The beehive has some chalkbrood, which is a caused by the fungus Ascosphaera apis. It infects larvae that are then killed and shrivel into white chalk-like bits. There is no treatment per se, but there are various techniques used to combat chalkbrood. They include replacing the queen, discarding infected brood comb, providing water with a little clorox, and keeping hives well-ventilated but dry. We aren't at a very drastic stage of chalkbrood right now; that's not our biggest worry.
There is some new larvae in the bottom box (none in the top). The newest generation however is full of varroa mites!!! Bad news. I will put more powdered sugar soon.