Sad looking olive tree

My olive tree that I’ve had for 4 years is looking a bit sorry for itself. A bug has eaten its way round my tree and some the leaves are turning brown. Any advice on what to do with it? It is potted and gets the sun in the afternoon.


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Nematodes are the way to go if possible as th80 has said as they are an organic answer to the problem. I haven't had need to use them, but know they are only active above certain temperatures.
There's an RHS article here that gives details of your options-
https://www.rhs.org.uk/advice/profile?pid=234
Hope you manage to save your tree.
Wisdom is not putting it in a fruit salad.
Im hoping that I’ll find a natural remedy for getting rid of this pest. Not sure if marigolds are still available to purchase this time of the year.
My olive tree is surrounded by a lavender bush. Which has beetles living and eating on it this summer.