I believe there are some sprays, not sure how effective they are, but the bigger concern is that bees are pretty sensitive (as we've all recently learned). Obv

I believe there are some sprays, not sure how effective they are, but the bigger concern is that bees are pretty sensitive (as we've all recently learned). Obviously such treatments are only useful for commercial beekeepers - not the wild / feral colonies. The problem there is that it means commercial beekeepers have to keep using the same chemicals forever (or until the mites develop a resistance), as they'll continue to get re-infestations coming into their area.