Field pea blackspot management guide for Western Australia - 23 June 2020

Page last updated: Friday, 26 June 2020 - 1:43pm

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. 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 1st January 2020 to 22nd June 2020 from the nearest weather station.

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

Percentage yield loss (in years) for different levels of blackspot risk scenarios

Blackspot risk

5 out of 10 years

3 out of 10 years

1 out of 10 years

Low

2

5

15

Medium

20

25

35

High

25

30

50

Bencubbin

Rainfall to date: 140.4 mm.  Days with significant stubble moisture: 68

22 June

29 June

6 July

87% spore released - blackspot risk low

92% spore released - blackspot risk low

97% spore released - blackspot risk low

Sow – do not sow dry

Sow - getting too late to sow

Getting too late to sow

Boyup Brook

Rainfall to date: 219.7 mm.  Days with significant stubble moisture: 63

22 June

29 June

6 July

80% spore released - blackspot risk low

87% spore released - blackspot risk low

94% spore released - blackspot risk low

Sow – do not sow dry

Sow - getting too late to sow

Getting too late to sow

Cunderdin

Rainfall to date: 149.4 mm.  Days with significant stubble moisture: 45

22 June

29 June

6 July

43% spore released - blackspot risk medium

55% spore released - blackspot risk medium

70% spore released - blackspot risk low

Sow – do not sow dry

Sow - getting too late to sow

Getting too late to sow

Dalwallinu

Rainfall to date: 151.6 mm.  Days with significant stubble moisture: 53

22 June

29 June

6 July

62% spore released - blackspot risk low

72% spore released - blackspot risk low

83% spore released - blackspot risk low

Too late to sow – after 20th June

Too late to sow

Too late to sow

Dowerin

Rainfall to date: 185.2 mm.  Days with significant stubble moisture: 51

22 June

29 June

6 July

57% spore released - blackspot risk medium

68% spore released - blackspot risk low

80% spore released - blackspot risk low

Sow – do not sow dry

Sow - getting too late to sow

Getting too late to sow

Gairdner

Rainfall to date: 102.9 mm.  Days with significant stubble moisture: 69

22 June

29 June

6 July

88% spore released - blackspot risk low

93% spore released - blackspot risk low

97% spore released - blackspot risk low

Sow – do not sow dry

Sow - getting too late to sow

Getting too late to sow

Grass Patch

Rainfall to date: 117.8 mm.  Days with significant stubble moisture: 76

22 June

29 June

6 July

94% spore released - blackspot risk low

97% spore released - blackspot risk low

99% spore released - blackspot risk low

Sow – do not sow dry

Sow - getting too late to sow

Getting too late to sow

Hillman

Rainfall to date: 158 mm.  Days with significant stubble moisture: 61

22 June

29 June

6 July

77% spore released - blackspot risk low

85% spore released - blackspot risk low

92% spore released - blackspot risk low

Sow – do not sow dry

Sow - getting too late to sow

Getting too late to sow

Jacup

Rainfall to date: 158.7 mm.  Days with significant stubble moisture: 75

22 June

29 June

6 July

94% spore released - blackspot risk low

97% spore released - blackspot risk low

99% spore released - blackspot risk low

Sow – do not sow dry

Sow - getting too late to sow

Getting too late to sow

Katanning

Rainfall to date: 155.4 mm.  Days with significant stubble moisture: 56

22 June

29 June

6 July

68% spore released - blackspot risk low

77% spore released - blackspot risk low

87% spore released - blackspot risk low

Sow – do not sow dry

Sow - getting too late to sow

Getting too late to sow

Kojonup

Rainfall to date: 155 mm.  Days with significant stubble moisture: 64

22 June

29 June

6 July

82% spore released - blackspot risk low

88% spore released - blackspot risk low

94% spore released - blackspot risk low

Sow – do not sow dry

Sow - getting too late to sow

Getting too late to sow

Kondinin

Rainfall to date: 127.8 mm.  Days with significant stubble moisture: 71

22 June

29 June

6 July

90% spore released - blackspot risk low

94% spore released - blackspot risk low

98% spore released - blackspot risk low

Sow – do not sow dry

Sow - getting too late to sow

Getting too late to sow

Kulin

Rainfall to date: 147 mm.  Days with significant stubble moisture: 72

22 June

29 June

6 July

91% spore released - blackspot risk low

95% spore released - blackspot risk low

98% spore released - blackspot risk low

Sow – do not sow dry

Sow - getting too late to sow

Getting too late to sow

Lake King

Rainfall to date: 130 mm.  Days with significant stubble moisture: 71

