Field pea blackspot sowing guide for Western Australia – 12 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 11 June 2017 from the nearest weather station.

Boyup Brook

11 June

18 June

25 June

66% spore released – Blackspot risk low

75% spore released – Blackspot risk low

86% spore released – Blackspot risk low

Sow - do not sow dry

Sow - do not sow dry

Sow - do not sow dry

Dowerin 

11 June

18 June

25 June

36% spore released – blackspot risk medium

48% spore released – blackspot risk medium

64% spore released – blackspot risk low

Do not sow

Don’t sow – High yield loss for late sowing

Don’t sow – High yield loss for late sowing

Katanning 

11 June

18 June

25 June

57% spore released – blackspot risk medium

68% spore released – blackspot risk low

80% spore released – blackspot risk low

Sow - do not sow dry

Sow - do not sow dry

Don’t sow – High yield loss for late sowing

Kojonup

11 June

18 June

25 June

25% spore released – blackspot risk high

36% spore released – blackspot risk medium

53% spore released – blackspot risk medium

Do not sow

Do not sow

Don’t sow – High yield loss for late sowing

Kondinin

11 June

18 June

25 June

74% spore released – blackspot risk low

82% spore released – blackspot risk low

90% 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

Lake King

11 June

18 June

25 June

66% spore released – Blackspot risk low

75% spore released – Blackspot risk low

86% 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

Merredin 

11 June

18 June

25 June

75% spore released – blackspot risk low

85% spore released – blackspot risk low

92% 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

Mingenew 

11 June

18 June

25 June

36% spore released – blackspot risk medium

48% spore released – blackspot risk medium

64% spore released – blackspot risk low

Do not sow

Don’t sow – High yield loss for late sowing

Don’t sow – High yield loss for late sowing

Moora 

11 June

18 June

25 June

41% spore released – blackspot risk medium

53% spore released – blackspot risk medium

68% spore released – blackspot risk low

Do not sow

Don’t sow – High yield loss for late sowing

Don’t sow – High yield loss for late sowing

Mount Barker 

11 June

18 June

25 June

87% spore released – blackspot risk low

92% 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 

11 June

18 June

25 June

50% spore released – blackspot risk is medium

62% spore released – blackspot risk is low

75% 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

Newdegate 

11 June

18 June

25 June

38% spore released – blackspot risk is medium

50% spore released – blackspot risk is medium

66% 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

Northam 

11 June

18 June

25 June

41% spore released – blackspot risk is medium

53% spore released – blackspot risk is medium

68% spore released – blackspot risk is low

Sow – do not sow dry

Sow – do not sow dry

Don’t sow – High yield loss for late sowing

Pingrup

11 June

18 June

25 June

53% spore released – blackspot risk medium

64% spore released – blackspot risk low

77% 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

Salmon Gums 

11 June

18 June

25 June

99% spore released – blackspot risk is low

99% spore released – blackspot risk is low

100% 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

Scaddan 

11 June

18 June

25 June

74% spore released – blackspot risk low

82% spore released – blackspot risk low

90% 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

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

Ian Pritchard
+61 (0)8 9368 3515
Mark Seymour
+61 (0)8 9083 1143
Jean Galloway
+61 (0)8 9690 2172
Page last updated: Friday, 16 June 2017 - 12:17pm

Author

Kawsar Salam

Funding bodies