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

Page last updated: Thursday, 3 May 2018 - 10:57am

Please note: This content may be out of date and is currently under review.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 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.

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