Re: Can varying levels of resistance been seen when using brood breaks to manage varr
Something I've been thinking about recently is the plausible desirability of passing on the right sort of mites. VSH bees tend to 'breed' low-fecundity strains of mite, and that's the bit that really helps - the mites simply don't have an ability to blow up their population quickly. Any more fecund mites that are bought in aren't a problem (as lons there aren't thousands of them) since a) the bees subject them to the same treatment, breeding their fecundity out, and are aided b) by the low fecundity strains already present.
What this means is its better to have a medium low-fecundity mite population than to have none or very few.
Quite how thought this should condition our understanding and management equations I haven't figured out yet. It does make me wonder if part of the problem of failure of introduced 'resistant queens' in a treating apiaries might be due at least in part to the wrong sort of mites. A new queen should come equipped with a good few of her own mites to help her.
The same idea might be helpful within non-treatment apiaries, and might have a place in brood-break efforts at control - though how to work that for resistance building still eludes me.
The race isn't always to the swift, nor the fight to the strong, but that's the way to bet