Field pea blackspot sowing guide for Western Australia – 28 May 2018

Page last updated: Tuesday, 29 May 2018 - 2:44pm

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 2018 to 28 May 2018 from the nearest weather station.

Key to blackspot severity scores

Percentage yield loss (in years) for different levels of blackspot risk scenarios
Blackspot risk Five out of 10 years Three out of 10 years One out of 10 years
Low 2 5 15
Medium 20 25 35
High 25 30 50

Bencubbin

Rainfall to date: 65.1mm. Days with significant stubble moisture: 12

27 May 3 June 10 June
0% spore released - blackspot risk high 1% spore released - blackspot risk high 6% spore released - blackspot risk high
Do not sow Do not sow Do not sow

Boyup Brook

Rainfall to date: 143.8mm. Days with significant stubble moisture: 37

27 May 3 June 10 June
25% spore released - blackspot risk high 41% spore released - blackspot risk medium 57% spore released - blackspot risk medium
Do not sow Do not sow Sow – do not sow dry

Cunderdin

Rainfall to date: 69.8mm. Days with significant stubble moisture: 26

27 May 3 June 10 June
6% spore released - blackspot risk high 17% spore released - blackspot risk high 31% spore released - blackspot risk medium
Do not sow Do not sow Do not sow

Dowerin

Rainfall to date: 68mm. Days with significant stubble moisture: 20

27 May 3 June 10 June
2% spore released - blackspot risk high 7% spore released - blackspot risk high 19% spore released - blackspot risk high
Do not sow Do not sow Do not sow

Katanning

Rainfall to date: 96.4mm. Days with significant stubble moisture: 32

26 May 2 June 9 June
15% spore released - blackspot risk high 29% spore released - blackspot risk high 46% spore released - blackspot risk medium
Do not sow Do not sow Sow – do not sow dry

Kojonup

Rainfall to date: 98.1mm. Days with significant stubble moisture: 40

27 May 3 June 10 June
31% spore released - blackspot risk medium 48% spore released - blackspot risk medium 64% spore released - blackspot risk low
Do not sow Sow – do not sow dry Sow – do not sow dry

Kondinin

Rainfall to date: 104.3mm. Days with significant stubble moisture: 39

27 May 3 June 10 June
29% spore released - blackspot risk high 46% spore released - blackspot risk medium 62% spore released - blackspot risk low
Sow – do not sow dry Sow – do not sow dry Sow – do not sow dry

Lake King

Rainfall to date: 77.3mm. Days with significant stubble moisture: 45

27 May 3 June 10 June
43% spore released - blackspot risk medium 59% spore released - blackspot risk medium 74% spore released - blackspot risk low
Sow – do not sow dry Sow – do not sow dry Sow – do not sow dry

Merredin

Rainfall to date: 67.6mm. Days with significant stubble moisture: 25

27 May 3 June 10 June
5% spore released - blackspot risk high 15% spore released - blackspot risk high 29% spore released - blackspot risk high
Do not sow Sow – do not sow dry Sow – do not sow dry

Mingenew

Rainfall to date: 122.3mm. Days with significant stubble moisture: 20

27 May 3 June 10 June
2% spore released - blackspot risk high 7% spore released - blackspot risk high 19% spore released - blackspot risk high
Do not sow Do not sow Do not sow

Moora

Rainfall to date: 116.3mm. Days with significant stubble moisture: 32

27 May 3 June 10 June
15% spore released - blackspot risk high 29% spore released - blackspot risk high 46% spore released - blackspot risk medium
Do not sow Do not sow Do not sow

Mount Howick

Rainfall to date: 135.6mm. Days with significant stubble moisture: 60

26 May 2 June 9 June
75% spore released - blackspot risk low 86% spore released - blackspot risk low 93% spore released - blackspot risk low
Sow – do not sow dry Sow – do not sow dry Sow – do not sow dry

Mt Barker

Rainfall to date: 86.2mm. Days with significant stubble moisture: 54

27 May 3 June 10 June
64% spore released - blackspot risk low 77% spore released - blackspot risk low 87% spore released - blackspot risk low
Sow – do not sow dry Sow – do not sow dry Sow – do not sow dry

Mullewa

Rainfall to date: 106mm. Days with significant stubble moisture: 24

27 May 3 June 10 June
4% spore released - blackspot risk high 13% spore released - blackspot risk high 27% spore released - blackspot risk high
Do not sow Do not sow Do not sow

Newdegate

Rainfall to date: 56.8mm. Days with significant stubble moisture: 38

27 May 3 June 10 June
27% spore released - blackspot risk high 43% spore released - blackspot risk medium 59% spore released - blackspot risk medium
Sow – do not sow dry Sow – do not sow dry Sow – do not sow dry

Northam

Rainfall to date: 119.5mm. Days with significant stubble moisture: 23

27 May 3 June 10 June
3% spore released - blackspot risk high 12% spore released - blackspot risk high 25% spore released - blackspot risk high
Do not sow Do not sow Do not sow

Pingrup

Rainfall to date: 55.9mm. Days with significant stubble moisture: 32

27 May 3 June 10 June
15% spore released - blackspot risk high 29% spore released - blackspot risk high 46% spore released - blackspot risk medium
Do not sow Sow - do not sow dry Sow - do not sow dry

Salmon Gums

Rainfall to date: 159.6mm. Days with significant stubble moisture: 46

26 May 2 June 9 June
46% spore released - blackspot risk medium 62% spore released - blackspot risk low 75% spore released - blackspot risk low
Sow – do not sow dry Sow – do not sow dry Sow – do not sow dry

Scaddan

Rainfall to date: 200.4mm. Days with significant stubble moisture: 43

26 May 2 June 9 June
38% spore released - blackspot risk medium 55% spore released - blackspot risk medium 70% spore released - blackspot risk low
Sow – do not sow dry Sow – do not sow dry Sow – do not sow dry

Tammin

Rainfall to date: 64.2mm. Days with significant stubble moisture: 26

27 May 3 June 10 June
6% spore released - blackspot risk high 17% spore released - blackspot risk high 31% spore released - blackspot risk medium
Do not sow Do not sow Do not sow

Toodyay

Rainfall to date: 148.8mm. Days with significant stubble moisture: 24

27 May 3 June 10 June
4% spore released - blackspot risk high 13% spore released - blackspot risk high 27% spore released - blackspot risk high
Do not sow Do not sow Do not sow

Contact information

Jean Galloway
+61 (0)8 9690 2172
Mark Seymour
+61 (0)8 9083 1143

Author

Kawsar Salam

Funding bodies