Field pea blackspot management guide for South Australia - 5 June 2018

Field Pea Blackspot Management Guide is a location and season specific weekly forecast. It accounts for varietal resistance and chemical options, agronomic yield potentials, agronomic constraints (frost and terminal drought), risks of spores showers, disease severity, and disease related yield loss. It then weighs agronomic yield loss and disease yield loss and suggests a window of sowing dates. Field pea crops should be sown so that the majority of blackspot spores (approximately 60%) have been released prior to the crop emergence.

This prediction is based on DPIRD's Blackspot Manager model using weather data from 1 January 2018 to 4 June 2018 from the nearest weather station.

Key to blackspot severity scores

Table 1 Percentage yield loss (in years) for different levels of blackspot risk scenarios
Blackspot risk Five out of 10 years Three out of 10 years One out of 10 years
Low 2 5 15
Medium 20 25 35
High 25 30 50

Balaklava

Rainfall to date: 59.6mm. Days with significant stubble moisture: 40

Weekly forecast 4 June 11 June 18 June
Blackspot severity 3-4 3-4 3-4
Sowing guide (based on agronomic suitability) Do not sow as risk is medium Do not sow as risk is medium Do not sow as risk is medium
Blackspot risk Medium Medium Medium

Blyth (Hart)

Rainfall to date: 84.2mm. Days with significant stubble moisture: 59

Weekly forecast 4 June 11 June 18 June
Blackspot severity 2 1 1
Sowing guide (based on agronomic suitability) Okay to sow Okay to sow Okay to sow
Blackspot risk Low Low Low

Bordertown

Rainfall to date: 83mm. Days with significant stubble moisture: 49

Weekly forecast 4 June 11 June 18 June
Blackspot severity 3-4 2 2
Sowing guide (based on agronomic suitability) Do not sow as risk is medium Do not sow as risk is medium Okay to sow
Blackspot risk Medium Low Low

Bute

Rainfall to date: 95.6mm. Days with significant stubble moisture: 60

Weekly forecast 4 June 11 June 18 June
Blackspot severity 2 1 1
Sowing guide (based on agronomic suitability) Okay to sow Okay to sow Okay to sow
Blackspot risk Low Low Low

Clare

Rainfall to date: 117.5mm. Days with significant stubble moisture: 71

Weekly forecast 4 June 11 June 18 June
Blackspot severity 1 1 1
Sowing guide (based on agronomic suitability) Okay to sow Okay to sow Okay to sow
Blackspot risk Low Low Low

Crystal Brook

Rainfall to date: 53mm. Days with significant stubble moisture: 30

Weekly forecast 4 June 11 June 18 June
Blackspot severity 5 5 3-4
Sowing guide (based on agronomic suitability) Do not sow as risk is high Do not sow as risk is high Do not sow as risk is medium
Blackspot risk High High Medium

Eudunda

Rainfall to date: 80.3mm. Days with significant stubble moisture: 61

Weekly forecast 4 June 11 June 18 June
Blackspot severity 2 1 1
Sowing guide (based on agronomic suitability) Okay to sow Okay to sow Okay to sow
Blackspot risk Low Low Low

Farrell Flat

Rainfall to date: 85.7mm
Days with significant stubble moisture: 48

Weekly forecast 4 June 11 June 18 June
Blackspot severity 3-4 2 2
Sowing guide (based on agronomic suitability) Do not sow as risk is medium Okay to sow Okay to sow
Blackspot risk Medium Low Low

Keith

Rainfall to date: 85.5mm. Days with significant stubble moisture: 41

Weekly forecast 4 June 11 June 18 June
Blackspot severity 3-4 3-4 2
Sowing guide (based on agronomic suitability) Do not sow as risk is medium Do not sow as risk is medium Sow
Blackspot risk Medium Medium Low

Kimba

Rainfall to date: 52.6mm. Days with significant stubble moisture: 28

Weekly forecast 4 June 11 June 18 June
Blackspot severity 5 5 3-4
Sowing guide (based on agronomic suitability) Do not sow as risk is high Do not sow as risk is high Medium
Blackspot risk High High Medium

