Field pea blackspot management guide for Western Australia - 3 June 2020

Page last updated: Friday, 5 June 2020 - 12:59pm

Please note: This content may be out of date and is currently under review.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 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. 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 1st January 2020 to 1st June 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.

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

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

Bencubbin

Rainfall to date: 119.6 mm. Days with significant stubble moisture: 53

1 June	8 June	15 June
62% spore released - blackspot risk low	75% spore released - blackspot risk low	86% spore released - blackspot risk low
Sow – do not sow dry	Sow – do not sow dry	Sow – do not sow dry

Boyup Brook

Rainfall to date: 151 mm. Days with significant stubble moisture: 48

1 June	8 June	15 June
50% spore released - blackspot risk medium	66% spore released - blackspot risk low	79% spore released - blackspot risk low
Sow – do not sow dry	Sow – do not sow dry	Sow – do not sow dry

Cunderdin

Rainfall to date: 129.2 mm. Days with significant stubble moisture: 30

1 June	8 June	15 June
12% spore released - blackspot risk high	25% spore released - blackspot risk high	41% spore released - blackspot risk medium
Do not sow	Do not sow	Do not sow

Dalwallinu

Rainfall to date: 131 mm. Days with significant stubble moisture: 38

1 June	8 June	15 June
27% spore released - blackspot risk high	43% spore released - blackspot risk medium	59% spore released - blackspot risk medium
Do not sow	Sow- do not sow dry	Sow- do not sow dry

Dowerin

Rainfall to date: 167 mm. Days with significant stubble moisture: 40

1 June	8 June	15 June
31% spore released - blackspot risk medium	48% spore released - blackspot risk medium	64% spore released - blackspot risk low
Do not sow	Sow- do not sow dry	Sow- do not sow dry

Gairdner

Rainfall to date: 93.1 mm. Days with significant stubble moisture: 60

1 June	8 June	15 June
75% spore released - blackspot risk low	86% spore released - blackspot risk low	93% spore released - blackspot risk low
Sow – do not sow dry	Sow – do not sow dry	Sow – do not sow dry

Grass Patch

Rainfall to date: 110 mm. Days with significant stubble moisture: 67

1 June	8 June	15 June
86% spore released - blackspot risk low	93% spore released - blackspot risk low	97% spore released - blackspot risk low
Sow – do not sow dry	Sow – do not sow dry	Sow – do not sow dry

Hillman

Rainfall to date: 118.1 mm. Days with significant stubble moisture: 43

1 June	8 June	15 June
38% spore released - blackspot risk medium	55% spore released - blackspot risk medium	70% spore released - blackspot risk low
Do not sow	Sow – do not sow dry	Sow – do not sow dry

Jacup

Rainfall to date: 142.2 mm. Days with significant stubble moisture: 61

1 June	8 June	15 June
77% spore released - blackspot risk low	87% spore released - blackspot risk low	94% spore released - blackspot risk low
Sow – do not sow dry	Sow – do not sow dry	Sow – do not sow dry

Katanning

Rainfall to date: 128.6 mm. Days with significant stubble moisture: 39

1 June	8 June	15 June
29% spore released - blackspot risk high	46% spore released - blackspot risk medium	62% spore released - blackspot risk low
Do not sow	Sow- do not sow dry	Sow- do not sow dry

Kojonup

Rainfall to date: 126.4 mm. Days with significant stubble moisture: 47

1 June	8 June	15 June
48% spore released - blackspot risk medium	64% spore released - blackspot risk low	77% spore released - blackspot risk low
Sow – do not sow dry	Sow – do not sow dry	Sow – do not sow dry

Kondinin

Rainfall to date: 110.9 mm. Days with significant stubble moisture: 55

1 June	8 June	15 June
66% spore released - blackspot risk low	79% spore released - blackspot risk low	88% spore released - blackspot risk low
Sow – do not sow dry	Sow – do not sow dry	Sow – do not sow dry

Kulin

Rainfall to date: 136.7 mm. Days with significant stubble moisture: 55

1 June	8 June	15 June
66% spore released - blackspot risk low	79% spore released - blackspot risk low	88% spore released - blackspot risk low
Sow – do not sow dry	Sow – do not sow dry	Sow – do not sow dry

Lake King

Rainfall to date: 110.1 mm. Days with significant stubble moisture: 60

1 June	8 June	15 June
75% spore released - blackspot risk low	86% spore released - blackspot risk low	93% spore released - blackspot risk low
Sow – do not sow dry	Sow – do not sow dry	Sow – do not sow dry

