4 5.9
10 Untreated# Nil fungicide N @ Z31 11.4 2.59 77.5 6
11 Tilt Fungicide @ Z25 N @ Z22 11.1 2.7 77.7 6.7
12 Tilt Fungicide @ Z25 N @ Z31 11.4 2.69 78 4.3
13 Tilt Fungicide @ Z32 N @ Z22 10.7 2.68 77.7 5.9
14 Tilt Fungicide @ Z32 N @ Z31 11.8 2.7 79.1 4.6
15 Tilt Fungicide @ Z32 and Z25 N @ Z22 11.7 2.77 77.4 5.3
16 Tilt Fungicide @ Z32 and Z25 N @ Z31 12 2.7 78.4 4.7
17 77.9 5.5

Grain yield t/ha


Hectolitre weight kg/hL


Protein %


Screenings %

Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Coreen, NSW Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Coreen, NSW 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 Coreen NSW
2014 217.9mm
2013 225.9mm
2012 285.1mm
2011 307.7mm
2010 349.4mm
2009 338.8mm
2008 317.6mm
2007 277.2mm
2006 321.7mm
2005 362.2mm
2004 363.1mm
2003 443.7mm
2002 442.3mm
2001 483.8mm
2000 509.9mm
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



Coreen NSW 2014

Observed climate information

Rainfall trial gsr (mm) 382.3mm

Derived climate information

Coreen NSW


Some data on this site is sourced from the Bureau of Meteorology

SILO weather estimates sourced from
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

2014 trial report

Trial last modified: 29-08-2019 15:08pm AEST