Canola blackleg spore shower risk forecast for Western Australia – 17 Apr 2023

Page last updated: Monday, 17 April 2023 - 11:49am

Please note: This content may be out of date and is currently under review.

The DPIRD blackleg forecast model predicts the dates of spore maturation on canola stubble. Spore showers will commence soon after the spores are mature in the fruiting bodies. The model then predicts the risk of matching spore release with the seedling susceptible stage of the crop (4 – 6 leaf stage). The current forecast is based on weather data (1st January to 17th April 2023) from the nearest weather station. Projections assume four millimetres (mm) of rainfall per week from now until the end of the year.

Spore shower risk forecast map

Spore shower risk forecast map 17 April 2023
Map showing the relative current risk of spores coinciding with the seedling stage based upon Blackleg Sporacle Model outputs for various locations in Western Australia, 17th April 2023.

If you are using the BlacklegCM decision support tool you can manually enter the blackleg risk levels that relate to your sowing date and location into the app under the “Crop Circumstances – Spore maturity risk” section. If you would like a location to be added to this forecast page please email CropDiseaseTools@dpird.wa.gov.au.

Risk tables

The following table shows (districts of Western Australia listed in an alphabetical order) risk of blackleg spore showers coinciding with the seedling susceptible stage relative to the sowing date.

Badgingarra

Forecast for crops sown on

3 Apr

10 Apr

17 Apr

Blackleg risk

Low

Low

Moderate

Bolgart

Forecast for crops sown on

3 Apr

10 Apr

17 Apr

Blackleg risk

Low

Low

Moderate

Corrigin

Forecast for crops sown on

3 Apr

10 Apr

17 Apr

Blackleg risk

Moderate

High

High

Darkan

Forecast for crops sown on

3 Apr

10 Apr

17 Apr

Blackleg risk

Moderate

High

High

Eradu

Forecast for crops sown on

3 Apr

10 Apr

17 Apr

Blackleg risk

Low

Low

Moderate

Esperance

Forecast for crops sown on

3 Apr

10 Apr

17 Apr

Blackleg risk

Moderate

High

High

Gibson

Forecast for crops sown on

3 Apr

10 Apr

17 Apr

Blackleg risk

High

High

High

Jerramungup

Forecast for crops sown on

3 Apr

10 Apr

17 Apr

Blackleg risk

Moderate

High

High

Kalannie

Forecast for crops sown on

3 Apr

10 Apr

17 Apr

Blackleg risk

Low

Low

Moderate

Katanning

Forecast for crops sown on

3 Apr

10 Apr

17 Apr

Blackleg risk

High

High

High

Kendenup

Forecast for crops sown on

3 Apr

10 Apr

17 Apr

Blackleg risk

Moderate

Moderate

High

Kojonup

Forecast for crops sown on

3 Apr

10 Apr

17 Apr

Blackleg risk

Low

Low

Moderate

Kulin

Forecast for crops sown on

3 Apr

10 Apr

17 Apr

Blackleg risk

Moderate

Moderate

High

Lake Grace

Forecast for crops sown on

3 Apr

10 Apr

17 Apr

Blackleg risk

Moderate

Moderate

High

Lake King

Forecast for crops sown on

3 Apr

10 Apr

17 Apr

Blackleg risk

Moderate

Moderate

High

Merredin

Forecast for crops sown on

3 Apr

10 Apr

17 Apr

Blackleg risk

Low

Moderate

Moderate

Mingenew

Forecast for crops sown on

3 Apr

10 Apr

17 Apr

Blackleg risk

Low

Low

Low

Moora

Forecast for crops sown on

3 Apr

10 Apr

17 Apr

Blackleg risk

Low

Low

Moderate

Mount Barker

Forecast for crops sown on

3 Apr

10 Apr

17 Apr

Blackleg risk

High

High

High

Mullewa

Forecast for crops sown on

3 Apr

10 Apr

17 Apr

Blackleg risk

Low

Low

Low

Munglinup

Forecast for crops sown on

3 Apr

10 Apr

17 Apr

Blackleg risk

Moderate

High

High

Narrogin

Forecast for crops sown on

3 Apr

10 Apr

17 Apr

Blackleg risk

Moderate

Moderate

High

Northam

Forecast for crops sown on

3 Apr

10 Apr

17 Apr

Blackleg risk

Low

Moderate

Moderate

Northampton

Forecast for crops sown on

3 Apr

10 Apr

17 Apr

Blackleg risk

Low

Low

Low

Salmon Gums

Forecast for crops sown on

3 Apr

10 Apr

17 Apr

Blackleg risk

Moderate

Moderate

High

Scaddan

Forecast for crops sown on

3 Apr

10 Apr

17 Apr

Blackleg risk

Moderate

Moderate

High

South Stirling

Forecast for crops sown on

3 Apr

10 Apr

17 Apr

Blackleg risk

High

High

High

Tammin

Forecast for crops sown on

3 Apr

10 Apr

17 Apr

Blackleg risk

Low

Moderate

Moderate

Three Springs

Forecast for crops sown on

3 Apr

10 Apr

17 Apr

Blackleg risk

Low

Low

Low

Wagin

Forecast for crops sown on

3 Apr

10 Apr

17 Apr

Blackleg risk

Moderate

High

High

Williams

Forecast for crops sown on

3 Apr

10 Apr

17 Apr

Blackleg risk

High

High

High

Wongan Hills

Forecast for crops sown on

3 Apr

10 Apr

17 Apr

Blackleg risk

Low

Moderate

Moderate

York

Forecast for crops sown on

3 Apr

10 Apr

17 Apr

Blackleg risk

Low

Moderate

Moderate

Key to blackleg risk management for your district

Blackleg spore shower risk

Suggestions

Low

Consider applying seed dressing if varieties below MR-MS are sown

Medium

Consider applying recommended fungicide if varieties below MR are sown

High

Consider applying recommended fungicide if varieties below MR-R are sown

In high disease pressure situations seed dressing alone may not be sufficient in providing adequate protection from disease. In this scenario consider applying additional protection either using fertiliser based fungicide or foliar fungicide application. Consider applying foliar fungicide if none of the upfront (seed or fertiliser based) fungicide is applied.

More information

For more information refer to Australian Canola Variety Ratings 2023 Autumn Fact Sheet Blackleg Management Guide, produced by Grains Research and Development Corporation (GRDC).

Topics

Canola blackleg spore shower risk forecast for Western Australia – 17 Apr 2023

  1. Spore shower risk forecast map
  2. Risk tables
    1. Badgingarra
    2. Bolgart
    3. Corrigin
    4. Darkan
    5. Eradu
    6. Esperance
    7. Gibson
    8. Jerramungup
    9. Kalannie
    10. Katanning
    11. Kendenup
    12. Kojonup
    13. Kulin
    14. Lake Grace
    15. Lake King
    16. Merredin
    17. Mingenew
    18. Moora
    19. Mount Barker
    20. Mullewa
    21. Munglinup
    22. Narrogin
    23. Northam
    24. Northampton
    25. Salmon Gums
    26. Scaddan
    27. South Stirling
    28. Tammin
    29. Three Springs
    30. Wagin
    31. Williams
    32. Wongan Hills
    33. York
  3. Key to blackleg risk management for your district
  4. More information
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Authors

Adam Sparks
Janette Pratt

Funding bodies