Det är något jag hört, för att drottningen ska kunna flyga utan problem så måste hon sluta producera ägg en tid innan för att gå ner i vikt.
Googlade ämnet och hittade detta:
"Depends on the type of bee. Carnica bees are famous for shutting down all egg laying way before swarming. That is why they are so swarmy, they need to swarm because there is no open brood and the point of no return to normal hive activity has been reached.
Good Buckfast queens stubbornly continue to lay eggs, no matter what and how many swarm cells the bees build. That is why it is so easy to control swarming in Buckfast bees. Also it results in bigger hives throughout the season. While Carnicas are shutting down the broodnest all the time for the slightest reason which is a pita to work with.
So it clearly depends on what bees you have there."
Det kanske förklarar saken, Carnicadrottningar slutar lägga ägg en tid innan svärmning men inte Buckfast.