Topic: southern region

Latest on crop disease – 2017 GRDC mid-year update papers

Keep up with the latest research information on crop diseases including blackleg, sclerotinia, wheat rusts and septoria.  The following papers were presented at the GRDC Updates across Australia in July and August 2017. Click the paper titles to view the full papers.
Spray boom technology – improving coverage and managing drift
Author: […]

Blackleg Management Guide

Blackleg lesions on canola leaf

Figure 1. Blackleg leaf lesion on canola
Blackleg is a fungal disease of canola that can cause severe yield loss. It is more severe in areas of intensive canola production as fungal spores are released from the previous year’s canola stubble and spread by wind and rain splash. With good management yield loss […]

Protect wheat from Septoria tritici this spring

Septoria tritici with black fruiting bodies pycinidia. Source: Grant Hollaway (Agriculture Victoria)

Septoria tritici blotch is present in wheat crops in the Victoria Wimmera and across the medium and high rainfalls regions of SA. Agronomists and growers are encouraged to monitor their wheat for symptoms, with a view to fungicide control if necessary.
This disease was common at low levels in the Wimmera […]

Proactively manage barley diseases in 2017 – interview with Mark McLean

Agronomists at field day with mark mclean discussing barley diseases.

After a bumper season in 2017 Victorian growers are reminded to be proactive in monitoring and management of barley diseases. Mark McLean, Barley Pathologist with Agriculture Victoria spoke to us at the Bendigo GRDC Updates and gives growers a heads up of what diseases are likely to pop up in […]

Lupin growers to keep an eye out for Lupin anthracnose

In the eastern Riverina region of NSW in October 2016 lupin anthracnose was detected for the first time in commercial crops. The disease is present in WA and SA but still remains a notifiable exotic disease in NSW and Victoria. Natural hosts of lupin anthracnose are not established in NSW […]

Spot the difference – identifying fungal diseases on canola

This article describes the different symptoms of canola fungal diseases blackleg, white leaf spot, downy mildew and alternaria leaf spot.
Blackleg
Blackleg, caused by the fungus Leptosphaeria maculans, is the most serious disease of canola in Australia. Blackleg lesions are grey, circular spots with black fruiting bodies (pycnidia) forming in the centre (Figures […]

Preliminary PREDICTA® B results show prevalence of Ascochyta inoculum

Figure 1 Ascochyta blight (Phoma rabiei) population density in PREDICTA® B and NVT sites in 2017

Growers are now able to utilise the PREDICTA® B DNA-based soil test to detect the presence of Ascochyta blight inoculum (Phoma rabiei) in their paddocks. Initial testing has shown that the Ascochyta fungus was detected in 35 per cent of samples from the Northern Region. This finding is a concern […]

Chocolate Spot in Vetch – Northern Victorian Mallee

Figure 2. Botrytis spp. causing Chocolate spot in vetch.

Chocolate spot has been found in some early sown vetch crops in the Northern Victorian Mallee. This disease develops in warm and humid canopies. Given suitable conditions this can be a damaging disease that may warrant control with fungicides, although growers should consider the economics of applying fungicides to vetch. […]

White leaf spot of canola

Figure 1. Early symptoms of white leaf spot on canola leaf.

During 2017 there is an increased incidence of canola white leaf spot in many regions of southern Australia. The disease is distributed worldwide, but in Australia, it is not usually severe enough to cause yield loss. However, if environmental conditions are favourable, it can result in significant defoliation causing reduced […]

Monitor blackleg severity to ensure return on fungicide application

During 2015 and 2016 the blackleg fungus overcame the blackleg resistance of some Group A cultivars. These cultivars dropped from Moderately Resistant (MR) to Moderately Susceptible (MS) and all updated ratings are available in the 2017 Autumn Blackleg Management guide. In the lead up to the 2017 season, fungicide application […]