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Blackleg And Its Management In Canola, Department Of Primary Industries And Regional Development, Western Australia

Grains and other field crops factsheets

Blackleg, caused by the fungus Leptosphaeria maculans, is the most common and serious disease of canola in Western Australia (WA). Blackleg can cause significant damage by infecting the cotyledons or first leaves early in the season, leading ultimately to crown lesions or cankers later in the season.

Changes in variety choice, crop rotation, earlier sowing times, and stubble retention have extended the risk of blackleg disease. Because of early emergence, later stages of crop growth are more likely to be exposed and infection can occur on all parts of the plant above ground, including canola flowers, stems, and branches (this …

Sclerotinia Stem Rot And Its Management In Canola, Department Of Primary Industries And Regional Development, Western Australia

Grains and other field crops factsheets

Sclerotinia stem rot, caused by the fungus Sclerotinia sclerotiorum, is a disease of canola that can cause significant yield losses exceeding 20% under conducive conditions. This disease occurs in all areas of the WA grainbelt.

Sclerotinia stem rot is one of the most variable and unpredictable diseases of canola, with incidence of infection varying greatly between paddocks and between years. Yield losses can be severe in years of higher moisture, cool conditions, and high humidity, which favour disease development.

This factsheet details the symptoms, disease risk and spread, yield and quality losses, and integrated disease management tactics for sclerotinia stem …

Bulletin 4406a - Fungal Diseases Of Canola In Western Australia, Martin Barbetti, Ravjit Khangura

Bulletins 4000 -

GRDC - Grains Research & Development Corporation.

There has been dramatic growth in the canola industry in Western Australia, from 35,000 hectares in 1993 to 920,000 hectares in 1999. Along with this expansion in the area sown the incidence and severity of various fungal diseases have also increased, especially blackleg. This Bulletin describes the most important and most prevalent fungal diseases of canola in Western Australia.