Field pea blackspot management guide for Western Australia - 26 June 2023

Page last updated: Tuesday, 27 June 2023 - 10:46am

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 spore 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.

This prediction is based on DPIRD's Blackspot Manager model using weather data from 1st January 2023 to 25th June 2023 from the nearest weather station.

You may notice weather station changes for some locations. This is to ensure that the weather data being used is the most accurate available for the area and uses open DPIRD and BOM weather stations whenever possible. In some locations, a suitable weather station may not be available and so we may use interpolated weather data, which uses data from surrounding stations to create reasonable values for missing weather data.

Sowing time can depend on a range of factors and it is recommended to consult an agronomist to determine the optimal sowing window for your situation.

Missing a location or would like to receive email or sms alerts?

Sign up today to get alerts and add your local weather station. Text 'blackspot', your name and nearest weather station to 0475 959 932 or email BlackspotManager@dpird.wa.gov.au.

Key to blackspot severity scores

The aim is to delay sowing of field pea crops, where agronomically possible, until the majority of blackspot spores (approximately 60%) have been released prior to the crop emergence. This strategy reduces yield losses from blackspot.

Blackspot risk

Spores released (%)

Yield loss for different levels of blackspot risk scenarios (%)

Low

60 – 100

2 - 15

Medium

30 - 59

20 - 35

High

0 - 29

25 - 50

Map showing the relative current risk of spores based upon Blackspot Model outputs for various locations in Western Australia, 26th June 2023.
Map showing the relative current risk of spores based upon Blackspot Model outputs for various locations in Western Australia, 26th June 2023.

Bencubbin

Last date used for prediction: 25 June 2023
Rainfall to date: 122.9 mm
Days with significant stubble moisture: 40

26 Jun

3 Jul

10 Jul

34% spores released - blackspot risk medium

50% spores released - blackspot risk medium

66% spores released - blackspot risk low

Sow

Sow

Getting too late to sow

Cunderdin

Last date used for prediction: 25 June 2023
Rainfall to date: 177.8 mm
Days with significant stubble moisture: 59

26 Jun

3 Jul

10 Jul

75% spores released - blackspot risk low

86% spores released - blackspot risk low

93% spores released - blackspot risk low

Sow

Sow

Getting too late to sow

Dalwallinu

Last date used for prediction: 25 June 2023
Rainfall to date: 105 mm
Days with significant stubble moisture: 51

26 Jun

3 Jul

10 Jul

57% spores released - blackspot risk medium

70% spores released - blackspot risk low

82% spores released - blackspot risk low

Too late to sow

Too late to sow

Too late to sow

Darkan

Last date used for prediction: 25 June 2023
Rainfall to date: 164.8 mm
Days with significant stubble moisture: 76

26 Jun

3 Jul

10 Jul

95% spores released - blackspot risk low

98% spores released - blackspot risk low

99% spores released - blackspot risk low

Sow

Sow

Getting too late to sow

Dinninup (Boyup Brook)

Last date used for prediction: 25 June 2023
Rainfall to date: 196.8 mm
Days with significant stubble moisture: 72

26 Jun

3 Jul

10 Jul

92% spores released - blackspot risk low

97% spores released - blackspot risk low

99% spores released - blackspot risk low

Sow

Sow

Getting too late to sow

Ejanding (Dowerin)

Last date used for prediction: 25 June 2023
Rainfall to date: 144 mm
Days with significant stubble moisture: 47

26 Jun

3 Jul

10 Jul

50% spores released - blackspot risk medium

66% spores released - blackspot risk low

79% spores released - blackspot risk low

Sow

Sow

Getting too late to sow

Gairdner

Last date used for prediction: 25 June 2023
Rainfall to date: 188.5 mm
Days with significant stubble moisture: 53

26 Jun

3 Jul

10 Jul

64% spores released - blackspot risk low

77% spores released - blackspot risk low

87% spores released - blackspot risk low

Sow - do not sow dry

Sow - do not sow dry

Sow - do not sow dry

Grass Patch

Last date used for prediction: 25 June 2023
Rainfall to date: 117.8 mm
Days with significant stubble moisture: 53

