Here we may se what our professor is going to do. http://www.cyberbee.net/huangpub/2001ABJ.pdf
The newly invented â€œmitezapperâ€ combines
mite biology and a heating element
inside the comb to kill mites. Consistine of
colony (over 90% of mites if no worker
brood is in the colony). The new invention
requires no opening of the hive and beekeepers
need simply to hook up two terminals
outside a hive to a battery for 2-3 minutes.
Resistant elements in the comb heat
and kill both the mites and the drone
pupae. It is possible to regulate the temperature
to kill mites only and not to harm
the drone bees "
So at first he has tightly wired drone foundation and when drones are capped, he grills mites and perhaps drone pupae. .......and he needd a good hygienic behaviour too in hive.