> The study of the collapse and recovery of feral bees do to varroa shows us it can be as fast as 5 years 

You left this part out:

> Possible causes for this apparent recovery are natural selection for resistance in honey bees, introgression of selected resistant genetic material or reduced virulence of the mites. We cannot rule out that some varroa resistant bees from the USDA laboratory in Baton Rouge may have been represented. When we evaluated local feral material and bees from elsewhere thought to be surviving without management for varroa we did not find significant resistance.

VILLA ET AL.: HONEY BEE SWARMING AND SURVIVAL WITH V. destructor

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