Field pea blackspot management guide for Western Australia - 3 June 2020

Page last updated: Friday, 5 June 2020 - 12:59pm

Please note: This content may be out of date and is currently under review.

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 1st 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.

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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: 119.6 mm.  Days with significant stubble moisture: 53

1 June

8 June

15 June

62% spore released - blackspot risk low

75% spore released - blackspot risk low

86% spore released - blackspot risk low

Sow – do not sow dry

Sow – do not sow dry

Sow – do not sow dry

Boyup Brook

Rainfall to date: 151 mm.  Days with significant stubble moisture: 48

1 June

8 June

15 June

50% spore released - blackspot risk medium

66% spore released - blackspot risk low

79% spore released - blackspot risk low

Sow – do not sow dry

Sow – do not sow dry

Sow – do not sow dry

Cunderdin

Rainfall to date: 129.2 mm.  Days with significant stubble moisture: 30

1 June

8 June

15 June

12% spore released - blackspot risk high

25% spore released - blackspot risk high

41% spore released - blackspot risk medium

Do not sow

Do not sow

Do not sow

Dalwallinu

Rainfall to date: 131 mm.  Days with significant stubble moisture: 38

1 June

8 June

15 June

27% spore released - blackspot risk high

43% spore released - blackspot risk medium

59% spore released - blackspot risk medium

Do not sow

Sow- do not sow dry

Sow- do not sow dry

Dowerin

Rainfall to date: 167 mm.  Days with significant stubble moisture: 40

1 June

8 June

15 June

31% spore released - blackspot risk medium

48% spore released - blackspot risk medium

64% spore released - blackspot risk low

Do not sow

Sow- do not sow dry

Sow- do not sow dry

Gairdner

Rainfall to date: 93.1 mm.  Days with significant stubble moisture: 60

1 June

8 June

15 June

75% spore released - blackspot risk low

86% spore released - blackspot risk low

93% spore released - blackspot risk low

Sow – do not sow dry

Sow – do not sow dry

Sow – do not sow dry

Grass Patch

Rainfall to date: 110 mm.  Days with significant stubble moisture: 67

1 June

8 June

15 June

86% spore released - blackspot risk low

93% spore released - blackspot risk low

97% spore released - blackspot risk low

Sow – do not sow dry

Sow – do not sow dry

Sow – do not sow dry

Hillman

Rainfall to date: 118.1 mm.  Days with significant stubble moisture: 43

1 June

8 June

15 June

38% spore released - blackspot risk medium

55% spore released - blackspot risk medium

70% spore released - blackspot risk low

Do not sow

Sow – do not sow dry

Sow – do not sow dry

Jacup

Rainfall to date: 142.2 mm.  Days with significant stubble moisture: 61

1 June

8 June

15 June

77% spore released - blackspot risk low

87% spore released - blackspot risk low

94% spore released - blackspot risk low

Sow – do not sow dry

Sow – do not sow dry

Sow – do not sow dry

Katanning

Rainfall to date: 128.6 mm.  Days with significant stubble moisture: 39

1 June

8 June

15 June

29% spore released - blackspot risk high

46% spore released - blackspot risk medium

62% spore released - blackspot risk low

Do not sow

Sow- do not sow dry

Sow- do not sow dry

Kojonup

Rainfall to date: 126.4 mm.  Days with significant stubble moisture: 47

1 June

8 June

15 June

48% spore released - blackspot risk medium

64% spore released - blackspot risk low

77% spore released - blackspot risk low

Sow – do not sow dry

Sow – do not sow dry

Sow – do not sow dry

Kondinin

Rainfall to date: 110.9 mm.  Days with significant stubble moisture: 55

1 June

8 June

15 June

66% spore released - blackspot risk low

79% spore released - blackspot risk low

88% spore released - blackspot risk low

Sow – do not sow dry

Sow – do not sow dry

Sow – do not sow dry

Kulin

Rainfall to date: 136.7 mm.  Days with significant stubble moisture: 55

1 June

8 June

15 June

66% spore released - blackspot risk low

79% spore released - blackspot risk low

88% spore released - blackspot risk low

Sow – do not sow dry

Sow – do not sow dry

Sow – do not sow dry

Lake King

