Odd to say that, since this thread already mentioned the very rapid
evolution for resistance to AFB in Hawaii.  Think about the very quick
evolution of resistance to tracheal mite in North America,   Not to mention
quick evolution of resistance to varroa by some races and local strains of *A.
mellifera*.  I also see signs of apparent progress in resistance to *N. ceranae *and SHB.

Sweeps through populations, culling out susceptible individuals, happen all the time.  Whether this is evolution or not is a semantic issue. It may lead to evolutionary change and adaptation in populations, but if it's just revealing traits that were already there, then no real change has occurred -- just a demographic shift.

I was just thinking about tracheal mites. To me the disappearance of them seems likely to be related to the constant applications of miticides, especially formic, to which they are more susceptible than varroa mites.

PLB

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