Field pea blackspot sowing guide for Western Australia – 17 June 2019

Page last updated: Tuesday, 18 June 2019 - 1:11pm

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 DPIRD’s Blackspot Manager model using weather data from 1 January 2019 to 16 June 2019 from the nearest weather station.

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: 53.7 mm      Days with significant stubble moisture: 17

16 June

23 June

30 June

0% spore released - blackspot risk high

0% spore released - blackspot risk high

0% spore released - blackspot risk high

Do not sow – high yield loss for late sowing

Do not sow – high yield loss for late sowing

Do not sow – high yield loss for late sowing

Boyup Brook

Rainfall to date: 158 mm      Days with significant stubble moisture: 53

16 June

23 June

30 June

62% spore released - blackspot risk low

75% spore released - blackspot risk low

86% spore released - blackspot risk low

Sow

Sow

Sow

Cunderdin

Rainfall to date: 68.8 mm     Days with significant stubble moisture: 28

16 June

23 June

30 June

9% spore released - blackspot risk high

15% spore released - blackspot risk high

29% spore released - blackspot risk high

Do not sow – high yield loss for late sowing

Do not sow – high yield loss for late sowing

Do not sow – high yield loss for late sowing

Dalwallinu

Rainfall to date: 61.8 mm     Days with significant stubble moisture: 23

16 June

23 June

30 June

0% spore released - blackspot risk high

0% spore released - blackspot risk high

0% spore released - blackspot risk high

Do not sow – high yield loss for late sowing

Do not sow – high yield loss for late sowing

Do not sow – high yield loss for late sowing

Dowerin

Rainfall to date: 78.2 mm     Days with significant stubble moisture: 24

16 June

23 June

30 June

0% spore released - blackspot risk high

0% spore released - blackspot risk high

0% spore released - blackspot risk high

Do not sow – high yield loss for late sowing

Do not sow – high yield loss for late sowing

Do not sow – high yield loss for late sowing

Gairdner

Rainfall to date: 124.3 mm   Days with significant stubble moisture: 60

16 June

23 June

30 June

75% spore released - blackspot risk low

82% spore released - blackspot risk low

90% spore released - blackspot risk low

Sow

Do not sow – high yield loss for late sowing

Do not sow – high yield loss for late sowing

Grass Patch

Rainfall to date: 60.3 mm     Days with significant stubble moisture: 43

16 June

23 June

30 June

38% spore released - blackspot risk medium

48% spore released - blackspot risk medium

64% spore released - blackspot risk low

Sow

Sow

Sow

Hillman

Rainfall to date: 102.4 mm   Days with significant stubble moisture: 40

16 June

23 June

30 June

31% spore released - blackspot risk medium

41% spore released - blackspot risk medium

57% spore released - blackspot risk medium

Sow

Sow

Sow

Jacup

Rainfall to date: 128 mm      Days with significant stubble moisture: 65

16 June

23 June

30 June

83% spore released - blackspot risk low

88% spore released - blackspot risk low

94% spore released - blackspot risk low

Sow

Do not sow – high yield loss for late sowing

Do not sow – high yield loss for late sowing

Katanning

Rainfall to date: 120.4 mm   Days with significant stubble moisture: 53

16 June

23 June

30 June

62% spore released - blackspot risk low

70% spore released - blackspot risk low

82% spore released - blackspot risk low

Sow

Do not sow – high yield loss for late sowing

Do not sow – high yield loss for late sowing

Kojonup

Rainfall to date: 157.6 mm   Days with significant stubble moisture: 50

16 June

23 June

30 June

55% spore released - blackspot risk medium

70% spore released - blackspot risk low

82% spore released - blackspot risk low

Sow

Sow

Sow

Kondinin

Rainfall to date: 61.9 mm     Days with significant stubble moisture: 31

16 June

23 June

30 June

13% spore released - blackspot risk high

21% spore released - blackspot risk high

36% spore released - blackspot risk medium

Do not sow – high yield loss for late sowing

Do not sow – high yield loss for late sowing

Do not sow – high yield loss for late sowing

Kulin

Rainfall to date: 62.2 mm     Days with significant stubble moisture: 40

16 June

23 June

30 June

31% spore released - blackspot risk medium

41% spore released - blackspot risk medium

57% spore released - blackspot risk medium

Sow

Do not sow – high yield loss for late sowing

Do not sow – high yield loss for late sowing

Lake King

Rainfall to date: 70.9 mm     Days with significant stubble moisture: 37

16 June

23 June

30 June

25% spore released - blackspot risk high

34% spore released - blackspot risk medium

50% spore released - blackspot risk medium

Do not sow – high yield loss for late sowing

Do not sow – high yield loss for late sowing

