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 2018 to 30 April 2018 from the nearest weather station.
Key to blackspot severity scores
| Blackspot risk | Five out of 10 years | Three out of 10 years | One out of 10 years |
|---|---|---|---|
| Low | 2 | 5 | 15 |
| Medium | 20 | 25 | 35 |
| High | 25 | 30 | 50 |
Cootamundra
Rainfall to date: 99.1mm Days with significant stubble moisture: 41
| Forecast for crops sown on | 30 Apr | 7 May | 14 May |
|---|---|---|---|
| Blackspot severity | 3-4 | 3-4 | 2 |
| Sowing guide (based on agronomic suitability) | Too early to sow - before 19 May | Too early to sow - before 19 May | Too early to sow - before 19 May |
| Blackspot risk | Medium | Medium | Low |
Griffith
Rainfall to date: 22.8mm. Days with significant stubble moisture: 21
| Forecast for crops sown on | 30 Apr | 7 May | 14 May |
|---|---|---|---|
| Blackspot severity | 5 | 5 | 5 |
| Sowing guide (based on agronomic suitability) | Too early to sow - before 5 May | Marginally too early to sow - 7-12 May | Marginally too early to sow - 7-12 May |
| Blackspot risk | High | High | High |
Temora
Rainfall to date: 97.2mm. Days with significant stubble moisture: 46
| Forecast for crops sown on | 30 Apr | 7 May | 14 May |
|---|---|---|---|
| Blackspot severity | 3-4 | 3-4 | 2 |
| Sowing guide (based on agronomic suitability) | Too early to sow - before 12 May | Too early to sow - before 12 May | Too early to sow - before 12 May |
| Blackspot risk | Medium | Medium | Low |
Wagga Ag Institute
Rainfall to date: 119.1mm. Days with significant stubble moisture: 43
| Forecast for crops sown on | 30 Apr | 7 May | 14 May |
|---|---|---|---|
| Blackspot severity | 3-4 | 3-4 | 2 |
| Sowing guide (based on agronomic suitability) | Too early to sow - before 19 May | Too early to sow - before 19 May | Too early to sow - before 19 May |
| Blackspot risk | Medium | Medium | Low |
More information
For more information contact Dr Kurt Lindbeck [1] at NSW DPI on ph +61 (0)2 6938 1608.
[2]