Field pea blackspot management guide for South Australia - 15 May 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 14 May 2018 from the nearest weather station.

Key to blackspot severity scores

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: 55.4mm. Days with significant stubble moisture: 31

Weekly forecast 13 May 20 May 27 May
Blackspot severity 5 5 3-4
Sowing guide (based on agronomic suitability) Marginally too early Do not sow as risk is high Do not sow as risk is medium
Blackspot risk High High Medium

Blyth (Hart)

Rainfall to date: 61.2mm. Days with significant stubble moisture: 40

Weekly forecast 13 May 20 May 27 May
Blackspot severity 3-4 3-4 2
Sowing guide (based on agronomic suitability) Marginally too early Do not sow as risk is medium Okay to sow
Blackspot risk Medium Medium Low

Bordertown

Rainfall to date: 68.1mm. Days with significant stubble moisture: 38

Weekly forecast 13 May 20 May 27 May
Blackspot severity 5 3-4 3-4
Sowing guide (based on agronomic suitability) Too early Marginally too early Do not sow as risk is medium
Blackspot risk High Medium Medium

Bute

Rainfall to date: 80.2mm. Days with significant stubble moisture: 44

Weekly forecast 13 May 20 May 27 May
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 Okay to sow
Blackspot risk Medium Medium Low

Clare

Rainfall to date: 98.8mm. Days with significant stubble moisture: 52

Weekly forecast 13 May 20 May 27 May
Blackspot severity 3-4 2 1
Sowing guide (based on agronomic suitability) Too early Too early Marginally too early
Blackspot risk Medium Low Low

Crystal Brook

Rainfall to date: 42.6mm. Days with significant stubble moisture: 23

Weekly forecast 13 May 20 May 27 May
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

Eudunda

Rainfall to date: 65.8mm. Days with significant stubble moisture: 44

Weekly forecast 13 May 20 May 27 May
Blackspot severity 3-4 3-4 2
Sowing guide (based on agronomic suitability) Marginally too early Do not sow as risk is medium Okay to sow
Blackspot risk Medium Medium Low

Keith

Rainfall to date: 70mm. Days with significant stubble moisture: 30

Weekly forecast 13 May 20 May 27 May
Blackspot severity 5 5 3-4
Sowing guide (based on agronomic suitability) Marginally too early Marginally too early Do not sow as risk is medium
Blackspot risk High High Medium

Kimba

Rainfall to date: 43.4mm. Days with significant stubble moisture: 16

Weekly forecast 13 May 20 May 27 May
Blackspot severity 5 5 5
Sowing guide (based on agronomic suitability) Marginally too early Marginally too early Do not sow as risk is high
Blackspot risk High High High

Kingsford

Rainfall to date: 69.7mm. Days with significant stubble moisture: 53

Weekly forecast 13 May 20 May 27 May
Blackspot severity 2 2 1
Sowing guide (based on agronomic suitability) Marginally too early Okay to sow Okay to sow
Blackspot risk Low Low Low

Kyancutta

Rainfall to date: 45.1mm. Days with significant stubble moisture: 29

Weekly forecast 13 May 20 May 27 May
Blackspot severity 5 5 3-4
Sowing guide (based on agronomic suitability) Marginally too early Marginally too early Do not sow as risk is medium
Blackspot risk High High Medium

Lameroo

Rainfall to date: 33.3mm. Days with significant stubble moisture: 17

Weekly forecast 13 May 20 May 27 May
Blackspot severity 5 5 5
Sowing guide (based on agronomic suitability) Marginally too early Marginally too early Do not sow as risk is high
Blackspot risk High High High

Lock

Rainfall to date: 50.7mm. Days with significant stubble moisture: 32

Weekly forecast 13 May 20 May 27 May
Blackspot severity 5 5 3-4
Sowing guide (based on agronomic suitability) Marginally too early Marginally too early Do not sow as risk is medium
Blackspot risk High High Medium

Maitland

Rainfall to date: 74.6mm. Days with significant stubble moisture: 44

Weekly forecast 13 May 20 May 27 May
Blackspot severity 3-4 3-4 2
Sowing guide (based on agronomic suitability) Too early Marginally too early Okay to sow
Blackspot risk Medium Medium Low

Mannum

Rainfall to date: 37.5mm. Days with significant stubble moisture: 19

Weekly forecast 13 May 20 May 27 May
Blackspot severity 5 5 5
Sowing guide (based on agronomic suitability) Marginally too early Marginally too early Do not sow as risk is high
Blackspot risk High High High

Minlaton

Rainfall to date: 64mm. Days with significant stubble moisture: 32

Weekly forecast 13 May 20 May 27 May
Blackspot severity 5 5 3-4
Sowing guide (based on agronomic suitability) Marginally too early Do not sow as risk is high Do not sow as risk is medium
Blackspot risk High High Medium

