Wax moths are attracted to brood frames, but will destroy honey super combs as well. The adult moths are attracted to bee larvae cocoons and feces. I can see the value in treating supers, dead outs, and frames used for swarm lures. I have been using Paradichlorobenzene, but am still concerned about it's toxicity to humans and bees even though it is approved. I don't have a specific reason to be concerned, just that it smells like moth balls and dissipates like moth balls.
The bee lab at the University of Iowa uses a different method for controlling wax moths in stored frames and boxes. No treatment is used for controlling wax moths. They store all their equipment along a wall with spacing in between. Each box is slanted downward, at about a 45 degree angle, allowing lots of sunlight and artificial light in each box. Being a University, they have a lot more available resources and space than most of us.