> I wanted to ask folks who have used the oxalic acid
> dribble treatment for varroa during broodless
> periods in the fall/winter if you have seen any
> changes or a time shift in the spring brood rearing
> in their bees.
>
> I have read in the Swiss studies that the OA can
> show spring build-up problems but did not give any
> specifics.

This concern seems in the air. At the last Qc
beekeepers annual meeting, I heard at least one
important beekeeper reporting similar observation.
Another one said he heard the same in BC for OA
drizzling. We were then asking questions about OA
mechanism of action on varroas and possible difference
between dizzling and vaporizing methods.
From what I understand, low pH of OA solution would be
the main factor of varroacide action.

Hervé








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