Serious foliage damage has been recorded on a wide variety of trees, in spring and summer. Synthetic pyrethroids are effective against weevils. For species that hide during the day and feed at night, spray in the late evening or at night to ensure they come in contact with the insecticide. Western Australia has several species of cutworm. They can cause severe damage to newly planted seedlings by chewing through the stem at ground level.
Most damage occurs at night when the cutworms emerge from just beneath the soil surface.
The general name spring beetle includes several leaf-eating scarab beetle species that are active in spring and early summer. Heavy infestations have caused complete defoliation of established trees. Most of these beetles, if not all, are highly mobile, making control difficult, as the insects are able to re-infest after spraying. Synthetic pyrethroids have been successful in controlling this group of insects. Adding dimethoate to the spray provides some residual activity.