Sierra juniper borers!

I've got a big Sierra juniper I collected in 2008. Last week I was working on it reducing some of the jin and out popped an ugly borer grub. I don't see holes anywhere near the live wood but I need to evict those buggers. Anyone have experience with this that can offer a solution?

Paul

Hello Paul. I've collected trees with woodworm before. Seemed to sort the problem out by spraying an insecticide directly into the holes.