Yellow leaf spot: worth the worry?

2012

Research organisation
Funding source

Trial details

Researcher(s) Dannielle McMillan (BCG)
Year(s) 2012
Contributor Birchip Cropping Group
Trial location(s) Birchip, VIC
Yellow leaf spot: worth the worry? locations
Aims

The project objectives were to: determine what effect stubble load and type had on YLS infection. Determine whether changing cultural practices would aid in reducing YLS incidence. Investigate the effect of fungicide application timing and nutrition on YLS severity.

Key messages

The best strategy against yellow leaf spot is to avoid sowing susceptible varieties in a wheat-on-wheat situation. The effectiveness of foliar fungicides for the control of yellow leaf spot is often variable; appropriate timing is crucial. In a low rainfall environment, it is rare to achieve an economic response when applying fungicides to control yellow leaf spot. Under the right seasonal conditions, YLS can reduce yields by between 5-10%.

Lead research organisation N/A
Host research organisation N/A
Trial funding source Mallee CMA
Related program N/A
Acknowledgments

This trial was funded by Mallee CMA, and DPI conducted disease assessments.


Other trial partners Not specified

Method

Crop type Cereal (Grain): Wheat
Treatment type(s)
  • Fertiliser : Type
  • Fungicide : Timing
  • Stubble : Management
Trial type Experimental
Trial design Replicated

Birchip 2012

Sow date 30 May 2012
Harvest date Not specified
Plot size Not specified
Plot replication 4
Fertiliser

30 May - 50kg/ha Granulock supreme Z (N 11%, P 21.8%, S 4%, Zn 1%) 8 Aug - 90 kg/ha urea (46% N)

Herbicide

30 May Roundup Attack� (2 L/ha) + TriflurX� (1.5 L/ha)

Download results

Trial results Table 1

# Treatment 1
Treatment 2
Treatment 3
Protein (%) Grain yield (t/ha) Disease severity (% leaf area affected) Gross margin ($/ha)
1 Stubble burnt 11.7 2.6 16.3
2 Stubble retained + fungicides 11.82 2.4 17.5
3 Stubble retained (control) 10.62 2.6 18.8
4 Stubble slashed 10.88 2.5 21.3
5 Stubble incorporated 11.12 2.2 17.5
6 Nil Nutritional Treaments 9.5 2.3 579
7 UAN+ Foliar Zinc 10.1 2.3 539
8 Foliar Zinc 10.1 2.2 545
9 UAN 10.6 2.3 600
10 Non-Infected Stubble (barley) 2.6 13.1
11 Barley and wheat stubble 2.5 17.5
12 Infected stubble (wheat) 2.5 19.4

Grain yield t/ha


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Disease severity % leaf area affected


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Gross margin $/ha


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Protein %


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Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Birchip, VIC Clay loam
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Birchip, VIC Vertosol
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 Birchip VIC
2012
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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.

Birchip VIC

CAUTION: Trial site locality unknown; Climate data sourced from Birchip Cropping Group office location
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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


No trial reports or attachments found


Trial last modified: 16-07-2019 13:23pm AEST