Canola – will I get an economic response from applying a fungicide?

2020
CC BY 4.0

Research organisation
Funding source

Trial details

Researcher(s) Andrea Hills
Kurt Lindbeck
Steve Marcroft
Nick Perndt
Susie Sprague
Angela Van de Wouw
Andrew Ware
Andrew Wherrett
Year(s) 2020
Contributor Hart Field Site Group
Trial location(s) Hart, SA
Further information View external link
Canola – will I get an economic response from applying a fungicide? locations
Aims

To understand:

  • Will I get an economic return from applying a fungicide to my canola crop? 
  • Do I need a seed treatment and/or fungicide amended fertiliser?
  • Do I need a vegetative foliar fungicide application? 
  • Upper canopy blackleg fungicide application? 
  • Should I apply a fungicide for UCI protection? 
  • What are the steps to determining a UCI spray decision? 
  • How can I determine if I should have sprayed for UCI?
Key messages

• The canola industry is now more reliant on fungicides, in some regions there is less emphasis on cultural practices to minimise disease.
• The decision to use a fungicide is not clear cut. You must first understand the disease risk profile of your crop.
• Fungicide decisions at seeding time need to be made prior to sowing and therefore prior to any disease scouting.
• Blackleg crown canker results from infection during early seedling growth. Prior to sowing, use the BlacklegCM decision support tool to identify high risk paddocks and explore management strategies to reduce yield loss.
• Early vegetative (4-10 leaf) foliar fungicide application should be based on the risk profile of your crop, after scouting for leaf lesions and the potential yield of the crop.
• Fungicide application for upper canopy infection is separate to the decision-making process for crown canker. Upper canopy infection fungicide application can result in very variable yield returns. You must understand your risk before applying a
fungicide.
• Our knowledge on upper canopy infection (UCI) is improving and it is likely that decision making will become more reliable. A UCI App is expected to be released via GRDC investment when we have enough confidence on recommendations to aid decision making.

Lead research organisation N/A
Host research organisation N/A
Trial funding source GRDC CSP00187,MGP1905-001SAX,UM00051,UOM1904-004RTX
Related program N/A
Acknowledgments

The research undertaken as part of this project is made possible by the significant contributions of growers through both trial cooperation and the support of the GRDC, the author would like to thank them for their continued support.
The authors also thank Elizabeth Sheedy, Alistair Smith and Buffy Harrison.
GRDC project codes: UOM1904-004RTX, UM00051, CSP00187, MGP1905-001SAX


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

Method

Crop type Oilseed: Canola
Treatment type(s)
  • Pest Management : Fungal
Trial type Article/commentary
Trial design Not applicable

Hart 2020

Sow date Not applicable
Harvest date Not applicable
Plot size Not specified
Plot replication Not specified
Download the trial report to view additional method/treatment information
Trial source data and summary not available
Check the trial report PDF for trial results.
Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Hart, SA Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Hart, SA Chromosol

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.

Hart SA

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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

2020 trial report



Trial last modified: 29-07-2026 11:11am AEST