I have a young bay tree in a pot, which I received from my parents. It lives outside on a South-East Facing balcony.
For a long time after my parents gave it to me (maybe 8 months ago?) it didn't seem to be growing at all, and various of the existing leaves were gradually yellowing. There were also lots of holes in the existing old leaves which didn't seem to be expanding or increasing in number, so I assumed them to have been damage from previous insects. All-in-all it seemed pretty poorly, and I suspected that it had not really survived being repotted and given to me.
A month ago it suddenly started creating shoots, and has now grown a nice batch of new leaves (excellent!) but a week ago I was surprised to see more holes on the new leaves.
What are they, and can I do anything to prevent them?