What a waste of resources. They have to keep raising drones to make up for what you destroy and that costs them a frame of pollen, a frame of honey and a frame's worth of water to raise that frame of drones...
Thank you for your reply. Your reasons for and opposition to the use of green drone frames is noted.
I went this route as the 24-hour drop tests were not producing mites. Since the sugar roll and drop tests are for mites outside of the cells, I was looking for correlation to what might actually be in the cells, as well as to keep on top of them. While I am a new beek, there have been hives in this exact location for eight years. A count of zero varroa mites didn't seem plausible.
It seems that no system, chemical or IPM, is perfect for removal of varroa. If the drone cells are infected at a much higher rate than the worker cells, and there was a high infestation rate, removing drone frames would seem to waste fewer of the bee resources than the bees opening and destroying many worker and drone cells. Yes, they can certainly tell much better than I which of the cells are infected, and I will waste more drones than are infected.
I still have the questions of which pupae stages I should be looking at, and whether the immobile rust colored varroa are adults or daughters.