Tom and all
We are using cardboard strips soaked into a solution OA/Glycerine against varroa since 2014
We start this southern hemisphere season bellow 0,1 % of varroa.
We saw damage in queen wings when we leave the strips inside the beehive for a long time especially during winter.
I can send you a photo if you wish.
best regards
Fernando
CORDOBA, ARG.
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