Field pea blackspot management guide for South Australia - 21 June 2018

Page last updated: Tuesday, 26 June 2018 - 9:22am

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 18 June 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

Last date used for prediction: 17 June 2018. Rainfall to date: 87.1mm
Days with significant stubble moisture: 45

Weekly forecast 17 June 24 June 1 July
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

Blyth (Hart)

Last date used for prediction: 17 June 2018. Rainfall to date: 112.5mm
Days with significant stubble moisture: 69

Weekly forecast 17 June 24 June 1 July
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

Bordertown

Last date used for prediction: 17 June 2018. Rainfall to date: 131.1mm
Days with significant stubble moisture: 55

Weekly forecast 17 June 24 June 1 July
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

Bute

Last date used for prediction: 17 June 2018. Rainfall to date: 121.7mm
Days with significant stubble moisture: 69

Weekly forecast 17 June 24 June 1 July
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

Clare

Last date used for prediction: 17 June 2018. Rainfall to date: 160.4mm
Days with significant stubble moisture: 81

Weekly forecast 17 June 24 June 1 July
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

Last date used for prediction: 17 June 2018. Rainfall to date: 89mm
Days with significant stubble moisture: 40

Weekly forecast 17 June 24 June 1 July
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

Eudunda

Last date used for prediction: 17 June 2018. Rainfall to date: 116.6mm
Days with significant stubble moisture: 66

Weekly forecast 17 June 24 June 1 July
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

Farrell Flat

Last date used for prediction: 17 June 2018. Rainfall to date: 121.3mm
Days with significant stubble moisture: 64

Weekly forecast 17 June 24 June 1 July
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

Keith

Last date used for prediction: 17 June 2018. Rainfall to date: 131.2mm
Days with significant stubble moisture: 48

Weekly forecast 17 June 24 June 1 July
Blackspot severity 3-4 2 2
Sowing guide (based on agronomic suitability) Okay to sow but risk is medium Okay to sow Okay to sow
Blackspot risk Medium Low Low

Kimba

Last date used for prediction: 17 June 2018. Rainfall to date: 83.4mm
Days with significant stubble moisture: 38

Weekly forecast 17 June 24 June 1 July
Blackspot severity 5 3-4 3-4
Sowing guide (based on agronomic suitability) Okay to sow but risk is high Okay to sow but risk is medium Okay to sow but risk is medium
Blackspot risk High Medium Medium

Kingsford

Last date used for prediction: 17 June 2018. Rainfall to date: 119.5mm
Days with significant stubble moisture: 80

Weekly forecast 17 June 24 June 1 July
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

Last date used for prediction: 17 June 2018. Rainfall to date: 63.1mm
Days with significant stubble moisture: 40

Weekly forecast 17 June 24 June 1 July
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

Lameroo

Last date used for prediction: 17 June 2018. Rainfall to date: 68.7mm
Days with significant stubble moisture: 35

Weekly forecast 17 June 24 June 1 July
Blackspot severity 5 5 5
Sowing guide (based on agronomic suitability) Okay to sow but risk is high Okay to sow but risk is high Okay to sow but risk is high
Blackspot risk High High High

Lock

Last date used for prediction: 17 June 2018. Rainfall to date: 81.4mm
Days with significant stubble moisture: 50

Weekly forecast 17 June 24 June 1 July
Blackspot severity 3-4 2 1
Sowing guide (based on agronomic suitability) Okay to sow but risk is medium Okay to sow Okay to sow
Blackspot risk Medium Low Low

Maitland

Last date used for prediction: 17 June 2018. Rainfall to date: 150.7mm
Days with significant stubble moisture: 74

Weekly forecast 17 June 24 June 1 July
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

Mannum

Last date used for prediction: 17 June 2018. Rainfall to date: 66.5mm
Days with significant stubble moisture: 40

Weekly forecast 17 June 24 June 1 July
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

Minlaton

Last date used for prediction: 17 June 2018.Rainfall to date: 110.1mm
Days with significant stubble moisture: 48

Weekly forecast 17 June 24 June 1 July
Blackspot severity 3-4 2 2
Sowing guide (based on agronomic suitability) Okay to sow but risk is medium Okay to sow Okay to sow
Blackspot risk Medium Low Low

