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 2020 to 27 April 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: 91.7 mm. Days with significant stubble moisture: 34
| 27 Apr | 4 May | 11 May |
|---|---|---|
| 19% spore released - blackspot risk high | 34% spore released - blackspot risk medium | 50% spore released - blackspot risk medium |
| Do not sow | Do not sow | Do not sow |
Boyup Brook
Rainfall to date: 51.9 mm. Days with significant stubble moisture: 29
| 27 Apr | 4 May | 11 May |
|---|---|---|
| 10% spore released - blackspot risk high | 15% spore released - blackspot risk high | 29% spore released - blackspot risk high |
| Do not sow | Do not sow | Do not sow |
Cunderdin
Rainfall to date: 101.6 mm. Days with significant stubble moisture: 22
| 27 Apr | 4 May | 11 May |
|---|---|---|
| 3% spore released - blackspot risk high | 5% spore released - blackspot risk high | 15% spore released - blackspot risk high |
| Do not sow | Do not sow | Do not sow |
Dalwallinu
Rainfall to date: 102.2 mm. Days with significant stubble moisture: 23
| 27 Apr | 4 May | 11 May |
|---|---|---|
| 3% spore released - blackspot risk high | 6% spore released - blackspot risk high | 17% spore released - blackspot risk high |
| Do not sow | Do not sow | Do not sow |
Dowerin
Rainfall to date: 133.5 mm. Days with significant stubble moisture: 27
| 27 Apr | 4 May | 11 May |
|---|---|---|
| 7% 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 |
Gairdner
Rainfall to date: 64.7 mm. Days with significant stubble moisture: 38
| 27 Apr | 4 May | 11 May |
|---|---|---|
| 27% spore released - blackspot risk high | 34% spore released - blackspot risk medium | 50% spore released - blackspot risk medium |
| Do not sow | Do not sow | Do not sow – not suited agronomically |
Grass Patch
Rainfall to date: 88.6 mm. Days with significant stubble moisture: 52
| 27 Apr | 4 May | 11 May |
|---|---|---|
| 59% spore released - blackspot risk medium | 66% spore released - blackspot risk low | 79% spore released - blackspot risk low |
| Do not sow – not suited agronomically | Do not sow – not suited agronomically | Sow – do not sow dry |
Hillman
Rainfall to date: 70.9 mm. Days with significant stubble moisture: 34
| 27 Apr | 4 May | 11 May |
|---|---|---|
| 19% 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 |
Jacup
Rainfall to date: 94.7 mm. Days with significant stubble moisture: 43
| 27 Apr | 4 May | 11 May |
|---|---|---|
| 38% spore released - blackspot risk medium | 46% spore released - blackspot risk medium | 62% spore released - blackspot risk low |
| Do not sow | Do not sow | Sow – do not sow dry |
Katanning
Rainfall to date: 58.2 mm. Days with significant stubble moisture: 23
| 27 Apr | 4 May | 11 May |
|---|---|---|
| 3% spore released - blackspot risk high | 6% spore released - blackspot risk high | 17% spore released - blackspot risk high |
| Do not sow | Do not sow | Do not sow |
Kojonup
Rainfall to date: 56.6 mm. Days with significant stubble moisture: 30
| 27 Apr | 4 May | 11 May |
|---|---|---|
| 12% 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 |
Kondinin
Rainfall to date: 83.7 mm. Days with significant stubble moisture: 46
| 27 Apr | 4 May | 11 May |
|---|---|---|
| 46% spore released - blackspot risk medium | 53% spore released - blackspot risk medium | 68% spore released - blackspot risk low |
| Do not sow | Do not sow – not suited agronomically | Sow – do not sow dry |
Kulin
Rainfall to date: 92.7 mm. Days with significant stubble moisture: 39
| 27 Apr | 4 May | 11 May |
|---|---|---|
| 29% 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 |
Lake King
Rainfall to date: 77.3 mm. Days with significant stubble moisture: 44
| 27 Apr | 4 May | 11 May |
|---|---|---|
