I don't. But people who do either scorch them or dip them in boiling lye water. Since youre next question is about Varroa, are you trying to get them out of old hives? There won't be any Varroa in an old hive.
>Can one spot a varroa mite without a magnifying glass?
It's possible to see them. It's also easy to miss them.
I'm with Michael, I don't see a need for disinfecting equipment other than comb and frames which as a rule we rotate out and usually destroy. There is a well done study out of New Zealand that indicates there is no evidence of foulbrood being transferred trough bodies and bottom boards. (as long as the bee have not attached comb to the sides and stored honey) Pests, nosema and chalkbrood would seem to me follow similar criteria. I'm going to post a new thread under pest and disease with a link from New Zealand which address some of this issue as well as foulbrood control without chemicals. It has worked well for us.
>My question to all is do you treat only if you spot an infestation or every spring and fall.
If you wait to "spot" (as in see Varroa on bees) your bees will probably be dead before you realize they are infested. You should monitor the Varroa. That means ucapping drone brood, sugar rolls, or sticky boards.
>Here in Utah apistan is virtually useless.
There are lots of alternatives. Oxalic acid vapor, FGMO fog, Sucrocide, small cell etc.
Read up on here and you can learn much about them.
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