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 spores 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 2018 to 18 June 2018 from the nearest weather station.
Key to blackspot severity scores
Blackspot risk | Five out of 10 years | Three out of 10 years | One out of 10 years |
---|---|---|---|
Low | 2 | 5 | 15 |
Medium | 20 | 25 | 35 |
High | 25 | 30 | 50 |
Bencubbin
Last date used for prediction: 17 June 2018. Rainfall to date: 99.6mm
Days with significant stubble moisture: 37
17 June | 24 June | 1 July |
---|---|---|
25% spore released - blackspot risk high | 34% spore released - blackspot risk medium | 50% spore released - blackspot risk medium |
Do not sow – high yield loss for late sowing | Do not sow – high yield loss for late sowing | Do not sow – high yield loss for late sowing |
Boyup Brook
Last date used for prediction: 17 June 2018. Rainfall to date: 187.6mm
Days with significant stubble moisture: 51
17 June | 24 June | 1 July |
---|---|---|
57% 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
Last date used for prediction: 17 June 2018. Rainfall to date: 101.4mm
Days with significant stubble moisture: 44
17 June | 24 June | 1 July |
---|---|---|
41% spore released - blackspot risk medium | 50% spore released - blackspot risk medium | 66% spore released - blackspot risk low |
Do not sow – high yield loss for late sowing | Do not sow – high yield loss for late sowing | Do not sow – high yield loss for late sowing |
Dowerin
Last date used for prediction: 17 June 2018. Rainfall to date: 96.9mm
Days with significant stubble moisture: 36
17 June | 24 June | 1 July |
---|---|---|
23% spore released - blackspot risk high | 31% spore released - blackspot risk medium | 48% spore released - blackspot risk medium |
Do not sow – high yield loss for late sowing | Do not sow – high yield loss for late sowing | Do not sow – high yield loss for late sowing |
Gairdner
Last date used for prediction: 17 June 2018. Rainfall to date: 74.7mm
Days with significant stubble moisture: 53
17 June | 24 June | 1 July |
---|---|---|
62% spore released - blackspot risk low | 75% spore released - blackspot risk low | 86% 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 |
Jacup
Last date used for prediction: 17 June 2018. Rainfall to date: 100.2mm
Days with significant stubble moisture: 62
17 June | 24 June | 1 July |
---|---|---|
79% spore released - blackspot risk low | 85% spore released - blackspot risk low | 92% 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 |
Katanning
Last date used for prediction: 16 June 2018. Rainfall to date: 137.6mm
Days with significant stubble moisture: 53
16 June | 23 June | 30 June |
---|---|---|
62% spore released - blackspot risk low | 68% spore released - blackspot risk low | 80% 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 |
Kojonup
Last date used for prediction: 17 June 2018. Rainfall to date: 176.7mm
Days with significant stubble moisture: 61
17 June | 24 June | 1 July |
---|---|---|
77% spore released - blackspot risk low | 83% spore released - blackspot risk low | 91% 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 |
Kondinin
Last date used for prediction: 17 June 2018. Rainfall to date: 118.2mm
Days with significant stubble moisture: 53
17 June | 24 June | 1 July |
---|---|---|
62% spore released - blackspot risk low | 70% spore released - blackspot risk low | 82% spore released - blackspot risk low |
Do not sow – high yield loss for late sowing | Do not sow – high yield loss for late sowing | Do not sow – high yield loss for late sowing |
Lake King
Last date used for prediction: 17 June 2018. Rainfall to date: 100.3mm
Days with significant stubble moisture: 62
17 June | 24 June | 1 July |
---|---|---|
79% spore released - blackspot risk low | 85% spore released - blackspot risk low | 92% spore released - blackspot risk low |
Do not sow – high yield loss for late sowing | Do not sow – high yield loss for late sowing | Do not sow – high yield loss for late sowing |
Merredin
Last date used for prediction: 17 June 2018. Rainfall to date: 91.9mm
Days with significant stubble moisture: 39
17 June | 24 June | 1 July |
---|---|---|
29% spore released - blackspot risk high | 38% spore released - blackspot risk medium | 55% spore released - blackspot risk medium |
Do not sow – high yield loss for late sowing | Do not sow – high yield loss for late sowing | Do not sow – high yield loss for late sowing |
Mingenew
Last date used for prediction: 17 June 2018. Rainfall to date: 147.9mm
Days with significant stubble moisture: 37
17 June | 24 June | 1 July |
---|---|---|
25% spore released - blackspot risk high | 34% spore released - blackspot risk medium | 50% spore released - blackspot risk medium |
