[Eliot Ness]

The only evidence of wood worms I have seen was in a Japanese radio I once bought.... it was full of old worm holes.  Just to be safe I encased it in a heavy duty black plastic bag, sprayed in some bug killer, and kept it quarantined until I was sure there were no live worms or eggs capable of hatching. 

I agree that a microwave might be a little overkill and would lean toward the freezer or chemical solutions if that was a problem I ran into very often.  Around here we have hard freezes during the winter that could substitute for a chest freezer or for a large cabinet.