The "Horner method" is a means of controlling the flight times of queens and drones to achieve selective mating. It involves allowing the virgin to orientate to her location prior to her mating flight, then delaying the release of virgins and drones until feral drones have largely left drone congregation areas. This was in Australia, but others might substitute 'feral' for any drone with undesirable genetics - Italian, Russian, Buckfast, stroppy, black, yellow, red, blue … take your pick (and no offence meant ).

Has anyone tried this? I see that Pete L has posted on this on the BKF.

In this article the genetics of drones and offspring were tested and it appears to provide about 85% control over matings i.e. this number were of the desirable type.