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 27 May 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 |
Ballarat
Rainfall to date: 172.6mm. Days with significant stubble moisture: 65
| Forecast for crops sown on | 27 May | 3 June | 10 June |
|---|---|---|---|
| Blackspot severity | 1 | 1 | 1 |
| Sowing guide (based on agronomic suitability) | Marginally early to sow | Sow | Sow |
| Blackspot risk | Low | Low | Low |
Benalla
Rainfall to date: 88.9mm. Days with significant stubble moisture: 54
| Forecast for crops sown on | 27 May | 3 June | 10 June |
|---|---|---|---|
| Blackspot severity | 2 | 2 | 1 |
| Sowing guide (based on agronomic suitability) | Sow | Sow | Sow |
| Blackspot risk | Low | Low | Low |
Charlton
Rainfall to date: 45.5mm. Days with significant stubble moisture: 34
| Forecast for crops sown on | 27 May | 3 June | 10 June |
|---|---|---|---|
| Blackspot severity | 5 | 5 | 3-4 |
| Sowing guide (based on agronomic suitability) | Agronomically suitable sowing time, but note blackspot risk is still high | Agronomically suitable sowing time, but note blackspot risk is still medium | Agronomically suitable sowing time, but note blackspot risk is still medium |
| Blackspot risk | High | High | Medium |
Cressy
Rainfall to date: 110.7mm. Days with significant stubble moisture: 59
| Forecast for crops sown on | 27 May | 3 June | 10 June |
|---|---|---|---|
| Blackspot severity | 2 | 1 | 1 |
| Sowing guide (based on agronomic suitability) | Marginally early to sow | Sow | Sow |
| Blackspot risk | Low | Low | Low |
Edenhope
Rainfall to date: 122.6mm. Days with significant stubble moisture: 66
| Forecast for crops sown on | 27 May | 3 June | 10 June |
|---|---|---|---|
| Blackspot severity | 1 | 1 | 1 |
| Sowing guide (based on agronomic suitability) | Marginally early to sow | Sow | Sow |
| Blackspot risk | Low | Low | Low |
Hamilton
Rainfall to date: 158.4mm. Days with significant stubble moisture: 65
| Forecast for crops sown on | 27 May | 3 June | 10 June |
|---|---|---|---|
| Blackspot severity | 1 | 1 | 1 |
| Sowing guide (based on agronomic suitability) | Marginally early to sow | Sow | Sow |
| Blackspot risk | Low | Low | Low |
Hopetoun
Rainfall to date: 24.5mm. Days with significant stubble moisture: 11
| Forecast for crops sown on | 27 May | 3 June | 10 June |
|---|---|---|---|
| Blackspot severity | 5 | 5 | 5 |
| Sowing guide (based on agronomic suitability) | Agronomically suitable sowing time, but note blackspot risk is still high | Agronomically suitable sowing time, but note blackspot risk is still high | Agronomically suitable sowing time, but note blackspot risk is still high |
| Blackspot risk | High | High | High |
Horsham
Rainfall to date: 69.5mm. Days with significant stubble moisture: 46
| Forecast for crops sown on | 27 May | 3 June | 10 June |
|---|---|---|---|
| Blackspot severity | 3-4 | 3-4 | 2 |
| Sowing guide (based on agronomic suitability) | Agronomically suitable sowing time, but note blackspot risk is still medium | Agronomically suitable sowing time, but note blackspot risk is still medium | Sow |
| Blackspot risk | Medium | Medium | Low |
Marnoo
Rainfall to date: 56.9mm. Days with significant stubble moisture: 42
| Forecast for crops sown on | 27 May | 3 June | 10 June |
|---|---|---|---|
| Blackspot severity | 3-4 | 3-4 | 2 |
| Sowing guide (based on agronomic suitability) | Agronomically suitable sowing time, but note blackspot risk is still medium | Agronomically suitable sowing time, but note blackspot risk is still medium | Sow |
| Blackspot risk | Medium | Medium | Low |
Nhill
Rainfall to date: 52.7mm. Days with significant stubble moisture: 34
| Forecast for crops sown on | 27 May | 3 June | 10 June |
|---|---|---|---|
| Blackspot severity | 5 | 5 | 3-4 |
| Sowing guide (based on agronomic suitability) | Agronomically suitable sowing time, but note blackspot risk is still high | Agronomically suitable sowing time, but note blackspot risk is still high | Agronomically suitable sowing time, but note blackspot risk is still medium |
| Blackspot risk | High | High | Medium |
Swan Hill
Rainfall to date: 36.1mm. Days with significant stubble moisture: 22
| Forecast for crops sown on | 27 May | 3 June | 10 June |
|---|---|---|---|
| Blackspot severity | 5 | 5 | 5 |
| Sowing guide (based on agronomic suitability) | Agronomically suitable sowing time, but note blackspot risk is still high | Agronomically suitable sowing time, but note blackspot risk is still high | Agronomically suitable sowing time, but note blackspot risk is still high |
| Blackspot risk | High | High | High |
Wycheproof
Rainfall to date: 63.2mm. Days with significant stubble moisture: 42
| Forecast for crops sown on | 27 May | 3 June | 10 June |
|---|---|---|---|
| Blackspot severity | 3-4 | 3-4 | 2 |
| Sowing guide (based on agronomic suitability) | Agronomically suitable sowing time, but note blackspot risk is still medium | Agronomically suitable sowing time, but note blackspot risk is still medium | Sow |
| Blackspot risk | Medium | Medium | Low |
More information
For more information, contact Luise Sigel [1] (plant pathologist) at Agriculture Victoria on +61 (0)3 5362 2111.
[2]