Field pea blackspot management guide for Victoria - 13 June 2018

Page last updated: Tuesday, 19 June 2018 - 8:41am

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 13 June 2018 from the nearest weather station.

Key to blackspot severity scores

Percentage yield loss (in years) for different levels of blackspot risk scenarios
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: 12 June 2018. Rainfall to date: 202.6mm
Days with significant stubble moisture: 76

Forecast for crops sown on 12 June 19 June 26 June
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: 12 June 2018. Rainfall to date: 131.9mm
Days with significant stubble moisture: 66

Forecast for crops sown on 12 June 19 June 26 June
Blackspot severity 1 1 1
Sowing guide (based on agronomic suitability) Sow Sow Sow
Blackspot risk Low Low Low

Charlton

Last date used for prediction: 12 June 2018. Rainfall to date: 92mm
Days with significant stubble moisture: 47

Forecast for crops sown on 12 June 19 June 26 June
Blackspot severity 3-4 2 2
Sowing guide (based on agronomic suitability) Agronomically suitable sowing time, but note blackspot risk is still medium Sow No longer optimal to sow
Blackspot risk Medium Low Low

Cressy

Last date used for prediction: 12 June 2018. Rainfall to date: 121.3mm
Days with significant stubble moisture: 66

Forecast for crops sown on 12 June 19 June 26 June
Blackspot severity 1 1 1
Sowing guide (based on agronomic suitability) Sow Sow No longer optimal to sow
Blackspot risk Low Low Low

Edenhope

Last date used for prediction: 12 June 2018. Rainfall to date: 162.9mm
Days with significant stubble moisture: 76

Forecast for crops sown on 12 June 19 June 26 June
Blackspot severity 1 1 1
Sowing guide (based on agronomic suitability) Marginally early to sow Sow Sow
Blackspot risk Low Low Low

Hamilton

Last date used for prediction: 12 June 2018. Rainfall to date: 181.7mm
Days with significant stubble moisture: 73

Forecast for crops sown on 12 June 19 June 26 June
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: 12 June 2018. Rainfall to date: 50.7mm
Days with significant stubble moisture: 22

Forecast for crops sown on 12 June 19 June 26 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

Last date used for prediction: 12 June 2018. Rainfall to date: 101.1mm
Days with significant stubble moisture: 59

Forecast for crops sown on 12 June 19 June 26 June
Blackspot severity 2 1 1
Sowing guide (based on agronomic suitability) Sow Sow

No longer optimal to sow

Blackspot risk Low Low Low

Marnoo

Last date used for prediction: 12 June 2018. Rainfall to date: 92.9mm
Days with significant stubble moisture: 55

Forecast for crops sown on 12 June 19 June 26 June
Blackspot severity 2 2 1
Sowing guide (based on agronomic suitability) Sow Sow Sow
Blackspot risk Low Low Low

Nhill

Last date used for prediction: 12 June 2018. Rainfall to date: 77.7mm
Days with significant stubble moisture: 47

Forecast for crops sown on 12 June 19 June 26 June
Blackspot severity 3-4 2 2
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: 12 June 2018. Rainfall to date: 66.2mm
Days with significant stubble moisture: 34

Forecast for crops sown on 12 June 19 June 26 June
Blackspot severity 5 3-4 3-4
Sowing guide (based on agronomic suitability) Agronomically suitable sowing time, but note blackspot risk is still high No longer optimal to sow, but note blackspot risk is still medium No longer optimal to sow, but note blackspot risk is still medium
Blackspot risk High Medium Medium

Wycheproof

Last date used for prediction: 12 June 2018. Rainfall to date: 95mm
Days with significant stubble moisture: 54

Forecast for crops sown on 12 June 19 June 26 June
Blackspot severity 2 2 1
Sowing guide (based on agronomic suitability) Sow No longer optimal to sow No longer optimal to sow
Blackspot risk Low Low Low

More information

For more information, contact Luise Sigel (plant pathologist) at Agriculture Victoria on +61 (0)3 5362 2111.

Agriculture Victoria

Contact information

Jean Galloway
+61 (0)8 9690 2172

Author

Kawsar Salam

Funding bodies