Field pea blackspot management guide for Western Australia - 23 May 2022

Page last updated: Tuesday, 24 May 2022 - 3:55pm

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 2022 to 22nd May 2022 from the nearest weather station.

You may notice weather station changes for one location, this is to ensure that the weather data being used is the most accurate available for the area, and can be influenced by BOM locations. The location that has changed is Lake King which now is Lake Camm.

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

Bencubbin

Last date used for prediction: 22 May 2022
Rainfall to date: 149.7 mm Days with significant stubble moisture: 46

22 May

29 May

5 June

46% spores released - blackspot risk medium

59% spores released - blackspot risk medium

74% spores released - blackspot risk low

Do not sow

Sow - do not sow dry

Sow - do not sow dry

Boyup Brook

Last date used for prediction: 22 May 2022
Rainfall to date: 72.5 mm Days with significant stubble moisture: 46

22 May

29 May

5 June

46% spores released - blackspot risk medium

62% spores released - blackspot risk low

75% spores released - blackspot risk low

Do not sow

Sow - do not sow dry

Sow - do not sow dry

Cunderdin

Last date used for prediction: 22 May 2022
Rainfall to date: 99.1 mm Days with significant stubble moisture: 36

22 May

29 May

5 June

23% spores released - blackspot risk high

36% spores released - blackspot risk medium

53% spores released - blackspot risk medium

Do not sow

Do not sow

Sow - do not sow dry

Dalwallinu

Last date used for prediction: 22 May 2022
Rainfall to date: 80.4 mm Days with significant stubble moisture: 39

22 May

29 May

5 June

29% spores released - blackspot risk high

43% spores released - blackspot risk medium

59% spores released - blackspot risk medium

Do not sow

Sow - do not sow dry

Sow - do not sow dry

Darkan

Last date used for prediction: 22 May 2022
Rainfall to date: 88.1 mm Days with significant stubble moisture: 44

22 May

29 May

5 June

41% spores released - blackspot risk medium

57% spores released - blackspot risk medium

72% spores released - blackspot risk low

Do not sow

Do not sow

Sow - do not sow dry

Dowerin

Last date used for prediction: 22 May 2022
Rainfall to date: 72.6 mm Days with significant stubble moisture: 50

22 May

29 May

5 June

55% spores released - blackspot risk medium

70% spores released - blackspot risk low

82% spores released - blackspot risk low

Do not sow

Sow - do not sow dry

Sow - do not sow dry

Gairdner

Last date used for prediction: 22 May 2022
Rainfall to date: 171.3 mm Days with significant stubble moisture: 87

22 May

29 May

5 June

99% 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

Grass Patch

Last date used for prediction: 22 May 2022
Rainfall to date: 171.6 mm Days with significant stubble moisture: 53

22 May

29 May

5 June

62% spores released - blackspot risk low

74% spores released - blackspot risk low

85% spores released - blackspot risk low

Sow - do not sow dry

Sow - do not sow dry

Sow - do not sow dry

Jacup

Last date used for prediction: 22 May 2022
Rainfall to date: 236 mm Days with significant stubble moisture: 71

22 May

29 May

5 June

90% spores released - blackspot risk low

95% spores released - blackspot risk low

98% spores released - blackspot risk low

Sow - do not sow dry

Sow - do not sow dry

Sow - do not sow dry

Katanning

Last date used for prediction: 22 May 2022
Rainfall to date: 109.4 mm Days with significant stubble moisture: 46

22 May

29 May

5 June

46% spores released - blackspot risk medium

59% spores released - blackspot risk medium

74% spores released - blackspot risk low

Do not sow

Do not sow

Sow - do not sow dry

Kojonup

Last date used for prediction: 22 May 2022
Rainfall to date: 109.2 mm Days with significant stubble moisture: 44

22 May

29 May

5 June

41% spores released - blackspot risk medium

55% spores released - blackspot risk medium

70% spores released - blackspot risk low

Do not sow

Do not sow

Sow - do not sow dry

Kondinin

Last date used for prediction: 22 May 2022
Rainfall to date: 101.9 mm Days with significant stubble moisture: 32

22 May

29 May

5 June

15% spores released - blackspot risk high

29% spores released - blackspot risk high

46% spores released - blackspot risk medium

Do not sow

Do not sow

Sow - do not sow dry

Kulin

Last date used for prediction: 22 May 2022
Rainfall to date: 82.3 mm Days with significant stubble moisture: 31

22 May

29 May

5 June

13% spores released - blackspot risk high

25% spores released - blackspot risk high

41% spores released - blackspot risk medium

Do not sow

Do not sow

Sow - do not sow dry

Lake Camm

Last date used for prediction: 22 May 2022
Rainfall to date: 145.3 mm Days with significant stubble moisture: 55

22 May

29 May

5 June

66% spores released - blackspot risk low

79% spores released - blackspot risk low

88% spores released - blackspot risk low

Sow - do not sow dry

Sow - do not sow dry

Sow - do not sow dry

Merredin

Last date used for prediction: 22 May 2022
Rainfall to date: 140 mm Days with significant stubble moisture: 55

