Small hive beetle will attack a hive that has just swarmed.   This is a
natural weak hive and not a bad beekeeper.   This leaves open space in the
hive comb that is not covered by active bees.  Honey frames with unfilled
cells are prone to hatch larve.  The open bottom floor hive and the
observation hive with floor that can be vaccumed cleanned can survive the
small hive beetles.  The frame will have a scent that will keep the bees away
from cleanning the hive.  This can be solved by cleanning the hive floor.
The bees will begin to clean the frames of the small hive larvae as soon as
you remove the matted mass of debree.  The odor from this filth is the
problem.  When it is cleanned up the hive bees will begin to clean the frames
immediately.  If you have a solid floor tilt the box lowering the enterance
and leave the back side of the bottom open in the back.  This will ventilate
the floor and with a little rain will wash the floor.  It will also help the
bees in the carrying the larvae out the enterance.  The brood should be the
top box for it to survive in an effectted hive.  The hive will be very
defencive, were suit during cleanning.
Feral hives  are surriving the beattle attacks in the wild.  The ones with
room below the wax or open outside the tree hives.
I have not mentioned any chemicals to use but the construction of the hives .
Summary
Remove extra boxes to confine bees to brood, open bottom hive or tilt floor,
check and clean floor.    Michael Housel  Orlando,Fl