> There are a number of isolated 
> operations that do not treat for varroa, so apparently have some level 
> of resistance. But when you remove those genetics from that particular 
> location, the "resistance" doesn't necessarily carry with it. I've 
> taken queens from reputable "treatment free" operations in TX, or VT, 
> or AL and transplanted them to NC and watched their mite levels 
> (unrecorded, unfortunately), and all eventually collapsed due to varroa.

I've had similar results here in MA. I have ended up treating all of them because of high mite levels. Some still collapsed. I've had better luck with Italians out of GA. Probably because I know they're not resistant and therefore, manage them better. PPBK rears its ugly head all the time in my operation.

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