Field pea blackspot management guide for Victoria - 10 May 2021

Page last updated: Thursday, 13 May 2021 - 11:17am

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 9 May 2021 from the nearest weather station.

You may notice some 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 can be influenced by BOM locations. The location that has changed is Quambatook which is now Quambatook South.

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 or implement a disease management plan based on the blackspot risk of field pea crops. The Blackspot risk will be low once the majority of blackspot spores (approximately 60%) have been released prior to the crop emergence and sowing after this date will reduce yield losses from blackspot. There are many other reasons that affect grain yield and sowing prior to a low blackspot risk can often be advantageous, therefore, it is recommended discussing individual situations with an agronomist.

Blackspot risk

Spores released (%)

Yield loss range (%)

Low

60 – 100

2 - 15

Medium

30 - 59

20 - 35

High

0 - 29

25 - 50

Avalon Airport

Rainfall to date: 199 mm      Days with significant stubble moisture: 71

Forecast for crops sown on

9 May

16 May

23 May

Spores released

90%

96%

98%

Blackspot risk

Low

Low

Low

Ballarat

Rainfall to date: 231.4 mm     Days with significant stubble moisture: 79

Forecast for crops sown on

9 May

16 May

23 May

Spores released

96%

99%

100%

Blackspot risk

Low

Low

Low

Bendigo

Rainfall to date: 191.6 mm      Days with significant stubble moisture: 55

Forecast for crops sown on

9 May

16 May

23 May

Spores released

66%

79%

88%

Blackspot risk

Low

Low

Low

Beulah West

Rainfall to date: 68.9 mm      Days with significant stubble moisture: 26

Forecast for crops sown on

9 May

16 May

23 May

Spores released

6%

17%

31%

Blackspot risk

High

High

Medium

Buln Buln

Rainfall to date: 307.2 mm      Days with significant stubble moisture: 93

Forecast for crops sown on

9 May

16 May

23 May

Spores released

100%

100%

100%

Blackspot risk

Low

Low

Low

Charlton

Rainfall to date: 109.7 mm      Days with significant stubble moisture: 35

Forecast for crops sown on

9 May

16 May

23 May

Spores released

21%

36%

53%

Blackspot risk

High

Medium

Medium

Cressy

Rainfall to date: 269.8 mm      Days with significant stubble moisture: 79

Forecast for crops sown on

9 May

16 May

23 May

Spores released

96%

99%

100%

Blackspot risk

Low

Low

Low

Derrinallum

Rainfall to date: 201 mm      Days with significant stubble moisture: 83

Forecast for crops sown on

9 May

16 May

23 May

Spores released

98%

99%

100%

Blackspot risk

Low

Low

Low

Echuca Aerodrome

Rainfall to date: 81.4 mm      Days with significant stubble moisture: 36

Forecast for crops sown on

10 May

17 May

24 May

Spores released

23%

25%

41%

Blackspot risk

High

High

Medium

Edenhope

Rainfall to date: 103.3 mm      Days with significant stubble moisture: 52

Forecast for crops sown on

9 May

16 May

23 May

Spores released

59%

74%

85%

Blackspot risk

Medium

Low

Low

Horsham

Rainfall to date: 68 mm      Days with significant stubble moisture: 41

Forecast for crops sown on

9 May

16 May

23 May

Spores released

34%

50%

66%

Blackspot risk

Medium

Medium

Low

Kerang

Rainfall to date: 83.8 mm Days with significant stubble moisture: 43

Forecast for crops sown on

10 May

17 May

24 May

Spores released

38%

43%

59%

Blackspot risk

Medium

Medium

Medium

Mildura Airport

Rainfall to date: 50.2 mm      Days with significant stubble moisture: 22

Forecast for crops sown on

9 May

16 May

23 May

Spores released

3%

10%

23%

Blackspot risk

High

High

High

Molyullah

Rainfall to date: 160.6 mm      Days with significant stubble moisture: 55

Forecast for crops sown on

9 May

16 May

23 May

Spores released

66%

79%

88%

Blackspot risk

Low

Low

Low

Nhill

Rainfall to date: 76.2 mm      Days with significant stubble moisture: 40

Forecast for crops sown on

9 May

16 May

23 May

Spores released

31%

48%

64%

Blackspot risk

Medium

Medium

Low

Quambatook South

Rainfall to date: 81.8 mm      Days with significant stubble moisture: 25

Forecast for crops sown on

9 May

16 May

23 May

Spores released

5%

15%

29%

Blackspot risk

High

High

High

Swan Hill Aerodrome

Rainfall to date: 26 mm       Days with significant stubble moisture: 23

Forecast for crops sown on

9 May

16 May

23 May

Spores released

3%

12%

25%

Blackspot risk

High

High

High

Warracknabeal Ailsa

Rainfall to date: 87.4 mm      Days with significant stubble moisture: 37

Forecast for crops sown on

9 May

16 May

23 May

Spores released

25%

41%

57%

Blackspot risk

High

Medium

Medium

Warranooke

Rainfall to date: 181.8 mm       Days with significant stubble moisture: 52

Forecast for crops sown on

9 May

16 May

23 May

Spores released

59%

74%

85%

Blackspot risk

Medium

Low

Low

Wycheproof

Rainfall to date: 76.6 mm        Days with significant stubble moisture: 31

Forecast for crops sown on

9 May

16 May

23 May

Spores released

13%

27%

43%

Blackspot risk

High

High

Medium

Yatchaw

Rainfall to date: 206.3 mm      Days with significant stubble moisture: 77

Forecast for crops sown on

9 May

16 May

23 May

Spores released

95%

98%

99%

Blackspot risk

Low

Low

Low

More information

For more information contact Dr Joshua Fanning at Agriculture Victoria Research on  +61 (0)3 4344 3335.

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Contact information

Jean Galloway
+61 (0)8 9690 2172

Author

Janette Pratt

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