I've been wondering: Apistan works on varroa when they are outside the
cell -- the so called phoretic state. Fluvalinate is hard on varroa, but
has relatively little effect on the bees.
Here's the question: Tracheal mites have to spend time outside the bee in
order to transfer to other (younger) bees. In such a state, are they
susceptible to some extent to Apistan (R), or are they -- like the
honeybee -- somewhat fluvalinate tolerant?
Allen