So, I decided to harvest some royal jelly to use for priming cells - which makes it much easier to get the larva off of the needle and into the cell BTW.
So after removing the larva from 3 day old grafts I can't help but notice the big size range. I used a lot of magnification and made every effort to get uniformly young larva when making the grafts. Maybe I'll try an experiment and graft a few that I know are just a little on the big side next time and see if that is it.
I'm wondering if the size at this point would correlate to the quality of the queen - the little ones might be the good ones for all I know - or the big ones might be better fed?
If there is a correlation it would be pretty simple to take a good look and cull out the rejects - or harvest them for their jelly. Pretty simple for a hobbyist - probably impossible for a real producer I know.
I'm guessing that you commercial guys do some manipulations so that you have an entire frame of appropriately sized larva to graft from instead of hunting for good ones like I'm doing. Do you see this size difference too?