I look at that another way
All honeybee diseases are present at low levels somewhere all the time (paraphrasing Bailey)
Resistance also develops when a creature is exposed to sub lethal levels and survives
So let's say in the case of varroa my bees which are exposed to a low level of varroa because I treat them
And Ron Hoskins untreated bees have about the same chances of developing resistance
(Very low because its mostly the virus issues that kill the bees)
I would say our bees have more chance of developing resistance if they are still alive after exposure to the pest (at least the drones)
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