I was reading and reading over the posts made about the super hive recently. In it, the keeper mentioned that he HAD a big crop going into the derth period there. He lamented that he didn't extract then. Later, when he was able to, he only had half that crop remaining. That perplexed me.
Was he suggesting that if you don't remove the crop before the derth, the bees will use it? If it is removed, then what do they do, shut down brood rearing until after the derth? This is a new concept to me, so please explain what I'm missing here.