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.
This prediction is based on DPIRD's Blackspot Manager model using weather data from 1 January 2021 to 9 May 2021 from the nearest weather station.
You may notice weather station changes for one location, this is to ensure that the weather data being used is the most accurate available for the area, and can be influenced by BOM locations. The location that has changed is Lake King which now is Lake Camm.
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.
Missing a location or would like to receive email or sms alerts?
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
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
Rainfall to date: 167.4 mm Days with significant stubble moisture: 22
| 9 May | 16 May | 23 May |
|---|---|---|
| 3% spores released - blackspot risk high | 10% spores released - blackspot risk high | 23% spores released - blackspot risk high |
| Do not sow | Do not sow | Do not sow |
Boyup Brook
Rainfall to date: 216.1 mm Days with significant stubble moisture: 35
| 9 May | 16 May | 23 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 | Do not sow |
Cunderdin
Rainfall to date: 156.7 mm Days with significant stubble moisture: 39
| 9 May | 16 May | 23 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 |
Dalwallinu
Rainfall to date: 227.8 mm Days with significant stubble moisture: 33
| 9 May | 16 May | 23 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 | Do not sow |
Darkan
Rainfall to date: 220.2 mm Days with significant stubble moisture: 50
| 9 May | 16 May | 23 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 |
Dowerin
Rainfall to date: 133.2 mm Days with significant stubble moisture: 30
| 9 May | 16 May | 23 May |
|---|---|---|
| 12% spores released - blackspot risk high | 25% spores released - blackspot risk high | 41% spores released - blackspot risk medium |
| Do not sow | Do not sow | Do not sow |
Gairdner
Rainfall to date: 214.5 mm Days with significant stubble moisture: 46
| 9 May | 16 May | 23 May |
|---|---|---|
| 46% spores released - blackspot risk medium | 62% spores released - blackspot risk low | 75% spores released - blackspot risk low |
| Do not sow | Too early to sow before the 18th May | Sow - do not sow dry |
Grass Patch
Rainfall to date: 128.3 mm Days with significant stubble moisture: 68
| 9 May | 16 May | 23 May |
|---|---|---|
| 87% spores released - blackspot risk low | 94% spores released - blackspot risk low | 97% spores released - blackspot risk low |
| Too early to sow before the 10th May | Sow - do not sow dry | Sow - do not sow dry |
Jacup
Rainfall to date: 211 mm Days with significant stubble moisture: 56
| 9 May | 16 May | 23 May |
|---|---|---|
| 68% spores released - blackspot risk low | 80% spores released - blackspot risk low | 89% spores released - blackspot risk low |
| Too early to sow before the 10th May | Sow - do not sow dry | Sow - do not sow dry |
Katanning
Rainfall to date: 171.8 mm Days with significant stubble moisture: 47
| 9 May | 16 May | 23 May |
|---|---|---|
| 48% spores released - blackspot risk medium | 64% spores released - blackspot risk low | 77% spores released - blackspot risk low |
| Do not sow | Sow - do not sow dry | Sow - do not sow dry |
Kojonup
Rainfall to date: 266 mm Days with significant stubble moisture: 42
| 9 May | 16 May | 23 May |
|---|---|---|
| 36% spores released - blackspot risk medium | 53% spores released - blackspot risk medium | 68% spores released - blackspot risk low |
| Do not sow | Do not sow | Sow - do not sow dry |
Kondinin
Rainfall to date: 155.2 mm Days with significant stubble moisture: 39
| 9 May | 16 May | 23 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 |
Kulin
Rainfall to date: 89.6 mm Days with significant stubble moisture: 15
| 9 May | 16 May | 23 May |
|---|---|---|
| 0% spores released - blackspot risk high | 3% spores released - blackspot risk high | 10% spores released - blackspot risk high |
| Do not sow | Do not sow | Do not sow |
Lake Camm
Rainfall to date: 168 mm Days with significant stubble moisture: 45
| 9 May | 16 May | 23 May |
|---|---|---|
| 43% spores released - blackspot risk medium | 59% spores released - blackspot risk medium | 74% spores released - blackspot risk low |
| Do not sow | Do not sow | Sow - do not sow dry |
Merredin
Rainfall to date: 146.2 mm Days with significant stubble moisture: 34
| 9 May | 16 May | 23 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 | Do not sow |
Mingenew
Rainfall to date: 129.7 mm Days with significant stubble moisture: 31
| 9 May | 16 May | 23 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 |
Moora North West
Rainfall to date: 176 mm Days with significant stubble moisture: 41
| 9 May | 16 May | 23 May |
|---|---|---|
| 34% spores released - blackspot risk medium | 50% spores released - blackspot risk medium | 66% spores released - blackspot risk low |
| Do not sow | Do not sow | Sow - do not sow dry |
Mount Howick
Rainfall to date: 106.4 mm Days with significant stubble moisture: 56
| 9 May | 16 May | 23 May |
|---|---|---|
| 68% spores released - blackspot risk low | 80% spores released - blackspot risk low | 89% spores released - blackspot risk low |
| Too early to sow before the 10th May | Sow - do not sow dry | Sow - do not sow dry |
Mt Barker
Rainfall to date: 239.5 mm Days with significant stubble moisture: 82
| 9 May | 16 May | 23 May |
|---|---|---|
| 97% spores released - blackspot risk low | 99% spores released - blackspot risk low | 100% spores released - blackspot risk low |
| Too early to sow before the 25th May | Too early to sow before the 25th May | Too early to sow before the 25th May |
Mullewa
Rainfall to date: 183 mm Days with significant stubble moisture: 33
| 9 May | 16 May | 23 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 | Do not sow |
Narrogin
Rainfall to date: 163.4 mm Days with significant stubble moisture: 36
| 9 May | 16 May | 23 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 | Do not sow |
Newdegate
Rainfall to date: 128.4 mm Days with significant stubble moisture: 41
| 9 May | 16 May | 23 May |
|---|---|---|
| 34% spores released - blackspot risk medium | 50% spores released - blackspot risk medium | 66% spores released - blackspot risk low |
| Do not sow | Do not sow | Sow - do not sow dry |
Northam
Rainfall to date: 239.9 mm Days with significant stubble moisture: 30
| 9 May | 16 May | 23 May |
|---|---|---|
| 12% spores released - blackspot risk high | 25% spores released - blackspot risk high | 41% spores released - blackspot risk medium |
| Do not sow | Do not sow | Do not sow |
Pingrup
Rainfall to date: 133.2 mm Days with significant stubble moisture: 32
| 9 May | 16 May | 23 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 | Do not sow |
Salmon Gums
Rainfall to date: 149.8 mm Days with significant stubble moisture: 58
| 9 May | 16 May | 23 May |
|---|---|---|
| 72% spores released - blackspot risk low | 83% spores released - blackspot risk low | 91% spores released - blackspot risk low |
| Too early to sow before the 10th May | Sow - do not sow dry | Sow - do not sow dry |
Scaddan
Rainfall to date: 130.3 mm Days with significant stubble moisture: 66
| 9 May | 16 May | 23 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 10th May | Sow - do not sow dry | Sow - do not sow dry |
Tammin
Rainfall to date: 137.4 mm Days with significant stubble moisture: 31
| 9 May | 16 May | 23 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 |
Toodyay
Rainfall to date: 255.1 mm Days with significant stubble moisture: 41
| 9 May | 16 May | 23 May |
|---|---|---|
| 34% spores released - blackspot risk medium | 50% spores released - blackspot risk medium | 66% spores released - blackspot risk low |
| Do not sow | Do not sow | Sow - do not sow dry |
