Field pea blackspot management guide for Victoria - 13 June 2018

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

Please note: This content may be out of date and is currently under review.

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.

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