Field pea blackspot management guide for southern New South Wales - 2 May 2018

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 30 April 2018 from the nearest weather station.

Key to blackspot severity scores

Table 1 Percentage yield loss (in years) for different levels of blackspot risk scenarios
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

Cootamundra

Rainfall to date: 99.1mm Days with significant stubble moisture: 41

Forecast for crops sown on 30 Apr 7 May 14 May
Blackspot severity 3-4 3-4 2
Sowing guide (based on agronomic suitability) Too early to sow - before 19 May Too early to sow - before 19 May Too early to sow - before 19 May
Blackspot risk Medium Medium Low

Griffith

Rainfall to date: 22.8mm. Days with significant stubble moisture: 21

Forecast for crops sown on 30 Apr 7 May 14 May
Blackspot severity 5 5 5
Sowing guide (based on agronomic suitability) Too early to sow - before 5 May Marginally too early to sow - 7-12 May Marginally too early to sow - 7-12 May
Blackspot risk High High High

Temora

Rainfall to date: 97.2mm. Days with significant stubble moisture: 46

Forecast for crops sown on 30 Apr 7 May 14 May
Blackspot severity 3-4 3-4 2
Sowing guide (based on agronomic suitability) Too early to sow - before 12 May Too early to sow - before 12 May Too early to sow - before 12 May
Blackspot risk Medium Medium Low

Wagga Ag Institute

Rainfall to date: 119.1mm. Days with significant stubble moisture: 43

Forecast for crops sown on 30 Apr 7 May 14 May
Blackspot severity 3-4 3-4 2
Sowing guide (based on agronomic suitability) Too early to sow - before 19 May Too early to sow - before 19 May Too early to sow - before 19 May
Blackspot risk Medium Medium Low

More information

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

New South Wales Department of Primary Industries

Contact information

Jean Galloway
+61 (0)8 9690 2172
Page last updated: Thursday, 3 May 2018 - 10:57am

Field pea blackspot management guide for southern New South Wales - 2 May 2018

Author

Kawsar Salam

Funding bodies