You may notice weather station changes for some locations. This is to ensure that the weather data being used is the most accurate available for the area and uses open DPIRD and BOM weather stations whenever possible. In some locations, a suitable weather station may not be available and so we may use interpolated weather data, which uses data from surrounding stations to create reasonable values for missing weather data.
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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Key to blackspot severity scores
The aim is to delay sowing of field pea crops, where agronomically possible, until the majority of blackspot spores (approximately 60%) have been released prior to the crop emergence. This strategy reduces yield losses from blackspot.
| Blackspot risk | Spores released (%) | Yield loss for different levels of blackspot risk scenarios (%) |
|---|---|---|
| Low | 60 – 100 | 2 - 15 |
| Medium | 30 - 59 | 20 - 35 |
| High | 0 - 29 | 25 - 50 |
Bencubbin
Last date used for prediction: 15 May 2023
Rainfall to date: 91.6 mm Days with significant stubble moisture: 22
| 16 May | 23 May | 30 May |
| 3% spores released - blackspot risk high | 12% spores released - blackspot risk high | 25% spores released - blackspot risk high |
| Do not sow | Do not sow | Do not sow |
Cunderdin
Last date used for prediction: 15 May 2023
Rainfall to date: 103.4 mm Days with significant stubble moisture: 35
| 16 May | 23 May | 30 May |
| 23% spores released - blackspot risk high | 38% spores released - blackspot risk medium | 55% spores released - blackspot risk medium |
| Do not sow | Do not sow | Sow - do not sow dry |
Dalwallinu
Last date used for prediction: 15 May 2023
Rainfall to date: 62 mm Days with significant stubble moisture: 31
| 16 May | 23 May | 30 May |
| 13% spores released - blackspot risk high | 27% spores released - blackspot risk high | 43% spores released - blackspot risk medium |
| Do not sow | Do not sow | Sow - do not sow dry |
Darkan
Last date used for prediction: 15 May 2023
Rainfall to date: 79.8 mm Days with significant stubble moisture: 50
| 16 May | 23 May | 30 May |
| 57% spores released - blackspot risk medium | 72% spores released - blackspot risk low | 83% spores released - blackspot risk low |
| Do not sow | Sow - do not sow dry | Sow - do not sow dry |
Dinninup (Boyup Brook)
Last date used for prediction: 15 May 2023
Rainfall to date: 67.8 mm Days with significant stubble moisture: 42
| 16 May | 23 May | 30 May |
| 38% spores released - blackspot risk medium | 55% spores released - blackspot risk medium | 70% spores released - blackspot risk low |
| Do not sow | Do not sow | Sow - do not sow dry |
Ejanding (Dowerin)
Last date used for prediction: 15 May 2023
Rainfall to date: 85.8 mm Days with significant stubble moisture: 33
| 16 May | 23 May | 30 May |
| 17% spores released - blackspot risk high | 31% spores released - blackspot risk medium | 48% spores released - blackspot risk medium |
| Do not sow | Do not sow | Sow - do not sow dry |
Gairdner
Last date used for prediction: 15 May 2023
Rainfall to date: 62.1 mm Days with significant stubble moisture: 37
| 16 May | 23 May | 30 May |
| 27% spores released - blackspot risk high | 43% spores released - blackspot risk medium | 59% spores released - blackspot risk medium |
| Do not sow | Do not sow | Do not sow |
Grass Patch
Last date used for prediction: 15 May 2023
Rainfall to date: 56 mm Days with significant stubble moisture: 33
| 16 May | 23 May | 30 May |
| 17% spores released - blackspot risk high | 31% spores released - blackspot risk medium | 48% spores released - blackspot risk medium |
| Do not sow | Do not sow | Sow - do not sow dry |
Jacup
Last date used for prediction: 15 May 2023
Rainfall to date: 91.9 mm Days with significant stubble moisture: 33