Minnipa

Last date used for prediction: 17 June 2018. Rainfall to date: 54.7mm
Days with significant stubble moisture: 36

Weekly forecast 17 June 24 June 1 July
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

Mount Barker

Last date used for prediction: 17 June 2018. Rainfall to date: 237.7mm
Days with significant stubble moisture: 92

Weekly forecast 17 June 24 June 1 July
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

Murray Bridge

Last date used for prediction: 17 June 2018. Rainfall to date: 62mm
Days with significant stubble moisture: 32

Weekly forecast 17 June 24 June 1 July
Blackspot severity 5 5 3-4
Sowing guide (based on agronomic suitability) Okay to sow but risk is high Okay to sow but risk is high Okay to sow but risk is medium
Blackspot risk High High Medium

Mypolonga

Last date used for prediction: 17 June 2018. Rainfall to date: 58.7mm
Days with significant stubble moisture: 34

Weekly forecast 17 June 24 June 1 July
Blackspot severity 5 3-4 3-4
Sowing guide (based on agronomic suitability) Okay to sow but risk is high Okay to sow but risk is medium Okay to sow but risk is medium
Blackspot risk High Medium Medium

Naracoorte

Last date used for prediction: 17 June 2018. Rainfall to date: 161.2mm
Days with significant stubble moisture: 84

Weekly forecast 17 June 24 June 1 July
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

Last date used for prediction: 17 June 2018. Rainfall to date: 123.6mm
Days with significant stubble moisture: 70

Weekly forecast 17 June 24 June 1 July
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

Palmer

Last date used for prediction: 17 June 2018. Rainfall to date: 100.4mm
Days with significant stubble moisture: 62

Weekly forecast 17 June 24 June 1 July
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

Port Broughton

Last date used for prediction: 17 June 2018. Rainfall to date: 112.5mm
Days with significant stubble moisture: 61

Weekly forecast 17 June 24 June 1 July
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

Riverton

Last date used for prediction: 17 June 2018. Rainfall to date: 135mm
Days with significant stubble moisture: 65

Weekly forecast 17 June 24 June 1 July
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

Sedan

Last date used for prediction: 17 June 2018. Rainfall to date: 71.8mm
Days with significant stubble moisture: 50

Weekly forecast 17 June 24 June 1 July
Blackspot severity 3-4 2 1
Sowing guide (based on agronomic suitability) Okay to sow but risk is medium Okay to sow Okay to sow
Blackspot risk Medium Low Low

Snowtown

Last date used for prediction: 17 June 2018. Rainfall to date: 122.6mm
Days with significant stubble moisture: 73

Weekly forecast 17 June 24 June 1 July
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

Strathalbyn

Last date used for prediction: 17 June 2018. Rainfall to date: 121.4mm
Days with significant stubble moisture: 66

Weekly forecast 17 June 24 June 1 July
Blackspot severity 1 1 1
Sowing guide (based on agronomic suitability) Getting late to sow Getting late to sow Getting late to sow
Blackspot risk Low Low Low

Tumby Bay

Last date used for prediction: 17 June 2018. Rainfall to date: 76mm
Days with significant stubble moisture: 39

Weekly forecast 17 June 24 June 1 July
Blackspot severity 5 3-4 2
Sowing guide (based on agronomic suitability) Okay to sow but risk is high Okay to sow but risk is medium Okay to sow
Blackspot risk High Medium Low

Yeelanna

Last date used for prediction: 17 June 2018. Rainfall to date: 117.8mm
Days with significant stubble moisture: 48

Weekly forecast 17 June 24 June 1 July
Blackspot severity 3-4 2 2
Sowing guide (based on agronomic suitability) Okay to sow but risk is medium Okay to sow Okay to sow
Blackspot risk Medium Low Low

Yorketown

Last date used for prediction: 17 June 2018. Rainfall to date: 89.4mm
Days with significant stubble moisture: 51

Weekly forecast 17 June 24 June 1 July
Blackspot severity 3-4 2 1
Sowing guide (based on agronomic suitability) Okay to sow but risk is medium Okay to sow Okay to sow
Blackspot risk Medium Low Low

More information

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

SARDI
SARDI

Contact information

Jean Galloway
+61 (0)8 9690 2172