Field pea blackspot management guide for Western Australia - 17 June 2020

Page last updated: Monday, 22 June 2020 - 9:46am

Please note: This content may be out of date and is currently under review.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 1 January 2020 to 15 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.

Only using BoM sites. No suitable BoM site for Grass Patch. Replacement sites are used for Katanning, Moora West, Mount Howick, Salmon Gums, and Scaddan West.

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: 129.7 mm. Days with significant stubble moisture: 61

15 June	22 June	29 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

Boyup Brook

Rainfall to date: 186.2 mm. Days with significant stubble moisture: 59

15 June	22 June	29 June
74% spore released - blackspot risk low	83% spore released - blackspot risk low	91% spore released - blackspot risk low
Sow – do not sow dry	Sow – do not sow dry	Do not sow – high yield loss for late sowing

Cunderdin

Rainfall to date: 134.6 mm. Days with significant stubble moisture: 38

15 June	22 June	29 June
27% spore released - blackspot risk high	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

Dalwallinu

Rainfall to date: 136.6 mm. Days with significant stubble moisture: 46

15 June	22 June	29 June
46% spore released - blackspot risk medium	59% spore released - blackspot risk medium	74% spore released - blackspot risk low
Sow – do not sow dry	Do not sow – high yield loss for late sowing	Do not sow – high yield loss for late sowing

Dowerin

Rainfall to date: 173.9 mm. Days with significant stubble moisture: 49

15 June	22 June	29 June
53% 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

Gairdner

Rainfall to date: 96.7 mm. Days with significant stubble moisture: 66

15 June	22 June	29 June
85% spore released - blackspot risk low	91% spore released - blackspot risk low	96% 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: 110.4 mm. Days with significant stubble moisture: 71

15 June	22 June	29 June
Blackspot risk low	Blackspot risk low	Blackspot risk low
Sow – do not sow dry	Sow – do not sow dry	Sow – do not sow dry

Hillman

Rainfall to date: 128.9 mm. Days with significant stubble moisture: 51

15 June	22 June	29 June
57% spore released - blackspot risk medium	70% spore released - blackspot risk low	82% spore released - blackspot risk low
Sow – do not sow dry	Sow – do not sow dry	Sow – do not sow dry

Jacup

Rainfall to date: 146.7 mm. Days with significant stubble moisture: 68

15 June	22 June	29 June
87% 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

Katanning

Rainfall to date: 147 mm. Days with significant stubble moisture: 49

15 June	22 June	29 June
53% 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	Do not sow – high yield loss for late sowing

Kojonup

Rainfall to date: 140.2 mm. Days with significant stubble moisture: 57

15 June	22 June	29 June
70% spore released - blackspot risk low	80% spore released - blackspot risk low	89% spore released - blackspot risk low
Sow – do not sow dry	Sow – do not sow dry	Sow – do not sow dry

Kondinin

Rainfall to date: 114.9 mm. Days with significant stubble moisture: 65

15 June	22 June	29 June
83% spore released - blackspot risk low	90% spore released - blackspot risk low	96% spore released - blackspot risk low
Sow – do not sow dry	Sow – do not sow dry	Sow – do not sow dry

Kulin

Rainfall to date: 137.9 mm. Days with significant stubble moisture: 65

15 June	22 June	29 June
83% spore released - blackspot risk low	90% spore released - blackspot risk low	96% 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: 115 mm. Days with significant stubble moisture: 63

15 June	22 June	29 June
80% spore released - blackspot risk low	88% 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

Merredin

Rainfall to date: 129.5 mm. Days with significant stubble moisture: 50

15 June	22 June	29 June
55% 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

Mingenew

Rainfall to date: 147.3 mm. Days with significant stubble moisture: 39

15 June	22 June	29 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

Moora

Rainfall to date: 116.9 mm. Days with significant stubble moisture: 54

15 June	22 June	29 June
64% 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

Mount Howick

Rainfall to date: 162.5 mm. Days with significant stubble moisture: 98

15 June	22 June	29 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

Mt Barker

Rainfall to date: 193.4 mm. Days with significant stubble moisture: 102

15 June	22 June	29 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: 123.8 mm. Days with significant stubble moisture: 45

15 June	22 June	29 June
43% spore released - blackspot risk medium	57% spore released - blackspot risk medium	72% spore released - blackspot risk low
Sow – do not sow dry	Don’t sow – High yield loss for late sowing	Don’t sow – High yield loss for late sowing

Narrogin

Rainfall to date: 131.5 mm. Days with significant stubble moisture: 57

15 June	22 June	29 June
70% spore released - blackspot risk low	80% spore released - blackspot risk low	89% spore released - blackspot risk low
Sow – do not sow dry	Sow – do not sow dry	Sow – do not sow dry

Newdegate

Rainfall to date: 107.4 mm. Days with significant stubble moisture: 58

15 June	22 June	29 June
72% spore released - blackspot risk low	83% spore released - blackspot risk low	91% spore released - blackspot risk low
Sow – do not sow dry	Sow – do not sow dry	Sow – do not sow dry

Northam

Rainfall to date: 107.2 mm. Days with significant stubble moisture: 51

15 June	22 June	29 June
57% spore released - blackspot risk medium	70% spore released - blackspot risk low	82% spore released - blackspot risk low
Sow – do not sow dry	Sow – do not sow dry	Sow – do not sow dry

Pingrup

Rainfall to date: 102.1 mm. Days with significant stubble moisture: 62

15 June	22 June	29 June
79% 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

Salmon Gums

Rainfall to date: 131 mm. Days with significant stubble moisture: 69

15 June	22 June	29 June
88% spore released - blackspot risk low	94% 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 West

Rainfall to date: 133.1 mm. Days with significant stubble moisture: 70

15 June	22 June	29 June
89% spore released - blackspot risk low	95% spore released - blackspot risk low	98% spore released - blackspot risk low
Sow – do not sow dry	Sow – do not sow dry	Sow – do not sow dry

Tammin

Rainfall to date: 115.5 mm. Days with significant stubble moisture: 43

15 June	22 June	29 June
38% 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

Toodyay

Rainfall to date: 112.9 mm. Days with significant stubble moisture: 55

15 June	22 June	29 June
66% 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

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