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 1st 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: 119.6 mm. Days with significant stubble moisture: 53
| 1 June | 8 June | 15 June |
|---|---|---|
| 62% 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 |
Boyup Brook
Rainfall to date: 151 mm. Days with significant stubble moisture: 48
| 1 June | 8 June | 15 June |
|---|---|---|
| 50% spore released - blackspot risk medium | 66% spore released - blackspot risk low | 79% spore released - blackspot risk low |
| Sow – do not sow dry | Sow – do not sow dry | Sow – do not sow dry |
Cunderdin
Rainfall to date: 129.2 mm. Days with significant stubble moisture: 30
| 1 June | 8 June | 15 June |
|---|---|---|
| 12% spore released - blackspot risk high | 25% spore released - blackspot risk high | 41% spore released - blackspot risk medium |
| Do not sow | Do not sow | Do not sow |
Dalwallinu
Rainfall to date: 131 mm. Days with significant stubble moisture: 38
| 1 June | 8 June | 15 June |
|---|---|---|
| 27% spore released - blackspot risk high | 43% spore released - blackspot risk medium | 59% spore released - blackspot risk medium |
| Do not sow | Sow- do not sow dry | Sow- do not sow dry |
Dowerin
Rainfall to date: 167 mm. Days with significant stubble moisture: 40
| 1 June | 8 June | 15 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 |
Gairdner
Rainfall to date: 93.1 mm. Days with significant stubble moisture: 60
| 1 June | 8 June | 15 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 |
Grass Patch
Rainfall to date: 110 mm. Days with significant stubble moisture: 67
| 1 June | 8 June | 15 June |
|---|---|---|
| 86% 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 |
Hillman
Rainfall to date: 118.1 mm. Days with significant stubble moisture: 43
| 1 June | 8 June | 15 June |
|---|---|---|
| 38% spore released - blackspot risk medium | 55% spore released - blackspot risk medium | 70% spore released - blackspot risk low |
| Do not sow | Sow – do not sow dry | Sow – do not sow dry |
Jacup
Rainfall to date: 142.2 mm. Days with significant stubble moisture: 61
| 1 June | 8 June | 15 June |
|---|---|---|
| 77% spore released - blackspot risk low | 87% spore released - blackspot risk low | 94% spore released - blackspot risk low |
| Sow – do not sow dry | Sow – do not sow dry | Sow – do not sow dry |
Katanning
Rainfall to date: 128.6 mm. Days with significant stubble moisture: 39
| 1 June | 8 June | 15 June |
|---|---|---|
| 29% spore released - blackspot risk high | 46% spore released - blackspot risk medium | 62% spore released - blackspot risk low |
| Do not sow | Sow- do not sow dry | Sow- do not sow dry |
Kojonup
Rainfall to date: 126.4 mm. Days with significant stubble moisture: 47
| 1 June | 8 June | 15 June |
|---|---|---|
| 48% spore released - blackspot risk medium | 64% spore released - blackspot risk low | 77% spore released - blackspot risk low |
| Sow – do not sow dry | Sow – do not sow dry | Sow – do not sow dry |
Kondinin
Rainfall to date: 110.9 mm. Days with significant stubble moisture: 55
| 1 June | 8 June | 15 June |
|---|---|---|
| 66% spore released - blackspot risk low | 79% spore released - blackspot risk low | 88% spore released - blackspot risk low |
| Sow – do not sow dry | Sow – do not sow dry | Sow – do not sow dry |
Kulin
Rainfall to date: 136.7 mm. Days with significant stubble moisture: 55
| 1 June | 8 June | 15 June |
|---|---|---|
| 66% spore released - blackspot risk low | 79% spore released - blackspot risk low | 88% 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: 110.1 mm. Days with significant stubble moisture: 60
| 1 June | 8 June | 15 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 |
Merredin
Rainfall to date: 122.5 mm. Days with significant stubble moisture: 42
| 1 June | 8 June | 15 June |
|---|---|---|
| 36% spore released - blackspot risk medium | 53% spore released - blackspot risk medium | 68% spore released - blackspot risk low |
| Sow –do not sow dry | Sow –do not sow dry | Sow –do not sow dry |
Mingenew
Rainfall to date: 131.5 mm. Days with significant stubble moisture: 31
| 1 June | 8 June | 15 June |
|---|---|---|
| 13% spore released - blackspot risk high | 27% spore released - blackspot risk high | 43% spore released - blackspot risk medium |
| Do not sow | Do not sow | Do not sow |
Moora North West
Rainfall to date: 119.9 mm. Days with significant stubble moisture: 42
| 1 June | 8 June | 15 June |
|---|---|---|
| 36% spore released - blackspot risk medium | 53% spore released - blackspot risk medium | 68% spore released - blackspot risk low |
| Do not sow | Sow- do not sow dry | Sow- do not sow dry |
Mount Howick
Rainfall to date: 132.4 mm. Days with significant stubble moisture: 59
| 1 June | 8 June | 15 June |
|---|---|---|
| 74% spore released - blackspot risk low | 85% spore released - blackspot risk low | 92% 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: 178.5 mm. Days with significant stubble moisture: 93
| 1 June | 8 June | 15 June |
|---|---|---|
| 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: 111.4 mm. Days with significant stubble moisture: 41
| 1 June | 8 June | 15 June |
|---|---|---|
| 34% spore released - blackspot risk medium | 41% spore released - blackspot risk medium | 57% spore released - blackspot risk medium |
| Do not sow | Sow - do not sow dry | Sow – do not sow dry |
Narrogin
Rainfall to date: 122.9 mm. Days with significant stubble moisture: 49
| 1 June | 8 June | 15 June |
|---|---|---|
| 53% 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 | Sow – do not sow dry |
Newdegate
Rainfall to date: 96.6 mm. Days with significant stubble moisture: 51
| 1 June | 8 June | 15 June |
|---|---|---|
| 57% spore released - blackspot risk medium | 72% spore released - blackspot risk low | 83% spore released - blackspot risk low |
| Sow – do not sow dry | Sow – do not sow dry | Sow – do not sow dry |
Northam
Rainfall to date: 97.8 mm. Days with significant stubble moisture: 43
| 1 June | 8 June | 15 June |
|---|---|---|
| 38% spore released - blackspot risk medium | 55% spore released - blackspot risk medium | 70% spore released - blackspot risk low |
| Do not sow | Sow – do not sow dry | Sow – do not sow dry |
Pingrup
Rainfall to date: 94 mm. Days with significant stubble moisture: 54
| 1 June | 8 June | 15 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 |
Salmon Gums
Rainfall to date: 128.2 mm. Days with significant stubble moisture: 67
| 1 June | 8 June | 15 June |
|---|---|---|
| 86% 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 |
Scaddan
Rainfall to date: 126.8 mm. Days with significant stubble moisture: 66
| 1 June | 8 June | 15 June |
|---|---|---|
| 85% 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 |
Tammin
Rainfall to date: 109.2 mm. Days with significant stubble moisture: 35
| 1 June | 8 June | 15 June |
|---|---|---|
| 21% spore released - blackspot risk high | 36% spore released - blackspot risk medium | 53% spore released - blackspot risk medium |
| Do not sow | Do not sow | Sow – do not sow dry |
Toodyay
Rainfall to date: 99.7 mm. Days with significant stubble moisture: 47
| 1 June | 8 June | 15 June |
|---|---|---|
| 48% spore released - blackspot risk medium | 64% spore released - blackspot risk low | 77% spore released - blackspot risk low |
| Sow- do not sow dry | Sow – do not sow dry | Sow – do not sow dry |