Field pea blackspot management guide for Western Australia - 7 June 2021

Page last updated: Wednesday, 9 June 2021 - 12:14pm

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 2021 to 6th June 2021 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

Rainfall to date: 199.4 mm    Days with significant stubble moisture: 39

6 June

13 June

20 June

29% spores released - blackspot risk high

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

Boyup Brook

Rainfall to date: 288.3 mm     Days with significant stubble moisture: 59

6 June

13 June

20 June

74% spores released - blackspot risk low

85% spores released - blackspot risk low

92% spores released - blackspot risk low

Sow - do not sow dry

Sow - do not sow dry

Sow - do not sow dry

Cunderdin

Rainfall to date: 184.5 mm    Days with significant stubble moisture: 55

6 June

13 June

20 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

Dalwallinu

Rainfall to date: 268.9 mm    Days with significant stubble moisture: 51

6 June

13 June

20 June

57% 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

Too late to sow

Darkan

Rainfall to date: 263.5 mm    Days with significant stubble moisture: 68

6 June

13 June

20 June

87% spores released - blackspot risk low

94% 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

Dowerin

Rainfall to date: 160.7 mm    Days with significant stubble moisture: 45

6 June

13 June

20 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

Gairdner

Rainfall to date: 323.5 mm    Days with significant stubble moisture: 64

6 June

13 June

20 June

82% spores released - blackspot risk low

90% spores released - blackspot risk low

96% spores released - blackspot risk low

Sow - do not sow dry

Sow - do not sow dry

Sow - do not sow dry

Grass Patch

Rainfall to date: 172.4 mm    Days with significant stubble moisture: 86

6 June

13 June

20 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

Jacup

Rainfall to date: 280.1 mm    Days with significant stubble moisture: 74

6 June

13 June

20 June

93% spores released - blackspot risk low

97% spores released - blackspot risk low

99% spores released - blackspot risk low

Sow - do not sow dry

Sow - do not sow dry

Sow - do not sow dry

Katanning

Rainfall to date: 213.4 mm    Days with significant stubble moisture: 64

6 June

13 June

20 June

82% spores released - blackspot risk low

90% spores released - blackspot risk low

96% spores released - blackspot risk low

Sow - do not sow dry

Sow - do not sow dry

Sow - do not sow dry

Kojonup

Rainfall to date: 314 mm    Days with significant stubble moisture: 64

6 June

13 June

20 June

82% spores released - blackspot risk low

90% spores released - blackspot risk low

96% spores released - blackspot risk low

Sow - do not sow dry

Sow - do not sow dry

Sow - do not sow dry

Kondinin

Rainfall to date: 186.6 mm    Days with significant stubble moisture: 59

6 June

13 June

20 June

74% spores released - blackspot risk low

85% spores released - blackspot risk low

92% spores released - blackspot risk low

Sow - do not sow dry

Sow - do not sow dry

Sow - do not sow dry

Kulin

Rainfall to date: 118.2 mm    Days with significant stubble moisture: 31

6 June

13 June

20 June

13% spores released - blackspot risk high

27% spores released - blackspot risk high

43% spores released - blackspot risk medium

Do not sow

Do not sow

Sow - do not sow dry

Lake Camm

Rainfall to date: 197.3 mm    Days with significant stubble moisture: 61

6 June

13 June

20 June

77% 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

Merredin

Rainfall to date: 168.5 mm    Days with significant stubble moisture: 49

6 June

13 June

20 June

53% spores released - blackspot risk medium

68% spores released - blackspot risk low

80% spores released - blackspot risk low

Sow - do not sow dry

Sow - do not sow dry

Sow - do not sow dry

Mingenew

Rainfall to date: 181.5 mm    Days with significant stubble moisture: 47

6 June

13 June

20 June

48% spores released - blackspot risk medium

64% spores released - blackspot risk low

77% spores released - blackspot risk low

Sow - do not sow dry

Sow - do not sow dry

Sow - do not sow dry

Moora North West

Rainfall to date: 224.8 mm    Days with significant stubble moisture: 58

6 June

13 June

20 June

72% spores released - blackspot risk low

83% spores released - blackspot risk low

91% spores released - blackspot risk low

Sow - do not sow dry

Sow - do not sow dry

Sow - do not sow dry

Mount Howick

Rainfall to date: 175.6 mm    Days with significant stubble moisture: 75

6 June

13 June

20 June

94% spores released - blackspot risk low

97% spores released - blackspot risk low

99% spores released - blackspot risk low

Sow - do not sow dry

Sow - do not sow dry

Sow - do not sow dry

Mt Barker

Rainfall to date: 368.4 mm    Days with significant stubble moisture: 106

6 June

13 June

20 June

100% 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

Mullewa

Rainfall to date: 222.8 mm    Days with significant stubble moisture: 49

6 June

13 June

20 June

53% spores released - blackspot risk medium

68% spores released - blackspot risk low

80% spores released - blackspot risk low

Sow - do not sow dry

Sow - do not sow dry

Too late to sow

Narrogin

Rainfall to date: 194.2 mm    Days with significant stubble moisture: 52

6 June

13 June

20 June

59% spores released - blackspot risk medium

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

Newdegate

Rainfall to date: 162 mm    Days with significant stubble moisture: 58

6 June

13 June

20 June

72% spores released - blackspot risk low

83% spores released - blackspot risk low

91% spores released - blackspot risk low

Sow - do not sow dry

Sow - do not sow dry

Sow - do not sow dry

Northam

Rainfall to date: 287.5 mm    Days with significant stubble moisture: 48

6 June

13 June

20 June

50% spores released - blackspot risk medium

66% spores released - blackspot risk low

79% spores released - blackspot risk low

Sow - do not sow dry

Sow - do not sow dry

Sow - do not sow dry

Pingrup

Rainfall to date: 138.5 mm    Days with significant stubble moisture: 41

6 June

13 June

20 June

34% spores released - blackspot risk medium

50% spores released - blackspot risk medium

66% spores released - blackspot risk low

Do not sow

Sow - do not sow dry

Sow - do not sow dry

Salmon Gums

Rainfall to date: 201.2 mm    Days with significant stubble moisture: 76

6 June

13 June

20 June

94% spores released - blackspot risk low

98% spores released - blackspot risk low

99% spores released - blackspot risk low

Sow - do not sow dry

Sow - do not sow dry

Sow - do not sow dry

Scaddan

Rainfall to date: 198.8 mm    Days with significant stubble moisture: 92

6 June

13 June

20 June

100% 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

Tammin

Rainfall to date: 185.1 mm    Days with significant stubble moisture: 47

6 June

13 June

20 June

48% spores released - blackspot risk medium

64% spores released - blackspot risk low

77% spores released - blackspot risk low

Sow - do not sow dry

Sow - do not sow dry

Sow - do not sow dry

Toodyay

Rainfall to date: 271.7 mm    Days with significant stubble moisture: 56

6 June

13 June

20 June

68% spores released - blackspot risk low

80% spores released - blackspot risk low

89% spores released - blackspot risk low

Sow - do not sow dry

Sow - do not sow dry

Sow - do not sow dry

Contact information

Jean Galloway
+61 (0)8 9690 2172