Kingsford

Rainfall to date: 85.1mm. Days with significant stubble moisture: 70

Weekly forecast 4 June 11 June 18 June
Blackspot severity 1 1 1
Sowing guide (based on agronomic suitability) Okay to sow Okay to sow Okay to sow
Blackspot risk Low Low Low

Kyancutta

Rainfall to date: 52.5mm. Days with significant stubble moisture: 33

Weekly forecast 4 June 11 June 18 June
Blackspot severity 5 3-4 3-4
Sowing guide (based on agronomic suitability) Do not sow as risk is high Do not sow as risk is medium Do not sow as risk is medium
Blackspot risk High Medium Medium

Lameroo

Rainfall to date: 43.1mm. Days with significant stubble moisture: 28

Weekly forecast 4 June 11 June 18 June
Blackspot severity 5 5 5
Sowing guide (based on agronomic suitability) Do not sow as risk is high Do not sow as risk is high Do not sow as risk is high
Blackspot risk High High High

Lock

Rainfall to date: 64mm. Days with significant stubble moisture: 41

Weekly forecast 4 June 11 June 18 June
Blackspot severity 3-4 3-4 2
Sowing guide (based on agronomic suitability) Do not sow as risk is medium Do not sow as risk is medium Sow
Blackspot risk Medium Medium Low

Maitland

Rainfall to date: 96.6mm. Days with significant stubble moisture: 60

Weekly forecast 4 June 11 June 18 June
Blackspot severity 2 1 1
Sowing guide (based on agronomic suitability) Okay to sow Okay to sow Okay to sow
Blackspot risk Low Low Low

Mannum

Rainfall to date: 40.5mm. Days with significant stubble moisture: 30

Weekly forecast 4 June 11 June 18 June
Blackspot severity 5 5 3-4
Sowing guide (based on agronomic suitability) Do not sow as risk is high Do not sow as risk is high Do not sow as risk is medium
Blackspot risk High High Medium

Minlaton

Rainfall to date: 78.1mm. Days with significant stubble moisture: 41

Weekly forecast 4 June 11 June 18 June
Blackspot severity 3-4 3-4 2
Sowing guide (based on agronomic suitability) Do not sow as risk is high Do not sow as risk is medium Sow
Blackspot risk Medium Medium Low

Minnipa

Rainfall to date: 43.7mm. Days with significant stubble moisture: 36

Weekly forecast 4 June 11 June 18 June
Blackspot severity 5 3-4 3-4
Sowing guide (based on agronomic suitability) Do not sow as risk is high Getting too late to sow and risk is medium Getting too late to sow and risk is medium
Blackspot risk High Medium Medium

Mount Barker

Rainfall to date: 172.2mm. Days with significant stubble moisture: 85

Weekly forecast 4 June 11 June 18 June
Blackspot severity 1 1 1
Sowing guide (based on agronomic suitability) Marginally early Okay to sow Marginally early
Blackspot risk Low Low Low

Murray Bridge

Rainfall to date: 52mm. Days with significant stubble moisture: 35

Weekly forecast 4 June 11 June 18 June
Blackspot severity 5 3-4 3-4
Sowing guide (based on agronomic suitability) Getting too late to sow and risk is high Getting too late to sow and risk is medium Getting too late to sow and risk is medium
Blackspot risk High Medium Medium

Mypolonga

Rainfall to date: 43.2mm. Days with significant stubble moisture: 30

Weekly forecast 4 June 11 June 18 June
Blackspot severity 5 5 3-4
Sowing guide (based on agronomic suitability) Do not sow as risk is high Do not sow as risk is high Do not sow as risk is medium
Blackspot risk High High Medium

Naracoorte

Rainfall to date: 99.1mm. Days with significant stubble moisture: 77

Weekly forecast 4 June 11 June 18 June
Blackspot severity 1 1 1
Sowing guide (based on agronomic suitability) Okay to sow Okay to sow Okay to sow
Blackspot risk Low Low Low

