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 spores 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. Field pea crops should be sown so that the majority of blackspot spores (approximately 60%) have been released prior to the crop emergence.
This prediction is based on DPIRD's Blackspot Manager model using weather data from 1 January 2019 to 5 May 2019 from the nearest weather station.
Key to blackspot severity scores
| Blackspot risk | 5 out of 10 years | 3 out of 10 years | 1 out of 10 years |
| Low | 2 | 5 | 15 |
| Medium | 20 | 25 | 35 |
| High | 25 | 30 | 50 |
Cootamundra
Rainfall to date: 196.5mm Days with significant stubble moisture: 57
| Forecast for crops sown on | 5 May | 12 May | 19 May |
|---|---|---|---|
| Blackspot severity | 2 | 1 | 1 |
| Sowing guide (based on agronomic suitability) | Too early to sow – before 19th May | Too early to sow – before 19th May | Too early to sow – before 19th May |
| Blackspot risk | Low | Low | Low |
Griffith
Rainfall to date: 141.8mm Days with significant stubble moisture: 44
| Forecast for crops sown on | 5 May | 12 May | 19 May |
|---|---|---|---|
| Blackspot severity | 3 to 4 | 3 to 4 | 2 |
| Sowing guide (based on agronomic suitability) | Marginally too early to sow - 7th May -12th May | Marginally too early to sow - 7th May -12th May | Getting too late to sow - after 9th June |
| Blackspot risk | Medium | Medium | Low |
Temora
Rainfall to date: 186.9mm Days with significant stubble moisture: 54
| Forecast for crops sown on | 5 May | 12 May | 19 May |
|---|---|---|---|
| Blackspot severity | 2 | 2 | 1 |
| Sowing guide (based on agronomic suitability) | Marginally too early to sow - 13th May - 19th May | Marginally too early to sow - 13th May - 19th May | Getting too late to sow - after 16th June |
| Blackspot risk | Low | Low | Low |
Wagga Ag Institute
Rainfall to date: 130.9mm Days with significant stubble moisture: 64
| Forecast for crops sown on | 5 May | 12 May | 19 May |
|---|---|---|---|
| Blackspot severity | 1 | 1 | 1 |
| Sowing guide (based on agronomic suitability) | Too early to sow – before 19th May | Too early to sow – before 19th May | Marginally too early to sow - 20th May - 26th May |
| Blackspot risk | Low | Low | Low |
More Information
For more information contact Dr Kurt Lindbeck [1] at NSW DPI on ph +61 (0)2 6938 1608.
[2]