Field pea blackspot management guide for Western Australia - 22 May 2023

Page last updated: Monday, 22 May 2023 - 1:45pm

Please note: This content may be out of date and is currently under review.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

This prediction is based on DPIRD's Blackspot Manager model using weather data from 1 January 2023 to 21st May 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

Bencubbin

Last date used for prediction: 21 May 2023
Rainfall to date: 91.6 mm Days with significant stubble moisture: 27

22 May

29 May

5 Jun

7% spores released - blackspot risk high

17% spores released - blackspot risk high

31% spores released - blackspot risk medium

Do not sow

Do not sow

Do not sow

Cunderdin

Last date used for prediction: 21 May 2023
Rainfall to date: 103.4 mm Days with significant stubble moisture: 39

22 May

29 May

5 Jun

29% 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

Dalwallinu

Last date used for prediction: 21 May 2023
Rainfall to date: 62 mm Days with significant stubble moisture: 31

22 May

29 May

5 Jun

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

Darkan

Last date used for prediction: 21 May 2023
Rainfall to date: 79.1 mm Days with significant stubble moisture: 50

22 May

29 May

5 Jun

55% spores released - blackspot risk medium

68% spores released - blackspot risk low

80% spores released - blackspot risk low

Do not sow

Sow - do not sow dry

Sow - do not sow dry

Dinninup (Boyup Brook)

Last date used for prediction: 21 May 2023
Rainfall to date: 68 mm Days with significant stubble moisture: 46

22 May

29 May

5 Jun

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

Ejanding (Dowerin)

Last date used for prediction: 21 May 2023
Rainfall to date: 85.8 mm Days with significant stubble moisture: 33

22 May

29 May

5 Jun

17% 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

Gairdner

Last date used for prediction: 21 May 2023
Rainfall to date: 64.4 mm Days with significant stubble moisture: 43

22 May

29 May

5 Jun

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

Grass Patch

Last date used for prediction: 21 May 2023
Rainfall to date: 56.2 mm Days with significant stubble moisture: 33

22 May

29 May

5 Jun

17% 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

Jacup

Last date used for prediction: 21 May 2023
Rainfall to date: 92.7 mm Days with significant stubble moisture: 35

22 May

29 May

5 Jun

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

Katanning

Last date used for prediction: 21 May 2023
Rainfall to date: 65.4 mm Days with significant stubble moisture: 53

22 May

29 May

5 Jun

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

Kojonup

Last date used for prediction: 21 May 2023
Rainfall to date: 56 mm Days with significant stubble moisture: 30

22 May

29 May

5 Jun

12% spores released - blackspot risk high

23% spores released - blackspot risk high

38% spores released - blackspot risk medium

Do not sow

Do not sow

Do not sow

Kondinin

Last date used for prediction: 21 May 2023
Rainfall to date: 124.4 mm Days with significant stubble moisture: 39

22 May

29 May

5 Jun

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

Kulin

Last date used for prediction: 21 May 2023
Rainfall to date: 112.4 mm Days with significant stubble moisture: 33

22 May

29 May

5 Jun

17% 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

Lake King

Last date used for prediction: 21 May 2023
Rainfall to date: 106 mm Days with significant stubble moisture: 19

22 May

29 May

5 Jun

1% spores released - blackspot risk high

5% spores released - blackspot risk high

15% spores released - blackspot risk high

Do not sow

Do not sow

Do not sow

Merredin

Last date used for prediction: 21 May 2023
Rainfall to date: 65.9 mm Days with significant stubble moisture: 29

22 May

29 May

5 Jun

10% spores released - blackspot risk high

21% spores released - blackspot risk high

36% spores released - blackspot risk medium

Do not sow

Do not sow

Sow - do not sow dry

Mingenew

Last date used for prediction: 21 May 2023
Rainfall to date: 54.3 mm Days with significant stubble moisture: 21

22 May

29 May

5 Jun

2% spores released - blackspot risk high

7% spores released - blackspot risk high

19% spores released - blackspot risk high

Do not sow

Do not sow

Do not sow

Moora North West

Last date used for prediction: 21 May 2023
Rainfall to date: 51.8 mm Days with significant stubble moisture: 38

