Field pea blackspot management guide for southern New South Wales - 16 May 2018

Page last updated: Thursday, 17 May 2018 - 2:29pm

Please note: This content may be out of date and is currently under review.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 14 May 2018 from the nearest weather station.

Key to blackspot severity scores

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: 122.2mm. Days with significant stubble moisture: 50

Forecast for crops sown on	13 May	20 May	27 May
Blackspot severity	3-4	2	1
Sowing guide (based on agronomic suitability)	Too early to sow - before the 19 May	Marginally too early to sow - 20-26 May	Getting too late to sow - after 30 June
Blackspot risk	Medium	Low	Low

Griffith

Rainfall to date: 39mm. Days with significant stubble moisture: 31

Forecast for crops sown on	13 May	20 May	27 May
Blackspot severity	5	5	3-4
Sowing guide (based on agronomic suitability)	Getting too late to sow - after 9 June	Getting too late to sow - after 9 June	Getting too late to sow - after 9 June
Blackspot risk	High	High	Medium

Temora

Rainfall to date: 116.9mm. Days with significant stubble moisture: 49

Forecast for crops sown on	13 May	20 May	27 May
Blackspot severity	3-4	2	1
Sowing guide (based on agronomic suitability)	Marginally too early to sow - 13-19 May	Getting too late to sow - after 16 June	Getting too late to sow - after 16 June
Blackspot risk	Medium	Low	Low

Wagga Ag Institute

Rainfall to date: 139.8mm. Days with significant stubble moisture: 53

Forecast for crops sown on	13 May	20 May	27 May
Blackspot severity	2	2	1
Sowing guide (based on agronomic suitability)	Too early to sow - before the 19 May	Marginally too early to sow - 20-26 May	Getting too late to sow - after 30 June
Blackspot risk	Low	Low	Low

New South Wales Department of Primary Industries

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