Field pea blackspot sowing guide for Western Australia – 4 June 2019

Page last updated: Friday, 7 June 2019 - 10:50am

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 spores 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 Department of Primary Industries and Regional Development's (DPIRD) Blackspot Manager model using weather data from 1 January 2019 to 2 June 2019 from the nearest weather station.

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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: 24.2 mm      Days with significant stubble moisture: 7

2 June

9 June

16 June

0% spore released - blackspot risk high

0% spore released - blackspot risk high

0% spore released - blackspot risk high

Sow – Do not sow dry

Sow – Do not sow dry

Do not sow – high yield loss for late sowing

Boyup Brook

Rainfall to date: 106.6 mm      Days with significant stubble moisture: 44

2 June

9 June

16 June

41% spore released - blackspot risk medium

48% spore released - blackspot risk medium

64% spore released - blackspot risk low

Sow - do not sow dry

Sow - do not sow dry

Sow

Cunderdin

Rainfall to date: 31.2 mm       Days with significant stubble moisture: 18

2 June

9 June

16 June

1% spore released - blackspot risk high

2% spore released - blackspot risk high

9% spore released - blackspot risk high

Sow – Do not sow dry

Sow – Do not sow dry

Do not sow – high yield loss for late sowing

Dalwallinu

Rainfall to date: 16.2 mm      Days with significant stubble moisture: 13

2 June

9 June

16 June

0% spore released - blackspot risk high

0% spore released - blackspot risk high

0% spore released - blackspot risk high

Sow – Do not sow dry

Sow – Do not sow dry

Do not sow – high yield loss for late sowing

Dowerin

Rainfall to date: 30.3 mm      Days with significant stubble moisture: 14

2 June

9 June

16 June

 