22 June

29 June

6 July

90% spore released - blackspot risk low

94% spore released - blackspot risk low

98% spore released - blackspot risk low

Sow – do not sow dry

Sow - getting too late to sow

Getting too late to sow

Merredin

Rainfall to date: 151.1 mm.  Days with significant stubble moisture: 57

22 June

29 June

6 July

70% spore released - blackspot risk low

79% spore released - blackspot risk low

88% spore released - blackspot risk low

Sow – do not sow dry

Sow - getting too late to sow

Getting too late to sow

Mingenew

Rainfall to date: 156.3 mm.  Days with significant stubble moisture: 46

22 June

29 June

6 July

46% spore released - blackspot risk medium

57% spore released - blackspot risk medium

72% spore released - blackspot risk low

Sow – do not sow dry

Sow - getting too late to sow

Getting too late to sow

Moora North West

Rainfall to date: 137.5 mm.  Days with significant stubble moisture: 57

22 June

29 June

6 July

70% spore released - blackspot risk low

79% spore released - blackspot risk low

88% spore released - blackspot risk low

Sow – do not sow dry

Sow - getting too late to sow

Getting too late to sow

Mount Howick

Rainfall to date: 141.2 mm.  Days with significant stubble moisture: 73

22 June

29 June

6 July

92% spore released - blackspot risk low

96% spore released - blackspot risk low

98% spore released - blackspot risk low

Sow – do not sow dry

Sow - getting too late to sow

Getting too late to sow

Mt Barker

Rainfall to date: 192.6 mm.  Days with significant stubble moisture: 109

22 June

29 June

6 July

100% spore released - blackspot risk low

100% spore released - blackspot risk low

100% spore released - blackspot risk low

Sow – do not sow dry

Sow – do not sow dry

Sow – do not sow dry

Mullewa

Rainfall to date: 131.8 mm.  Days with significant stubble moisture: 52

22 June

29 June

6 July

59% spore released - blackspot risk medium

70% spore released - blackspot risk low

82% spore released - blackspot risk low

Too late to sow – after 20th June

Too late to sow

Too late to sow

Narrogin

Rainfall to date: 154.7 mm.  Days with significant stubble moisture: 64

22 June

29 June

6 July

82% spore released - blackspot risk low

88% spore released - blackspot risk low

94% spore released - blackspot risk low

Sow – do not sow dry

Sow - getting too late to sow

Getting too late to sow

Newdegate

Rainfall to date: 119.4 mm.  Days with significant stubble moisture: 65

22 June

29 June

6 July

83% spore released - blackspot risk low

89% spore released - blackspot risk low

95% spore released - blackspot risk low

Sow – do not sow dry

Sow - getting too late to sow

Getting too late to sow

Northam

Rainfall to date: 117.3 mm.  Days with significant stubble moisture: 58

22 June

29 June

6 July

72% spore released - blackspot risk low

80% spore released - blackspot risk low

89% spore released - blackspot risk low

Sow – do not sow dry

Sow - getting too late to sow

Getting too late to sow

Pingrup

Rainfall to date: 108.3 mm.  Days with significant stubble moisture: 69

22 June

29 June

6 July

88% spore released - blackspot risk low

93% spore released - blackspot risk low

97% spore released - blackspot risk low

Sow – do not sow dry

Sow - getting too late to sow

Getting too late to sow

Salmon Gums

Rainfall to date: 137.4 mm.  Days with significant stubble moisture: 81

22 June

29 June

6 July

97% spore released - blackspot risk low

99% spore released - blackspot risk low

100% spore released - blackspot risk low

Sow – do not sow dry

Sow - getting too late to sow

Getting too late to sow

Scaddan

Rainfall to date: 137.8 mm.  Days with significant stubble moisture: 81

22 June

29 June

6 July

97% spore released - blackspot risk low

 

99% spore released - blackspot risk low

 

100% spore released - blackspot risk low

 

Sow – do not sow dry

Sow - getting too late to sow

Getting too late to sow

Tammin

Rainfall to date: 134.5 mm.  Days with significant stubble moisture: 50

22 June

29 June

6 July

55% spore released - blackspot risk medium

66% spore released - blackspot risk low

79% spore released - blackspot risk low

Sow – do not sow dry

Sow - getting too late to sow

Getting too late to sow

Toodyay

Rainfall to date: 127.5 mm.  Days with significant stubble moisture: 62

22 June

29 June

6 July

79% spore released - blackspot risk low

86% spore released - blackspot risk low

93% spore released - blackspot risk low

Sow – do not sow dry

Sow - getting too late to sow

Getting too late to sow

Contact information

Jean Galloway
+61 (0)8 9690 2172