Publication Date

9-2024

Series Number

DPIRD-60

Publisher

Department of Primary Industries and Regional Development

City

Perth

Abstract

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 is referred to as Upper Canopy Infection or UCI).

Diagnosis of blackleg in canola is available via our DDLS Plant pathology services, which is a chargeable service.

Number of Pages

10

Keywords

Blackleg, Canola, Crop disease, Fungus Leptosphaeria maculans, Western Australia, Crop damage

Disciplines

Agribusiness | Agricultural Economics | Agricultural Education | Agricultural Science | Agronomy and Crop Sciences | Biosecurity | Fungi | Plant Pathology

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