Quote Originally Posted by Jon View Post
A couple of years ago I spent an afternoon everting drones with Tim B and a lot were firing blanks, or were too old. I think if you want drones of the correct age for II you need to get the timing right with regard to when the comb goes in and when the drones are harvested. The ones that we were popping were just randomly harvested at the entrance of a colony by placing an excluder over the front once they were out flying on a sunny afternoon.
Marking Drones after hatching helps ! The newly hatched drones are easily identified and marked rather than taking them randomly using a queens excluder method like you and Tim did. For most persons who try II obtaining enough clean semen is the difficult part.