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 2023 to 1 May 2023 from the nearest weather station.
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.
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
Last date used for prediction: 27 April 2023
Rainfall to date: 85.6 mm Days with significant stubble moisture: 20
| 2 May | 9 May | 16 May |
| 2% spores released - blackspot risk high | 7% spores released - blackspot risk high | 19% spores released - blackspot risk high |
| Do not sow | Do not sow | Do not sow |
Cunderdin
Last date used for prediction: 27 April 2023
Rainfall to date: 87.6 mm Days with significant stubble moisture: 22
| 2 May | 9 May | 16 May |
| 6% spores released - blackspot risk high | 17% spores released - blackspot risk high | 31% spores released - blackspot risk medium |
| Do not sow | Do not sow | Do not sow |
Dalwallinu
Last date used for prediction: 27 April 2023
Rainfall to date: 53 mm Days with significant stubble moisture: 24
| 2 May | 9 May | 16 May |
| 4% spores released - blackspot risk high | 13% spores released - blackspot risk high | 27% spores released - blackspot risk high |
| Do not sow | Do not sow | Do not sow |
Darkan
Last date used for prediction: 27 April 2023
Rainfall to date: 62.5 mm Days with significant stubble moisture: 35
| 2 May | 9 May | 16 May |
| 31% spores released - blackspot risk medium | 48% spores released - blackspot risk medium | 64% spores released - blackspot risk low |
| Do not sow | Do not sow | Sow - do not sow dry |
Dinninup (Boyup Brook)
Last date used for prediction: 1 May 2023
Rainfall to date: 55.6 mm Days with significant stubble moisture: 35
| 2 May | 9 May | 16 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 |
Ejanding (Dowerin)
Last date used for prediction: 1 May 2023
Rainfall to date: 77.8 mm Days with significant stubble moisture: 25
| 2 May | 9 May | 16 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 |
Gairdner
Last date used for prediction: 27 April 2023
Rainfall to date: 54.8 mm Days with significant stubble moisture: 23
| 2 May | 9 May | 16 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 |
Grass Patch
Last date used for prediction: 1 May 2023
Rainfall to date: 53.8 mm Days with significant stubble moisture: 33
| 2 May | 9 May | 16 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 |
Jacup
Last date used for prediction: 27 April 2023
Rainfall to date: 86.6 mm Days with significant stubble moisture: 27
| 2 May | 9 May | 16 May |
| 7% spores released - blackspot risk high | 19% spores released - blackspot risk high | 34% spores released - blackspot risk medium |
| Do not sow | Do not sow | Do not sow |
Katanning
Last date used for prediction: 1 May 2023
Rainfall to date: 54.8 mm Days with significant stubble moisture: 40
| 2 May | 9 May | 16 May |
| 31% spores released - blackspot risk medium | 48% spores released - blackspot risk medium | 64% spores released - blackspot risk low |
| Do not sow | Do not sow | Sow - do not sow dry |
Kojonup
Last date used for prediction: 27 April 2023
Rainfall to date: 47.2 mm Days with significant stubble moisture: 17
| 2 May | 9 May | 16 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 |
Kondinin
Last date used for prediction: 27 April 2023
Rainfall to date: 105.1 mm Days with significant stubble moisture: 23
| 2 May | 9 May | 16 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 |
Kulin
Last date used for prediction: 27 April 2023
Rainfall to date: 109 mm Days with significant stubble moisture: 26
| 2 May | 9 May | 16 May |
| 6% spores released - blackspot risk high | 17% spores released - blackspot risk high | 31% spores released - blackspot risk medium |
| Do not sow | Do not sow | Do not sow |
Lake King
Last date used for prediction: 1 May 2023
Rainfall to date: 101 mm Days with significant stubble moisture: 19
| 2 May | 9 May | 16 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: 27 April 2023
Rainfall to date: 55.4 mm Days with significant stubble moisture: 21
| 2 May | 9 May | 16 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 |
Mingenew
Last date used for prediction: 27 April 2023
Rainfall to date: 31.8 mm Days with significant stubble moisture: 12
| 2 May | 9 May | 16 May |
| 0% spores released - blackspot risk high | 1% spores released - blackspot risk high | 6% spores released - blackspot risk high |
| Do not sow | Do not sow | Do not sow |
Moora North West
Last date used for prediction: 1 May 2023
Rainfall to date: 34 mm Days with significant stubble moisture: 25
| 2 May | 9 May | 16 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 |
Mount Howick
Last date used for prediction: 1 May 2023
Rainfall to date: 108.2 mm Days with significant stubble moisture: 54
| 2 May | 9 May | 16 May |
| 66% spores released - blackspot risk low | 79% spores released - blackspot risk low | 88% spores released - blackspot risk low |
| Too early to sow before the 10th May | Too early to sow before the 10th May | Sow - do not sow dry |
Mount Madden East
Last date used for prediction: 1 May 2023
Rainfall to date: 66.2 mm Days with significant stubble moisture: 18
| 2 May | 9 May | 16 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: 27 April 2023
Rainfall to date: 112.3 mm Days with significant stubble moisture: 50
| 2 May | 9 May | 16 May |
| 66% spores released - blackspot risk low | 79% spores released - blackspot risk low | 88% 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
Last date used for prediction: 27 April 2023
Rainfall to date: 88.2 mm Days with significant stubble moisture: 32
| 2 May | 9 May | 16 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 |
Narrogin
Last date used for prediction: 27 April 2023
Rainfall to date: 116.2 mm Days with significant stubble moisture: 28
| 2 May | 9 May | 16 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 |
Newdegate
Last date used for prediction: 27 April 2023
Rainfall to date: 93.2 mm Days with significant stubble moisture: 26
| 2 May | 9 May | 16 May |
| 6% spores released - blackspot risk high | 17% spores released - blackspot risk high | 31% spores released - blackspot risk medium |
| Do not sow | Do not sow | Do not sow |
Northam
Last date used for prediction: 27 April 2023
Rainfall to date: 84 mm Days with significant stubble moisture: 22
| 2 May | 9 May | 16 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 |
Pingaring
Last date used for prediction: 1 May 2023
Rainfall to date: 151.4 mm Days with significant stubble moisture: 27
| 2 May | 9 May | 16 May |
| 7% spores released - blackspot risk high | 19% spores released - blackspot risk high | 34% spores released - blackspot risk medium |
| Do not sow | Do not sow | Do not sow |
Pingrup
Last date used for prediction: 27 April 2023
Rainfall to date: 77.5 mm Days with significant stubble moisture: 38
| 2 May | 9 May | 16 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 |
Ravensthorpe
Last date used for prediction: 1 May 2023
Rainfall to date: 88.2 mm Days with significant stubble moisture: 31
| 2 May | 9 May | 16 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 |
Salmon Gums
Last date used for prediction: 1 May 2023
Rainfall to date: 84.8 mm Days with significant stubble moisture: 45
| 2 May | 9 May | 16 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 |
Scaddan
Last date used for prediction: 1 May 2023
Rainfall to date: 49.8 mm Days with significant stubble moisture: 28
| 2 May | 9 May | 16 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: 27 April 2023
Rainfall to date: 95.1 mm Days with significant stubble moisture: 23
| 2 May | 9 May | 16 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 |
Wattening (Bolgart & Toodyay)
Last date used for prediction: 27 April 2023
Rainfall to date: 60.2 mm Days with significant stubble moisture: 19
| 2 May | 9 May | 16 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 |