Field pea blackspot management guide for New South Wales - 3 May 2021

Page last updated: Tuesday, 4 May 2021 - 2:22pm

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 1 January 2021 to 2 May 2021 from the nearest weather station.

You may notice weather station changes for one location, this is to ensure that the weather data being used is the most accurate available for the area, and can be influenced by BOM locations. The location that has changed is Wagga Ag Institute which now is Wagga Wagga AMO.

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

Rainfall to date: 301.8 mm Days with significant stubble moisture: 58

Forecast for crops sown on

2 May

9 May

16 May

Sowing guide (based on agronomic suitability)

Too early to sow before the 20th May

Too early to sow before the 20th May

Too early to sow before the 20th May

Blackspot risk

Low

Low

Low

Forbes

Rainfall to date: 437.8 mm Days with significant stubble moisture: 61

Forecast for crops sown on

2 May

9 May

16 May

Sowing guide (based on agronomic suitability)

Too early to sow before the 13th May

Too early to sow before the 13th May

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

Blackspot risk

Low

Low

Low

Griffith

Rainfall to date: 154.2 mm Days with significant stubble moisture: 37

Forecast for crops sown on

2 May

9 May

16 May

Sowing guide (based on agronomic suitability)

Too early to sow before the 5th May

Marginally too early to sow - 5th May to 12th May

OK to sow

Blackspot risk

High

Medium

Medium

Temora

Rainfall to date: 313.6 mm Days with significant stubble moisture: 51

Forecast for crops sown on

2 May

9 May

16 May

Sowing guide (based on agronomic suitability)

Too early to sow before the 13th May

Too early to sow before the 13th May

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

Blackspot risk

Medium

Low

Low

Wagga Wagga AMO

Rainfall to date: 322.2 mm Days with significant stubble moisture: 46

Forecast for crops sown on

2 May

9 May

16 May

Sowing guide (based on agronomic suitability)

Too early to sow before the 20th May

Too early to sow before the 20th May

Too early to sow before the 20th May

Blackspot risk

Medium

Low

Low

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Contact information

Jean Galloway
+61 (0)8 9690 2172

Author

Janette Pratt

Funding bodies