Weren't you just trying to sell frames of drawn comb? Were those frames from these hives?
looks like someone dumped gas on them.
>I just sent a sample to Beltsville. for all 15 hives to have blocked entrances would be unbelievable. All had both top and bottom entrances and were clear. I burned all 15 hives just in case. It is a shame though.
Over reacting a bit?
All of my opinions and suggestions are based on my five decades of actual beekeeping,
not so much on book learning, watching YouTube videos nor reading internet sites.
I have never seen nor heard anything like 15 hives dying, bees all in place, within a week in the same yard. I keep all my bees around big ag and I usually roll my eyes when people want to blame pesticides. But I just can't see anything other than pesticide poisoning or intentional poisoning of your hives. Mites, foulbrood, blocked entrances, even starvation are just hard to believe with such a massive die off so quickly.
I'm sorry Illbeedan. That is a very hard loss to take.
i would guess these bees were exposed to something. For 15 hives to just up and die en masse likel this with food stores evident? Seems likely to be an insecticide.
But thanks for answering the question at hand!