Adamant.
Just a suggestion. I have never tried this.
Put a frame with moths on it into a large plastic sandwich bag and squeeze most of the air out of it. Take a Propane torch and squirt the bag full of Propane. It is heavier than air and will drive the oxygen out of the bag. Seal the bag and let it set someplace for a day or two. If the moths and the larva quit moving, they are probably dead.
If it works, PM me and let me know.
Regards
Joe