> Demonstrated by Apis cerana.
 Varroa is handled by cerana in three
 main ways.

1. varroa does not reproduce in the worker brood of cerana therefore 
limiting reproduction to only times when the colony is producing drone 
brood.

2. swarming. Cerana swarms more than any race of bee I have been told which 
limits varroa.

3.cerana keeps an opening in drone cells from which to extract varroa from 
cells.

Mellifera is not known for any of the above and not likely to change any 
time soon .

A bee which can handle varroa (untreated) as managed in commercial 
operations today seems unlikely but we must remain optimistic.

bob 

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