Tag archive: blackleg

Latest on Canola disease – 2018 GRDC Update Papers

Canola close up

Keep up with the latest research information on canola diseases including blackleg and sclerotinia. The following papers and key messages were presented at the GRDC Updates across Australia in February and March 2018. Southern region papers Western region papers Read the key messages below and click the paper titles to […]

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. Southern Update Papers Northern Update papers Wheat and […]

Blackleg Management Guide

Blackleg lesions on canola leaf

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 can be minimised. The blackleg management guide […]

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 […]

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 […]

Latest on Canola disease – 2017 GRDC Update Papers

Keep up with the latest research information on canola diseases including blackleg and sclerotinia. The following papers were presented at the GRDC Updates across Australia in February and March 2017. Click the paper titles to view the full papers. We’ve also pulled together all the: Cereal disease papers Pulse disease papers […]

Blackleg monitoring sites – 2016 results

Blackleg monitoring sites

Blackleg monitoring results for all 2016 canola producing regions are now available. In 2016 cultivars representing each of the resistance groups were sown at 37 trials across Australia and monitored for levels of blackleg disease. These data indicate which resistance groups have higher levels of disease compared to the other resistance […]

Early severe blackleg infection requires fungicide application

Steve Marcroft title page

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 […]

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 […]

Latest on Oilseed disease – 2016 Update papers

Keep up with the latest research information on oilseed diseases including sclerotinia and blackleg. Below are the take home messages from papers presented at the GRDC Updates in February and March 2016. Northern Region Southern Region Western Region Click the paper titles to view the full papers. Northern Region Weeds […]