I would leave the plants and try to get the grow to the finish. Chopping early will give you a crappy product. I would MUCH rather have good weed with a few seeds, then crappy weed that was seedless. You can remove the male pollen sacs as you find them. Looks like 3ish weeks for some of them.
wet your fingers and pull the nanners off, then drop them into a shot glass full of water. kills pollen. but finding the cause of the herm would be most important for future cycles. and a full wiping of your grow space, it gets everywhere.