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 the Department of Primary Industries and Regional Development's Blackspot Manager model using weather data from 1 January 2018 to 18 June 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
Last date used for prediction: 17 June 2018. Rainfall to date: 230.2mm
Days with significant stubble moisture: 81
| Forecast for crops sown on | 17 June | 24 June | 1 July |
|---|---|---|---|
| Blackspot severity | 1 | 1 | 1 |
| Sowing guide (based on agronomic suitability) | Sow | Sow | Sow |
| Blackspot risk | Low | Low | Low |
Benalla
Last date used for prediction: 17 June 2018. Rainfall to date: 150.3mm
Days with significant stubble moisture: 71
| Forecast for crops sown on | 17 June | 24 June | 1 July |
|---|---|---|---|
| Blackspot severity | 1 | 1 | 1 |
| Sowing guide (based on agronomic suitability) | Sow | Sow | Past optimum time to sow |
| Blackspot risk | Low | Low | Low |
Charlton
Last date used for prediction: 17 June 2018. Rainfall to date: 101.9mm
Days with significant stubble moisture: 52
| Forecast for crops sown on | 17 June | 24 June | 1 July |
|---|---|---|---|
| Blackspot severity | 3-4 | 2 | 1 |
| Sowing guide (based on agronomic suitability) | Agronomically suitable sowing time, but note blackspot risk is still medium | Past optimum time to sow | Past optimum time to sow |
| Blackspot risk | Medium | Low | Low |
Cressy
Last date used for prediction: 17 June 2018. Rainfall to date: 150.2mm
Days with significant stubble moisture: 69
| Forecast for crops sown on | 17 June | 24 June | 1 July |
|---|---|---|---|
| Blackspot severity | 1 | 1 | 1 |
| Sowing guide (based on agronomic suitability) | Sow | Past optimum time to sow | Past optimum time to sow |
| Blackspot risk | Low | Low | Low |
Edenhope
Last date used for prediction: 17 June 2018. Rainfall to date: 195.5mm
Days with significant stubble moisture: 81
| Forecast for crops sown on | 17 June | 24 June | 1 July |
|---|---|---|---|
| Blackspot severity | 1 | 1 | 1 |
| Sowing guide (based on agronomic suitability) | Sow | Sow | Sow |
| Blackspot risk | Low | Low | Low |
Hamilton
Last date used for prediction: 17 June 2018. Rainfall to date: 226.7mm
Days with significant stubble moisture: 79
| Forecast for crops sown on | 17 June | 24 June | 1 July |
|---|---|---|---|
| Blackspot severity | 1 | 1 | 1 |
| Sowing guide (based on agronomic suitability) | Sow | Sow | Sow |
| Blackspot risk | Low | Low | Low |
Hopetoun
Last date used for prediction: 17 June 2018. Rainfall to date: 60.9mm
Days with significant stubble moisture: 27
| Forecast for crops sown on | 17 June | 24 June | 1 July |
|---|---|---|---|
| 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
Last date used for prediction: 17 June 2018. Rainfall to date: 115.4mm
Days with significant stubble moisture: 64
| Forecast for crops sown on | 17 June | 24 June | 1 July |
|---|---|---|---|
| Blackspot severity | 1 | 1 | 1 |
| Sowing guide (based on agronomic suitability) | Sow | Past optimum time to sow | Past optimum time to sow |
| Blackspot risk | Low | Low | Low |
Marnoo
Last date used for prediction: 17 June 2018. Rainfall to date: 103.8mm
Days with significant stubble moisture: 60
| Forecast for crops sown on | 17 June | 24 June | 1 July |
|---|---|---|---|
| Blackspot severity | 2 | 1 | 1 |
| Sowing guide (based on agronomic suitability) | Sow | Sow | Past optimum time to sow |
| Blackspot risk | Low | Low | Low |
Nhill
Last date used for prediction: 17 June 2018. Rainfall to date: 99mm
Days with significant stubble moisture: 52
| Forecast for crops sown on | 17 June | 24 June | 1 July |
|---|---|---|---|
| Blackspot severity | 3 to 4 | 2 | 1 |
| Sowing guide (based on agronomic suitability) | Agronomically suitable sowing time, but note blackspot risk is still medium | Sow | Sow |
| Blackspot risk | Medium | Low | Low |
Swan Hill
Last date used for prediction: 17 June 2018. Rainfall to date: 72.9mm
Days with significant stubble moisture: 39
| Forecast for crops sown on | 17 June | 24 June | 1 July |
|---|---|---|---|
| Blackspot severity | 5 | 3-4 | 2 |
| Sowing guide (based on agronomic suitability) | Agronomically suitable sowing time, but note blackspot risk is still high | Past optimal to sow, but note blackspot risk is still medium | Past optimum time to sow |
| Blackspot risk | High | Medium | Low |
Wycheproof
Last date used for prediction: 17 June 2018. Rainfall to date: 102.2mm
Days with significant stubble moisture: 59
| Forecast for crops sown on | 17 June | 24 June | 1 July |
|---|---|---|---|
| Blackspot severity | 2 | 1 | 1 |
| Sowing guide (based on agronomic suitability) | Past optimal time to sow | Past optimal time to sow | Past optimal time to sow |
| Blackspot risk | Low | Low | Low |
More information
For more information, contact Luise Sigel [1] (plant pathologist) at Agriculture Victoria on +61 (0)3 5362 2111.
[2]