I'm very glad to see Liz Walsh and Juliana Rangel continuing this line of
research. Their two recent studies give us food for thought.
In one, some miticides actually increased the amount of queen mating, which
may be a good thing.
In the other, miticide-exposed queens had smaller retinues and laid fewer
eggs.
They offer a good conclusion:
  > Given that queens reared in wax containing amitraz also had lower
egg-laying rates in a separate study (Walsh et al. 2020), research on the
prolonged effects of miticide exposure during queen development on colony
health deserves high priority in the research community and must be
actively communicated to the beekeeping industry so that better pollinator
management practices can be implemented, particularly in commercial
queen-rearing operations.

Randy Oliver
Grass Valley, CA
530 277 4450
ScientificBeekeeping.comV-powered.html
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