Two days after I wondered about alternating miticides, my reading of
the April issue of Bee Culture advanced to page 26.  There I learned
that Dr. Patti Elzen advocated using Coumaphos for two years then one
of Apistan and then two more of Coumaphos.  This means people will
not be fretting about Varroa tolerance of Apistan any more, won't it?
 Dan

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