Tag archive: downy mildew

Spot the difference – identifying fungal diseases on canola

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 […]