Field pea blackspot sowing guide for Western Australia – 20 June 2017

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 DAFWA's Blackspot Manager model using weather data from January to 19 June 2017 from the nearest weather station.

Boyup Brook

19 June

26 June

3 July

68% spore released – blackspot risk low

80% spore released – blackspot risk low

89% spore released – blackspot risk low

Sow - do not sow dry

Sow - do not sow dry

Sow - do not sow dry

Dowerin 

19 June

26 June

3 July

36% spore released – blackspot risk medium

50% spore released – blackspot risk medium

66% spore released – blackspot risk low

Don’t sow – High yield loss for late sowing

Don’t sow – High yield loss for late sowing

Don’t sow – High yield loss for late sowing

Katanning 

19 June

26 June

3 July

57% spore released – blackspot risk medium

70% spore released – blackspot risk low

82% spore released – blackspot risk low

Sow - do not sow dry

Don’t sow – high yield loss for late sowing

Don’t sow – high yield loss for late sowing

Kojonup

19 June

26 June

3 July

25% spore released – blackspot risk high

38% spore released – blackspot risk medium

55% spore released – blackspot risk medium

Do not sow

Don’t sow – high yield loss for late sowing

Don’t sow – high yield loss for late sowing

Kondinin

19 June

26 June

3 July

80% spore released – blackspot risk low

89% spore released – blackspot risk low

95% spore released – blackspot risk low

Don’t sow – high yield loss for late sowing

Don’t sow – high yield loss for late sowing

Don’t sow – high yield loss for late sowing

Lake King

19 June

26 June

3 July

74% spore released – blackspot risk low

85% spore released – blackspot risk low

92% spore released – blackspot risk low

Don’t sow – high yield loss for late sowing

Don’t sow – high yield loss for late sowing

Don’t sow – high yield loss for late sowing

Merredin 

19 June

26 June

3 July

72% spore released – blackspot risk low

82% spore released – blackspot risk low

90% spore released – blackspot risk low

Don’t sow – high yield loss for late sowing

Don’t sow – high yield loss for late sowing

Don’t sow – high yield loss for late sowing

Mingenew 

19 June

26 June

3 July

17% spore released – blackspot risk high

29% spore released – blackspot risk high

46% spore released – blackspot risk medium

Don’t sow – high yield loss for late sowing

Don’t sow – high yield loss for late sowing

Don’t sow – high yield loss for late sowing

Moora 

19 June

26 June

3 July

55% spore released – blackspot risk medium

70% spore released – blackspot risk low

82% spore released – blackspot risk low

Don’t sow – high yield loss for late sowing

Don’t sow – high yield loss for late sowing

Don’t sow – high yield loss for late sowing

Mount Barker 

19 June

26 June

3 July

87% spore released – blackspot risk low

93% spore released – blackspot risk low

97% spore released – blackspot risk low

Sow – do not sow dry

Sow – do not sow dry

Sow – do not sow dry

Mullewa 

19 June

26 June

3 July

50% spore released – blackspot risk is medium

64% spore released – blackspot risk is low

77% spore released – blackspot risk is low

Don’t sow – high yield loss for late sowing

Don’t sow – high yield loss for late sowing

Don’t sow – high yield loss for late sowing

Newdegate 

19 June

26 June

3 July

38% spore released – blackspot risk is medium

53% spore released – blackspot risk is medium

68% spore released – blackspot risk is low

Don’t sow – high yield loss for late sowing

Don’t sow – high yield loss for late sowing

Don’t sow – high yield loss for late sowing

Northam 

19 June

26 June

3 July

55% spore released – blackspot risk is medium

70% spore released – blackspot risk is low

82% spore released – blackspot risk is low

Sow – do not sow dry

Don’t sow – high yield loss for late sowing

Don’t sow – high yield loss for late sowing

Pingrup

19 June

26 June

3 July

53% spore released – blackspot risk medium

66% spore released – blackspot risk low

79% spore released – blackspot risk low

Don’t sow – high yield loss for late sowing

Don’t sow – high yield loss for late sowing

Don’t sow – high yield loss for late sowing

Salmon Gums 

19 June

26 June

3 July

99% spore released – blackspot risk is low

100% spore released – blackspot risk is low

100% spore released – blackspot risk is low

Don’t sow – high yield loss for late sowing

Don’t sow – high yield loss for late sowing

Don’t sow – high yield loss for late sowing

Scaddan 

19 June

26 June

3 July

74% spore released – blackspot risk low

83% spore released – blackspot risk low

91% spore released – blackspot risk low

Don’t sow – high yield loss for late sowing

Don’t sow – high yield loss for late sowing

Don’t sow – high yield loss for late sowing

Key to blackspot severity scores 

Table 1 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

Contact information

Mark Seymour
+61 (0)8 9083 1143
Jean Galloway
+61 (0)8 9690 2172
Page last updated: Thursday, 22 June 2017 - 11:24am

Author

Kawsar Salam

Funding bodies