How many plants do you have? If you've got the time you can try something that might sound crazy, but it worked for me. I had a grow bout 2 years ago, 22 plants and 8 went hermie (timer puked while I was away and so ended up getting 18 hrs in the middle of the bloom period.) So, and I kid you not, I sat down and went over every plant with a fine tooth comb. so to speak, and hand picked every one of those fucking banana's off every plant, ate em too cuz I didn't want any possible particles of pollen floating around, lol
The first time took over 4 hours (but I had to check all 22 plants the first time), it was an extreme pain in the ass, but I was determined to get the better of them. Then every day thereafter I checked em again although after the 2nd time I was certain I'd narrowed it down to those 8 plants so it went quicker, about an hour each day for about a week or so as I recall. And after about 9-10 days I had won, NO MORE HERMIES!!!
I kept checking of course, but they recovered completely which truthfully I never knew was possible until then, still don't know if I've heard of anyone else doing that, but I do know it worked for me. Lotta work though let me tell you, lol, maybe more than it's worth depending on the size of your grow, but for 16 or so hours of back-breaking work I was rewarded with an extra 13+ oz's of good bud, so I say it was worth it. Since then I've gone to great expense to get some good light controllers and timers, no more cheap shite for me, I really don't ever want to go through that again.
Wish I could remember for sure the strain right now, but I believe it was Trainwreck, but with all the great strains out there I just decided to stay away from the ones that I've had hermie on me, and in that vein, I would hesitate to waste the energy using any seeds that might result from a hermie, cuz it seems to me you're just increasing the odds that your genetics will tend to hermie again. Some strains are just far more reactive to stress conditions IMO and unless it's some rare uber potent weed, I'll pass ;?D