Do not sow – high yield loss for late sowing

Merredin

Rainfall to date: 72.2 mm     Days with significant stubble moisture: 29

16 June

23 June

30 June

10% spore released - blackspot risk high

17% spore released - blackspot risk high

31% spore released - blackspot risk medium

Do not sow – high yield loss for late sowing

Do not sow – high yield loss for late sowing

Do not sow – high yield loss for late sowing

Mingenew

Rainfall to date: 80.6 mm     Days with significant stubble moisture: 14

16 June

23 June

30 June

0% spore released - blackspot risk high

1% spore released - blackspot risk high

6% spore released - blackspot risk high

Do not sow – high yield loss for late sowing

Do not sow – high yield loss for late sowing

Do not sow – high yield loss for late sowing

Moora North West

Rainfall to date: 94.8 mm     Days with significant stubble moisture: 28

16 June

23 June

30 June

9% spore released - blackspot risk high

17% spore released - blackspot risk high

31% spore released - blackspot risk medium

Do not sow – high yield loss for late sowing

Do not sow – high yield loss for late sowing

Do not sow – high yield loss for late sowing

Mount Howick

Rainfall to date: 102.8 mm   Days with significant stubble moisture: 41

16 June

23 June

30 June

34% spore released - blackspot risk medium

50% spore released - blackspot risk medium

66% spore released - blackspot risk low

Sow

Sow

Sow

Mt Barker

Rainfall to date: 201.1 mm   Days with significant stubble moisture: 80

16 June

23 June

30 June

97% spore released - blackspot risk low

99% spore released - blackspot risk low

100% spore released - blackspot risk low

Sow

Sow

Sow

Mullewa

Rainfall to date: 83.3 mm     Days with significant stubble moisture: 24

16 June

23 June

30 June

4% spore released - blackspot risk high

9% spore released - blackspot risk high

21% spore released - blackspot risk high

Do not sow – high yield loss for late sowing

Do not sow – high yield loss for late sowing

Do not sow – high yield loss for late sowing

Narrogin

Rainfall to date: 122.6 mm   Days with significant stubble moisture: 56

16 June

23 June

30 June

68% spore released - blackspot risk low

77% spore released - blackspot risk low

87% spore released - blackspot risk low

Sow

Sow

Sow

Newdegate

Rainfall to date: 61.9 mm     Days with significant stubble moisture: 43

16 June

23 June

30 June

38% spore released - blackspot risk medium

48% spore released - blackspot risk medium

64% spore released - blackspot risk low

Do not sow – high yield loss for late sowing

Do not sow – high yield loss for late sowing

Do not sow – high yield loss for late sowing

Northam

Rainfall to date: 86 mm        Days with significant stubble moisture: 41

16 June

23 June

30 June

34% spore released - blackspot risk medium

43% spore released - blackspot risk medium

59% spore released - blackspot risk medium

Sow

Do not sow – high yield loss for late sowing

Do not sow – high yield loss for late sowing

Pingrup

Rainfall to date: 63.6 mm     Days with significant stubble moisture: 45

16 June

23 June

30 June

43% spore released - blackspot risk medium

53% spore released - blackspot risk medium

68% spore released - blackspot risk low

Do not sow – high yield loss for late sowing

Do not sow – high yield loss for late sowing

Do not sow – high yield loss for late sowing

Salmon Gums

Rainfall to date: 68.2 mm     Days with significant stubble moisture: 37

16 June

23 June

30 June

25% spore released - blackspot risk high

34% spore released - blackspot risk medium

50% spore released - blackspot risk medium

Do not sow – high yield loss for late sowing

Do not sow – high yield loss for late sowing

Do not sow – high yield loss for late sowing

Scaddan

Rainfall to date: 84.2 mm     Days with significant stubble moisture: 48

16 June

23 June

30 June

50% spore released - blackspot risk medium

59% spore released - blackspot risk medium

74% spore released - blackspot risk low

Sow

Do not sow – high yield loss for late sowing

Do not sow – high yield loss for late sowing

Tammin

Rainfall to date: 83.2 mm     Days with significant stubble moisture: 43

16 June

23 June

30 June

38% spore released - blackspot risk medium

48% spore released - blackspot risk medium

64% spore released - blackspot risk low

Do not sow – high yield loss for late sowing

Do not sow – high yield loss for late sowing

Do not sow – high yield loss for late sowing

Toodyay

Rainfall to date: 105.9 mm   Days with significant stubble moisture: 45

16 June

23 June

30 June

43% spore released - blackspot risk medium

55% spore released - blackspot risk medium

70% spore released - blackspot risk low

Sow

Do not sow – high yield loss for late sowing

Do not sow – high yield loss for late sowing

Contact information

Jean Galloway
+61 (0)8 9690 2172