If there is no capeweed there is no reason for vegetable weevils to go into the paddock. Following these practices will reduce the weevil problem to that of adults moving into the canola crop and feeding on the crop edges. A boundary spray around paddocks bordered by heavy timber or bush may prevent adult weevils moving into the paddock. Inspect paddock boundaries regularly until the crop has four to five true leaves. Vegetable weevils are more of a problem in the high rainfall areas.
Cutworms hide by day but can be found by scratching the soil from the base of affected plants.
The brown pasture looper can be recognised by its stripes and looping motion. Loopers are sometimes only present around the edge of the crop. The vegetable beetle larva has been identified only recently as a pest of canola crops during emergence, especially along the south coast of Western Australia. Vegetable beetle adults usually do not damage emerging canola crops, since they feed on decaying organic matter. 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.