This is a fairly young tuart (Eucalyptus gomphocephala) that has been planted on shallow limestone. So far it has grown at a great rate. One year it had borers so it was fed and watered a couple of times to help it through summer.
There are three things here causing leaf damage.
There is a leaf miner causing separation of the leaf surface and causing blisters which would suggest leaf blister sawfly which can damage young trees. I have manually squished these before they hatch sometimes to help a struggling tree.
Gall wasps of some sort are making the dimples in the leaf.
Mites causing the silvering of the leaf surface by sucking the underleaf and damging cells.
Overall though, the tree looks happy.
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