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Field Pea Blackspot Management Guide for South Australia - 2014 Page 1 of 6
Department of Agriculture and Food
Field Pea Blackspot Management Guide for South Australia - 2014 Unpublished
Field Pea Blackspot Management Guide is a location & season specific weekly forecast. It accounts for varietal resistance, chemical control options, agronomic yield potentials, agronomic constraints (frost & terminal drought), risks of spore showers, and disease related yield loss. Based on this information the Blackspot Management Guide suggests a window of suitable sowing dates.
Blackspot management practices to avoid potential yield loss: Field pea should be sown at least 500 m from last year's field pea stubble
Field pea should not be sown in paddocks where peas were grown in the last 3 years
Field peas should be sown after the majority of blackspot spores have been released from stubble
Summer and autumn conditions determine when blackspot spores are released. Field pea crops should be sown so that the majority of blackspot spores (~60%) have been released prior to the crop emergence. This level of spores exposure results in a disease severity of 2 or less. This prediction is based on DAFWA's "Blackspot Manager" model using weather data from the nearest weather station.
Rainfall from January to April 9, 2014 from the nearest weather station has been used. Where rainfall in individual paddocks has been less than weather station rainfall, the probability of severe blackspot may be higher. Projections into the future are based on the assumption of at least one rainfall event in excess of 3.5 mm each week.
Refer to the key below for a description of blackspot severity scores.
https://www.agric.wa.gov.au/print/node/2933 16/04/2014
Field Pea Blackspot Management Guide for South Australia - 2014 Page 2 of 6
Balaklava Rainfall to date:100 mm; Days with significant stubble moisture:32
Weekly Forecast
Blackspot severity
Sowing guide (based on agronomic suitability)
Blackspot risk
Blyth
4 May
3-4
Marginally early to sow
Medium
11 May
2
Sow
Low
18 May
1
Sow
Nil
Rainfall to date:167 mm; Days with significant stubble moisture:41
Weekly Forecast
Blackspot severity
Sowing guide (based on agronomic suitability)
Blackspot risk
Bordertown Rainfall to date:33 mm; Days with significant stubble moisture:27
4 May
2
Sow
Low
11 May
2
Sow
Low
18 May
2
Sow
Low
Weekly Forecast
Blackspot severity
Sowing guide (based on agronomic suitability)
Blackspot risk
4 May
3-4
Too early to sow
Medium
11 May
2
Too early to sow
Low
18 May
1
Too early to sow
Nil
https://www.agric.wa.gov.au/print/node/2933 16/04/2014
Field Pea Blackspot Management Guide for South Australia - 2014 Page 3 of 6
Crystal Brook Rainfall to date:131 mm; Days with significant stubble moisture:35
Weekly Forecast
Blackspot severity
Sowing guide (based on agronomic suitability)
Blackspot risk
Kingsford Rainfall to date:140 mm; Days with significant stubble moisture:46
4 May
2
Sow
Low
11 May
2
Sow
Low
18 May
1
Sow
Nil
Weekly Forecast
Blackspot severity
Sowing guide (based on agronomic suitability)
Blackspot risk
Lameroo
4 May
1
Too early to sow
Nil
11 May
1
Marginally early to sow
Nil
18 May
1
Marginally early to sow
Nil
Rainfall to date:81 mm; Days with significant stubble moisture:33
Weekly Forecast
Blackspot severity
Sowing guide (based on agronomic suitability
Blackspot risk
4 May
3-4
Marginally early to sow
Medium
11 May
2
Marginally early to sow
Low
18 May
1
Marginally early to sow
Nil
https://www.agric.wa.gov.au/print/node/2933 16/04/2014
Field Pea Blackspot Management Guide for South Australia - 2014 Page 4 of 6
Maitland Rainfall to date:116 mm; Days with significant stubble moisture:29
Weekly Forecast
Blackspot severity
Sowing guide (based on agronomic suitability)
Blackspot risk
Minnipa
4 May
3-4
Too early to sow
Medium
11 May
2
Too early to sow
Low
18 May
2
Marginally early to sow
Nil
Rainfall to date:109 mm; Days with significant stubble moisture:42
Weekly Forecast
Blackspot severity
Sowing guide (based on agronomic suitability)
Blackspot risk
Riverton Rainfall to date:118 mm; Days with significant stubble moisture:24
4 May
2
Sow
Low
11 May
1
Sow
Nil
18 May
1
Sow
Nil
Weekly Forecast
Blackspot severity
Sowing guide (based on agronomic suitability)
Blackspot risk
4 May
3-4
Too early to sow
Medium
11 May
3-4
Too early to sow
Medium
18 May
2
Too early to sow
Low
https://www.agric.wa.gov.au/print/node/2933 16/04/2014
Field Pea Blackspot Management Guide for South Australia - 2014 Page 5 of 6
Yeelanna Rainfall to date:88 mm; Days with significant stubble moisture:30
Weekly Forecast
Blackspot severity
Sowing guide (based on agronomic suitability)
Blackspot risk
Key to blackspot severity scores
4 May
2
Too early to sow
Low
11 May
2
Too early to sow
Low
18 May
1
Too early to sow
Nil
Percentage Yield Loss in Blackspot severity
1
2
3-4
5
5 out of10 yrs
0
2
20
25
3 out of 10 yrs
0
5
25
30
1out of 10 yrs
0
15
35
50
Contact information Dr. Jenny Davidson - (08) 8303 9389; E-mail: [email protected] [1]
Dr. Moin Salam - (08) 9368 3261; E-mail: [email protected] [2]
All Page Links [1] mailto:[email protected] [2] mailto:[email protected]
Source URL: https://www.agric.wa.gov.au/field-pea-blackspot-management-guide- south-australia-2014 This print version was generated at 12:09pm on the 16th of April, 2014. The original document was last revised at Wed, 16/04/2014 - 12:08pm
Copyright © Western Australian Agriculture Authority, 2013
https://www.agric.wa.gov.au/print/node/2933 16/04/2014
Field Pea Blackspot Management Guide for South Australia - 2014 Page 6 of 6
3 Baron-Hay Court South Perth WA 6151 Tel: (08) 9368 3333 Email: [email protected] Website: agric.wa.gov.au
Important disclaimer The Chief Executive Officer of the Department of Agriculture and Food and the State of Western Australia accept no liability whatsoever by reason of negligence or otherwise arising from the use or release of this information or any part of it.
https://www.agric.wa.gov.au/print/node/2933 16/04/2014
