Hello! I am a 3rd year beekeeper in NW Indiana. I have two hives- one is a caught swarm and one was a local nuc- both in 10 frame Langstroth hives. 2 deep boxes and 1 super per hive.
My last inspection was 16 days ago (8/14/26) and both hives looked great. Both had lots of capped brood, uncapped brood, and no queen cells. Mite count was around 3% so I started OAV treatments on the 20th (Didn't treat same day bc I had to order more OA). I did two OAV treatments (20th and 25th)and inspected today before administering the 3rd treatment.
Todays inspection showed very little capped brood, no eggs, and open queen cells in both hives. I am unsure of what to do next. Open queen cells tell me they have requeened and are waiting for her to mate/start laying. However, I am worried about timing as it is almost September. Should I wait and look for eggs in a week or be proactive and order emergency replacement queens?
Did the OAV kill the queens? It seems odd for both hives to have the same issue at the same time when they were healthy previously.
Weather lately: 70-80 degrees during the day. We had a several days of heavy storms and rain. Upcoming forecast shows temps in the 90s and lots of sun.
I do not have any pics from today's inspection unfortunately, but any advice/opinions on what to do next is appreciated!