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 2022 to 29th May 2022 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 |
Risk forecast map
[2]Bencubbin
Last date used for prediction: 28 May 2022
Rainfall to date: 160.4 mm Days with significant stubble moisture: 51
| 28 May | 4 June | 11 June |
| 57% spores released - blackspot risk medium | 72% spores released - blackspot risk low | 83% spores released - blackspot risk low |
| Sow - do not sow dry | Sow - do not sow dry | Sow - do not sow dry |
Boyup Brook
Last date used for prediction: 28 May 2022
Rainfall to date: 110.2 mm Days with significant stubble moisture: 52
| 28 May | 4 June | 11 June |
| 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 | Sow - do not sow dry |
Cunderdin
Last date used for prediction: 28 May 2022
Rainfall to date: 105.5 mm Days with significant stubble moisture: 41
| 28 May | 4 June | 11 June |
| 34% spores released - blackspot risk medium | 50% spores released - blackspot risk medium | 66% spores released - blackspot risk low |
| Do not sow | Sow - do not sow dry | Sow - do not sow dry |
Dalwallinu
Last date used for prediction: 28 May 2022
Rainfall to date: 90.4 mm Days with significant stubble moisture: 44
| 28 May | 4 June | 11 June |
| 41% spores released - blackspot risk medium | 57% spores released - blackspot risk medium | 72% spores released - blackspot risk low |
| Sow - do not sow dry | Sow - do not sow dry | Sow - do not sow dry |
Darkan
Last date used for prediction: 28 May 2022
Rainfall to date: 115.7 mm Days with significant stubble moisture: 50
| 28 May | 4 June | 11 June |
| 55% spores released - blackspot risk medium | 70% spores released - blackspot risk low | 82% spores released - blackspot risk low |
| Sow - do not sow dry | Sow - do not sow dry | Sow - do not sow dry |
Dowerin
Last date used for prediction: 28 May 2022
Rainfall to date: 87.9 mm Days with significant stubble moisture: 56
| 28 May | 4 June | 11 June |
| 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 | Sow - do not sow dry |
Gairdner
Last date used for prediction: 28 May 2022
Rainfall to date: 178.8 mm Days with significant stubble moisture: 92
| 28 May | 4 June | 11 June |
| 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 |
Grass Patch
Last date used for prediction: 28 May 2022
Rainfall to date: 180.2 mm Days with significant stubble moisture: 58
| 28 May | 4 June | 11 June |
| 72% spores released - blackspot risk low | 83% spores released - blackspot risk low | 91% spores released - blackspot risk low |
| Sow - do not sow dry | Sow - do not sow dry | Sow - do not sow dry |
Jacup
Last date used for prediction: 28 May 2022
Rainfall to date: 245.6 mm Days with significant stubble moisture: 77
| 28 May | 4 June | 11 June |
| 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 | Sow - do not sow dry |
Katanning
Last date used for prediction: 28 May 2022
Rainfall to date: 125 mm Days with significant stubble moisture: 52
| 28 May | 4 June | 11 June |
| 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 | Sow - do not sow dry |
Kojonup
Last date used for prediction: 28 May 2022
Rainfall to date: 140 mm Days with significant stubble moisture: 50
| 28 May | 4 June | 11 June |
| 55% spores released - blackspot risk medium | 70% spores released - blackspot risk low | 82% spores released - blackspot risk low |
| Sow - do not sow dry | Sow - do not sow dry | Sow - do not sow dry |
Kondinin
Last date used for prediction: 28 May 2022
Rainfall to date: 133.9 mm Days with significant stubble moisture: 39
| 28 May | 4 June | 11 June |
| 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 | Sow - do not sow dry |
Kulin
Last date used for prediction: 28 May 2022
Rainfall to date: 123.1 mm Days with significant stubble moisture: 38
| 28 May | 4 June | 11 June |
| 27% spores released - blackspot risk high | 43% spores released - blackspot risk medium | 59% spores released - blackspot risk medium |
| Do not sow | Sow - do not sow dry | Sow - do not sow dry |
Lake Camm
Last date used for prediction: 28 May 2022
Rainfall to date: 155.3 mm Days with significant stubble moisture: 61
| 28 May | 4 June | 11 June |
| 77% spores released - blackspot risk low | 87% spores released - blackspot risk low | 94% spores released - blackspot risk low |
| Sow - do not sow dry | Sow - do not sow dry | Sow - do not sow dry |
Merredin
Last date used for prediction: 28 May 2022
Rainfall to date: 156 mm Days with significant stubble moisture: 60
| 28 May | 4 June | 11 June |
| 75% spores released - blackspot risk low | 86% spores released - blackspot risk low | 93% spores released - blackspot risk low |
| Sow - do not sow dry | Sow - do not sow dry | Sow - do not sow dry |
