Field pea blackspot management guide for New South Wales - 16 May 2023

Page last updated: Tuesday, 16 May 2023 - 2:44pm

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 spore 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.

This prediction is based on DPIRD's Blackspot Manager model using weather data from 1st January 2023 to 15th May 2023 from the nearest weather station.

You may notice weather station changes for some locations. This is to ensure that the weather data being used is the most accurate available for the area and uses open BOM weather stations whenever possible. In some locations, a suitable weather station may not be available and so we may use interpolated weather data, which uses data from surrounding stations to create reasonable values for missing weather data.

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.

Missing a location or would like to receive email or sms alerts?

Sign up today to get alerts and add your local weather station. Text 'blackspot', your name and nearest weather station to 0475 959 932 or email BlackspotManager@dpird.wa.gov.au.

Key to blackspot severity scores

The aim is to delay sowing of field pea crops, where agronomically possible, until the majority of blackspot spores (approximately 60%) have been released prior to the crop emergence. This strategy reduces yield losses from blackspot.

Blackspot risk

Spores released (%)

Range of yield loss for different levels of blackspot risk (%)

Low

60 – 100

2 - 15

Medium

30 - 59

20 - 35

High

0 - 29

25 - 50

Cootamundra

Last date used for prediction: 15 May 2023
Rainfall to date: 279.8 mm Days with significant stubble moisture: 81

Forecast for crops sown on

16 May

23 May

30 May

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

Last date used for prediction: 15 May 2023
Rainfall to date: 141.6 mm Days with significant stubble moisture: 68

Forecast for crops sown on

16 May

23 May

30 May

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

Last date used for prediction: 15 May 2023
Rainfall to date: 87.6 mm Days with significant stubble moisture: 41

Forecast for crops sown on

16 May

23 May

30 May

Sowing guide (based on agronomic suitability)

OK to sow

OK to sow

OK to sow

Blackspot risk

Medium

Medium

Low

Temora

Last date used for prediction: 15 May 2023
Rainfall to date: 296.3 mm Days with significant stubble moisture: 75

Forecast for crops sown on

16 May

23 May

30 May

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 Wagga AMO

Last date used for prediction: 15 May 2023
Rainfall to date: 311.2 mm Days with significant stubble moisture: 87

Forecast for crops sown on

16 May

23 May

30 May

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.

Author

Janette Pratt

Funding bodies