26 Jun

3 Jul

10 Jul

64% spores released - blackspot risk low

77% spores released - blackspot risk low

87% spores released - blackspot risk low

Sow

Sow

Getting too late to sow

Jacup

Last date used for prediction: 25 June 2023
Rainfall to date: 195.8 mm
Days with significant stubble moisture: 51

26 Jun

3 Jul

10 Jul

59% spores released - blackspot risk medium

74% spores released - blackspot risk low

85% spores released - blackspot risk low

Sow

Sow

Getting too late to sow

Katanning

Last date used for prediction: 25 June 2023
Rainfall to date: 140.8 mm
Days with significant stubble moisture: 79

26 Jun

3 Jul

10 Jul

97% spores released - blackspot risk low

99% spores released - blackspot risk low

100% spores released - blackspot risk low

Sow

Sow

Getting too late to sow

Kojonup

Last date used for prediction: 25 June 2023
Rainfall to date: 155 mm
Days with significant stubble moisture: 55

26 Jun

3 Jul

10 Jul

68% spores released - blackspot risk low

80% spores released - blackspot risk low

89% spores released - blackspot risk low

Sow

Sow

Getting too late to sow

Kondinin

Last date used for prediction: 25 June 2023
Rainfall to date: 191.9 mm
Days with significant stubble moisture: 56

26 Jun

3 Jul

10 Jul

70% spores released - blackspot risk low

82% spores released - blackspot risk low

90% spores released - blackspot risk low

Sow

Sow

Getting too late to sow

Kulin

Last date used for prediction: 25 June 2023
Rainfall to date: 187.4 mm
Days with significant stubble moisture: 52

26 Jun

3 Jul

10 Jul

62% spores released - blackspot risk low

75% spores released - blackspot risk low

86% spores released - blackspot risk low

Sow

Sow

Getting too late to sow

Lake King

Last date used for prediction: 25 June 2023
Rainfall to date: 166.3 mm
Days with significant stubble moisture: 36

26 Jun

3 Jul

10 Jul

25% spores released - blackspot risk high

41% spores released - blackspot risk medium

57% spores released - blackspot risk medium

Sow

Sow

Getting too late to sow

Merredin

Last date used for prediction: 25 June 2023
Rainfall to date: 122.1 mm
Days with significant stubble moisture: 47

26 Jun

3 Jul

10 Jul

50% spores released - blackspot risk medium

66% spores released - blackspot risk low

79% spores released - blackspot risk low

Sow

Sow

Getting too late to sow

Mingenew

Last date used for prediction: 25 June 2023
Rainfall to date: 108.4 mm
Days with significant stubble moisture: 43

26 Jun

3 Jul

10 Jul

41% spores released - blackspot risk medium

57% spores released - blackspot risk medium

72% spores released - blackspot risk low

Sow

Sow

Getting too late to sow

Moora North West

Last date used for prediction: 25 June 2023
Rainfall to date: 127 mm
Days with significant stubble moisture: 62

26 Jun

3 Jul

10 Jul

80% spores released - blackspot risk low

89% spores released - blackspot risk low

95% spores released - blackspot risk low

Sow

Sow

Getting too late to sow

Mount Burdett

Last date used for prediction: 25 June 2023
Rainfall to date: 205.2 mm
Days with significant stubble moisture: 78

26 Jun

3 Jul

10 Jul

96% spores released - blackspot risk low

99% spores released - blackspot risk low

100% spores released - blackspot risk low

Sow

Sow

Getting too late to sow

Mount Howick

Last date used for prediction: 25 June 2023
Rainfall to date: 232 mm
Days with significant stubble moisture: 92

26 Jun

3 Jul

10 Jul

100% spores released - blackspot risk low

100% spores released - blackspot risk low

100% spores released - blackspot risk low

Sow

Sow

Getting too late to sow

Mount Madden East

Last date used for prediction: 25 June 2023
Rainfall to date: 119.8 mm
Days with significant stubble moisture: 38

26 Jun

3 Jul

10 Jul

29% spores released - blackspot risk high

46% spores released - blackspot risk medium

62% spores released - blackspot risk low

Sow

Sow

Getting too late to sow

Mt Barker WA

Last date used for prediction: 25 June 2023
Rainfall to date: 337.3 mm
Days with significant stubble moisture: 96

