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 1st January 2021 to 20th June 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: 254.9 mm Days with significant stubble moisture: 56
| 20 June | 27 June | 4 July |
|---|---|---|
| 68% spores released - blackspot risk low | 80% spores released - blackspot risk low | 89% spores released - blackspot risk low |
| Sow - do not sow dry | Sow - do not sow dry | Getting too late to sow |
Boyup Brook
Rainfall to date: 348.7 mm Days with significant stubble moisture: 72
| 20 June | 27 June | 4 July |
|---|---|---|
| 91% spores released - blackspot risk low | 96% spores released - blackspot risk low | 99% spores released - blackspot risk low
|
| Sow - do not sow dry | Sow - do not sow dry | Getting too late to sow |
Cunderdin
Rainfall to date: 196.5 mm Days with significant stubble moisture: 62
| 20 June | 27 June | 4 July |
|---|---|---|
| 79% spores released - blackspot risk low | 88% spores released - blackspot risk low | 94% spores released - blackspot risk low
|
| Sow - do not sow dry | Sow - do not sow dry | Getting too late to sow |
Dalwallinu
Rainfall to date: 291.1 mm Days with significant stubble moisture: 59
| 20 June | 27 June | 4 July |
|---|---|---|
| 74% spores released - blackspot risk low | 85% spores released - blackspot risk low | 92% spores released - blackspot risk low |
| Too late to sow | Too late to sow | Too late to sow |
Darkan
Rainfall to date: 294.6 mm Days with significant stubble moisture: 81
| 20 June | 27 June | 4 July |
|---|---|---|
| 97% spores released - blackspot risk low | 99% spores released - blackspot risk low | 100% spores released - blackspot risk low |
| Sow - do not sow dry | Sow - do not sow dry | Getting too late to sow |
Dowerin
Rainfall to date: 168.3 mm Days with significant stubble moisture: 54
| 20 June | 27 June | 4 July |
|---|---|---|
| 64% spores released - blackspot risk low | 77% spores released - blackspot risk low | 87% spores released - blackspot risk low |
| Sow - do not sow dry | Sow - do not sow dry | Getting too late to sow |
Gairdner
Rainfall to date: 352.2 mm Days with significant stubble moisture: 76
| 20 June | 27 June | 4 July |
|---|---|---|
| 94% spores released - blackspot risk low | 98% spores released - blackspot risk low | 99% spores released - blackspot risk low |
| Sow - do not sow dry | Sow - do not sow dry | Sow - do not sow dry |
Grass Patch
Rainfall to date: 189.4 mm Days with significant stubble moisture: 97
| 20 June | 27 June | 4 July |
|---|---|---|
| 100% spores released - blackspot risk low | 100% spores released - blackspot risk low | 100% spores released - blackspot risk low |
| Sow - do not sow dry | Sow - do not sow dry | Getting too late to sow |
Jacup
Rainfall to date: 302.1 mm Days with significant stubble moisture: 86
| 20 June | 27 June | 4 July |
|---|---|---|
| 99% spores released - blackspot risk low | 100% spores released - blackspot risk low | 100% spores released - blackspot risk low |
| Sow - do not sow dry | Sow - do not sow dry | Getting too late to sow |
Katanning
Rainfall to date: 227.8 mm Days with significant stubble moisture: 78
| 20 June | 27 June | 4 July |
|---|---|---|
| 96% spores released - blackspot risk low | 98% spores released - blackspot risk low | 100% spores released - blackspot risk low |
| Sow - do not sow dry | Sow - do not sow dry | Getting too late to sow |
Kojonup
Rainfall to date: 332.8 mm Days with significant stubble moisture: 77
| 20 June | 27 June | 4 July |
|---|---|---|
| 95% spores released - blackspot risk low | 98% spores released - blackspot risk low | 99% spores released - blackspot risk low |
| Sow - do not sow dry | Sow - do not sow dry | Getting too late to sow |
Kondinin
Rainfall to date: 206.6 mm Days with significant stubble moisture: 69
| 20 June | 27 June | 4 July |
|---|---|---|
| 88% spores released - blackspot risk low | 94% spores released - blackspot risk low | 98% spores released - blackspot risk low |
| Sow - do not sow dry | Sow - do not sow dry | Getting too late to sow |
Kulin
Rainfall to date: 141.7 mm Days with significant stubble moisture: 39
| 20 June | 27 June | 4 July |
|---|---|---|
| 29% spores released - blackspot risk high | 46% spores released - blackspot risk medium | 62% spores released - blackspot risk low |
| Do not sow | Sow - do not sow dry | Getting too late to sow |
Lake Camm
Rainfall to date: 210.6 mm Days with significant stubble moisture: 77
| 20 June | 27 June | 4 July |
|---|---|---|
| 95% spores released - blackspot risk low | 98% spores released - blackspot risk low | 99% spores released - blackspot risk low |
