Hi Allen & all
> I think vaporized oxalic may be one.
I agree strongly!
I have done nothing about it yet, but I have been considering it.
Lets have some more on this topic, as it does not seem to crop up very
often.
Best Regards & 73s... Dave Cushman, G8MZY
Beekeeping & Bee Breeding Website...
http://website.lineone.net/~dave.cushman