>>> I've been doing that <incorporating outside genetics for 10 years with little/no success.
<><><> Have you been using the imported queens as queen mothers or have you been using them as drone mothers? I'm wondering if there might not bee a significant difference. My thoughts are that using the imported queens as drone sources and my own queens as the source for new queens I might incorporate several different lines (partially) into each new colony and thus have a variety of workers within the colony that attack the varroa problem in different ways. Thoughts about this are appreciated.
Mike in LA
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