Re: swarm in trap lost to hive beetles. ???
What Murdock said is the way I understand them. They don't attack and kill adult bees, more like laying siege to the hive, making life so difficult for them that they leave or cause them to become so weak they die of other causes. The larva tunnel through the honey and stored pollen, defecating as they go, ruining it for bees and people.
So, I guess it would depend on how one defines kill or attack.
I have had DE in trays under my hives for awhile now. It seems to be helping as I have only seen 4 or 5 so far this year. Our ground has been saturated since Sept., maybe that has kept them from pupating. Fingers crossed.
Ten years of Beekeeping before varroa. Started again spring of 2014.