I would be very interested in how fast a varroa mite reinfests a cell.  Eric
and Waldemar, you both  have an excellent points here, with multi-part
treatments, how many do you miss if you do the treatments 7 days apart
opposed to 10 days apart or would 5 days be better.
       Someone once told me that all of the intense drone cell removal that
I do in spring and early summer,  the mites will evolve into mites that do
not enter drone brood or worker brood where they would be safe.  I did not
take that too seriously, but here's the second time I've seen someone
mention something like that, where the mites 'learned' to reenter the capped
brood quickly to avoid being sprayed.  Don't varroa mites have to feed on
adult fluids for a while before entering the cell and birthing again?  Does
anyone know how many hours or days that would be?
   I just did a natural fall count after our 2nd sugar treatment, and I do
have the same two hives that I have been having trouble with all season,
show very high counts.  One of these hives had a severe case of  Deformed
Wing Virus in early spring that has actually cleared up.    I do have
several variations of hygienic type queens in all of our hives, and maybe
these two very infested hives have queens that I should get rid of, although
one of the hives had a very heavy layer and was put on the most honey.
     Thank you everyone for your help and comments.  I really appreciate it.
     Sincerely,
     Janet

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