A small scale commercial beekeeper (40+ hives) here in West Dorset, UK, has recently taken up instrumental insemination in order to improve his stock.  He's surprised to find that about 40% of the drones are sterile!  Is this normal/usual, or is it a local problem?


Could it be a reason why queens don't last nearly as long as they used to, having run out of sperm?


Chris


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