Rainfall to date: 110.1 mm.  Days with significant stubble moisture: 60

1 June

8 June

15 June

75% spore released - blackspot risk low

86% spore released - blackspot risk low

93% spore released - blackspot risk low

Sow – do not sow dry

Sow – do not sow dry

Sow – do not sow dry

Merredin

Rainfall to date: 122.5 mm.  Days with significant stubble moisture: 42

1 June

8 June

15 June

36% spore released - blackspot risk medium

53% spore released - blackspot risk medium

68% spore released - blackspot risk low

Sow –do not sow dry

Sow –do not sow dry

Sow –do not sow dry

Mingenew

Rainfall to date: 131.5 mm.  Days with significant stubble moisture: 31

1 June

8 June

15 June

13% spore released - blackspot risk high

27% spore released - blackspot risk high

43% spore released - blackspot risk medium

Do not sow

Do not sow

Do not sow

Moora North West

Rainfall to date: 119.9 mm.  Days with significant stubble moisture: 42

1 June

8 June

15 June

36% spore released - blackspot risk medium

53% spore released - blackspot risk medium

68% spore released - blackspot risk low

Do not sow

Sow- do not sow dry

Sow- do not sow dry

Mount Howick

Rainfall to date: 132.4 mm.  Days with significant stubble moisture: 59

1 June

8 June

15 June

74% spore released - blackspot risk low

85% spore released - blackspot risk low

92% spore released - blackspot risk low

Sow – do not sow dry

Sow – do not sow dry

Sow – do not sow dry

Mt Barker

Rainfall to date: 178.5 mm.  Days with significant stubble moisture: 93

1 June

8 June

15 June

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: 111.4 mm.  Days with significant stubble moisture: 41

1 June

8 June

15 June

34% spore released - blackspot risk medium

41% spore released - blackspot risk medium

57% spore released - blackspot risk medium

Do not sow

Sow - do not sow dry

Sow – do not sow dry

Narrogin

Rainfall to date: 122.9 mm.  Days with significant stubble moisture: 49

1 June

8 June

15 June

53% spore released - blackspot risk medium

68% spore released - blackspot risk low

80% spore released - blackspot risk low

Sow – do not sow dry

Sow – do not sow dry

Sow – do not sow dry

Newdegate

Rainfall to date: 96.6 mm.  Days with significant stubble moisture: 51

1 June

8 June

15 June

57% spore released - blackspot risk medium

72% spore released - blackspot risk low

83% spore released - blackspot risk low

Sow – do not sow dry

Sow – do not sow dry

Sow – do not sow dry

Northam

Rainfall to date: 97.8 mm.  Days with significant stubble moisture: 43

1 June

8 June

15 June

38% spore released - blackspot risk medium

55% spore released - blackspot risk medium

70% spore released - blackspot risk low

Do not sow

Sow – do not sow dry

Sow – do not sow dry

Pingrup

Rainfall to date: 94 mm.  Days with significant stubble moisture: 54

1 June

8 June

15 June

64% spore released - blackspot risk low

77% spore released - blackspot risk low

87% spore released - blackspot risk low

Sow – do not sow dry

Sow – do not sow dry

Sow – do not sow dry

Salmon Gums

Rainfall to date: 128.2 mm.  Days with significant stubble moisture: 67

1 June

8 June

15 June

86% spore released - blackspot risk low

93% spore released - blackspot risk low

97% spore released - blackspot risk low

Sow – do not sow dry

Sow – do not sow dry

Sow – do not sow dry

Scaddan

Rainfall to date: 126.8 mm.  Days with significant stubble moisture: 66

1 June

8 June

15 June

85% spore released - blackspot risk low

92% spore released - blackspot risk low

97% spore released - blackspot risk low

Sow – do not sow dry

Sow – do not sow dry

Sow – do not sow dry

Tammin

Rainfall to date: 109.2 mm.  Days with significant stubble moisture: 35

1 June

8 June

15 June

21% spore released - blackspot risk high

36% spore released - blackspot risk medium

53% spore released - blackspot risk medium

Do not sow

Do not sow

Sow – do not sow dry

Toodyay

Rainfall to date: 99.7 mm.  Days with significant stubble moisture: 47

1 June

8 June

15 June

48% spore released - blackspot risk medium

64% spore released - blackspot risk low

77% spore released - blackspot risk low

Sow- do not sow dry

Sow – do not sow dry

Sow – do not sow dry