| Sow - do not sow dry | Sow - do not sow dry | Getting too late to sow |
Merredin
Rainfall to date: 173.5 mm Days with significant stubble moisture: 55
| 20 June | 27 June | 4 July |
|---|---|---|
| 66% spores released - blackspot risk low | 79% spores released - blackspot risk low | 88% spores released - blackspot risk low |
| Sow - do not sow dry | Sow - do not sow dry | Getting too late to sow |
Mingenew
Rainfall to date: 209.5 mm Days with significant stubble moisture: 59
| 20 June | 27 June | 4 July |
|---|---|---|
| 74% spores released - blackspot risk low | 85% spores released - blackspot risk low | 92% spores released - blackspot risk low |
| Sow - do not sow dry | Sow - do not sow dry | Getting too late to sow |
Moora North West
Rainfall to date: 241.4 mm Days with significant stubble moisture: 68
| 20 June | 27 June | 4 July |
|---|---|---|
| 87% spores released - blackspot risk low | 94% spores released - blackspot risk low | 97% spores released - blackspot risk low |
| Sow - do not sow dry | Sow - do not sow dry | Getting too late to sow |
Mount Howick
Rainfall to date: 206 mm Days with significant stubble moisture: 88
| 20 June | 27 June | 4 July |
|---|---|---|
| 99% spores released - blackspot risk low | 100% spores released - blackspot risk low | 100% spores released - blackspot risk low |
| Sow - do not sow dry | Sow - do not sow dry | Getting too late to sow |
Mt Barker
Rainfall to date: 428.2 mm Days with significant stubble moisture: 112
| 20 June | 27 June | 4 July |
|---|---|---|
| 100% spores released - blackspot risk low | 100% spores released - blackspot risk low | 100% spores released - blackspot risk low |
| Sow - do not sow dry | Sow - do not sow dry | Sow - do not sow dry |
Mullewa
Rainfall to date: 233.2 mm Days with significant stubble moisture: 57
| 20 June | 27 June | 4 July |
|---|---|---|
| 70% spores released - blackspot risk low | 82% spores released - blackspot risk low | 90% spores released - blackspot risk low |
| Too late to sow | Too late to sow | Too late to sow |
Narrogin
Rainfall to date: 205.4 mm Days with significant stubble moisture: 59
| 20 June | 27 June | 4 July |
|---|---|---|
| 74% spores released - blackspot risk low | 85% spores released - blackspot risk low | 92% spores released - blackspot risk low |
| Sow - do not sow dry | Sow - do not sow dry | Getting too late to sow |
Newdegate
Rainfall to date: 173.8 mm Days with significant stubble moisture: 68
| 20 June | 27 June | 4 July |
|---|---|---|
| 87% spores released - blackspot risk low | 94% spores released - blackspot risk low | 97% spores released - blackspot risk low |
| Sow - do not sow dry | Sow - do not sow dry | Getting too late to sow |
Northam
Rainfall to date: 297.3 mm Days with significant stubble moisture: 57
| 20 June | 27 June | 4 July |
|---|---|---|
| 70% spores released - blackspot risk low | 82% spores released - blackspot risk low | 90% spores released - blackspot risk low |
| Sow - do not sow dry | Sow - do not sow dry | Getting too late to sow |
Pingrup
Rainfall to date: 155.4 mm Days with significant stubble moisture: 52
| 20 June | 27 June | 4 July |
|---|---|---|
| 59% spores released - blackspot risk medium | 74% spores released - blackspot risk low | 85% spores released - blackspot risk low |
| Sow - do not sow dry | Sow - do not sow dry | Getting too late to sow |
Salmon Gums
Rainfall to date: 216.2 mm Days with significant stubble moisture: 87
| 20 June | 27 June | 4 July |
|---|---|---|
| 99% spores released - blackspot risk low | 100% spores released - blackspot risk low | 100% spores released - blackspot risk low |
| Sow - do not sow dry | Sow - do not sow dry | Getting too late to sow |
Scaddan
Rainfall to date: 218.4 mm Days with significant stubble moisture: 106
| 20 June | 27 June | 4 July |
|---|---|---|
| 100% spores released - blackspot risk low | 100% spores released - blackspot risk low | 100% spores released - blackspot risk low |
| Sow - do not sow dry | Sow - do not sow dry | Getting too late to sow |
Tammin
Rainfall to date: 194.2 mm Days with significant stubble moisture: 54
| 20 June | 27 June | 4 July |
|---|---|---|
| 64% spores released - blackspot risk low | 77% spores released - blackspot risk low | 87% spores released - blackspot risk low |
| Sow - do not sow dry | Sow - do not sow dry | Getting too late to sow |
Toodyay
Rainfall to date: 290.1 mm Days with significant stubble moisture: 65
| 20 June | 27 June | 4 July |
|---|---|---|
| 83% spores released - blackspot risk low | 91% spores released - blackspot risk low | 96% spores released - blackspot risk low |
| Sow - do not sow dry | Sow - do not sow dry | Getting too late to sow |