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. 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 1st January 2020 to 22nd June 2020 from the nearest weather station.
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.
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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 [1].
Key to blackspot severity scores
| 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: 140.4 mm. Days with significant stubble moisture: 68
| 22 June | 29 June | 6 July |
|---|---|---|
| 87% spore released - blackspot risk low | 92% spore released - blackspot risk low | 97% spore released - blackspot risk low |
| Sow – do not sow dry | Sow - getting too late to sow | Getting too late to sow |
Boyup Brook
Rainfall to date: 219.7 mm. Days with significant stubble moisture: 63
| 22 June | 29 June | 6 July |
|---|---|---|
| 80% spore released - blackspot risk low | 87% spore released - blackspot risk low | 94% spore released - blackspot risk low |
| Sow – do not sow dry | Sow - getting too late to sow | Getting too late to sow |
Cunderdin
Rainfall to date: 149.4 mm. Days with significant stubble moisture: 45
| 22 June | 29 June | 6 July |
|---|---|---|
| 43% spore released - blackspot risk medium | 55% spore released - blackspot risk medium | 70% spore released - blackspot risk low |
| Sow – do not sow dry | Sow - getting too late to sow | Getting too late to sow |
Dalwallinu
Rainfall to date: 151.6 mm. Days with significant stubble moisture: 53
| 22 June | 29 June | 6 July |
|---|---|---|
| 62% spore released - blackspot risk low | 72% spore released - blackspot risk low | 83% spore released - blackspot risk low |
| Too late to sow – after 20th June | Too late to sow | Too late to sow |
Dowerin
Rainfall to date: 185.2 mm. Days with significant stubble moisture: 51
| 22 June | 29 June | 6 July |
|---|---|---|
| 57% spore released - blackspot risk medium | 68% spore released - blackspot risk low | 80% spore released - blackspot risk low |
| Sow – do not sow dry | Sow - getting too late to sow | Getting too late to sow |
Gairdner
Rainfall to date: 102.9 mm. Days with significant stubble moisture: 69
| 22 June | 29 June | 6 July |
|---|---|---|
| 88% spore released - blackspot risk low | 93% spore released - blackspot risk low | 97% spore released - blackspot risk low |
| Sow – do not sow dry | Sow - getting too late to sow | Getting too late to sow |
Grass Patch
Rainfall to date: 117.8 mm. Days with significant stubble moisture: 76
| 22 June | 29 June | 6 July |
|---|---|---|
| 94% spore released - blackspot risk low | 97% spore released - blackspot risk low | 99% spore released - blackspot risk low |
| Sow – do not sow dry | Sow - getting too late to sow | Getting too late to sow |
Hillman
Rainfall to date: 158 mm. Days with significant stubble moisture: 61
| 22 June | 29 June | 6 July |
|---|---|---|
| 77% spore released - blackspot risk low | 85% spore released - blackspot risk low | 92% spore released - blackspot risk low |
| Sow – do not sow dry | Sow - getting too late to sow | Getting too late to sow |
Jacup
Rainfall to date: 158.7 mm. Days with significant stubble moisture: 75
| 22 June | 29 June | 6 July |
|---|---|---|
| 94% spore released - blackspot risk low | 97% spore released - blackspot risk low | 99% spore released - blackspot risk low |
| Sow – do not sow dry | Sow - getting too late to sow | Getting too late to sow |
Katanning
Rainfall to date: 155.4 mm. Days with significant stubble moisture: 56
| 22 June | 29 June | 6 July |
|---|---|---|
| 68% spore released - blackspot risk low | 77% spore released - blackspot risk low | 87% spore released - blackspot risk low |
| Sow – do not sow dry | Sow - getting too late to sow | Getting too late to sow |
Kojonup
Rainfall to date: 155 mm. Days with significant stubble moisture: 64
| 22 June | 29 June | 6 July |
|---|---|---|
| 82% spore released - blackspot risk low | 88% spore released - blackspot risk low | 94% spore released - blackspot risk low |
| Sow – do not sow dry | Sow - getting too late to sow | Getting too late to sow |
Kondinin
Rainfall to date: 127.8 mm. Days with significant stubble moisture: 71
| 22 June | 29 June | 6 July |
|---|---|---|
| 90% spore released - blackspot risk low | 94% spore released - blackspot risk low | 98% spore released - blackspot risk low |
| Sow – do not sow dry | Sow - getting too late to sow | Getting too late to sow |
Kulin
Rainfall to date: 147 mm. Days with significant stubble moisture: 72
| 22 June | 29 June | 6 July |
|---|---|---|
| 91% spore released - blackspot risk low | 95% spore released - blackspot risk low | 98% spore released - blackspot risk low |
| Sow – do not sow dry | Sow - getting too late to sow | Getting too late to sow |
Lake King
Rainfall to date: 130 mm. Days with significant stubble moisture: 71
| 22 June | 29 June | 6 July |
|---|---|---|