| 16 May | 23 May | 30 May |
| 17% spores released - blackspot risk high | 31% spores released - blackspot risk medium | 48% spores released - blackspot risk medium |
| Do not sow | Do not sow | Sow - do not sow dry |
Katanning
Last date used for prediction: 15 May 2023
Rainfall to date: 64.2 mm Days with significant stubble moisture: 49
| 16 May | 23 May | 30 May |
| 55% spores released - blackspot risk medium | 70% spores released - blackspot risk low | 82% spores released - blackspot risk low |
| Do not sow | Sow - do not sow dry | Sow - do not sow dry |
Kojonup
Last date used for prediction: 15 May 2023
Rainfall to date: 56 mm Days with significant stubble moisture: 28
| 16 May | 23 May | 30 May |
| 10% spores released - blackspot risk high | 23% spores released - blackspot risk high | 38% spores released - blackspot risk medium |
| Do not sow | Do not sow | Do not sow |
Kondinin
Last date used for prediction: 15 May 2023
Rainfall to date: 121.7 mm Days with significant stubble moisture: 35
| 16 May | 23 May | 30 May |
| 23% spores released - blackspot risk high | 38% spores released - blackspot risk medium | 55% spores released - blackspot risk medium |
| Do not sow | Do not sow | Sow - do not sow dry |
Kulin
Last date used for prediction: 15 May 2023
Rainfall to date: 115.1 mm Days with significant stubble moisture: 32
| 16 May | 23 May | 30 May |
| 17% spores released - blackspot risk high | 31% spores released - blackspot risk medium | 48% spores released - blackspot risk medium |
| Do not sow | Do not sow | Sow - do not sow dry |
Lake King
Last date used for prediction: 15 May 2023
Rainfall to date: 105.2 mm Days with significant stubble moisture: 19
| 16 May | 23 May | 30 May |
| 1% spores released - blackspot risk high | 6% spores released - blackspot risk high | 17% spores released - blackspot risk high |
| Do not sow | Do not sow | Do not sow |
Merredin
Last date used for prediction: 15 May 2023
Rainfall to date: 65.9 mm Days with significant stubble moisture: 24
| 16 May | 23 May | 30 May |
| 5% spores released - blackspot risk high | 15% spores released - blackspot risk high | 29% spores released - blackspot risk high |
| Do not sow | Do not sow | Do not sow |
Mingenew
Last date used for prediction: 15 May 2023
Rainfall to date: 54.4 mm Days with significant stubble moisture: 21
| 16 May | 23 May | 30 May |
| 2% spores released - blackspot risk high | 9% spores released - blackspot risk high | 21% spores released - blackspot risk high |
| Do not sow | Do not sow | Do not sow |
Moora North West
Last date used for prediction: 15 May 2023
Rainfall to date: 51.8 mm Days with significant stubble moisture: 34
| 16 May | 23 May | 30 May |
| 21% spores released - blackspot risk high | 36% spores released - blackspot risk medium | 53% spores released - blackspot risk medium |
| Do not sow | Do not sow | Sow - do not sow dry |
Mount Howick
Last date used for prediction: 15 May 2023
Rainfall to date: 121.6 mm Days with significant stubble moisture: 62
| 16 May | 23 May | 30 May |
| 80% spores released - blackspot risk low | 89% spores released - blackspot risk low | 95% spores released - blackspot risk low |
| Sow - do not sow dry | Sow - do not sow dry | Sow - do not sow dry |
Mount Madden East
Last date used for prediction: 15 May 2023
Rainfall to date: 70.2 mm Days with significant stubble moisture: 18
| 16 May | 23 May | 30 May |
| 1% spores released - blackspot risk high | 5% spores released - blackspot risk high | 15% spores released - blackspot risk high |
| Do not sow | Do not sow | Do not sow |
Mt Barker WA
Last date used for prediction: 15 May 2023
Rainfall to date: 127.2 mm Days with significant stubble moisture: 65
| 16 May | 23 May | 30 May |
| 85% spores released - blackspot risk low | 92% spores released - blackspot risk low | 97% spores released - blackspot risk low |
