I got 2 nucs installed on Father's Day. It's normal for us here to work a bit late into the season because we have frosts through the end of May!
I did my first inspection yesterday. I found very dark brown or black brood in some cells on only 1 frame. These aren't anywhere else on either nucs. The brood are hatched from their egg stage and probably a few days old, but dead and dry - not slimey, not capped. So, I'm pretty confused! I'm adding pictures.
Note, on this frame we have some open brood that are pretty big and matured in the cells, but they have little black specs on them. Clearly, my girls thought there was a reason to kill these brood. But what is the reason? I suspect mites on these ones because the brood is still white with only little specs. And I did see 3 mites in empty cells on the frame. But what about the dried dead ones sitting on the bottom of their cells? Could these just be ones who weren't tended to enough and didn't make it?