-- Gavin Ramsay <[log in to unmask]> wrote:
>Huge selection pressure has revealed the very rare variants (probably new mutations) that can resist pyrethroids, but where has the variation for virulence come from?

i don't know where it came from, but i don't think it's all that rare.  the only time i saw hives that had a few years worth of apistan strips in them (new strips added every "treatment period", but none ever removed), they were crawling with mites.  these were not hives where honey was ever taken.  i'd be willing to bet that this would be a reliable way to breed for resistant mites.

deknow

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