On 12/08/2013 11:17 AM, randy oliver wrote:
> Once alleles for resistance are present in the population, then it is 
> simple math to determine the number of generations for that allele to 
> increase in frequency. If all beekeepers in an area use the same 
> product generation after generation, and if the efficacy of kill is 
> very high, the frequency of resistant mites will increase rapidly. 
> Under less selective pressure, will increase more slowly if at all. 

It also depends on how many of the total population is exposed. Also if 
the resistance cost is high, the non exposed population may continue to 
out compete the exposed population.

Geoff Manning

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