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 2 May 2021 from the nearest weather station.
You may notice some 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 can be influenced by BOM locations. The location that has changed is Quambatook which is now Quambatook South.
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 or implement a disease management plan based on the blackspot risk of field pea crops. The Blackspot risk will be low once the majority of blackspot spores (approximately 60%) have been released prior to the crop emergence and sowing after this date will reduce yield losses from blackspot. There are many other reasons that affect grain yield and sowing prior to a low blackspot risk can often be advantageous, therefore, it is recommended discussing individual situations with an agronomist.
| Blackspot risk | Spores released (%) | Yield loss range (%) |
|---|---|---|
| Low | 60 – 100 | 2 - 15 |
| Medium | 30 - 59 | 20 - 35 |
| High | 0 - 29 | 25 - 50 |
Avalon Airport
Rainfall to date: 154.2 mm Days with significant stubble moisture: 65
| Forecast for crops sown on | 2 May | 9 May | 16 May |
|---|---|---|---|
| Spores released | 83% | 91% | 96% |
| Blackspot risk | Low | Low | Low |
Ballarat
Rainfall to date: 204.8 mm Days with significant stubble moisture: 73
| Forecast for crops sown on | 2 May | 9 May | 16 May |
|---|---|---|---|
| Spores released | 92% | 97% | 99% |
| Blackspot risk | Low | Low | Low |
Bendigo
Rainfall to date: 173 mm Days with significant stubble moisture: 49
| Forecast for crops sown on | 2 May | 9 May | 16 May |
|---|---|---|---|
| Spores released | 53% | 68% | 80% |
| Blackspot risk | Medium | Low | Low |
Beulah West
Rainfall to date: 67.4 mm Days with significant stubble moisture: 26
| Forecast for crops sown on | 2 May | 9 May | 16 May |
|---|---|---|---|
| Spores released | 6% | 17% | 31% |
| Blackspot risk | High | High | Medium |
Buln Buln
Rainfall to date: 294.6 mm Days with significant stubble moisture: 86
| Forecast for crops sown on | 2 May | 9 May | 16 May |
|---|---|---|---|
| Spores released | 99% | 100% | 100% |
| Blackspot risk | Low | Low | Low |
Charlton
Rainfall to date: 97 mm Days with significant stubble moisture: 30
| Forecast for crops sown on | 2 May | 9 May | 16 May |
|---|---|---|---|
| Spores released | 12% | 25% | 41% |
| Blackspot risk | High | High | Medium |
Cressy
Rainfall to date: 250.4 mm Days with significant stubble moisture: 73
| Forecast for crops sown on | 2 May | 9 May | 16 May |
|---|---|---|---|
| Spores released | 92% | 97% | 99% |
| Blackspot risk | Low | Low | Low |
Derrinallum
Rainfall to date: 182.2 mm Days with significant stubble moisture: 77
| Forecast for crops sown on | 2 May | 9 May | 16 May |
|---|---|---|---|
| Spores released | 95% | 98% | 99% |
| Blackspot risk | Low | Low | Low |
Edenhope
Rainfall to date: 98.8 mm Days with significant stubble moisture: 51
| Forecast for crops sown on | 2 May | 9 May | 16 May |
|---|---|---|---|
| Spores released | 57% | 72% | 83% |
| Blackspot risk | Medium | Low | Low |
Horsham
Rainfall to date: 65.2 mm Days with significant stubble moisture: 41
| Forecast for crops sown on | 2 May | 9 May | 16 May |
|---|---|---|---|
| Spores released | 34% | 50% | 66% |
| Blackspot risk | Medium | Medium | Low |
Mildura Airport
Rainfall to date: 50 mm Days with significant stubble moisture: 22
| Forecast for crops sown on | 2 May | 9 May | 16 May |
|---|---|---|---|
| Spores released | 3% | 10% | 23% |
| Blackspot risk | High | High | High |
Molyullah
Rainfall to date: 150 mm Days with significant stubble moisture: 40
| Forecast for crops sown on | 2 May | 9 May | 16 May |
|---|---|---|---|
| Spores released | 31% | 48% | 64% |
| Blackspot risk | Medium | Medium | Low |
Nhill
Rainfall to date: 75.2 mm Days with significant stubble moisture: 40
| Forecast for crops sown on | 2 May | 9 May | 16 May |
|---|---|---|---|
| Spores released | 31% | 48% | 64% |
| Blackspot risk | Medium | Medium | Low |
Quambatook South
Rainfall to date: 68.2 mm Days with significant stubble moisture: 19
| Forecast for crops sown on | 2 May | 9 May | 16 May |
|---|---|---|---|
| Spores released | 1% | 6% | 17% |
| Blackspot risk | High | High | High |
Swan Hill Aerodrome
Rainfall to date: 20.6 mm Days with significant stubble moisture: 18
| Forecast for crops sown on | 2 May | 9 May | 16 May |
|---|---|---|---|
| Spores released | 1% | 5% | 15% |
| Blackspot risk | High | High | High |
Warracknabeal Ailsa
Rainfall to date: 86.7 mm Days with significant stubble moisture: 38
| Forecast for crops sown on | 2 May | 9 May | 16 May |
|---|---|---|---|
| Spores released | 27% | 43% | 59% |
| Blackspot risk | High | Medium | Medium |
Warranooke
Rainfall to date: 176.6 mm Days with significant stubble moisture: 46
| Forecast for crops sown on | 2 May | 9 May | 16 May |
|---|---|---|---|
| Spores released | 46% | 62% | 75% |
| Blackspot risk | Medium | Low | Low |
Wycheproof
Rainfall to date: 64.8 mm Days with significant stubble moisture: 25
| Forecast for crops sown on | 2 May | 9 May | 16 May |
|---|---|---|---|
| Spores released | 5% | 15% | 29% |
| Blackspot risk | High | High | High |
Yatchaw
Rainfall to date: 191.4 mm Days with significant stubble moisture: 72
| Forecast for crops sown on | 2 May | 9 May | 16 May |
|---|---|---|---|
| Spores released | 91% | 96% | 99% |
| Blackspot risk | Low | Low | Low |
More information
For more information contact Dr Joshua Fanning [2] at Agriculture Victoria Research on +61 (0)3 4344 3335.
[3]