Yellow leaf spot control with foliar fungicides in second wheat under full stubble retention

2013

Research organisatons
Funding source

Trial details

Researcher(s) Nick Poole and Tracey Wylie (FAR Australia)
Year(s) 2013
Contributor Riverine Plains
Trial location(s) Site 3, Yarrawonga, VIC
Yellow leaf spot control with foliar fungicides in second wheat under full stubble retention locations
Aims

To evaluate the the value of foliar fungicide sprays for the control of yellow leaf spot in wheat established in the stubble of the previous wheat crop under no till.

Key messages
  • Fungicide applied at third node (GS33) gave significantly better yellow leaf spot (YLF) control and green leaf retention (GLR) than a tillering (GS23) application.
  • The improvement in disease control with a single spray timing did not lead to a significant yield increase.
  • There was a significatn yield advantage (0.27t/ha) when both spray timings were sequenced in a two-spray programme despite the low yield of the trial.
  • The value of hte extra grain produced from two sprays was $69/ha, which covered the costs of the fungicides and their application.
  • The net margin was great with Tilt than Prosaro largely as a result of Prosaro being a more expensive product.
  • The best YLS control achieved with a foliar fungicide on the top three leaves was 65% control.
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

Thanks to the farmer co-operator, Telewonga Pty Ltd for spraying the treatments in this trial.


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

Method

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

Yarrawonga 2013

Sow date 15 April 2013
Harvest date Not specified
Plot size 18m x 3m
Plot replication 4
Fertiliser

75kg/ha MAP, 210kg urea throughout the season

Herbicide

host farmer paddock management

Insecticide

host farmer paddock management

Fungicide

host farmer paddock management

Yarrawonga 2013

Sow date 15 April 2013
Harvest date Not specified
Plot size 18m x 3m
Plot replication 4
Fertiliser

75kg/ha MAP, 210kg urea throughout the season

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 timing on YLS severity at Yarrawonga 2013

# Treatment 1
Flag leaf area affected by yellow spot (%) F-1 leaf area affected by yellow spot (%)
1 Nil 3.4 11.8
2 Z23 2.4 8.6
3 Z33 1.8 4.1
4 Z23 fb Z33 1.2 3.1

F-1 leaf area affected by yellow spot %


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Flag leaf area affected by yellow spot %


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Trial results Effect of fungicide type on YLS severity at Yarrawonga 2013

@T1: @T2:
# Flag leaf area affected by yellow spot (%) F-1 leaf area affected by yellow spot (%) F-1 leaf area affected by yellow spot (%)
1 Prosaro 1.5 0.6 4.2
1 Tilt 2.1 0.6 6.4
1
2
2
2

F-1 leaf area affected by yellow spot %


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Flag leaf area affected by yellow spot %


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Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Site 3, Yarrawonga, VIC Not specified
Derived trial site soil information
Australian Soil Classification Source
Trial site Soil order
Site 3, Yarrawonga, VIC 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 3, Yarrawonga VIC 2013


Observed climate information

Rainfall trial gsr (mm) 222mm

Site 3, Yarrawonga VIC 2013


Observed climate information

Rainfall trial gsr (mm) 222mm

Derived climate information

Site 3, Yarrawonga VIC

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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: 03-09-2019 09:39am AEST