Mingenew
Last date used for prediction: 28 May 2022
Rainfall to date: 84.3 mm Days with significant stubble moisture: 40
| 28 May | 4 June | 11 June |
| 31% spores released - blackspot risk medium | 48% spores released - blackspot risk medium | 64% spores released - blackspot risk low |
| Do not sow | Sow - do not sow dry | Sow - do not sow dry |
Moora North West
Last date used for prediction: 28 May 2022
Rainfall to date: 229.8 mm Days with significant stubble moisture: 51
| 28 May | 4 June | 11 June |
| 57% spores released - blackspot risk medium | 72% spores released - blackspot risk low | 83% spores released - blackspot risk low |
| Sow - do not sow dry | Sow - do not sow dry | Sow - do not sow dry |
Mount Howick
Last date used for prediction: 28 May 2022
Rainfall to date: 167.4 mm Days with significant stubble moisture: 61
| 28 May | 4 June | 11 June |
| 77% spores released - blackspot risk low | 87% spores released - blackspot risk low | 94% 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: 28 May 2022
Rainfall to date: 152 mm Days with significant stubble moisture: 53
| 28 May | 4 June | 11 June |
| 62% spores released - blackspot risk low | 75% spores released - blackspot risk low | 86% spores released - blackspot risk low |
| Sow - do not sow dry | Sow - do not sow dry | Sow - do not sow dry |
Mt Barker WA
Last date used for prediction: 28 May 2022
Rainfall to date: 173.6 mm Days with significant stubble moisture: 84
| 28 May | 4 June | 11 June |
| 98% 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 | Sow - do not sow dry |
Mullewa
Last date used for prediction: 28 May 2022
Rainfall to date: 128.5 mm Days with significant stubble moisture: 47
| 28 May | 4 June | 11 June |
| 48% spores released - blackspot risk medium | 64% spores released - blackspot risk low | 77% spores released - blackspot risk low |
| Sow - do not sow dry | Sow - do not sow dry | Sow - do not sow dry |
Narrogin
Last date used for prediction: 28 May 2022
Rainfall to date: 94.4 mm Days with significant stubble moisture: 31
| 28 May | 4 June | 11 June |
| 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 |
Newdegate
Last date used for prediction: 28 May 2022
Rainfall to date: 118 mm Days with significant stubble moisture: 42
| 28 May | 4 June | 11 June |
| 36% spores released - blackspot risk medium | 53% spores released - blackspot risk medium | 68% spores released - blackspot risk low |
| Do not sow | Sow - do not sow dry | Sow - do not sow dry |
Northam
Last date used for prediction: 28 May 2022
Rainfall to date: 86.2 mm Days with significant stubble moisture: 46
| 28 May | 4 June | 11 June |
| 46% spores released - blackspot risk medium | 62% spores released - blackspot risk low | 75% spores released - blackspot risk low |
| Do not sow | Sow - do not sow dry | Sow - do not sow dry |
Pingrup
Last date used for prediction: 28 May 2022
Rainfall to date: 119.3 mm Days with significant stubble moisture: 49
| 28 May | 4 June | 11 June |
| 53% spores released - blackspot risk medium | 68% spores released - blackspot risk low | 80% spores released - blackspot risk low |
| Sow - do not sow dry | Sow - do not sow dry | Sow - do not sow dry |
Ravensthorpe
Last date used for prediction: 28 May 2022
Rainfall to date: 233.6 mm Days with significant stubble moisture: 59
| 28 May | 4 June | 11 June |
| 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 | Sow - do not sow dry |
Salmon Gums
Last date used for prediction: 28 May 2022
Rainfall to date: 139.8 mm Days with significant stubble moisture: 54
| 28 May | 4 June | 11 June |
| 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 | Sow - do not sow dry |
Scaddan
Last date used for prediction: 28 May 2022
Rainfall to date: 173.8 mm Days with significant stubble moisture: 67
| 28 May | 4 June | 11 June |
| 86% spores released - blackspot risk low | 93% spores released - blackspot risk low | 97% spores released - blackspot risk low |
| Sow - do not sow dry | Sow - do not sow dry | Sow - do not sow dry |
Tammin
Last date used for prediction: 28 May 2022
Rainfall to date: 110.4 mm Days with significant stubble moisture: 48
| 28 May | 4 June | 11 June |
| 50% spores released - blackspot risk medium | 66% spores released - blackspot risk low | 79% spores released - blackspot risk low |
| Sow - do not sow dry | Sow - do not sow dry | Sow - do not sow dry |
Toodyay
Last date used for prediction: 28 May 2022
Rainfall to date: 94.7 mm Days with significant stubble moisture: 44
| 28 May | 4 June | 11 June |
| 41% spores released - blackspot risk medium | 57% spores released - blackspot risk medium | 72% spores released - blackspot risk low |
| Do not sow | Sow - do not sow dry | Sow - do not sow dry |