yup,yup,yup on all the above but a strong hive wouldn't be taking over by either so I would guest this hive cant be strong any longer, easy way to tell is see if the hive has webs in the cells but I would bet SHB larva also..
I use diatomacious earth on the insert board of SBB out of bees reach. When beetles and larvee get in it they don't come out. But thats me. If you get DE be sure to get it for insect control and not Pool filter kind. DE is processed dif and not effective.
P.S. keep out of reach of bees.... or at least the ones you want to keep.
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