Field pea blackspot management guide for Victoria - 2 May 2018

Page last updated: Thursday, 3 May 2018 - 1:33pm

Please note: This content may be out of date and is currently under review.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 30 April 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: 108.6mm. Days with significant stubble moisture: 41

Forecast for crops sown on	30 April	7 May	14 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: 62.3mm. Days with significant stubble moisture: 40

Forecast for crops sown on	30 April	7 May	14 May
Blackspot severity	3-4	3-4	3-4
Sowing guide (based on agronomic suitability)	Too early to sow	Too early to sow	Marginally early to sow
Blackspot risk	Medium	Medium	Medium

Charlton

Rainfall to date: 27.6mm. Days with significant stubble moisture: 21

Forecast for crops sown on	30 April	7 May	14 May
Blackspot severity	5	5	5
Sowing guide (based on agronomic suitability)	Marginally early to sow	Marginally early to sow	Do not sow as risk is high
Blackspot risk	High	High	High

Cressy

Rainfall to date: 74.3mm. Days with significant stubble moisture: 43

Forecast for crops sown on	30 April	7 May	14 May
Blackspot severity	3-4	3-4	2
Sowing guide (based on agronomic suitability)	Too early to sow	Too early to sow	Marginally early to sow
Blackspot risk	Medium	Medium	Low

Edenhope

Rainfall to date: 56.5mm. Days with significant stubble moisture: 41

Forecast for crops sown on	30 April	7 May	14 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

Hamilton

Rainfall to date: 73.5mm. Days with significant stubble moisture: 37

Forecast for crops sown on	30 April	7 May	14 May
Blackspot severity	5	3-4	3-4
Sowing guide (based on agronomic suitability)	Too early to sow	Too early to sow	Too early to sow
Blackspot risk	High	Medium	Medium

Hopetoun

Rainfall to date: 12mm. Days with significant stubble moisture: 3

Forecast for crops sown on	30 April	7 May	14 May
Blackspot severity	5	5	5
Sowing guide (based on agronomic suitability)	Too early to sow	Marginally early to sow	Marginally early to sow
Blackspot risk	High	High	High

Horsham

Rainfall to date: 41.9mm. Days with significant stubble moisture: 28

Forecast for crops sown on	30 April	7 May	14 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

Marnoo

Rainfall to date: 31.6mm. Days with significant stubble moisture: 28

Forecast for crops sown on	30 April	7 May	14 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: 27.2mm. Days with significant stubble moisture: 18

Forecast for crops sown on	30 April	7 May	14 May
Blackspot severity	5	5	5
Sowing guide (based on agronomic suitability)	Too early to sow	Too early to sow	Marginally early to sow
Blackspot risk	High	High	High

Swan Hill

Rainfall to date: 23.9mm. Days with significant stubble moisture: 15

Forecast for crops sown on	30 April	7 May	14 May
Blackspot severity	5	5	5
Sowing guide (based on agronomic suitability)	Too early to sow	Marginally early to sow	Do not sow as risk is high
Blackspot risk	High	High	High

Wycheproof

Rainfall to date: 33.2mm. Days with significant stubble moisture: 28

Forecast for crops sown on	30 April	7 May	14 May
Blackspot severity	5	5	3-4
Sowing guide (based on agronomic suitability)	Too early to sow	Marginally early to sow	Do not sow 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.

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