Randy

Many thanks for that.  I do not see any bad effects, although some colonies
will propolise the queen excluder in the immediate area of the lid; oddly,
this seems to happen more with yellower bees rather than black native ones -
I would have expected it to be the other way around given the propensity of
the many darker strains to gather propolis.

 Peter, as I recall,  you evaporate crystals in metal lids above the
cluster.  Could you please elaborate on your method?

 All here:

 http://www.stratfordbeekeepers.org.uk/PENotes/VarroaTreatment.htm

 Best wishes

 Peter
 52.144244, -1.503509

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