 0% spore released - blackspot risk high

0% spore released - blackspot risk high

0% spore released - blackspot risk high

Sow – Do not sow dry

Sow – Do not sow dry

Do not sow – high yield loss for late sowing

Gairdner

Rainfall to date: 117.8 mm     Days with significant stubble moisture: 54

2 June

9 June

16 June

64% spore released - blackspot risk low

70% spore released - blackspot risk low

82% spore released - blackspot risk low

Sow

Sow

Sow

Grass Patch

Rainfall to date: 48.7 mm      Days with significant stubble moisture: 35

2 June

9 June

16 June

10% spore released - blackspot risk high

15% spore released - blackspot risk high

29% spore released - blackspot risk high

Sow – Do not sow dry

Sow – Do not sow dry

Sow – Do not sow dry

Hillman

Rainfall to date: 47.6 mm        Days with significant stubble moisture: 30

2 June

9 June

16 June

12% spore released - blackspot risk high

17% spore released - blackspot risk high

31% spore released - blackspot risk medium

Sow – Do not sow dry

Sow – Do not sow dry

Sow – Do not sow dry

Jacup

Rainfall to date: 110.4 mm      Days with significant stubble moisture: 55

2 June

9 June

16 June

66% spore released - blackspot risk low

72% spore released - blackspot risk low

83% spore released - blackspot risk low

Sow

Sow

Sow

Katanning

Rainfall to date: 79 mm       Days with significant stubble moisture: 43

2 June

9 June

16 June

38% spore released - blackspot risk medium

46% spore released - blackspot risk medium

62% spore released - blackspot risk low

Sow – Do not sow dry

Sow – Do not sow dry

Sow 

Kojonup

Rainfall to date: 107.9 mm       Days with significant stubble moisture: 40

2 June

9 June

16 June

31% spore released - blackspot risk medium

38% spore released - blackspot risk medium

55% spore released - blackspot risk medium

Sow – Do not sow dry

Sow – Do not sow dry

Sow

Kondinin

Rainfall to date: 34.6 mm      Days with significant stubble moisture: 21

2 June

9 June

16 June

2% spore released - blackspot risk high

4% spore released - blackspot risk high

13% spore released - blackspot risk high

Sow – Do Not sow Dry

Sow – Do Not sow Dry

Do not sow – high yield loss for late sowing

Kulin

Rainfall to date: 37.3 mm       Days with significant stubble moisture: 30

2 June

9 June

16 June

12% spore released - blackspot risk high

17% spore released - blackspot risk high

31% spore released - blackspot risk medium

Sow – Do not sow dry

Sow – Do not sow dry

Sow – Do not sow dry

Lake King

Rainfall to date: 59.3 mm       Days with significant stubble moisture: 30

2 June

9 June

16 June

12% spore released - blackspot risk high

17% spore released - blackspot risk high

16 Jun

 31% spore released - blackspot risk medium

Sow – Do not sow dry

Sow – Do not sow dry

Do not sow – high yield loss for late sowing

Merredin

Rainfall to date: 35.4 mm       Days with significant stubble moisture: 19

2 June

9 June

16 June

1% spore released - blackspot risk high

3% spore released - blackspot risk high

10% spore released - blackspot risk high

Sow – Do not sow dry

Sow – Do not sow dry

Do not sow – high yield loss for late sowing

Mingenew

Rainfall to date: 11 mm      Days with significant stubble moisture: 4

2 June

9 June

16 June

0% spore released - blackspot risk high

0% spore released - blackspot risk high

0% spore released - blackspot risk high

Sow – Do not sow dry

Sow – Do not sow dry

Do not sow – high yield loss for late sowing

Moora North West

Rainfall to date: 27.4 mm       Days with significant stubble moisture: 18

2 June

9 June

16 June

1% spore released - blackspot risk high

2% spore released - blackspot risk high

9% spore released - blackspot risk high

Sow – Do not sow dry

Sow – Do not sow dry

Do not sow – high yield loss for late sowing

Mount Howick

Rainfall to date: 85.2 mm       Days with significant stubble moisture: 33

2 June

9 June

16 June

17% spore released - blackspot risk high

23% spore released - blackspot risk high

38% spore released - blackspot risk medium

Sow – Do not sow dry

Sow – Do not sow dry

Sow – Do not sow dry

Mt Barker

Rainfall to date: 169.4 mm      Days with significant stubble moisture: 70

2 June

9 June

16 June

89% spore released - blackspot risk low

92% spore released - blackspot risk low

97% spore released - blackspot risk low

Sow – do not sow dry

Sow

Sow

Mullewa

Rainfall to date: 37.3 mm       Days with significant stubble moisture: 14

2 June

9 June

16 June

0% spore released - blackspot risk high

0% spore released - blackspot risk high

4% spore released - blackspot risk high

Sow – Do not sow dry

Sow – Do not sow dry

Do not sow – high yield loss for late sowing

Narrogin

Rainfall to date: 65.4 mm       Days with significant stubble moisture: 46

2 June

9 June

16 June

46% spore released - blackspot risk medium

53% spore released - blackspot risk medium

68% spore released - blackspot risk low

Sow – Do not sow dry

Sow

Sow

Newdegate

Rainfall to date: 47.1 mm       Days with significant stubble moisture: 33

2 June

9 June

16 June

17% spore released - blackspot risk high

23% spore released - blackspot risk high

38% spore released - blackspot risk medium

Sow – Do not sow dry

Sow – Do not sow dry

Do not sow – high yield loss for late sowing

Northam

Rainfall to date: 32.1 mm       Days with significant stubble moisture: 31

2 June

9 June

16 June

13% spore released - blackspot risk high

19% spore released - blackspot risk high

34% spore released - blackspot risk medium

Sow – Do not sow dry

Sow – Do not sow dry

Sow – Do not sow dry

Pingrup

Rainfall to date: 44.4 mm       Days with significant stubble moisture: 35

2 June

9 June

16 June

21% spore released - blackspot risk high

27% spore released - blackspot risk high

43% spore released - blackspot risk medium

Sow – Do not sow dry

Sow – Do not sow dry

Sow – Do not sow dry

Salmon Gums

Rainfall to date: 52 mm       Days with significant stubble moisture: 29

2 June

9 June

16 June

10% spore released - blackspot risk high

15% spore released - blackspot risk high

29% spore released - blackspot risk high

Sow – Do not sow dry Sow – Do not sow dry

Do not sow – high yield loss for late sowing

Scaddan

Rainfall to date: 67.6 mm       Days with significant stubble moisture: 40

2 June

9 June

16 June

31% spore released - blackspot risk medium

38% spore released - blackspot risk medium

55% spore released - blackspot risk medium

Sow – Do not sow dry

Sow – Do not sow dry

Sow

Tammin

Rainfall to date: 45.3 mm       Days with significant stubble moisture: 33

2 June

9 June

16 June

17% spore released - blackspot risk high

23% spore released - blackspot risk high

38% spore released - blackspot risk medium

Sow – Do not sow dry

Sow – Do not sow dry

Do not sow – high yield loss for late sowing

Toodyay

Rainfall to date: 40.1 mm       Days with significant stubble moisture: 32

2 June

9 June

16 June

15% spore released - blackspot risk high

21% spore released - blackspot risk high

36% spore released - blackspot risk medium

Sow – Do Not sow Dry

Sow – Do Not sow Dry

Sow – Do Not sow Dry

Contact information

Jean Galloway
+61 (0)8 9690 2172

Author

Kawsar Salam

Funding bodies