Re: removing all young larva before introducing grafts
I start my cell builder in the spring as a double deep. A cpl days before I am ready to graft I move open honey, pollen and 4 or 5 frames of mostly capped brood to the bottom box. I shake the frames of open brood into this box. The queen and everything else goes to a new location.
This leaves a queenless box packed with bees to be my cell builder/finisher.
Every Friday I graft and put 45 cells per cell builder. The next Friday, 7 days later I pull the capped cells and put them in an incubator. I then pull out an empty frame where the capped brood has hatched and replace it with another frame of capped brood I pulled from my breeder queen hive. I keep my breeder queens in 10 frame boxes so while I am looking for a frame with the right age larva to graft from I pull a frame of capped brood. This frame often has some open brood. I always place this frame next to where the cell bar frame goes so I can check it the next friday and destroy any rouge queen cells. I also sweep the nurse bees from the frame I am grafting from into the cell builder.
I currently have 3 cell builders that I have been running like this since the last week of March. With the fresh bees hatching each week plus the ones I sweep from the frames of open brood they do a great job on 45 cells.
"Suppose you were an idiot and suppose you were a member of Congress. But I repeat myself." - Mark Twain