Yes, I usually don't bother them for five or six weeks (that will feel like an eternity )Inspected our split hive and the chalkbrood hive today. Used a tweezer to remove some of the mummified larvae. Didn't seem to bad mostly on the outer frames. Such a lovely calm hive, found the queen, hope it rights itself as would hate to get rid of her, mass of bees, the odd play cup,pleasure to inspect. Put a super on the split not sure if they need it but thought it would keep them busy. Desperate to get into the queenless hive but have to be patient, what is the minimum time we should leave them? Mentor said another few weeks
See if that chalk clears as the temps rise. If so just keep an eye early next year to see if there's a pattern.
I had one with quite bad chalk brood a few years ago, they always recovered and matched others for supers. I say always because I gave them a chance but enough was enough, I decided to cull and requeen. Winter did it for me.