Nuriootpa

Rainfall to date: 94.7mm. Days with significant stubble moisture: 61

Weekly forecast 4 June 11 June 18 June
Blackspot severity 2 1 1
Sowing guide (based on agronomic suitability) Okay to sow Okay to sow Okay to sow
Blackspot risk Low Low Low

Palmer

Rainfall to date: 69.6mm. Days with significant stubble moisture: 56

Weekly forecast 4 June 11 June 18 June
Blackspot severity 2 2 1
Sowing guide (based on agronomic suitability) Okay to sow Okay to sow Okay to sow
Blackspot risk Low Low Low

Port Broughton

Rainfall to date: 85.6mm. Days with significant stubble moisture: 55

Weekly forecast 4 June 11 June 18 June
Blackspot severity 2 2 1
Sowing guide (based on agronomic suitability) Okay to sow Okay to sow Okay to sow
Blackspot risk Low Low Low

Riverton

Rainfall to date: 97.3mm. Days with significant stubble moisture: 56

Weekly forecast 4 June 11 June 18 June
Blackspot severity 2 2 1
Sowing guide (based on agronomic suitability) Okay to sow Okay to sow Okay to sow
Blackspot risk Low Low Low

Sedan

Rainfall to date: 47.2mm. Days with significant stubble moisture: 41

Weekly forecast 4 June 11 June 18 June
Blackspot severity 3-4 3-4 2
Sowing guide (based on agronomic suitability) Okay to sow but risk is medium Okay to sow but risk is medium Okay to sow
Blackspot risk Medium Medium Low

Snowtown

Rainfall to date: 93.2mm. Days with significant stubble moisture: 53

Weekly forecast 4 June 11 June 18 June
Blackspot severity 2 2 1
Sowing guide (based on agronomic suitability) Okay to sow Okay to sow Okay to sow
Blackspot risk Low Low Low

Strathalbyn

Rainfall to date: 82.5mm. Days with significant stubble moisture: 59

Weekly forecast 4 June 11 June 18 June
Blackspot severity 2 1 1
Sowing guide (based on agronomic suitability) Marginally late to sow Getting late to sow Getting late to sow
Blackspot risk Low Low Low

Tumby Bay

Rainfall to date: 51.7mm. Days with significant stubble moisture: 30

Weekly forecast 4 June 11 June 18 June
Blackspot severity 5 5 3-4
Sowing guide (based on agronomic suitability) Okay to sow but disease risk is high Okay to sow but disease risk is high Okay to sow but disease risk is medium
Blackspot risk High High Medium

Yeelanna

Rainfall to date: 83.6mm. Days with significant stubble moisture: 39

Weekly forecast 4 June 11 June 18 June
Blackspot severity 5 3-4 2
Sowing guide (based on agronomic suitability) Okay to sow but disease risk is high Okay to sow but disease risk is medium Okay to sow
Blackspot risk High Medium Low

Yorketown

Rainfall to date: 67.6mm. Days with significant stubble moisture: 45

Weekly forecast 4 June 11 June 18 June
Blackspot severity 3-4 3-4 2
Sowing guide (based on agronomic suitability) Okay to sow but disease risk is medium Okay to sow but disease risk is medium Okay to sow
Blackspot risk Medium Medium Low

More information

For more information contact Dr Jenny Davidson [1] at SARDI on +61 (0)8 8303 9389.

SARDI [2]SARDI [3]

Links
[1] mailto:Jenny.Davidson@sa.gov.au
[2] https://www.agric.wa.gov.au/sites/gateway/files/styles/original/public/SA_0.jpg?itok=oIZCz0ij
[3] https://www.agric.wa.gov.au/sites/gateway/files/styles/original/public/SA2.jpg?itok=bF0gWnAo

Source URL: https://www.agric.wa.gov.au/field-peas/field-pea-blackspot-management-guide-south-australia-5-june-2018
This print version was generated at 12:14am on the 20th of April, 2024.
The original document was last revised at Tue, 12/06/2018 - 10:04am

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Important disclaimer

The Chief Executive Officer of the Department of Primary Industries and Regional Development and the State of Western Australia accept no liability whatsoever by reason of negligence or otherwise arising from the use or release of this information or any part of it.