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Cereals: European Chafer (Rhizotrogus majalis)

Author: OMAFRA Staff
Creation Date: 04 July 2005
Last Reviewed: 15 June 2009
Pub 812: Field Crop Protection Guide > Chapter 4: Cereals > European Chafer (White Grub)

Excerpt from Chapter 4, Field Crop Protection Guide, Order this publication

Table of Contents

  1. Description
  2. Integrated Pest Management Option
  3. Related links...

Description

European chafer larvae are white and C-shaped with an orange-brown head and dark posterior. This pest can be distinguished from other white grubs by its Y-shaped pattern of anal bristles known as "rasters," located on the underside of the last abdominal segment of the larva. The adult is a medium-sized, light-brown, fawn-coloured, oval scarab beetle, closely resembling the native June beetle.

Image 1. European chafer larvae are white with an orange-brown head and dark posterior. They are distinguished from other white grubs by the Y-pattern of the anal bristles (rasters).
Image 1. European chafer larvae are white with an orange-brown head and dark posterior. They are distinguished from other white grubs by the Y-pattern of the anal bristles (rasters).

 

Integrated Pest Management Options

Seed Treatment

High-risk areas are sandy knolls and areas bordering turf, pasture and tree lines. Chafer grubs can follow soybean crops on sandy soils. Avoid planting winter wheat if chafer grubs are easily found. See OMAFRA Publication 811, Agronomy Guide for Field Crops, for more details.

thiamethoxam – Cruiser 5 FS

Active ingredient thiamethoxam
Trade name Cruiser 5 FS
Rate (product) 50 mL per 100 kg seed

Comments(Days to harvest, label precautions, etc.)
For wheat and barley. For use in commercial seed treaters only. Do not graze or feed livestock on treated areas for 45 days after planting.

Related links...

 

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