Spring and Winter Canola: Turnip Mosaic Virus

Excerpt from Agronomy Guide for Field Crops (Chapter 8)

Order OMAFRA Publication 811: Agronomy Guide for Field Crops

Table of Contents

1. Incidence
2. Disease Cycle and Appearances
3. Management Strategies
4. Updates on Spring and Winter Canola: Turnip Mosaic Virus

Incidence

Turnip mosaic virus (TuMV) has become a significant problem in some areas where winter canola is grown.

Disease Cycle and Appearance

Infestation takes place in the fall and causes leaf mottling (yellow or light green areas surrounded by normal green colour) and wrinkling or puckering of the leaf tissue between the veins.

Plate 146. Turnip mosaic virus (TMV) causes leaf mottling and wrinkling or puckering of leaves. Can cause yellowing and stunting.

Spring growth is slow. Severely infected plants are stunted, twisted and generally light green or yellow. Pods are distorted and a significant proportion of the seeds are poorly filled. The disease appears to be more severe in areas where other cruciferous crops (such as rutabagas) are grown and in fields where pressure from weeds and volunteer cereals is high.

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Management Strategies

Volunteer crops of winter canola often have high levels of TuMV infections. Early planting may be helpful in increasing the winter survival of the crop in some areas but appears to also increase the severity of TuMV where the disease is present. Only minor levels of TuMV infection have been observed in spring canola.

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Updates on Spring and Winter Canola: Turnip Mosaic Virus

No updates available at this time.

Related Links

• Canola
• Diseases
• Field Crop Protection Guide - Publication 812

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