Field pea blackspot management guide for southern New South Wales - 19 May 2020

Page last updated: Thursday, 21 May 2020 - 4:12pm

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 2020 to 18 May 2020 from the nearest weather station.

Sowing time can depend on a range of factors and it is recommended to consult an agronomist to determine the optimal sowing window for your situation.

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Key to blackspot severity scores

Percentage yield loss (in years) for different levels of blackspot risk scenarios

Blackspot risk

5 out of 10 years

3 out of 10 years

1 out of 10 years

Low

2

5

15

Medium

20

25

35

High

25

30

50

Cootamundra

Rainfall to date: 291.4 mm.  Days with significant stubble moisture: 69

Forecast for crops sown on

18 May

25 May

1 June

Blackspot severity

1

1

1

Sowing guide (based on agronomic suitability)

Too early to sow before the 20th May

Marginally too early to sow - 20th May to 26th May

OK to sow

Blackspot risk

Low

Low

Low

Forbes

Rainfall to date: 389.8 mm.  Days with significant stubble moisture: 62

Forecast for crops sown on

18 May

25 May

1 June

Blackspot severity

2

1

1

Sowing guide (based on agronomic suitability)

Marginally too early to sow - 13th May to 19th May

OK to sow

OK to sow

Blackspot risk

Low

Low

Low

Griffith

Rainfall to date: 255.2 mm.  Days with significant stubble moisture: 56

Forecast for crops sown on

18 May

25 May

1 June

Blackspot severity

2

2

1

Sowing guide (based on agronomic suitability)

OK to sow

OK to sow

OK to sow

Blackspot risk

Low

Low

Low

Temora

Rainfall to date: 300.7 mm.  Days with significant stubble moisture: 65

Forecast for crops sown on

18 May

25 May

1 June

Blackspot severity

1

1

1

Sowing guide (based on agronomic suitability)

Marginally too early to sow - 13th May to 19th May

OK to sow

OK to sow

Blackspot risk

Low

Low

Low

Wagga Ag Institute

Rainfall to date: 230.8 mm.  Days with significant stubble moisture: 59

Forecast for crops sown on

18 May

25 May

1 June

Blackspot severity

2

2

1

Sowing guide (based on agronomic suitability)

Too early to sow before the 20th May

Marginally too early to sow - 20th May to 26th May

OK to sow

Blackspot risk

Low

Low

Low

More information

For more information contact Dr Kurt Lindbeck at NSW DPI on ph +61 (0)2 6938 1608.

NSW DPI logo

Contact information

Jean Galloway
+61 (0)8 9690 2172

Author

Kawsar Salam

Funding bodies