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

2015

Research organisatons
Funding source

Trial details

Researcher(s) Nick Poole and Michael Straight (FAR Australia)
Year(s) 2015
Contributor Riverine Plains
Trial location(s) Site 1, Coreen, NSW
Interaction between fungicide program and in-crop nitrogen timing for the control of yellow leaf spot (YLS) in early-sown wheat locations
Aims

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
  • The level of yellow leaf spot (YLS) control achieved with fungicides applied at tillering (GS22) and third node stage (GS31) in wheat-on-wheat was poor (less than 50% in most assessments).
  • Fungicide applied at the third node stage (GS33) was more effective at preventing YLS infection on the top three leaves of the crop than when applied at tillering (GS22).
  • Fungicide applied at the third node stage (GS33) generated a significant (0.44t/ha) yield increase over the untreated crop, whereas the equivalent fungicide applied at tillering (GS22) gave no yield benefit.
  • Applying fungicide at both tillering (GS22) and third node stage (GS33) offered no advantage over a single application at GS33.
  • Nitrogen application at tillering or first node had no effect on yield.
  • There was no significant difference in product performance between Tilt and Prosaro.
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
Acknowledgments N/A
Other trial partners Not specified
Download the trial report to view additional trial information

Method

Crop type Wheat
Treatment type(s)
  • Fertiliser: Timing
  • Fungicide: Timing
Trial type Experimental
Trial design Blocked

Coreen 2015

Sow date 12 May 2015
Harvest date Not specified
Plot size Not specified
Plot replication Not specified
Herbicide

host farmer paddock management

Insecticide

host farmer paddock management

Fungicide

host farmer paddock management

Coreen 2015

Sow date 12 May 2015
Harvest date Not specified
Plot size Not specified
Plot replication Not specified
Herbicide

host farmer paddock management

Insecticide

host farmer paddock management

Fungicide

host farmer paddock management

Coreen 2015

Sow date 12 May 2015
Harvest date Not specified
Plot size Not specified
Plot replication Not specified
Herbicide

host farmer paddock management

Insecticide

host farmer paddock management

Fungicide

host farmer paddock management

Coreen 2015

Sow date 12 May 2015
Harvest date Not specified
Plot size Not specified
Plot replication Not specified
Herbicide

host farmer paddock management

Insecticide

host farmer paddock management

Fungicide

host farmer paddock management

Download the trial report to view additional method/treatment information

Download results

Trial results Effect of fungicide and fertiliser type and timing on crop parameters at Coreen in 2015

# Treatment 1
Treatment 2
Treatment 3
Hectolitre weight (kg/hL) Screenings (%) Protein (%) Grain yield (t/ha)
1 Untreated Nil fungicide N @ Z22 82 3.4 11.4 3.63
2 Untreated Nil fungicide N @ Z31 81.8 3.2 11.3 3.34
3 Prosaro Fungicide @ Z25 N @ Z22 82.4 3.4 11.4 3.6
4 Prosaro Fungicide @ Z25 N @ Z31 82.4 3 11.3 3.48
5 Prosaro Fungicide @ Z32 N @ Z22 82.5 3.2 11.5 3.77
6 Prosaro Fungicide @ Z32 N @ Z31 81.8 3.4 11.9 4.06
7 Prosaro Fungicide @ Z32 and Z25 N @ Z22 80.8 3.6 11.9 3.77
8 Prosaro Fungicide @ Z32 and Z25 N @ Z31 80.1 2.8 11.8 3.53
9 Untreated# Nil fungicide N @ Z22 82.1 3.6 11.5 3.86
10 Untreated# Nil fungicide N @ Z31 82.2 3.1 11.3 3.45
11 Tilt Fungicide @ Z25 N @ Z22 82.3 3.5 11.3 3.73
12 Tilt Fungicide @ Z25 N @ Z31 81.8 3.1 11.4 3.69
13 Tilt Fungicide @ Z32 N @ Z22 82.2 3.2 11.2 4.07
14 Tilt Fungicide @ Z32 N @ Z31 82.3 3 11.6 3.97
15 Tilt Fungicide @ Z32 and Z25 N @ Z22 82 3.4 11.2 4.03
16 Tilt Fungicide @ Z32 and Z25 N @ Z31 82.1 2.9 11.8 3.62

Grain yield t/ha


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Hectolitre weight kg/hL


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Protein %


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Screenings %


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Trial results Effect of fungicide timing on crop parameters at Coreen in 2015

# F-1 leaf area affected by yellow spot (%) Hectolitre weight (kg/hL) Screenings (%) Protein (%) Grain yield (t/ha)
1 Untreated 1.6 82 3.3 11.4 3.57
2 Fungicide @ Z25 1.7 82.2 3.3 11.3 3.62
3 Fungicide @ Z32 1.3 82.2 3.2 11.6 3.97
4 Fungicide @ Z32 and Z25 1 81.3 3.2 11.7 3.74

Grain yield t/ha


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F-1 leaf area affected by yellow spot %


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Hectolitre weight kg/hL


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Protein %


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Screenings %


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Trial results Effect of fungicide type on crop parameters at Coreen in 2015

# F-1 leaf area affected by yellow spot (%) Hectolitre weight (kg/hL) Screenings (%) Protein (%) Grain yield (t/ha)
1 Prosaro 1.3 81.7 3.3 11.6 3.65
2 Tilt 1.5 82.1 3.2 11.4 3.8

Grain yield t/ha


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F-1 leaf area affected by yellow spot %


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Hectolitre weight kg/hL


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Protein %


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Screenings %


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Trial results Effect of fertiliser timing on crop parameters at Coreen in 2015

# F-1 leaf area affected by yellow spot (%) Hectolitre weight (kg/hL) Screenings (%) Protein (%) Grain yield (t/ha)
1 N @ Z22 1.3 82 3.4 11.4 3.81
2 N @ Z31 1.5 81.8 3.1 11.5 3.64

Grain yield t/ha


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F-1 leaf area affected by yellow spot %


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Hectolitre weight kg/hL


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Protein %


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Screenings %


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Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Site 1, Coreen, NSW Not specified
Derived trial site soil information
Australian Soil Classification Source
Trial site Soil order
Site 1, Coreen, NSW Sodosol
National soil grid Source
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

Site 1, Coreen NSW 2015


Observed climate information

Rainfall trial gsr (mm) 329mm

Site 1, Coreen NSW 2015


Observed climate information

Rainfall trial gsr (mm) 329mm

Site 1, Coreen NSW 2015


Observed climate information

Rainfall trial gsr (mm) 329mm

Site 1, Coreen NSW 2015


Observed climate information

Rainfall trial gsr (mm) 329mm

Derived climate information

Site 1, Coreen NSW

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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: 29-08-2019 14:56pm AEST