Hello everyone, Nice to meet you all fallow bonsai "infested" people
I have a problem with a Birch I Collected this March.
A May beetle larvae attacked it and I observed to late
imageshack.com/i/hl2n84pwj
This is the invador
imageshack.com/i/idMRdYmrj ]
And this is the result.

I carved out the channel he made even the tree was collected the Spring i risked, but no larvae...so whats next?
Any advice?

Thanks!