> >In my experience, it took 5 years for varroa to became resistan to amitraz
> (amivar-argentina) as a single treatment.
>
Thanks for this info Juanse. I'm quite surprised that amitraz still works
at all for U.S. commercial beekeepers, many of whom have used it
exclusively for a number of years, often at a high rate of application.
--
Randy Oliver
Grass Valley, CA
www.ScientificBeekeeping.com
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