Field pea blackspot management guide for NSW - 15 April

Page last updated: Friday, 26 April 2019 - 10:25am

Please note: This content may be out of date and is currently under review.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 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 2019 to 14 April 2019 from the nearest weather station.

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

Cootamundra

Rainfall to date: 168.1mm Days with significant stubble moisture: 54

Forecast for crops sown on	14 Apr	21 Apr	28 Apr
Blackspot severity	2	2	1
Sowing guide (based on agronomic suitability)	Too early to sow - before the 19th May	Too early to sow - before the 19th May	Too early to sow - before the 19th May
Blackspot risk	Low	Low	Low

Griffith

Rainfall to date: 60.2mm Days with significant stubble moisture: 33

Forecast for crops sown on	14 Apr	21 Apr	28 Apr
Blackspot severity	5	5	3 to 4
Sowing guide (based on agronomic suitability)	Too early to sow - before the 5th May	Too early to sow - before the 5th May	Too early to sow - before the 5th May
Blackspot risk	High	High	Medium

Temora

Rainfall to date: 161.9mm Days with significant stubble moisture: 44

Forecast for crops sown on	14 Apr	21 Apr	28 Apr
Blackspot severity	3 to 4	3 to 4	2
Sowing guide (based on agronomic suitability)	Too early to sow - before the 12th May	Too early to sow - before the 12th May	Too early to sow - before the 12th May
Blackspot risk	Medium	Medium	Low

Wagga Ag Institute

Rainfall to date: 80.3mm Days with significant stubble moisture: 53

Forecast for crops sown on	14 Apr	21 Apr	28 Apr
Blackspot severity	2	2	1
Sowing guide (based on agronomic suitability)	Too early to sow - before the 19th May	Too early to sow - before the 19th May	Too early to sow - before the 19th May
Blackspot risk	Low	Low	Low

For more information contact Dr Kurt Lindbeck at NSW DPI on ph +61 (0)2 6938 1608.

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