A lot of useful info has been shared. Thought I'd chime in with this bit of information. I went down the rabbit hole last winter, and found out that a hermaphrodite is essentially a plant with a hormone problem. The plant isn't producing enough ethylene. That led me to the next logical...
They are all pretty slow growing. Im going to make more seeds with a vigorous SSH male and the F3 purp VI mother. Looks like this F1 lot is lacking vigor.
I got rid of them by shutting down my grow for 2 months. I let all of the soil completely dry out.
I got my tent fired up again, and I haven't seen them around. I set up sticky traps and so far ive caught like 3 gnats.
This is how the reveg is looking today. I will strip everything off the plant, and leave only 4 new branches, max. That way the plants energy is more concentrated and the reveg is quicker.
If you have enough headspace for the stretch, I say flip em. Prune all the larf bud sites around week 3 on 12/12. It will be be easier to see what bud sites wont develop properly.
Some growers might suggest "lolli popping". I personally don't defoliate unless it's absolutely necessary...