| Too early to sow before the 25th May | Too early to sow before the 25th May | Sow - do not sow dry |
Mullewa
Last date used for prediction: 15 May 2023
Rainfall to date: 101.2 mm Days with significant stubble moisture: 39
| 16 May | 23 May | 30 May |
| 29% spores released - blackspot risk high | 46% spores released - blackspot risk medium | 62% spores released - blackspot risk low |
| Do not sow | Do not sow | Sow - do not sow dry |
Narrogin
Last date used for prediction: 15 May 2023
Rainfall to date: 128.6 mm Days with significant stubble moisture: 42
| 16 May | 23 May | 30 May |
| 38% spores released - blackspot risk medium | 55% spores released - blackspot risk medium | 70% spores released - blackspot risk low |
| Do not sow | Do not sow | Sow - do not sow dry |
Newdegate
Last date used for prediction: 15 May 2023
Rainfall to date: 101 mm Days with significant stubble moisture: 34
| 16 May | 23 May | 30 May |
| 19% spores released - blackspot risk high | 34% spores released - blackspot risk medium | 50% spores released - blackspot risk medium |
| Do not sow | Do not sow | Sow - do not sow dry |
Northam
Last date used for prediction: 15 May 2023
Rainfall to date: 99.7 mm Days with significant stubble moisture: 31
| 16 May | 23 May | 30 May |
| 15% spores released - blackspot risk high | 29% spores released - blackspot risk high | 46% spores released - blackspot risk medium |
| Do not sow | Do not sow | Sow - do not sow dry |
Pingaring
Last date used for prediction: 15 May 2023
Rainfall to date: 161.4 mm Days with significant stubble moisture: 36
| 16 May | 23 May | 30 May |
| 25% spores released - blackspot risk high | 41% spores released - blackspot risk medium | 57% spores released - blackspot risk medium |
| Do not sow | Do not sow | Sow - do not sow dry |
Pingrup
Last date used for prediction: 15 May 2023
Rainfall to date: 78.8 mm Days with significant stubble moisture: 37
| 16 May | 23 May | 30 May |
| 27% spores released - blackspot risk high | 43% spores released - blackspot risk medium | 59% spores released - blackspot risk medium |
| Do not sow | Do not sow | Sow - do not sow dry |
Ravensthorpe
Last date used for prediction: 15 May 2023
Rainfall to date: 96 mm Days with significant stubble moisture: 38
| 16 May | 23 May | 30 May |
| 29% spores released - blackspot risk high | 46% spores released - blackspot risk medium | 62% spores released - blackspot risk low |
| Do not sow | Do not sow | Sow - do not sow dry |
Salmon Gums
Last date used for prediction: 15 May 2023
Rainfall to date: 93 mm Days with significant stubble moisture: 47
| 16 May | 23 May | 30 May |
| 50% spores released - blackspot risk medium | 66% spores released - blackspot risk low | 79% spores released - blackspot risk low |
| Do not sow | Sow - do not sow dry | Sow - do not sow dry |
Scaddan
Last date used for prediction: 15 May 2023
Rainfall to date: 54.4 mm Days with significant stubble moisture: 28
| 16 May | 23 May | 30 May |
| 9% spores released - blackspot risk high | 21% spores released - blackspot risk high | 36% spores released - blackspot risk medium |
| Do not sow | Do not sow | Do not sow |
Tammin
Last date used for prediction: 15 May 2023
Rainfall to date: 107.9 mm Days with significant stubble moisture: 30
| 16 May | 23 May | 30 May |
| 13% spores released - blackspot risk high | 27% spores released - blackspot risk high | 43% spores released - blackspot risk medium |
| Do not sow | Do not sow | Do not sow |
Last date used for prediction: 15 May 2023
Rainfall to date: 73.5 mm Days with significant stubble moisture: 28
| 16 May | 23 May | 30 May |
| 10% spores released - blackspot risk high | 23% spores released - blackspot risk high | 38% spores released - blackspot risk medium |
| Do not sow | Do not sow | Do not sow |
