Hello Bob, My picture on Barry's website is from a hive headed by a open mated Harbo SMR f1 queen from Texas. Mite drop from the open mated Harbo queens has been lower or about the same as my Russian hives. I have lost my SMR breeder from Ca. The bees didn't like the degree of inbreeding and continually tried to supercede her. I grafted one round of f1's but haven't had them long enough to make any good measurements. I expect to see the same range of mite drop I have seen from the open mated Harbos from Texas. I have removed about 100 or so uncapped purple eyed pupa from several frames and found mature female adult varroa mites in all instances but two. I looked for immatures in about 25 cells and found only 1. Uncapping about an equal number of sealed brood on the same frames failed to yield a single mite, even in the drone brood. In my area of the country, chemical treatment were only 30% effective at best. Camouphos resistance has been reported in other parts of the world and now reports of resistance to Oxalic acid have surfaced. Why not put a few of those SMR's on some 4.9. Let us know what you see. Maybe the magic bullet is SMR's on 4.9 :>) Best Wishes Dennis Murrell