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 […]
Tag archive: white leaf spot
This article describes the different symptoms of blackleg, white leaf spot, downy mildew and alternaria leaf spot on canola.
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 […]