Do not sow – high yield loss for late sowing | Do not sow – high yield loss for late sowing | Do not sow – high yield loss for late sowing |
Moora
Last date used for prediction: 17 June 2018. Rainfall to date: 145.9mm
Days with significant stubble moisture: 42
17 June | 24 June | 1 July |
---|---|---|
36% spore released - blackspot risk medium | 46% spore released - blackspot risk medium | 62% spore released - blackspot risk low |
Do not sow – high yield loss for late sowing | Do not sow – high yield loss for late sowing | Do not sow – high yield loss for late sowing |
Mount Howick
Last date used for prediction: 16 June 2018. Rainfall to date: 162mm
Days with significant stubble moisture: 78
16 June | 23 June | 30 June |
---|---|---|
96% spore released - blackspot risk low | 98% spore released - blackspot risk low | 100% 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 |
Mt Barker
Last date used for prediction: 17 June 2018. Rainfall to date: 131.2mm
Days with significant stubble moisture: 75
17 June | 24 June | 1 July |
---|---|---|
94% spore released - blackspot risk low | 97% spore released - blackspot risk low | 99% spore released - blackspot risk low |
Sow – do not sow dry | Sow – do not sow dry | Sow – do not sow dry |
Mullewa
Last date used for prediction: 17 June 2018. Rainfall to date: 132.9mm
Days with significant stubble moisture: 39
17 June | 24 June | 1 July |
---|---|---|
29% spore released - blackspot risk high | 38% spore released - blackspot risk medium | 55% spore released - blackspot risk medium |
Do not sow – high yield loss for late sowing | Do not sow – high yield loss for late sowing | Do not sow – high yield loss for late sowing |
Newdegate
Last date used for prediction: 17 June 2018. Rainfall to date: 74mm
Days with significant stubble moisture: 56
17 June | 24 June | 1 July |
---|---|---|
68% spore released - blackspot risk low | 75% spore released - blackspot risk low | 86% spore released - blackspot risk low |
Do not sow – high yield loss for late sowing | Do not sow – high yield loss for late sowing | Do not sow – high yield loss for late sowing |
Northam
Last date used for prediction: 17 June 2018. Rainfall to date: 153.2mm
Days with significant stubble moisture: 38
17 June | 24 June | 1 July |
---|---|---|
27% spore released - blackspot risk high | 36% spore released - blackspot risk medium | 53% spore released - blackspot risk medium |
Do not sow | Do not sow – high yield loss for late sowing | Do not sow – high yield loss for late sowing |
Pingrup
Last date used for prediction: 17 June 2018. Rainfall to date: 78.7mm
Days with significant stubble moisture: 49
17 June | 24 June | 1 July |
---|---|---|
53% spore released - blackspot risk medium | 62% spore released - blackspot risk low | 75% spore released - blackspot risk low |
Do not sow – high yield loss for late sowing | Do not sow – high yield loss for late sowing | Do not sow – high yield loss for late sowing |
Salmon Gums
Last date used for prediction: 16 June 2018. Rainfall to date: 178mm
Days with significant stubble moisture: 65
16 June | 23 June | 30 June |
---|---|---|
83% spore released - blackspot risk low | 87% spore released - blackspot risk low | 94% spore released - blackspot risk low |
Do not sow – high yield loss for late sowing | Do not sow – high yield loss for late sowing | Do not sow – high yield loss for late sowing |
Scaddan
Last date used for prediction: 16 June 2018. Rainfall to date: 244.4mm
Days with significant stubble moisture: 62
16 June | 23 June | 30 June |
---|---|---|
79% spore released - blackspot risk low | 88% spore released - blackspot risk low | 94% spore released - blackspot risk low |
Do not sow – high yield loss for late sowing | Do not sow – high yield loss for late sowing | Do not sow – high yield loss for late sowing |
Tammin
Last date used for prediction: 17 June 2018. Rainfall to date: 89.4mm
Days with significant stubble moisture: 43
17 June | 24 June | 1 July |
---|---|---|
38% spore released - blackspot risk medium | 48% spore released - blackspot risk medium | 64% spore released - blackspot risk low |
Do not sow – high yield loss for late sowing | Do not sow – high yield loss for late sowing | Do not sow – high yield loss for late sowing |
Toodyay
Last date used for prediction: 17 June 2018. Rainfall to date: 196.7mm
Days with significant stubble moisture: 45
17 June | 24 June | 1 July |
---|---|---|
43% spore released - blackspot risk medium | 53% spore released - blackspot risk medium | 68% spore released - blackspot risk low |
Sow - do not sow | Do not sow – high yield loss for late sowing | Do not sow – high yield loss for late sowing |