Field pea blackspot management guide for Victoria - 8 May 2018

Page last updated: Thursday, 10 May 2018 - 2:33pm

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 8 May 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

Rainfall to date: 120.6mm. Days with significant stubble moisture: 45

Forecast for crops sown on 7 May 14 May 21 May
Blackspot severity 3-4 3-4 2
Sowing guide (based on agronomic suitability) Too early to sow Too early to sow Too early to sow
Blackspot risk Medium Medium Low

Benalla

Rainfall to date: 77.2mm. Days with significant stubble moisture: 44

Forecast for crops sown on 7 May 14 May 21 May
Blackspot severity 3-4 3-4 2
Sowing guide (based on agronomic suitability) Too early to sow Marginally early to sow Marginally early to sow
Blackspot risk Medium Medium Low

Charlton

Rainfall to date: 38.6mm. Days with significant stubble moisture: 25

Forecast for crops sown on 7 May 14 May 21 May
Blackspot severity 5 5 5
Sowing guide (based on agronomic suitability) Marginally early to sow Avoid sowing as risk is high Avoid sowing as risk is high
Blackspot risk High High High

Cressy

Rainfall to date: 72.9mm. Days with significant stubble moisture: 41

Forecast for crops sown on 7 May 14 May 21 May
Blackspot severity 3-4 3-4 2
Sowing guide (based on agronomic suitability) Too early to sow Marginally early to sow Marginally early to sow
Blackspot risk Medium Medium Low

Edenhope

Rainfall to date: 86mm. Days with significant stubble moisture: 46

Forecast for crops sown on 7 May 14 May 21 May
Blackspot severity 3-4 2 2
Sowing guide (based on agronomic suitability) Too early to sow Too early to sow Too early to sow
Blackspot risk Medium Low Low

Hamilton

Rainfall to date: 92.4mm. Days with significant stubble moisture: 45

Forecast for crops sown on 7 May 14 May 21 May
Blackspot severity 3-4 3-4 2
Sowing guide (based on agronomic suitability) Too early to sow Too early to sow Too early to sow
Blackspot risk Medium Medium Low

Hopetoun

Rainfall to date: 21.2mm. Days with significant stubble moisture: 7

Forecast for crops sown on 7 May 14 May 21 May
Blackspot severity 5 5 5
Sowing guide (based on agronomic suitability) Marginally early to sow Marginally early to sow Avoid sowing as risk is high
Blackspot risk High High High

Horsham

Rainfall to date: 51.8mm. Days with significant stubble moisture: 32

Forecast for crops sown on 7 May 14 May 21 May
Blackspot severity 5 5 3-4
Sowing guide (based on agronomic suitability) Too early to sow Too early to sow Marginally early to sow
Blackspot risk High High Medium

Marnoo

Rainfall to date: 43.4mm. Days with significant stubble moisture: 32

Forecast for crops sown on 7 May 14 May 21 May
Blackspot severity 5 5 3-4
Sowing guide (based on agronomic suitability) Too early to sow Too early to sow Too early to sow
Blackspot risk High High Medium

Nhill

Rainfall to date: 37.2mm. Days with significant stubble moisture: 22

Forecast for crops sown on 7 May 14 May 21 May
Blackspot severity 5 5 5
Sowing guide (based on agronomic suitability) Too early to sow Marginally early to sow Avoid sowing as risk is high
Blackspot risk High High High

Swan Hill

Rainfall to date: 34mm. Days with significant stubble moisture: 19

Forecast for crops sown on 7 May 14 May 21 May
Blackspot severity 5 5 5
Sowing guide (based on agronomic suitability) Marginally early to sow Avoid sowing as risk is high Avoid sowing as risk is high
Blackspot risk High High High

Wycheproof

Rainfall to date: 55.3mm. Days with significant stubble moisture: 32

Forecast for crops sown on 7 May 14 May 21 May
Blackspot severity 5 5 3-4
Sowing guide (based on agronomic suitability) Marginally early to sow Avoid sowing as risk is high Avoid sowing as risk is medium
Blackspot risk High High Medium

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