I also worry about my bees. I have also noticed a cut back in egg laying by my queens which are Carnolians but the Italian ones seem to still bee laying as they normally would in the summer. I was told when given the Carnolians that they tend to stop or cut back on the laying earlier than many other breeds.
I only have one hive, I figure is in winter trouble as they just can't seem to get anything stored in the second deep for some reason beond me. I have a third deep on my strongest hive which I fully intend on robbing a bit latter, then giving it to my weak hive to see it that could get them thru winter. I think a requeening come spring is in order.
Since four of my hives were swarms collected from the end of June to the end of July I treated them for mites and just pulled out the strips after 42 days which ended up being Sept 1st. I think it is to early to put more strips in there again because 42 days would end up being Nov. 14th or some thing like that and really cold & wet here.
I will treat them for AFB though.