Diseases in Canola

Broad disease constraint resources are outlined in the Agronomists Toolkit. Specific disease categories are listed below:

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Turnip mosaic virus

Constraint - Turnip Mosaic Virus

Turnip mosaic virus (TuMV) is one of three viruses that infect Australian canola. Cauliflower mosaic virus (CaMV) and Beet Western Yellows Virus (BWYV) are the others.

Symptoms

  • Varieties vary in susceptibility, however most current canola varieties are resistant

  • Leaves develop pale/yellow/green mottles and may have dead spots and line patterns

  • Severely affected plants are stunted, twisted and generally light green to yellow, with fewer pods and seeds

Damage

  • The virus is uncommon, but has the potential to cause significant yield loss if plants are infected early

Management

Many commercial varieties have infection resistance to this virus, however controlling broadleaf weeds (especially over summer), retaining stubble at sowing, manipulating sowing dates, sowing at high seeding rates, and sowing varieties with known infection resistance are all effective management strategies to reduce the impact of turnip mosaic virus.

 

Links and Resources

DAFWA - Diagnosing Turnip mosaic virus in canola

Diagnosis, what to look for in paddock and plant, what else it could be, where did it come from, and management strategies. Page last updated 2014.
DEPI VIC - Canola diseases. Turnip mosaic virus

The section on viruses contains information on introduction, symptoms, disease cycle, and management. Published 2008, page last updated 2009, reviewed 2010.
DEPI VIC - Identification and management of field crop diseases in Victoria. Turnip Mosaic Virus

Page 146 Table 11.1 gives a key for canola diseases at different stages of plant growth. Page 154 contains introduction, symptoms, disease cycle, and management. Published 2012.
DPI NSW - Virus diseases in Canola and Mustard.

6 page PDF. Introduction, distribution, virus species and their transmission, symptoms, incidence, spread, aphid identification, control measures, and current research. Published 2004.
GRDC - Best Practice Management Guide. Viruses.

Page 65. Introduction on all three viruses, symptoms, disease cycle, and management. Published 2009.