Minnipa

Rainfall to date: 34.3mm. Days with significant stubble moisture: 32

Weekly forecast 13 May 20 May 27 May
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

Mount Barker SA

Rainfall to date: 144.5mm. Days with significant stubble moisture: 66

Weekly forecast 13 May 20 May 27 May
Blackspot severity 1 1 1
Sowing guide (based on agronomic suitability) Too early Too early Too early
Blackspot risk Low Low Low

Murray Bridge

Rainfall to date: 41.3mm. Days with significant stubble moisture: 25

Weekly forecast 13 May 20 May 27 May
Blackspot severity 5 5 5
Sowing guide (based on agronomic suitability) Marginally too early Marginally too early Do not sow as risk is high
Blackspot risk High High High

Mypolonga

Rainfall to date: 39.7mm. Days with significant stubble moisture: 19

Weekly forecast 13 May 20 May 27 May
Blackspot severity 5 5 5
Sowing guide (based on agronomic suitability) Marginally too early Marginally too early Do not sow as risk is high
Blackspot risk High High High

Naracoorte

Rainfall to date: 77.6mm. Days with significant stubble moisture: 59

Weekly forecast 13 May 20 May 27 May
Blackspot severity 2 1 1
Sowing guide (based on agronomic suitability) Too early Too early Marginally too early
Blackspot risk Low Low Low

Nuriootpa

Rainfall to date: 73.6mm. Days with significant stubble moisture: 42

Weekly forecast 13 May 20 May 27 May
Blackspot severity 3-4 3-4 2
Sowing guide (based on agronomic suitability) Marginally too early Do not sow as risk is medium Okay to sow
Blackspot risk Medium Medium Low

Palmer

Rainfall to date: 48.8mm. Days with significant stubble moisture: 37

Weekly forecast 13 May 20 May 27 May
Blackspot severity 5 3-4 3-4
Sowing guide (based on agronomic suitability) Marginally too early Marginally too early Do not sow as risk is medium
Blackspot risk High Medium Medium

Port Broughton

Rainfall to date: 72.9mm. Days with significant stubble moisture: 38

Weekly forecast 13 May 20 May 27 May
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

Riverton

Rainfall to date: 90.7mm. Days with significant stubble moisture: 45

Weekly forecast 13 May 20 May 27 May
Blackspot severity 3-4 3-4 2
Sowing guide (based on agronomic suitability) Too early Marginally too early Okay to sow
Blackspot risk Medium Medium Low

Sedan

Rainfall to date: 37mm. Days with significant stubble moisture: 23

Weekly forecast 13 May 20 May 27 May
Blackspot severity 5 5 5
Sowing guide (based on agronomic suitability) Marginally too early Marginally too early Do not sow as risk is high
Blackspot risk High High High

Snowtown

Rainfall to date: 79.3mm. Days with significant stubble moisture: 44

Weekly forecast 13 May 20 May 27 May
Blackspot severity 3-4 3-4 2
Sowing guide (based on agronomic suitability) Marginally too early Do not sow as risk is medium Okay to sow
Blackspot risk Medium Medium Low

Strathalbyn

Rainfall to date: 67.1mm. Days with significant stubble moisture: 42

Weekly forecast 13 May 20 May 27 May
Blackspot severity 3-4 3-4 2
Sowing guide (based on agronomic suitability) Marginally too early Do not sow as risk is medium Okay to sow
Blackspot risk Medium Medium Low

Tumby Bay

Rainfall to date: 46.8mm. Days with significant stubble moisture: 23

Weekly forecast 13 May 20 May 27 May
Blackspot severity 5 5 5
Sowing guide (based on agronomic suitability) Marginally too early Do not sow as risk is high Do not sow as risk is high
Blackspot risk High High High

Yeelanna

Rainfall to date: 80.2mm. Days with significant stubble moisture: 37

Weekly forecast 13 May 20 May 27 May
Blackspot severity 5 3-4 3-4
Sowing guide (based on agronomic suitability) Marginally too early Do not sow as risk is medium Do not sow as risk is medium
Blackspot risk High Medium Medium

Yorketown

Rainfall to date: 51.6mm. Days with significant stubble moisture: 31

Weekly forecast 13 May 20 May 27 May
Blackspot severity 5 5 3-4
Sowing guide (based on agronomic suitability) Marginally too early Do not sow as risk is high Do not sow as risk is medium
Blackspot risk High High Medium

SARDI
SARDI

Contact information

Jean Galloway
+61 (0)8 9690 2172
Page last updated: Thursday, 17 May 2018 - 2:26pm

Author

Kawsar Salam

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