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http://www.medwelljournals.com/fulltext/?doi=javaa.2009.1083.1085
Productivity of queen bee depends on her age, breed, breeding term, weight in emergency, age of larvae and grafting methods, number of ovariol, diameter of spermatheca, number of spermatozoa in spermatheca and if she has anatomical disorder or not (Wen and Chong, 1985).
One of the most important factors, affecting queen quality is the age of larvae.
According as the increase in the age of larvae grafted, a significant decrease has been observed in the body weight, the size of spermatheca diameter and the number of ovarioles in virgin queens (Woyke, 1967).
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In all studies about emergency queens it is reported that emerged queens are
made from 3 days old larvae. Bees rear a while younger larvae but those cells will be destroyed.
The feeding time of larva if 5 days. In emergency cases feeding time is 2-3 days.
As said before, if you look yourself the capped emergency pupa, you see that there is no extra food in the cells. In normal queen cells there are extra dried food inside the cell when queen is ready.
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If you graft queen larvae, you will see that bees often prefer to nurse emergency cells better than grafted cells. So it is not odd that some grafted queen may be worse than emergency queen. But then we talk about missfortune in queen rearing. You graft 20 larvae and you may get 5 queens.
I tired on this game and I rear my queens in swarming cells. I change the larvae.
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