I was going through my yards and came across two yards that have a very high percentage of queens being superceded. One yard had 30% queen supercedure on 30 hives the other was over 50% on 38 hives. It was extremely hot last week and the honey flow dried up. The hives had room to grow so crowding wasn't really an issue. Some are swarm cells, some are emergency cells and some hives have both. There is no chance of any pesticide in either area. I also have 3 other yards of similar size with very identical forage and situations that have no problems. What am I missing? The heat? The dearth? There was no swarms from the hives unless they were small swarms, it appears that the queen was killed or died. The queen pedigree? I have a high number of Kona's in the mix this year. The hives got the full cocktail of meds in the spring. The equipment is basically all new.