“I have been using artificially inseminated Caucasian breeder queens from Two Rivers Honey Bees (Shibu Raj) for several years with good results. The genetics and service was exactly what I expected with no surprises and so far I’ve not experienced any of the near term supersedure problems that these types of queens are known for. I have been able to graft off of most of them for two seasons and look forward to ordering more each year. ”