| 41% spore released - blackspot risk medium | 48% spore released - blackspot risk medium | 64% spore released - blackspot risk low |
| Do not sow | Do not sow – not suited agronomically | Sow – do not sow dry |
Merredin
Rainfall to date: 57.8 mm. Days with significant stubble moisture: 27
| 27 Apr | 4 May | 11 May |
|---|---|---|
| 7% 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 |
Mingenew
Rainfall to date: 98.4 mm. Days with significant stubble moisture: 22
| 27 Apr | 4 May | 11 May |
|---|---|---|
| 3% spore released - blackspot risk high | 5% spore released - blackspot risk high | 15% spore released - blackspot risk high |
| Do not sow | Do not sow | Do not sow |
Moora North West
Rainfall to date: 94.6 mm. Days with significant stubble moisture: 27
| 27 Apr | 4 May | 11 May |
|---|---|---|
| 7% 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 |
Mount Howick
Rainfall to date: 89.8 mm. Days with significant stubble moisture: 33
| 27 Apr | 4 May | 11 May |
|---|---|---|
| 17% spore released - blackspot risk high | 23% spore released - blackspot risk high | 38% spore released - blackspot risk medium |
| Do not sow | Do not sow | Do not sow |
Mt Barker WA
Rainfall to date: 96.4 mm. Days with significant stubble moisture: 70
| 27 Apr | 4 May | 11 May |
|---|---|---|
| 89% spore released - blackspot risk low | 92% spore released - blackspot risk low | 97% spore released - blackspot risk low |
| Do not sow – not suited agronomically | Do not sow – not suited agronomically | Do not sow – not suited agronomically |
Mullewa
Rainfall to date: 85.6 mm. Days with significant stubble moisture: 27
| 27 Apr | 4 May | 11 May |
|---|---|---|
| 7% 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 |
Narrogin
Rainfall to date: 70.9 mm. Days with significant stubble moisture: 34
| 27 Apr | 4 May | 11 May |
|---|---|---|
| 19% 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 |
Newdegate
Rainfall to date: 52.6 mm. Days with significant stubble moisture: 35
| 27 Apr | 4 May | 11 May |
|---|---|---|
| 21% 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 |
Northam
Rainfall to date: 60 mm. Days with significant stubble moisture: 28
| 27 Apr | 4 May | 11 May |
|---|---|---|
| 9% 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 |
Pingrup
Rainfall to date: 76.8 mm. Days with significant stubble moisture: 40
| 27 Apr | 4 May | 11 May |
|---|---|---|
| 31% spore released - blackspot risk medium | 38% spore released - blackspot risk medium | 55% spore released - blackspot risk medium |
| Do not sow | Do not sow | Do not sow – not suited agronomically |
Salmon Gums
Rainfall to date: 99.2 mm. Days with significant stubble moisture: 60
| 27 Apr | 4 May | 11 May |
|---|---|---|
| 75% spore released - blackspot risk low | 80% spore released - blackspot risk low | 89% spore released - blackspot risk low |
| Do not sow – not suited agronomically | Do not sow – not suited agronomically | Sow – do not sow dry |
Scaddan
Rainfall to date: 93 mm. Days with significant stubble moisture: 51
| 27 Apr | 4 May | 11 May |
|---|---|---|
| 57% spore released - blackspot risk medium | 64% spore released - blackspot risk low | 77% spore released - blackspot risk low |
| Do not sow | Do not sow – not suited agronomically | Sow – do not sow dry |
Tammin
Rainfall to date: 73.5 mm. Days with significant stubble moisture: 21
| 27 Apr | 4 May | 11 May |
|---|---|---|
| 2% spore released - blackspot risk high | 4% spore released - blackspot risk high | 13% spore released - blackspot risk high |
| Do not sow | Do not sow | Do not sow |
Toodyay
Rainfall to date: 54.3 mm. Days with significant stubble moisture: 31
| 27 Apr | 4 May | 11 May |
|---|---|---|
| 13% spore released - blackspot risk high | 19% spore released - blackspot risk high | 34% spore released - blackspot risk medium |
| Do not sow | Do not sow | Do not sow |