Re: Queenless hive rejects grafts
One other thought I had from those above. How old are the queenless bees. last I read indicates that the bees are nurser bees form 8 to 18 days of age. I had a problem with one 5 frame nuc this year not building queen cells and I concluded that it was because the population was to old. after a week anda half of adding frames of sealed brood they took to accepting cells much better.
I will also say that I eventually abandoned the idea of producing queens by grafting so to a long list of reasons. I am in the process of getting the queens I need with more of a walk away split method. It has it benefits and it's draw backs. having queen cells spread out over a 6 day range of development is one big negative. Having queen cells drawn is a plus. I will have to comment later on the quality of queens. they start emerging tomorrow. 47 cells when I need 14 queens. I am so gun shy about now I am not calling anything good enough even now. I seem to loose a ton of queens to mating flights.
Significant Minority vs Insignificant Majority, 20% of causes produce 80% of the effects.