We do not recommened reducing the dose further than what is outlined on the registered label for your region. Both products have the ability to deliver superior varroa control by causing significant mortality to phoretic varroa, all castes of varroa under the brood cap, and impacting the fecundity of surviving varroa. All of our studies to date reflect a standard hive configuration, 10-frame langstroth or equivelant. We are working on testing more common small cavity hive styles that may require different dosing.
Always keep in mind that high mite infestations may require more than one treatment.