22 May

29 May

5 June

66% 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

Mingenew

Last date used for prediction: 22 May 2022
Rainfall to date: 72.9 mm Days with significant stubble moisture: 35

22 May

29 May

5 June

21% spores released - blackspot risk high

34% spores released - blackspot risk medium

50% spores released - blackspot risk medium

Do not sow

Do not sow

Sow - do not sow dry

Moora North West

Last date used for prediction: 22 May 2022
Rainfall to date: 203.2 mm Days with significant stubble moisture: 45

22 May

29 May

5 June

43% spores released - blackspot risk medium

59% spores released - blackspot risk medium

74% spores released - blackspot risk low

Do not sow

Sow - do not sow dry

Sow - do not sow dry

Mount Howick

Last date used for prediction: 22 May 2022
Rainfall to date: 149.6 mm Days with significant stubble moisture: 55

22 May

29 May

5 June

66% spores released - blackspot risk low

79% spores released - blackspot risk low

88% spores released - blackspot risk low

Sow - do not sow dry

Sow - do not sow dry

Sow - do not sow dry

Mount Madden East

Last date used for prediction: 22 May 2022
Rainfall to date: 146.4 mm Days with significant stubble moisture: 47

22 May

29 May

5 June

48% spores released - blackspot risk medium

64% spores released - blackspot risk low

77% spores released - blackspot risk low

Do not sow

Sow - do not sow dry

Sow - do not sow dry

Mt Barker 

Last date used for prediction: 22 May 2022
Rainfall to date: 159.8 mm Days with significant stubble moisture: 78

22 May

29 May

5 June

96% spores released - blackspot risk low

98% spores released - blackspot risk low

99% spores released - blackspot risk low

Too early to sow before the 25th May

Sow - do not sow dry

Sow - do not sow dry

Mullewa

Last date used for prediction: 22 May 2022
Rainfall to date: 117.8 mm Days with significant stubble moisture: 41

22 May

29 May

5 June

34% spores released - blackspot risk medium

48% spores released - blackspot risk medium

64% spores released - blackspot risk low

Do not sow

Sow - do not sow dry

Sow - do not sow dry

Narrogin

Last date used for prediction: 22 May 2022
Rainfall to date: 68.2 mm Days with significant stubble moisture: 25

22 May

29 May

5 June

5% spores released - blackspot risk high

13% spores released - blackspot risk high

27% spores released - blackspot risk high

Do not sow

Do not sow

Do not sow

Newdegate

Last date used for prediction: 22 May 2022
Rainfall to date: 106.2 mm Days with significant stubble moisture: 36

22 May

29 May

5 June

23% spores released - blackspot risk high

36% spores released - blackspot risk medium

53% spores released - blackspot risk medium

Do not sow

Do not sow

Sow - do not sow dry

Northam

Last date used for prediction: 22 May 2022
Rainfall to date: 71 mm Days with significant stubble moisture: 40

22 May

29 May

5 June

31% spores released - blackspot risk medium

48% spores released - blackspot risk medium

64% spores released - blackspot risk low

Do not sow

Do not sow

Sow - do not sow dry

Pingrup

Last date used for prediction: 22 May 2022
Rainfall to date: 108.5 mm Days with significant stubble moisture: 46

22 May

29 May

5 June

46% spores released - blackspot risk medium

62% spores released - blackspot risk low

75% spores released - blackspot risk low

Do not sow

Sow - do not sow dry

Sow - do not sow dry

Ravensthorpe

Last date used for prediction: 22 May 2022
Rainfall to date: 219.4 mm Days with significant stubble moisture: 53

22 May

29 May

5 June

62% spores released - blackspot risk low

75% spores released - blackspot risk low

86% spores released - blackspot risk low

Sow - do not sow dry

Sow - do not sow dry

Sow - do not sow dry

Salmon Gums

Last date used for prediction: 22 May 2022
Rainfall to date: 130.2 mm Days with significant stubble moisture: 48

22 May

29 May

5 June

50% spores released - blackspot risk medium

66% spores released - blackspot risk low

79% spores released - blackspot risk low

Do not sow

Sow - do not sow dry

Sow - do not sow dry

Scaddan

Last date used for prediction: 22 May 2022
Rainfall to date: 166 mm Days with significant stubble moisture: 62

22 May

29 May

5 June

79% spores released - blackspot risk low

87% spores released - blackspot risk low

94% spores released - blackspot risk low

Sow - do not sow dry

Sow - do not sow dry

Sow - do not sow dry

Tammin

Last date used for prediction: 22 May 2022
Rainfall to date: 101.7 mm Days with significant stubble moisture: 43

22 May

29 May

5 June

38% spores released - blackspot risk medium

53% spores released - blackspot risk medium

68% spores released - blackspot risk low

Do not sow

Do not sow

Sow - do not sow dry

Toodyay

Last date used for prediction: 22 May 2022
Rainfall to date: 70.9 mm Days with significant stubble moisture: 38

22 May

29 May

5 June

27% spores released - blackspot risk high

43% spores released - blackspot risk medium

59% spores released - blackspot risk medium

Do not sow

Do not sow

Sow - do not sow dry

Contact information

Jean Galloway
+61 (0)8 9690 2172