Western Australia is the major canola growing state in Australia producing about 40% of the nation’s 2.7 million tonnes each year.

The majority of WA canola is exported – generating about $0.6 billion for the state’s economy each year, with the Netherlands, Belgium, Germany and Japan WA’s largest export canola markets.

WA canola is renowned for its high oil content – with the state consistently achieving higher oil contents than the rest of the nation.

The Department of Primary Industries and Regional Development supports the WA canola industry through agronomic research and development; and pest and disease identification and management.


  • Infection can spread from cotyledon of seedling leaf and pinch off the hypocotyl

    Blackleg is the most common and serious disease of canola in Western Australia. It is a sexually reproducing fungus that will overcome cultivar resistance genes.

  • Wrinkled leaves and characteristic ringspots

    An aphid borne viral disease in canola that has the potential to cause significant yield loss with early infection, but rarely occurs in WA.

  • Group I herbicide damage can also cause root nodules

    Clubroot is caused by a soil-borne fungus that only affects plants in the Cruciferae family including canola,mustard, wild radish, wild mustard, wild turnip and vegetable brassicas.

  • Rhizoctonia affected seedlings develop red-brown hypocotyl lesions as shown by the middle seedling

    Damping-off is seedling root and hypocotyl (seedling stem) disease that can be caused by a complex of Rhizoctonia, Fusarium and Pythium fungi.

  • Yellow areas on upper leaf surface

    A fungal disease infecting foliage of canola, it mainly affects seedlings and is rarely found beyond the rosette stage.

  • This report outlines the work undertaken by the Grains, Seeds and Hay Industry Funding Scheme for bedstraw eradication during the 2013/14 financial year.

  • Yellowing of leaf margins that progresses inwards generally between leaf veins with some mottles

    Manganese toxicity is rare in WA, but may occur on acidic heavy soils with high manganese levels.


  • Leaf necrosis moves from leaf edges to veins

    A range of group C herbicides are registered for use in triazine tolerant (TT) varieties, but other varieties are susceptible to both pre and post emergent applications.


  • Dull-coloured plants with dying older leaves and aborted flowers

    Spring drought refers to plant water stress from insufficient rainfall or stored soil moisture from bud formation to maturity.


  • Wheatbelt valley secondary salinity

    Salinity affects growth by reducing plant root ability to extract water from the soil, and chloride toxicity.

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