| 90% spore released - blackspot risk low | 94% spore released - blackspot risk low | 98% spore released - blackspot risk low |
| Sow – do not sow dry | Sow - getting too late to sow | Getting too late to sow |
Merredin
Rainfall to date: 151.1 mm. Days with significant stubble moisture: 57
| 22 June | 29 June | 6 July |
|---|---|---|
| 70% spore released - blackspot risk low | 79% spore released - blackspot risk low | 88% spore released - blackspot risk low |
| Sow – do not sow dry | Sow - getting too late to sow | Getting too late to sow |
Mingenew
Rainfall to date: 156.3 mm. Days with significant stubble moisture: 46
| 22 June | 29 June | 6 July |
|---|---|---|
| 46% spore released - blackspot risk medium | 57% spore released - blackspot risk medium | 72% spore released - blackspot risk low |
| Sow – do not sow dry | Sow - getting too late to sow | Getting too late to sow |
Moora North West
Rainfall to date: 137.5 mm. Days with significant stubble moisture: 57
| 22 June | 29 June | 6 July |
|---|---|---|
| 70% spore released - blackspot risk low | 79% spore released - blackspot risk low | 88% spore released - blackspot risk low |
| Sow – do not sow dry | Sow - getting too late to sow | Getting too late to sow |
Mount Howick
Rainfall to date: 141.2 mm. Days with significant stubble moisture: 73
| 22 June | 29 June | 6 July |
|---|---|---|
| 92% spore released - blackspot risk low | 96% spore released - blackspot risk low | 98% spore released - blackspot risk low |
| Sow – do not sow dry | Sow - getting too late to sow | Getting too late to sow |
Mt Barker
Rainfall to date: 192.6 mm. Days with significant stubble moisture: 109
| 22 June | 29 June | 6 July |
|---|---|---|
| 100% spore released - blackspot risk low | 100% spore released - blackspot risk low | 100% spore released - blackspot risk low |
| Sow – do not sow dry | Sow – do not sow dry | Sow – do not sow dry |
Mullewa
Rainfall to date: 131.8 mm. Days with significant stubble moisture: 52
| 22 June | 29 June | 6 July |
| 59% spore released - blackspot risk medium | 70% spore released - blackspot risk low | 82% spore released - blackspot risk low |
| Too late to sow – after 20th June | Too late to sow | Too late to sow |
Narrogin
Rainfall to date: 154.7 mm. Days with significant stubble moisture: 64
| 22 June | 29 June | 6 July |
|---|---|---|
| 82% spore released - blackspot risk low | 88% spore released - blackspot risk low | 94% spore released - blackspot risk low |
| Sow – do not sow dry | Sow - getting too late to sow | Getting too late to sow |
Newdegate
Rainfall to date: 119.4 mm. Days with significant stubble moisture: 65
| 22 June | 29 June | 6 July |
|---|---|---|
| 83% spore released - blackspot risk low | 89% spore released - blackspot risk low | 95% spore released - blackspot risk low |
| Sow – do not sow dry | Sow - getting too late to sow | Getting too late to sow |
Northam
Rainfall to date: 117.3 mm. Days with significant stubble moisture: 58
| 22 June | 29 June | 6 July |
|---|---|---|
| 72% spore released - blackspot risk low | 80% spore released - blackspot risk low | 89% spore released - blackspot risk low |
| Sow – do not sow dry | Sow - getting too late to sow | Getting too late to sow |
Pingrup
Rainfall to date: 108.3 mm. Days with significant stubble moisture: 69
| 22 June | 29 June | 6 July |
|---|---|---|
| 88% spore released - blackspot risk low | 93% spore released - blackspot risk low | 97% spore released - blackspot risk low |
| Sow – do not sow dry | Sow - getting too late to sow | Getting too late to sow |
Salmon Gums
Rainfall to date: 137.4 mm. Days with significant stubble moisture: 81
| 22 June | 29 June | 6 July |
|---|---|---|
| 97% spore released - blackspot risk low | 99% spore released - blackspot risk low | 100% spore released - blackspot risk low |
| Sow – do not sow dry | Sow - getting too late to sow | Getting too late to sow |
Scaddan
Rainfall to date: 137.8 mm. Days with significant stubble moisture: 81
| 22 June | 29 June | 6 July |
|---|---|---|
| 97% spore released - blackspot risk low
| 99% spore released - blackspot risk low
| 100% spore released - blackspot risk low
|
| Sow – do not sow dry | Sow - getting too late to sow | Getting too late to sow |
Tammin
Rainfall to date: 134.5 mm. Days with significant stubble moisture: 50
| 22 June | 29 June | 6 July |
|---|---|---|
| 55% spore released - blackspot risk medium | 66% spore released - blackspot risk low | 79% spore released - blackspot risk low |
| Sow – do not sow dry | Sow - getting too late to sow | Getting too late to sow |
Toodyay
Rainfall to date: 127.5 mm. Days with significant stubble moisture: 62
| 22 June | 29 June | 6 July |
|---|---|---|
| 79% spore released - blackspot risk low | 86% spore released - blackspot risk low | 93% spore released - blackspot risk low |
| Sow – do not sow dry | Sow - getting too late to sow | Getting too late to sow |