Canola and Mustard: Cabbage Seedpod Weevil (Ceutorhynchus obstrictus)

Excerpt from Chapter 6, Field Crop Protection Guide, Order this publication

Table of Contents

1. Integrated Pest Management Options
• cyhalothrin-lambda – Matador 120 EC and Silencer 120 EC
2. Related links...

Integrated Pest Management Options

Serious pest in winter canola, though can also impact early-planted spring canola. Adult weevils lay eggs directly into the seedpod. Pod feeding by the larvae can cause up to 35% yield loss. Apply insecticides to adults prior to egg-laying, as foliar insecticide will not control larvae within the canola pod.

See OMAFRA Publication 811, Agronomy Guide for Field Crops, for further information on pest biology and management options.

Canola is a valuable honey source and is utilized by honeybees. Bees also pollinate the crop. If spraying an insecticide, ensure there are no honey-producing hives in your area.

Comments
For adult control only. Ground and aerial application. Apply at bud to early-flowering stage. Maximum 1 application per year. Tank-mixing with clay-based fungicides (e.g., Lance or Ronalin) is not recommended, as these fungicides may affect insecticide efficacy. Do not apply within 7 days of harvest.

Related links...

• Insects
• Canola and Mustard