Merredin

Rainfall to date: 122.5 mm. Days with significant stubble moisture: 42

1 June	8 June	15 June
36% spore released - blackspot risk medium	53% spore released - blackspot risk medium	68% spore released - blackspot risk low
Sow –do not sow dry	Sow –do not sow dry	Sow –do not sow dry

Mingenew

Rainfall to date: 131.5 mm. Days with significant stubble moisture: 31

1 June	8 June	15 June
13% spore released - blackspot risk high	27% spore released - blackspot risk high	43% spore released - blackspot risk medium
Do not sow	Do not sow	Do not sow

Moora North West

Rainfall to date: 119.9 mm. Days with significant stubble moisture: 42

1 June	8 June	15 June
36% spore released - blackspot risk medium	53% spore released - blackspot risk medium	68% spore released - blackspot risk low
Do not sow	Sow- do not sow dry	Sow- do not sow dry

Mount Howick

Rainfall to date: 132.4 mm. Days with significant stubble moisture: 59

1 June	8 June	15 June
74% spore released - blackspot risk low	85% spore released - blackspot risk low	92% spore released - blackspot risk low
Sow – do not sow dry	Sow – do not sow dry	Sow – do not sow dry

Mt Barker

Rainfall to date: 178.5 mm. Days with significant stubble moisture: 93

1 June	8 June	15 June
100% spore released - blackspot risk low	100% spore released - blackspot risk low	100% spore released - blackspot risk low
Sow – do not sow dry	Sow – do not sow dry	Sow – do not sow dry

Mullewa

Rainfall to date: 111.4 mm. Days with significant stubble moisture: 41

1 June	8 June	15 June
34% spore released - blackspot risk medium	41% spore released - blackspot risk medium	57% spore released - blackspot risk medium
Do not sow	Sow - do not sow dry	Sow – do not sow dry

Narrogin

Rainfall to date: 122.9 mm. Days with significant stubble moisture: 49

1 June	8 June	15 June
53% spore released - blackspot risk medium	68% spore released - blackspot risk low	80% spore released - blackspot risk low
Sow – do not sow dry	Sow – do not sow dry	Sow – do not sow dry

Newdegate

Rainfall to date: 96.6 mm. Days with significant stubble moisture: 51

1 June	8 June	15 June
57% spore released - blackspot risk medium	72% spore released - blackspot risk low	83% spore released - blackspot risk low
Sow – do not sow dry	Sow – do not sow dry	Sow – do not sow dry

Northam

Rainfall to date: 97.8 mm. Days with significant stubble moisture: 43

1 June	8 June	15 June
38% spore released - blackspot risk medium	55% spore released - blackspot risk medium	70% spore released - blackspot risk low
Do not sow	Sow – do not sow dry	Sow – do not sow dry

Pingrup

Rainfall to date: 94 mm. Days with significant stubble moisture: 54

1 June	8 June	15 June
64% spore released - blackspot risk low	77% spore released - blackspot risk low	87% spore released - blackspot risk low
Sow – do not sow dry	Sow – do not sow dry	Sow – do not sow dry

Salmon Gums

Rainfall to date: 128.2 mm. Days with significant stubble moisture: 67

1 June	8 June	15 June
86% spore released - blackspot risk low	93% spore released - blackspot risk low	97% spore released - blackspot risk low
Sow – do not sow dry	Sow – do not sow dry	Sow – do not sow dry

Scaddan

Rainfall to date: 126.8 mm. Days with significant stubble moisture: 66

1 June	8 June	15 June
85% spore released - blackspot risk low	92% spore released - blackspot risk low	97% spore released - blackspot risk low
Sow – do not sow dry	Sow – do not sow dry	Sow – do not sow dry

Tammin

Rainfall to date: 109.2 mm. Days with significant stubble moisture: 35

1 June	8 June	15 June
21% spore released - blackspot risk high	36% spore released - blackspot risk medium	53% spore released - blackspot risk medium
Do not sow	Do not sow	Sow – do not sow dry

Toodyay

Rainfall to date: 99.7 mm. Days with significant stubble moisture: 47

1 June	8 June	15 June
48% spore released - blackspot risk medium	64% spore released - blackspot risk low	77% spore released - blackspot risk low
Sow- do not sow dry	Sow – do not sow dry	Sow – do not sow dry

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Jean Galloway

+61 (0)8 9690 2172

Email Jean Galloway

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Field pea blackspot management guide for Western Australia - 3 June 2020

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