Field Crop Diseases

Webinar: Powdery mildew in wheat and the implications for this season in WA

Powdery mildew wheat Ciara Beard DAFWA

Early detection of powdery mildew in wheat in the Bindi Bindi region and south of Kadoux prompted the DAFWA team to present a webinar on powdery mildew in wheat and the implications for the 2016 season.  This webinar was presented on July 6, 2016.

The key messages from the webinar were:

Powdery […]

Webinar: Sclerotinia in canola – what do we need to do?

This webinar was presented by Ravjit Khangura from DAFWA on July 11, 2016. The webinar covers early infection of canola crops with Sclerotinia and when to apply fungicides.
Key messages

Apothecia emergence is now widespread in Western Australia
Some crops have been infected pre-flowering
Disease epidemics are favoured by continuous wet and […]

Early severe blackleg infection requires fungicide application

Monitor crops for blackleg
Growers are usually encouraged to monitor for blackleg in the spring. However, in 2016 widespread, severe early blackleg leaf lesions have occurred across Australia’s canola growing regions.
The increased incidence of early disease is due to the following key factors:

continued leaf wetness driving the disease cycle;
the blackleg […]

Blackleg fungicide tolerance survey 2015

As canola becomes more common in the rotation and the intensity of production increases so does growers reliance on fungicides to combat blackleg infection. In 2015, researchers surveyed commercial paddocks for the presence of fungicide tolerance in blackleg populations. Steve Marcroft discusses the survey, its findings and the implications for […]

Understanding the cause of blackleg stem and branch cankers

In recent years, blackleg infection has affected the upper stems and branches of canola plants leading to yield loss as branches and pods on affected plants senesce prematurely causing yield loss. Steve Marcroft explains the factors researchers now believe are causing cankers on stems and branches of canola crops.
Further information
For […]

Stop the Spot continues the fight

Yellow spot causes tan – coloured lesions on the leaves that are surrounded by yellow halos.
Growers and advisers are being encouraged to send in samples of leaves with yellow spot and join researchers in the fight against yellow spot.
Results from the second year of the Stop the Spot campaign have […]