22 May

29 May

5 Jun

27% spores released - blackspot risk high

41% spores released - blackspot risk medium

57% spores released - blackspot risk medium

Do not sow

Do not sow

Sow - do not sow dry

Mount Howick

Last date used for prediction: 21 May 2023
Rainfall to date: 123.6 mm Days with significant stubble moisture: 67

22 May

29 May

5 Jun

86% spores released - blackspot risk low

92% spores released - blackspot risk low

97% 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: 21 May 2023
Rainfall to date: 70.8 mm Days with significant stubble moisture: 18

22 May

29 May

5 Jun

1% spores released - blackspot risk high

4% spores released - blackspot risk high

13% spores released - blackspot risk high

Do not sow

Do not sow

Do not sow

Mt Barker

Last date used for prediction: 21 May 2023
Rainfall to date: 126.2 mm Days with significant stubble moisture: 70

22 May

29 May

5 Jun

89% spores released - blackspot risk low

94% spores released - blackspot risk low

98% 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: 21 May 2023
Rainfall to date: 101.2 mm Days with significant stubble moisture: 39

22 May

29 May

5 Jun

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

Narrogin

Last date used for prediction: 21 May 2023
Rainfall to date: 128.6 mm Days with significant stubble moisture: 46

22 May

29 May

5 Jun

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

Newdegate

Last date used for prediction: 21 May 2023
Rainfall to date: 101.2 mm Days with significant stubble moisture: 34

22 May

29 May

5 Jun

19% spores released - blackspot risk high

31% spores released - blackspot risk medium

48% spores released - blackspot risk medium

Do not sow

Do not sow

Sow - do not sow dry

Northam

Last date used for prediction: 21 May 2023
Rainfall to date: 99.7 mm Days with significant stubble moisture: 35

22 May

29 May

5 Jun

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

Pingaring

Last date used for prediction: 21 May 2023
Rainfall to date: 162 mm Days with significant stubble moisture: 40

22 May

29 May

5 Jun

31% spores released - blackspot risk medium

46% spores released - blackspot risk medium

62% spores released - blackspot risk low

Do not sow

Sow - do not sow dry

Sow - do not sow dry

Pingrup

Last date used for prediction: 21 May 2023
Rainfall to date: 79.1 mm Days with significant stubble moisture: 41

22 May

29 May

5 Jun

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

Ravensthorpe

Last date used for prediction: 21 May 2023
Rainfall to date: 97.6 mm Days with significant stubble moisture: 43

22 May

29 May

5 Jun

38% spores released - blackspot risk medium

53% spores released - blackspot risk medium

68% spores released - blackspot risk low

Do not sow

Sow - do not sow dry

Sow - do not sow dry

Salmon Gums

Last date used for prediction: 21 May 2023
Rainfall to date: 93.2 mm Days with significant stubble moisture: 52

22 May

29 May

5 Jun

59% spores released - blackspot risk medium

72% spores released - blackspot risk low

83% spores released - blackspot risk low

Sow - do not sow dry

Sow - do not sow dry

Sow - do not sow dry

Scaddan

Last date used for prediction: 21 May 2023
Rainfall to date: 54.6 mm Days with significant stubble moisture: 28

22 May

29 May

5 Jun

9% spores released - blackspot risk high

19% spores released - blackspot risk high

34% spores released - blackspot risk medium

Do not sow

Do not sow

Do not sow

Tammin

Last date used for prediction: 21 May 2023
Rainfall to date: 107.7 mm Days with significant stubble moisture: 35

22 May

29 May

5 Jun

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

Wattening (Bolgart & Toodyay)

Last date used for prediction: 21 May 2023
Rainfall to date: 73.5 mm Days with significant stubble moisture: 30

22 May

29 May

5 Jun

12% spores released - blackspot risk high

23% spores released - blackspot risk high

38% spores released - blackspot risk medium

Do not sow

Do not sow

Do not sow