26 Jun

3 Jul

10 Jul

100% spores released - blackspot risk low

100% spores released - blackspot risk low

100% spores released - blackspot risk low

Sow - do not sow dry

Sow - do not sow dry

Sow - do not sow dry

Mullewa

Last date used for prediction: 25 June 2023
Rainfall to date: 132.3 mm
Days with significant stubble moisture: 55

26 Jun

3 Jul

10 Jul

68% spores released - blackspot risk low

80% spores released - blackspot risk low

89% spores released - blackspot risk low

Too late to sow

Too late to sow

Too late to sow

Narrogin

Last date used for prediction: 25 June 2023
Rainfall to date: 203.2 mm
Days with significant stubble moisture: 71

26 Jun

3 Jul

10 Jul

91% spores released - blackspot risk low

96% spores released - blackspot risk low

99% spores released - blackspot risk low

Sow

Sow

Getting too late to sow

Newdegate

Last date used for prediction: 25 June 2023
Rainfall to date: 152 mm
Days with significant stubble moisture: 53

26 Jun

3 Jul

10 Jul

64% spores released - blackspot risk low

77% spores released - blackspot risk low

87% spores released - blackspot risk low

Sow

Sow

Getting too late to sow

Northam

Last date used for prediction: 25 June 2023
Rainfall to date: 180 mm
Days with significant stubble moisture: 67

26 Jun

3 Jul

10 Jul

87% spores released - blackspot risk low

94% spores released - blackspot risk low

97% spores released - blackspot risk low

Sow

Sow

Getting too late to sow

Pingaring

Last date used for prediction: 25 June 2023
Rainfall to date: 254 mm
Days with significant stubble moisture: 61

26 Jun

3 Jul

10 Jul

79% spores released - blackspot risk low

88% spores released - blackspot risk low

94% spores released - blackspot risk low

Sow

Sow

Getting too late to sow

Pingrup

Last date used for prediction: 25 June 2023
Rainfall to date: 160.3 mm
Days with significant stubble moisture: 60

26 Jun

3 Jul

10 Jul

77% spores released - blackspot risk low

86% spores released - blackspot risk low

93% spores released - blackspot risk low

Sow

Sow

Getting too late to sow

Ravensthorpe

Last date used for prediction: 25 June 2023
Rainfall to date: 183.8 mm
Days with significant stubble moisture: 64

26 Jun

3 Jul

10 Jul

83% spores released - blackspot risk low

91% spores released - blackspot risk low

96% spores released - blackspot risk low

Sow

Sow

Getting too late to sow

Ridley North

Last date used for prediction: 25 June 2023
Rainfall to date: 140 mm
Days with significant stubble moisture: 62

26 Jun

3 Jul

10 Jul

80% spores released - blackspot risk low

89% spores released - blackspot risk low

95% spores released - blackspot risk low

Sow

Sow

Getting too late to sow

Salmon Gums

Last date used for prediction: 25 June 2023
Rainfall to date: 125.6 mm
Days with significant stubble moisture: 68

26 Jun

3 Jul

10 Jul

88% spores released - blackspot risk low

94% spores released - blackspot risk low

98% spores released - blackspot risk low

Sow

Sow

Getting too late to sow

Scaddan

Last date used for prediction: 25 June 2023
Rainfall to date: 141 mm
Days with significant stubble moisture: 45

26 Jun

3 Jul

10 Jul

46% spores released - blackspot risk medium

62% spores released - blackspot risk low

75% spores released - blackspot risk low

Sow

Sow

Getting too late to sow

Tammin

Last date used for prediction: 25 June 2023
Rainfall to date: 174.5 mm
Days with significant stubble moisture: 56

26 Jun

3 Jul

10 Jul

70% spores released - blackspot risk low

80% spores released - blackspot risk low

89% spores released - blackspot risk low

Sow

Sow

Getting too late to sow

Wattening (Bolgart & Toodyay)

Last date used for prediction: 25 June 2023
Rainfall to date: 166.8 mm
Days with significant stubble moisture: 62

26 Jun

3 Jul

10 Jul

80% spores released - blackspot risk low

89% spores released - blackspot risk low

95% spores released - blackspot risk low

Sow

Sow

Getting too late to sow

Contact information

Jean Galloway
+61 (0)8 9690 2172