Wax moths are killed by freezing. All stages. I have heard that adult wax moths
are blown north in storms, and repopulate the area "up north". I keep my supers
in an unheated building. In the fall, I leave the overhead doors closed during
the day, and opened a crack at night. The temperature stays down this way. It
stays cool enough inside the building so the moths never really get going. Of
course, I live in northern Vermont where the nights are usually cool.

Cosman & Whidden Honey Co. wrote:

> Can anyone tell me if the common wisdom is based in fact, that all stages
> of wax moth are killed by freezing? If so, how and where do they overwinter
> in a climate such as ours, with several months of freezing temperatures,
> and with all supers held in unheated storage buildings? What should I do in
> the spring to prevent reinfestation in the supers which don't go on hives
> until July?
>
>