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 21st 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 BOM weather stations whenever possible. In some locations, a suitable weather station may not be available and so we may use interpolated weather data, which uses data from surrounding stations to create reasonable values for missing weather data.
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 (%) | Range of yield loss for different levels of blackspot risk (%) |
|---|---|---|
| Low | 60 – 100 | 2 - 15 |
| Medium | 30 - 59 | 20 - 35 |
| High | 0 - 29 | 25 - 50 |
Cootamundra
Last date used for prediction: 21 May 2023
Rainfall to date: 281 mm Days with significant stubble moisture: 81
| Forecast for crops sown on | 22 May | 29 May | 5 Jun |
| Sowing guide (based on agronomic suitability) | Marginally too early to sow - 20th May to 26th May | OK to sow | OK to sow |
| Blackspot risk | Low | Low | Low |
Forbes
Last date used for prediction: 21 May 2023
Rainfall to date: 142.1 mm Days with significant stubble moisture: 68
| Forecast for crops sown on | 22 May | 29 May | 5 Jun |
| Sowing guide (based on agronomic suitability) | OK to sow | OK to sow | OK to sow |
| Blackspot risk | Low | Low | Low |
Griffith
Last date used for prediction: 21 May 2023
Rainfall to date: 87.6 mm Days with significant stubble moisture: 41
| Forecast for crops sown on | 22 May | 29 May | 5 Jun |
| Sowing guide (based on agronomic suitability) | OK to sow | OK to sow | Getting too late to sow - after 9th June |
| Blackspot risk | Medium | Medium | Low |
Temora
Last date used for prediction: 21 May 2023
Rainfall to date: 297 mm Days with significant stubble moisture: 75
| Forecast for crops sown on | 22 May | 29 May | 5 Jun |
| Sowing guide (based on agronomic suitability) | OK to sow | OK to sow | OK to sow |
| Blackspot risk | Low | Low | Low |
Wagga Wagga AMO
Last date used for prediction: 21 May 2023
Rainfall to date: 312.4 mm Days with significant stubble moisture: 87
| Forecast for crops sown on | 22 May | 29 May | 5 Jun |
| Sowing guide (based on agronomic suitability) | Marginally too early to sow - 20th May to 26th May | OK to sow | OK to sow |
| Blackspot risk | Low | Low | Low |
More Information
For more information contact Dr Kurt Lindbeck [2] at NSW DPI on ph + 61 (0)2 6938 1608.