This usually occurs where vegetable beetle populations have been high due to large amounts of organic matter carried over from a pasture phase and many larvae appear in the following season with the crop. It is difficult to predict whether they will be a problem in canola crops but there are a number of options for control. This will allow for some plant losses to the larvae, if present, without being detrimental to the crop's yield. Most of the pests likely to be encountered in canola crops are listed in Table 1 under the crop stages at which serious damage may occur. The descriptions will help you identify the cause of damage and take appropriate action.
Adults are dull grey with a typical weevil snout.
The larvae are slug-like, pale yellow to green with a dark head. Both adults and larvae chew leaves and can kill young plants Adults hide under surface debris during the day. Larvae can be found in growing points, leaf axils and under leaves. L 400 mL Adults are difficult to kill. Small bugs with or without wings.